R value / Discussions

Building a Honka log “pretty good house” planning - thoughts on hvac, ventilation and roof

...rch either from the category menu or in the search bar. From there if you have questions we can for sure help, just try to break them up so they are easier to a...

Posted by Klemen Novak June 28, 2020, 1:55 a.m. Planning and Design 1 Responses

What kind of foam board should I use to insulate rim joists in Wisconsin?

...rs) It seems that XPS would be the alternative but I'm concerned with fire code rating. While XPS has a lower fire spread rating its not suitable for exposed in...

Posted by Matt Kime Sept. 12, 2021, 10:31 p.m. Basements improvements 1 Responses

What is the best way to insulate a 1930s brick house from the outside?

...rt here – How to insulate older homes from the outside to improve energy efficiency. A lot of Toronto homes are fairly close together and sometimes there is...

Posted by Stephane Marcotte Sept. 2, 2021, 2:42 p.m. Wall assemblies - renovation 2 Responses

Do I need to insulate under the footings of a frost protected shallow foundation?

...rizontal insulation required (distance increased from 12″ to 63″ and R-value from 1.7 to 11.4.) That seems like overkill as there will still be heat transfer fr...

Posted by Jon Piana April 15, 2019, 8:45 a.m. Slab on Grade 1 Responses

Combo structural sheathing, WRB and thin insulation panel in Ontario?

...R4-R5 foam component, and a water-resistive barrier coating or layer incorporated into it, eliminating the need for an additional house-wrap: Barricade Thermo B...

Posted by Steve Bull Jan. 14, 2020, 6:06 p.m. Walls and Roofs 3 Responses

Can you create a passive wine cellar by insulating and air sealing a crawl space?

...r. Thank you for your answer. "Are your wood studs directly against the concrete wall?" I'm not sure what you are referring to. There are no concrete walls; o...

Posted by JC Wong April 2, 2021, 6:50 p.m. Crawl spaces 5 Responses

What type of insulation should I use ?

...r an air barrier as well as vapor barrier / vapor retarder, see here the difference between air barriers and vapor barriers.

Posted by Dawn Wood Feb. 5, 2021, 12:02 a.m. Insulation and soundproofing 1 Responses

Can you use polyiso insulation on the exterior of a wall behind cedar siding on the west coast?

...r different applications You will read in that article a bit more about the ‘thermal drift’ as the R value and thermal protection is reduced during very cold ...

Posted by Iain Matheson Jan. 28, 2020, 10:38 p.m. Wall assemblies - renovation 2 Responses

What is the best foam board insulation under drywall?

...rior as you plan, it has a built-in vapor barrier with the foil barriers on either side. So you wouldn’t need to add a 6-mil vapor barrier afterwards, you just ...

Posted by Wesley Pracht Jan. 11, 2020, 8:10 p.m. Wall assemblies - renovation 1 Responses

How much insulation should I install underneath my concrete slab in my basement?

...r XPS. I read xps is superior to eps - less water absorption, higher r value, longer retention of its insulation properties over many years. What are your thoug...

Posted by Scott Antonation Sept. 27, 2019, 1:06 a.m. Slab on Grade 3 Responses

What's the difference between EPS and GPS insulation?

...re you would use EPS rigid foam insulation. EPS is typically rated at abou R4 per inch where GPS is typically rated as having R5 insulating value. Here is our...

Posted by Ronald Tetrault Feb. 3, 2021, 5:22 p.m. Insulation and soundproofing 1 Responses

What is the best to insulate metal structures for all seasons?

...r control layers (thermal barrier, air barrier, vapour control layer) on the exterior and simply follow the basic principles of building science for your climat...

Posted by Morgan Aldridge Jan. 19, 2019, 1:53 a.m. Wall assemblies - new construction 1 Responses

Do you have on a category on insulating vans?

...ry good air barrier, so you might want a separate membrane. There are two companies we know of that have switched to more environmentally friendly blowing age...

Posted by chantal fortier April 14, 2019, 2:08 p.m. Tiny house 1 Responses

Why is there condensation above ground on an interior basement wall?

...rm air in your basement and the concrete is cold do to the outside exposure it will create a dew point temperature differential. As you add the fiberglass you c...

Posted by Barb Daluisio Jan. 12, 2021, 1:26 p.m. Basements improvements 1 Responses

Which type of hot water pipe insulation is best?

...rs a better coefficient of thermal insulation (near R-4). If indoor air quality is a top priority for you, we would recommend you opt for the polyethylene foa...

Posted by Cooper Dec. 11, 2017, 2:36 p.m. Plumbing and water heaters 1 Responses

What is the best way to stop thermal bridging between my ICF walls and my footing?

...r ICF block wall, so both are integrated perfectly. And this is in no way a sacrifice in comfort, strength or efficiency, a raft slab design is stronger than ...

Posted by Walter van den Broek Sept. 18, 2020, 11:23 a.m. Foundation choices 1 Responses

If a passive house is designed well is it worth the extra cost for Low E window coatings?

...re appropriately facing south and the entire design is sound with thermal mass and good overhangs would double or triple glaze Argon filled windows be appropria...

Posted by Joe Van Kuren June 7, 2019, 8:37 p.m. Passive solar home design 1 Responses

What are your thoughts on using large flax straw bales (4x4) to build in Saskatchewan?

...re hard to find now. Large bales are cheap and more compact (need less or no precompression). And what about footings? There can be more risk of insects and rod...

Posted by Al Birchard Nov. 11, 2019, 12:56 p.m. Wall assemblies - new construction 3 Responses