Roxul / Discussions

Why is there condensation in between 1.5" polyiso board and roxul insulation?

...Roxul insulation Batts I went to go do some electrical work today and pulled back a bath and noticed that there was a bunch of condensation and a little bit of ...

Posted by Tyler Norrie Feb. 9, 2021, 2:32 p.m. Basements improvements 0 Responses

How do you finish the exterior of slab on grade?

...roxul that would be exposed after building the exterior walls. Just to be clear when you say the 'top of the Roxul', the top horizontal edge of the slab insulat...

Posted by Dave Derouin Oct. 18, 2018, 1:45 p.m. Slab on Grade 1 Responses

What is the best way to Insulate a basement and floor joists that are embedded into the concrete?

...roxul insulation in the ceiling space as sound proofing and the roxul/batt insulation is in the ceiling space right up against the exterior wall. Installing bat...

Posted by David Pereira April 28, 2020, 10:34 p.m. Foundation and basement improvements 2 Responses

What is the best approach to insulate the floor in a tiny home, built on a trailer?

...Roxul and technically called mineral wool) insulation is a good one. Here is a page to the best Tiny house we've seen, and it was insulated with Roxul batts, mo...

Posted by Dustin Hartwig May 28, 2020, 4:31 p.m. Tiny house 3 Responses

Do I need a vapour barrier in Ontario?

...Roxul R14, some walls are not. I plan on adding house wrap and insulation and siding on exterior soon. Do I need a vapour barrier on the interior warm side if I...

Posted by Gordon Harold April 22, 2021, 9:28 p.m. Air and vapour barriers 0 Responses

What is the best way to finish basement walls?

...roxul and drywall. Is this best approach given the rest of basement is done the old school way (incorrectly)? Thanks in advance your site is new to me and is a ...

Posted by Aram Scaram Jan. 21, 2021, 5:13 p.m. Basements improvements 3 Responses

How do I insulate my half below grade basement?

...roxul insulation to give around r24 (local code). This is expensive and I'm not 100% on board because the basement is half above grade. I have seen in the CMH...

Posted by tom mckeand Oct. 14, 2019, 11:01 p.m. Basements improvements 1 Responses

Should I densepack wall cavities prior to exterior insulation?

...roxul based on price, strapping, new siding. Is it worth densepacking the walls before doing the WRB? The kraft paper falling apart or separating from the ins...

Posted by Gordon McNair April 13, 2021, 9:21 a.m. Wall assemblies - renovation 3 Responses

How do you best use polyiso insulation in a basement?

...Roxul/rockwool insulation, NO poly vapor barrier & ½” gypsum drywall, sealed with drywall sealer and painted with vapor barrier paint. What problems do you se...

Posted by Iain Matheson Jan. 24, 2020, 7:45 p.m. Basements improvements 1 Responses

What is the perfect wall assembly?

...roxul comfortboard [...but I assume this is the ''cavityrock'' product line as I cannot find 4'' comfortboard in the offering.] I appreciate that 2 courses were...

Posted by Paul Drouin Sept. 17, 2020, 6:29 a.m. Wall assemblies - new construction 1 Responses

How do insulate the outside of a log home?

...Roxul insulation, horizontal strapping with 1x3s and then either vinyl siding or pre painted wood board and batten. My questions would be, do I need to have a a...

Posted by Michael Hickey Aug. 2, 2018, 6:03 p.m. Wall assemblies - renovation 1 Responses

Where does a vapour barrier go when building a shed in southern Ontario?

...roxul batts and the infamous 6 mil poly. The ceiling is R40 pink as I got a good deal, and figure if it cost the same as R24, may as well enjoy the ROI. I was g...

Posted by Charley Nelson Nov. 5, 2020, 10:09 a.m. Wall assemblies - new construction 1 Responses

What is the best method of building a slab on grade?

...Roxul does not and will not experience frost heave, It has a perimeter skirt to protect it. The Rockwool insulation will hold up fine over time as it is a miner...

Posted by Jay Law April 19, 2021, 3:09 p.m. Slab on Grade 1 Responses

In your Edelweiss house you use 2x6 studs. Why not use 2x4 studs and add 2" rigid on the inside?

8" semi rigid and 5 1/2" between the studs. why not use 8" semi rigid, 3 1/2" between the studs and 2 " more semi rigid on the inside beneath the gyprock? Is t...

Posted by Tom Wagar Aug. 25, 2019, 3:40 p.m. Wall assemblies - new construction 1 Responses

What is the best material to use for wall and roof insulation?

...Roxul), and dense packed cellulose . Very important along with which insulation you choose is proper installation to make sure it lasts. To that end, I would ...

Posted by Babak K July 12, 2020, 8:43 p.m. Insulation and soundproofing 1 Responses

Do you have an updated recommendation for attaching exterior mineral wool insulation?

Do you have an updated recommendation for attaching exterior mineral wool you built a few years ago? The way we attached mineral wool insulation on the LEED Pl...

Posted by Fred D Aug. 31, 2020, 1:07 p.m. Wall assemblies - new construction 1 Responses

What is the best way to insulate a 2x8 wall?

...Roxul), is very permeable to moisture so while it isn’t the cheapest, it is the most foolproof as it won’t ever trap moisture like some foam insulation can. S...

Posted by Michael Sweglar July 8, 2020, 10:43 a.m. Wall assemblies - new construction 3 Responses

Which type of exterior insulation to use on a house?

...Roxul or Rockwool). We like it for the very reasons you mention, that it isn’t harmed by moisture and it lets moisture pass right through it. Here is the page y...

Posted by Trevor Marshand May 26, 2020, 1:16 p.m. Insulation and soundproofing 1 Responses