Making that room even quieter

Today we improve our home comfort with more strategic ways of eliminating room-to-room sound transmissions.

As mentioned last week, the most opportune time to do so is when renovating your kitchen, bathroom, or really any room in the home. Essentially, if you’re going to be moving or opening up a wall in order to redirect wiring, plumbing, or ductwork, then you might as well be taking advantage of this opportunity to create a little more privacy.

Why the need to block the transfer of sound? Because silence is golden, and after your 12-year-old has returned home with a set of bagpipes as his musical instrument of choice, silence will maintain your sanity.

What decreases sound from transmitting from point A to point B? Distance and obstacles. With the average residential building lot being anywhere from 50 to 60 feet wide, increasing the distance between the theatre room and your desktop computer is going to be a challenge.

So, we’re left with the alternative of obstacles.

Disclaimer: The following sound-blocking procedures will effectively muffle general sounds created in the home, however, the enactment of said procedures should not be used in falsehood, or as a crutch, for a person’s habit of selectively hearing.

Yes, we can reduce the sounds being transmitted by the loud operation of a television (producing about 60 decibels) being operated in room A, from entering room B, to little more than a whisper. However, a human cry for attention (producing about 80 decibels) should the lady of the home see a mouse, or be attempting to get a long-overdue chore completed, will indeed transmit through, albeit not quite in its entirety.

Regardless, if there’s no movement on the part of the person on the receiving end of this cry, know that it’s not so much the sound blanket doing its job, but the fact you are indeed being ignored.

With a regular, hollow-core wall assembly having a STC (Sound Transmission Class) rating of about 32, it would be nice to boost this wall assembly up to a STC 55, thereby muffling out most loud noises.

Step one: Fill the space in between the studs with Roxul’s Safe n’ Sound insulation, immediately boosting our wall assembly from a STC 32 to a STC 42.

Next, and before installing the drywall, fasten a sheet of 0.75”x4’x8’ Sonopan to your wood studs. Sonopan, recognized by its green colour and dimpled texture, is a lightweight fibre board that adds another 10 STC points to your wall assembly.

With both the Roxul Safe n’ Sound and Sonopan fiber sheets, our wall assembly now stands at an impressive STC 52.

Getting to our goal of STC 55 is going to require the help of a slight air space, along with a bit of solid mass. The air space will create a drum effect, further dissipating the transmission of noise, and will be provided by the addition of steel moldings, referred to as resilient channel. Installed horizontally at every 16 inches on centre, and placed directly over the Sonopan panels, the resilient channels will be fastened with 2.5-inch screws, reaching through the Sonopan, penetrating into the wood studs.

Avoid using regular 1×3 spruce strapping for the creation of an air space. The spruce’s mass will allow sound to reverberate through the wall, whereby the resilient channel’s mass is minimal, offering no route for the sound to follow.

Next, we follow up with two layers of 5/8” inch drywall, as opposed to a single layer of half-inch drywall. The 5/8” drywall provides the mass we’ll need to reach our goal of building an STC 55 wall structure. The first sheet of 5/8” drywall will be fastened to the resilient channel, but won’t penetrate the Sonopan board, while the second sheet of 5/8” drywall gets fastened to the first sheet, effectively creating a break in sound transmission.

Bonus to the 5/8” drywall is the double layer of fire-resistant product.

That’s how we keep things quiet.

Good building.

As published by the Standard-Freeholder

Handyman's Hints Standard-Freeholder Cornwall Ontario by Chris Emard

Thar she blows

Postmedia Network Blowing insulation into an attic is fairly easy, especially if you follow the advice of our handyman.

Today we’re going to be adding insulation to an existing attic.

The home in question was built in the mid 1970’s, and presently has about six inches of fiberglass insulation on the attic floor, providing about R-20 of thermal value. With today’s attic insulation standards set at R-60, the homeowner will need to add about 14 inches of Atticat blowing wool.

Why add insulation to an attic that’s already insulated? Because this attic is insulated to 1970’s standards. In the 70’s, energy and electrical costs were relatively low, the economy was strong, and the Montreal Canadiens were winning Stanley Cups. So, it was no big deal having to put on a sweater before curling up under the covers, because hey, the Habs were winning hockey games. Today, the Canadiens wouldn’t recognize the Stanley Cup if it walked up and bit them on the butt, so there’s no celebratory mood to help warm your cockles.  Furthermore, home heating costs are atrocious, while Justin Trudeau’s focus is on getting fitted for his dragon embroidered Changsha (traditional ceremonial robe) in preparation for his trip to China, because that’s what Chinese men wear every day, apparently, with the deficit issue far down his list of concerns.

So, we’re left to fend for ourselves, which means reducing our heating bills by bumping up our insulation levels. Why choose a blowing wool, as opposed to fiberglass batting, to insulate an attic? Because the blowing wool strategy provides the homeowner with longer arms, allowing them to distribute the insulation matter from a series of vantage points, thereby eliminating the risk of having to gingerly step across the truss joists. The suggestion to use the Atticat strategy is based on the element of P&P, prudence and probability. The safety relevance of the P&P is based on what’s referred to as ‘balance beam heartbreak’, which simply refers to the fact 40 per cent of gymnastic injuries are balance beam related. Considering this beam measures four inches wide, and is stepped upon by trained athletes, what are the chances of the average do-it-yourselfer making it safely across a series of truss joists that are only 1-1/2 inches in diameter? Unfortunately, official documentation regarding this action is limited. However, ‘prudence’ tells us the average non-gymnast homeowner should be avoiding the strategy of straddling joists as they place batts individually over the attic floor, because ‘probability’ tells us the resulting fall will drive one’s scrotum up into their body cavity.
So, with this vision in mind, cut yourself a couple of 16”x48” sheets of 5/8” plywood, or pick up a couple of 2×10 pieces of lumber, and toss them up into the attic beforehand. These will provide a safe walkway as you slowly manœuvre over the floor joists.

Step one to this project, ensure the attic space will be adequately vented. For this job, you’ll need to staple vent baffles, aka rafter mates, in between each truss. The vent baffles prevent the insulation and blowing wool from blocking air from entering the attic through the soffit. Then, make sure there’s adequate roof venting to create this necessary draft of fresh, outdoor air. The roof venting requirement can be satisfied by having an accredited roofer install a Maxivent type of product near the peak of the roof.  Next, create an extended attic hatch tunnel by stacking 2×8 lumber edgewise along the perimeter of the hatch. This extended tunnel will prevent the blowing wool from falling through the attic hatch door. Since we’ll be requiring about 14 inches of Atticat blowing wool, use a tape measure to mark the 14 inch necessary depth along the truss webbing, or staple a series of Atticat paper rulers to the joists at 10 ft. intervals. In order to add R-40 of thermal value to this attic space, the amount of Atticat required will be based on the calculation that one bag of Atticat blowing wool will provide 49 sq. ft. of coverage. Be sure to watch the Atticat install video, and follow all instructions.

Good building.

As published by the Standard-Freeholder
Handyman's Hints Standard-Freeholder Cornwall Ontario by Chris Emard

Ice belongs in your freezer, not as icicles dripping from your roof

QMI AGENCY FILE

Today we continue with case No. 913, involving Alison Shiver, and her husband M.E. Timbers.

To recapitulate, the ‘Shiver me Timbers’ people are dealing with the fact their roof is producing more ice, in the form of icicles, than the 10 commercial freezers working 24 hours a day at their ice cube company.

The problem? A home attic space that’s too warm, due somewhat in part to heat infiltrating into the attic space, and largely in part to an under-insulated attic floor.

Step one to remedying the infiltration issue involves sealing the gaps found where the electrical outlet’s octagon boxes, and venting ductwork, penetrate the ceiling’s drywall. Products that would serve well in filling these gaps would include an ‘acoustic seal’ caulking, or ‘Gaps n’ Cracks’ spray foam.

Next, we need to ensure any exhaust ductwork traveling through the attic space is not emitting heat. Often, bathroom fan ductwork is fed through the attic, then exhausted out the soffit, or worse, left lying on the attic floor, feeding warm air into what’s supposed to be a cold environment.

One, ductwork travelling through a cold space, such as your attic, needs to be insulated. This can be accomplished by either by wrapping what’s existing with fiberglass insulation and a six-millimeter plastic, or replacing the ductwork with the insulated version of whatever flexible pipe is needed.

Next, we make sure this duct vents out a gable wall, or better yet, out the roof. Because the soffit acts as intake ventilation, the feeding of warm, moisture-filled air created by showers and baths into this area is counterproductive.

Maxi-vents located at the peak of the roof work in conjunction with the soffit vents to create a draft.

Essentially, feeding your bathroom exhaust into the soffit will only have it re-entering the attic space. Venting out a gable wall, or the roof, ensures this humidity gets lost in the atmosphere.

Next, remove those dated pot lights and replace them with the significantly more efficient, non-heat producing, LED-recessed lighting. Pot lights are notorious for their inefficiency, the fact they create heat, and their habit of allowing warm air to infiltrate the attic space.

So, make the change to LED. Fitting tight to the ceiling, and being a fraction of the thickness of a pot light, the newer LED fixtures don’t protrude into the attic space, and therefore will require no special protective cover over top, making them an easy, value-added renovation decision.

Then, we insulate. Because heat rises, and cool air sinks, there’s a big benefit to adding insulation to the floor of your attic. Basically, insulation slows down the transfer of heat, or the transfer of cold, from one space to another.

The more insulation or R-factor that you have in your attic, the longer your living space below will stay warm, which will result in lower fuel costs.

The new home standard for attic insulation is R-60. In order to achieve this level of thermal value, a homeowner would need to cover their attic floor with about 18 inches of fiberglass pink insulation, or about 22 inches of Atticat blowing wool.

Most homes have at least six-to-eight inches, or about R-20 of insulating value in their attics already.

So, you’re basically needing to top things off to our 2018 standards.

Fiberglass pink comes in batt form, whereby a standard attic “batt” is 24 inches wide, by 48 inches long, by the desired thickness. Choosing the batt strategy will require the homeowner (or hired hand) placing each piece individually across the attic floor. If this is to be your preferred method, choose the R-20, six-inch thick fiberglass pink batt. This thickness of batt handles easy, and gets you to your R-60 goal quite effectively by using a crisscross pattern of laying the second series of batts over the first.

In Alison and Mike’s case, we’re going to be choosing the Atticat blowing wool. Next week, we find out why.

Good building.

As published by the Standard-Freeholder
Handyman's Hints Standard-Freeholder Cornwall Ontario by Chris Emard

Warming your timbers

Case no. 913 has us examining the home owned by one Alison Shiver, along with her husband, M.E. (Michael Eliot) Timbers.

Together, they own and operate ‘Shiver Me Timbers’, taking advantage of this match made in heaven to become the new owners of the local ice cube and ice block company, formally owned by retired seaman L. J. Silver. With over one million cubes of ice being manufactured daily, the Shiver Me Timbers people know how to make and bag ice. Incredibly though, the Shiver Me Timbers company still ranks second in ice production to an element that’s thankfully not a retail competitor of theirs. Who might this element be? Oddly enough, it’s the roof right over their heads.

Alison and Michael’s roof produces icicles, which unfortunately due to the rather stringent laws regarding the use of petroleum oils and granular roof matter in foodstuffs, prevents these icicles from being bagged and sold as a natural after school treat. So, with no profit to be made by harvesting these icy daggers, or added benefit of introducing “Icy Roof Treats” to the company’s line of products, it’s time to eliminate this obvious display of home inefficiency.

Regardless of how charming icicles look in a Hallmark Christmas card, they’re a sign of heat loss. Heat loss in a home is going to happen. We lose heat through our windows, our mechanical exhaust vents, and every time somebody opens a door. Those heat losses are inevitable, not so controllable, and other than having a bunch of poorly operating windows, are no real cause for immediate concern.

However, a warm attic in the thick of winter is not a good thing. Essentially, your attic is going to end up catching a cold. Heat being produced in the home naturally rises up. If this heat, and accompanying moisture, is allowed to infiltrate the attic, it’ll continue up towards the plywood or roof plank underlay. When the plywood warms up, heat gets transferred to the shingles overtop, which melts the snow. This snow melt then races down the roof until it reaches the overhang, the only part of the roof that’s cold because it has no heat source underneath. When the snow melt crosses the overhang, it begins to cool, then freeze, just as it’s attempting its leap off the roof, forming the not so cherished icicle.

Unfortunately, hanging shards of ice will be the least of your worries. If the snow melt fails to make its way to the edge of the roof, it’ll join the ranks of the other icicle wannabes, and become a member of an even more notorious group, known simply as the ice dam bad boys. When heat is allowed to rise into the attic, condensation often forms on the plywood. Now you’ve got a couple of water sources in your attic, one as a result of an ice dam forcing snow melt back up and under the shingles, along with moisture dripping down from the plywood underlay.

Two bad things about these scenarios. One, wet plywood eventually rots. And two, the condensation drippings will fall into whatever insulation you have in the attic, lessening its thermal value, forming mold, and eventually making its way to the ceiling’s drywall. So, how do we keep our attics nice and cold in the winter? By sealing any breach in the ceiling’s drywall, removing any heat sources, and most of all, by insulating.

Start by removing the decorative collar around any hanging light fixtures and ceiling exhaust vents. Sometimes, the drywall cut around the electrical box, or ductwork, isn’t so perfect, which will allow moist air to draft up into the attic. So, seal this gap (if it’s a 1/4 inch or less) with an ‘acoustic-seal’ caulking. Larger gaps can be filled with a ‘Gaps n’ Cracks’ spray foam. Next, make sure any ductwork or venting pipes running through the attic are insulated, and, that they’re not exhausting directly into your attic space.

Next week, we’re insulating our attic. Good building.

As published by the Standard-Freeholder
Handyman's Hints Standard-Freeholder Cornwall Ontario by Chris Emard

Inevitable roof moss

Some things are inevitable.

Every time I watch a movie called Titanic, the ship always sinks. Just the other day, I caught the 1997 version of “Titanic” about midway through the movie. Even though I’ve watched this same film about five times, albeit in portions, I still held hope that maybe the ship wouldn’t sink this time. But it did. You would have thought Captain E.J. Smith could have avoided that darn iceberg, since it hadn’t moved in 20 years, while Leonardo DiCaprio still managed to slip into the frigid ocean waters and die, after once again failing to find a half decent floatation device to support both he and Kate Winslet.

Spring and fall in our part of the world means our local weather reporters need only to remember three words when describing what atmospheric conditions we all have to look forward to in the morning, them being “wet and cloudy”.

If you own an asphalt or cedar shake roof, then persistent wet and cloudy conditions will lead to moss and algae growth, it’s inevitable. Moss and algae are basically plants. As a result, they require everything a plant needs to survive, including plenty of water, relative shade, a sprinkle of sunshine, and a reliable food source, or basically, the exact environment provided by the average roof in any one of our three united counties. Moss and algae differ from regular plant life in that they have no roots. However, they stick really well to practically any non-metallic surface, and once established, will do what plants and all living organisms do, and that’s multiply. Moss and algae are basically esthetic issues, whereby in mild cases, their appearance is worse than their bite. However, if allowed to persist, moss will grow in between the shingle tabs, loosening the necessary bond between these tabs, creating a path in which water could infiltrate into the plywood below.

When that happens, you get a roof leak, with the only solution to this problem being total roof shingle replacement. Unfortunately, knowing why moss exists on our roofs, doesn’t make avoiding or preventing it from happening any easier. The problem is the huge iceberg, which in this case represents our very accommodating environment. Temporary solutions to eliminating moss are those related to either cleaning or scrubbing the moss off the roof. The same type of bleach, ammonia, or regular home cleaning soaps that would be effective in cleaning mold, would be effective in removing moss. Roof, siding, and deck cleaners are also available on the shelves of your local building supply centers. The only issue of course is that your moss problem is situated on a roof, which is not only sloped, but has a granular surface that could become loose with basic foot traffic. Slope plus loose granular surface plus a 16-24 foot drop that leads to a sudden stop equals not having to worry about your moss problem anymore.

So, unless you own the same type of roof harness worn by professional roofers, I recommend avoiding that climb up the extension ladder. Besides, cleansers can be a little harsh on your plant and garden beds below.

What about pressure washing? Bad idea. Pressure washing from ground level will separate your shingle tabs and drive water underneath, basically achieving in minutes what will take your moss years to accomplish. Pressure washing from above is also not recommended because you’ll loosen the granular surface, again, aging your roof unnecessarily. Essentially, you’ve got to melt the iceberg, which means changing the environment. This can be accomplished by installing a strip of zinc banding just under the roof capping, or first row of shingles near the peak of the roof. Perform this task in warm weather, enabling you to more easily bend back the shingle tab. When it rains, tiny particles of zinc get washed down over the shingles. Zinc is poisonous to moss and algae, so in time, the moss will loosen up and fall off. Good moss fighting.

As published by the Standard-Freeholder
Handyman's Hints Standard-Freeholder Cornwall Ontario by Chris Emard

Once upon a roof

Roofing has changed quite a bit over the years. Postmedia Network

Home builders once used 1×8 spruce planking to cover the roof trusses of a new home under construction. That was once.

The strategy basically involved the following. Build the retaining walls for the poured concrete foundation using 1×8 spruce lumber. Then, once the cement was dry, the spruce planking would be removed and used as sheeting material over the roof trusses. One product, serving two purposes, and although a little labor intensive, produced hardly any clean-up or waste to speak of. In those days we also put chains on our summer tires for better winter traction, used rotary phones, and thought lawn darts to be a great summer game for the whole family.

Times have changed. Winter tires have become the standard, rotary phones are about as common as a Stanley cup parade down Yonge Street, while lawn darts have been taken off the retail consumer shelves completely, having been remarketed as the preferred weapon of choice for those low-budget mercenary types.

Was the use of 1×8 spruce planking as a roof sheeting a bad idea? In retrospect, no. Back then we were roofing homes with what was known as an organic shingle, due to its base consisting of a mixture of asphalt and wood fibers. Organic shingles were flexible, and molded themselves easily over the not so perfect 1×8 planking. Plus, warranties back then were in the 10-15 year range. So, if a roof lasted 10-12 years or so, people were generally satisfied. If tearing off these old shingles and replacing them with new ones seemed excessive, people would simply re-roof, adding a second, or even third layer of asphalt shingles. If the homeowner chose to go with steel roofing, as opposed to asphalt, then the steel would either get screwed directly to the planking, or the installer would first install 1×4 rough spruce, spaced every 16-24 inches, over the existing 1×8 planking. Either way, emphasis concerning the protection of one’s home was placed on the surface product, not so much on the substrate.

Today, roofs occasionally leak. In the olden days, they leaked a lot. Why roofs leak less today has everything to do with the substrate, along with better education and information relating to proper venting, and attic insulation. So, what have we learned over the years? 1×8 spruce lumber will expand, shrink, and with prolonged exposure to water, will of course rot. However, the main knock against the old plank system is the issue of movement. You can’t install something that doesn’t want to move, like fiberglass shingles, or steel roofing, over something that naturally, due to our varying climate and atmospheric conditions, can’t stay still. That would be like wrapping a puppy in gift paper, setting it under the tree Christmas Eve, and expecting it to stay still, without wrinkling or tearing the wrapping paper, until the surprised recipient picks it up the next morning.

When the substrate moves, screws loosen, nails pop, and when the shingle tiles separate from each other, or in the case of steel roofing, the overlap on the ridge develops a gap, your roof will no longer be water impermeable.

The first sign of a breach in the roofing system is the decorative sunburst that develops on your ceiling, or a domed ceiling fixture filled with water, enabling you to create the very unique ceiling fish bowl (just don’t turn on the power).

The key to a roof’s long term success in shedding water is stability, and that can only be achieved by nailing or screwing it into plywood. So, if you own a home with a boarded roof, be sure to remove all existing shingles, then fasten a layer of 3/8” spruce plywood directly to the 1×8 lumber. Next, cover this plywood with a quality synthetic felt, then install the required roof venting. Your roof is now ready to receive the finished product.

Good building.

As published by the Standard-Freeholder
Handyman's Hints Standard-Freeholder Cornwall Ontario by Chris Emard

Nothing simple about this standard

Keep it simple! Those were the bold words expressed to a supplier by the chairman of our negotiating committee as we were discussing a pricing and rebate program some years ago.

This fellow, the owner of 24 lumberyards across Western Canada, was probably the most intelligent person in the room. Regardless, his goal was to negotiate the simplest program possible, something your average fourth grader would understand. He has since retired, sold lock, stock, and barrel, then built himself and his family an ocean front home in Hawaii. Now that’s keeping life simple.

Perhaps it’s being a little selfish, but I wish this fellow had delayed his retirement and been given the task of running the MMA (Ministry of Municipal Affairs). At issue is the MMA’s Supplementary Standard SB-12 for 2017. I refer to it as Supplementary Bullcrap-12, due to the fact my lack of education prevents me from fully comprehending what exactly is being asked and specified in this new for 2017 insulating home initiative.

From what I can decipher, and based on such factors as heating systems, window efficiency, floor design, number of levels, whether you have two to three cats in the house, and your preferred brand of beer, there are between six and 13 manners in which to strategically insulate a home.

I use the term strategic because even within the parameters of the SB-12 compliances, there exist sub-manners of install, based on whether these particular areas will be regarded as finished areas, storage, or simply open.

So, when my limited intelligence prevents me from understanding a concept being presented, I naturally seek the aid of someone more educated. My question was simple, and related directly to the proper and allowable use of sheeting tape and vapor barrier on a finished concrete basement wall. First I spoke with a building engineer, who gave me his interpretation of the standards, and as such, related to me his preferred method of install. “OK, I accept your interpretation”, I said, “but based on the various scenarios I was presenting, what was the rule? There’s got to be a rule, or procedure to follow, right?” I stated. “Well, we’re not all on board yet” was his reply.

How can the “we” (a.k.a. next level of intelligence) not all be on board? What type of direction will us lesser folks be facing if the “we” don’t have the answers?

At this point I decided to go straight to the horse’s mouth, called our local planning department, and asked them the same basic question regarding the insulating of a basement wall, and the necessity or use of a vapor barrier and tape. That was two weeks ago. So far I’ve co-ordinated with two people, neither of them are familiar or confident enough in their interpretation of the new regulations to forward me an answer, and have as a result, differed my inquiries to the building inspection staff for further consultation.

Now when I call, in an attempt to speak with a human being, I get the answering service, which transfers me to a mail box, to which I leave a message received apparently by no one. This whole scenario reminds me of the movie Terminator 3 Judgement Day, whereby the engineers, planners, and architects working on this SB-12 proposal, have designed a system so complicated and so complex, that they’ve lost all control to a series of computers that will someday bury us all in mounds of fiberglass.

My real lack of understanding of the SB-12 document is in part due to the over use of the word “coefficient”, which in the document is often followed by a series of shapes and lines that appear to be more closely related to oriental calligraphy. When I look up “coefficient” in the dictionary it simply states ‘term used by those of higher learning, with there being no actual meaning’. Very strange, very strange indeed.

Next week, insulating your basement with Arnold Schwarzenegger. Good building.

As published by the Standard-Freeholder
Handyman's Hints Standard-Freeholder Cornwall Ontario by Chris Emard

The attic as a tuque

Properly insulating the attic is an important part of home heating. It’s also definitely a do-it-yourself job. Postmedia Network

There are two types of tuque people — those persons with a mop full of hair who selectively wear tuques as a fashion statement, and the follicly challenged, who on a cold winter’s day, depend on this garment for their ultimate survival.

The tuque, for all its simplicity, is nevertheless an effective tool in guarding our heads from two of the basic characteristics of heat. These being that heat rises, and that heat naturally moves from hot to cold.

Therefore, understanding that a warm entity, such as your body, or your home, doesn’t absorb cold, but conversely loses heat, gives us a better understanding of the value of insulating your head, and our related topic of today, your home’s attic.

Now, what about the row of shirtless guys with painted letters on their chests that frequent -25 degree Celsius professional football games, why aren’t they freezing, you may ask? Unfortunately, the science of heat transfer cannot be altered by applying paint to one’s chest, nor can it be subdued for any length of time with the use of alcohol, hallucinogenic drugs, or the vocalizing of inspirational chants. With heat escaping their bodies in great volumes with every second that passes, these brave souls will have approximately a 10-minute window in which to get themselves on camera. If their moment of glory should pass, the boys will have some humbling choices. Either continue their shirtless crusade, and die like real men or, toss on their jackets and huddle up like a gang of emperor penguins. Regardless, shame and humility is in their future.

So, your home, like a lettered body up there in row #102, requires insulation, not so much to keep the cold out, but to keep the heat in. And, due to heat rising, and cool air sinking, properly sealing the space between living area and attic space becomes even more critical to home comfort and energy savings.

In today’s age of rising heating costs, a homeowner should be looking to insulate their attic floor with at least R-60 of thermal resistance. This would translate into layering the floor space with 18-20 inches of fiberglass pink batt insulation, or filling the area with 22-24 inches of Atticat blowing wool.

Insulating, or adding insulation to a home’s attic space is a very do it yourself project, with the greatest challenge to success being your ability to manoeuvre up through the ceiling’s 22 x 30 inch attic hatch. If you’re capable of achieving this semi acrobatic feat, have your local building supply dealer deliver a sheet of 5/8 inch spruce plywood (cut in half, providing two pieces of 2’ x 8’ walking planks) along with the insulation. The 5/8” plywood, placed diagonally or perpendicular to the truss joists, will allow you to safely navigate the attic floor, in order to place the batts or blow in the wool.

Don’t omit the plywood or skimp on a thinner sheeting. Sure footing is key to the success of any operation. With the truss joists providing 1-1/2 inches of footing, spaced at every 24 inches on center, while being somewhat hidden by any existing insulation, the chances of a fellow’s eligibility in entering a gender neutral washroom facility, increases twofold with every attempted step. Plus, the plywood can be further ripped into 12 inch strips, providing excellent shelving, or be used to create a deeper shaft around your attic hatch.

Before insulating, ensure that there are attic vents (24” x 48” raised foam shields) stapled and fitted in between each truss, that stretch down into the soffit. These vents are essential in preventing the insulation from blocking the cool air from being drawn up into the attic space.

Finally, invest in a sheet of 2 inch ridged insulation, then cut it to size and glue the pieces to the back of your attic hatch door, effectively insulating this last cold spot.

Good building.

As published by the Standard-Freeholder
Handyman's Hints Standard-Freeholder Cornwall Ontario by Chris Emard

What to dew

Properly insulating your home can reduce the amount of energy you use and save you money. Postmedia Network

Back in the olden days, when energy was cheap, the Habs were winning Stanley Cups, and our knee joints were well-oiled and pain-free, batt insulation was all we needed to keep our homes relatively cozy inside.

Then came the term “thermal bridging”, which enlightened us to the fact that lumber isn’t all that good an insulator. And, considering wall designs featured a stud at every 16 inches on center, the overall R-value of the wall was reduced significantly. A typical wall assembly would have contained either an R-12 or R-20 batt of insulation, depending on whether the wall had been framed with 2×4 or 2×6 lumber. The weakness in this system, energy wise, is the solid lumber, which accounts for about 10 per cent of the wall’s mass overall. With a thermal resistance value of about R-1 per inch, between every 15-1/2 inch span of warm, protective insulation, you had 1-1/2 inches of solid wood that would effectively allow the cold to migrate through to the inside, hence the term “thermal bridge”.

So, how can we as homeowners, and home builders, reduce the cold thermal bridge inadvertently created by the wood studding? The answer is Johns Manville’s polyiso ridged insulation board. With a thermal value of R-6 per inch, polyiso ridged sheeting can be installed directly over the wall studs, or over the OSB (oriented strand board) or plywood sheeting. The JM polyiso board is not a structural sheeting, therefore, a stud wall would have to be re-enforced with steel bracing if it were to be nailed directly to the lumber.

How thick should a homeowner consider going with their JM polyiso? Minimally 1 inch, with a 1-1/2 inch sheeting being better, and a 2 inch ridged board better yet.
Essentially, with the cost of heating being what it is, there’s no such thing as over-insulating an exterior wall. Therefore, a standard wall assembly in 2017 would begin with drywall on the inside, then a 6 mil. vapour barrier, wood studding with batt insulation in between, then a plywood sheeting, followed by JM polyiso, then a house wrap, ending with the customer’s choice of siding overtop. The 6 mil polyethylene vapour barrier is always installed on the warm side of a wall assembly, and effectively stops heat and moisture from entering the wall system.

Many people question why a plastic vapour barrier couldn’t be installed on the outside of an exterior wall as well. Or, be installed on the outside only, since that’s the side that faces the elements, and is the most likely side to let water in. Two elements dictate why we install a plastic vapour barrier on the inside wall only — our colder weather conditions, and the resulting dew point. In a perfect world, with a dry and air tight exterior wall cavity, having a vapour barrier on both sides would be the perfect scenario. Unfortunately, we can’t build a home in the same way we build a fridge, or beer cooler, at least not yet anyway. So, moisture already in the wall assembly, or entering the wall cavity by some other means, has got to be able to escape somewhere. In our Canadian climate, that’s best accomplished by having moisture dissipate towards the exterior.

Without a vapour barrier on the inside wall, heat and moisture would get into the insulation, then hit the dew point (the line where warm meets cold) somewhere in between the studs. An ice mass would then develop in the insulation, killing it’s thermal value, while creating all kinds of mold issues once things thawed out in the spring.

Installing a JM polyiso creates a band of continual insulation, and moves the dew point to about half way into its foam core, well out of the wall cavity. As a result, the thicker the JM ridged foam board, the further cold is kept from the home, and that’s a good thing.

Good building.

As published by the Standard-Freeholder
Handyman's Hints Standard-Freeholder Cornwall Ontario by Chris Emard

Rock cousins

Today we’re talking brands of insulation, and where it should be installed in the home.

There are basically two kinds, or more common types of batt insulation used in the exterior walls of most homes, them being fiberglass and mineral wool.

Fiberglass batts, such as Owens Corning’s pink insulation, is not so surprisingly, made of woven fibers of glass. Mineral wool, also referred to as rock wool, is made of crushed volcanic rock, steel slag, and other bonding agents.

The most popular mineral wool insulation in today’s market is a product made by the Roxul Company. The Roxul name has become so recognized by homeowners and contractors alike, that people never specifically request a mineral wool insulation, but will simply ask for “Roxul” instead.

Is there a difference between a fiberglass and rock wool product? And, is one better than the other? Material wise, the pink insulation is made of glass, which comes from sand, whereby mineral wool is derived from crushed rock. So, these products are pretty close cousins.

Consistency wise, fiberglass pink is kind of like day old spaghetti, while Roxul has a density similar to toast. As a result, the pink fiberglass is somewhat stringy, and a little more difficult to cut. Plus, the glass fibers can break apart a bit if the material is over andled, which will cause an itchy reaction if you’ve made the mistake of not wearing pants, a long sleeve shirt, gloves, goggles, and a dust mask.

Roxul, on the other hand, cuts like . . . well toast, making it an easy product to fit around electrical outlets and ductwork. Roxul, like toast, is crumbly, or rather, a little more dusty than fiberglass. So again, completely covering your body with clothing, along with goggles and a dust mask, are all required equipment.

Choosing one over the other depends primarily on whether you like the Owens Corning Pink Panther logo, which for some may rekindle thoughts of the mischievous cartoon character, and some of the classic Inspector Clouseau movies starring Peter Sellers. Or, if you’re a fan of home repair reality television, whereby Roxul is certainly the favored batt product of the celebrity carpenters (Roxul must be feeding these guys all the insulation they can butter).

Price wise, fiberglass pink is significantly cheaper than Roxul. This could be due to actual costs of manufacturing, or the fact it costs a few more bucks to feed Mike Holmes, than it does paying royalties to MGM Studios.

Product wise, both are used primarily as insulation in the exterior walls of residential homes. Roxul has the added bonus of being fireproof, whereby a Roxul booth at a typical home and trade show will usually have the rather impressive feature of a piece of Roxul being blasted by a direct flame of heat. Regardless, after a total and complete loss to fire, never has a home been found with a pile of Roxul sitting amongst the rubble. In other words, you put enough heat on something, it’s going to burn, or melt. However, timing is everything when it comes to a fire in the home, whereby if the flame spread can be delayed by even a minute or two, lives can be spared. As a result, Roxul is a popular choice to use in walls separating the garage from the house, or in the floors of a home, separating the basement from the living space above. Fiberglass pink can also be used in this manner, with glass obviously having a relatively high threshold to heat. However, fiberglass pink doesn’t advertise itself as fireproof, and is primarily marketed for its value as an insulation. Besides being an essential product for the exterior wall, and an effective barrier to flame spread, insulation can be an excellent sound barrier. So, be sure to consider it for bathroom and bedroom dividing walls if you’re going to be building a new home or renovating this spring.

Good building.

As published by the Standard-Freeholder
Handyman's Hints Standard-Freeholder Cornwall Ontario by Chris Emard