Foil / Discussions

Can you put foil covered foam panels inside a framed wall?

...foil based rigid foam panels may be EPS, but they also may be polyisocyanurate insulation. Do you know which they are? This page here can help you identify them...

Posted by William Mc Feb. 22, 2021, 12:38 p.m. Insulation and soundproofing 3 Responses

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

...foil face would be good, may not be breathable...might be better to just do eps board and buy attic foil to put over that .....this might be the cheapest way to...

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

Where can i buy hemp batt insulation in Western Canada?

...foil tape with hemp insulation in the van? Thanks Jen Non-toxic natural building materials like hemp are a great way to safeguard your indoor air quality if...

Posted by Jen Moffat Aug. 14, 2020, 11:14 p.m. Insulation and soundproofing 4 Responses

Protection from Insects for Legalett Geo-passive super insulated slab on grade?

...foil sheath around the outside of the foundation. Are insect infestations in the EPS a possible danger? Thanks, James.

Posted by James Burns April 30, 2020, 11:11 a.m. Slab on Grade 0 Responses

How do you insulate exterior walls if a tiny house?

...foil faced? And can i also use 1/2" formular between the studs on the interior along with my fiberglass insulation? Would I need to peel off a little bit of the...

Posted by John Boy Feb. 23, 2021, 10:21 a.m. Insulation and soundproofing 0 Responses

What is the best way to insulate a concrete block house?

...foil bubble wrap will for sure act as a vapor barrier, but that should only be installed in a cold climate, so I’m assuming you’re a bit to the north. Foil wi...

Posted by kent wardecke Oct. 17, 2020, 11 a.m. Foundation and basement improvements 2 Responses

Do I need a standard 6 mil poly vapor barrier with dense cellulose exterior wall?

...foil faced foam board is not completly tight against the underlying shingles and I assume does allow for some air movement underneath it and the vinyl siding. ...

Posted by jeff Chormann May 1, 2020, 9:18 a.m. Air and vapour barriers 2 Responses

How do you insulate concrete basement walls and avoid mould?

...foil faced foam board over top? If so, the foil is acting as a vapor barrier and preventing moisture from escaping. The beauty of Rockwool Mineral wool insulati...

Posted by William Hunter Feb. 22, 2021, 11:40 a.m. Basements improvements 2 Responses

Does strapping’s nailing jeopardize membrane integrity?

...foil vapor barrier), double 1×3 strapping and v-groove pine planks. – walls are cedar siding, 1×3 strapping, Typar WRB, 1-1/2” wood fiberboard, R-20 hemp batt i...

Posted by GUY DUPONT Nov. 26, 2021, 11:12 p.m. Air and vapour barriers 3 Responses

How can I insulated the outside walls of a workshop without doing harm?

...foil clad ISO and vinyl siding to add R13, should I be concerned about moisture? What else should I be considering, beside a more economical heat source? Than...

Posted by Charley Nelson Aug. 27, 2021, 9:28 a.m. Wall assemblies - renovation 3 Responses

Can you spray foam a house from the outside?

...foil directly under the siding. Someone recommended removing the sheathing and doing spray foam from the outside. It seems we could also drill holes and blow sp...

Posted by Joan Lawrence July 11, 2019, 7:17 p.m. Wall assemblies - renovation 3 Responses

Can you provide Crawlspace Insulation Design Assistance?

...foil you speak of? Typically the ‘breathable’ vapor barrier / vapor retarder products are a poly, foil is among the least permeable materials, I just want to ma...

Posted by Randy Christensen Dec. 10, 2019, 12:17 p.m. Crawl spaces 1 Responses

How do you stop wind from blowing under a house on piers?

...foil faced foam board nailed to the bottom of the floor joists. I have not removed this insulation. Is this a problem waiting to rear it's ugly head? Protecting...

Posted by Robert Boyle Oct. 17, 2021, 12:11 a.m. Foundation and basement improvements 1 Responses

Is EPS or XPS better for use in basement rim joists? Should faced or unfaced foam boards be used?

...foil membrane then it is even less permeable that XPS, because the foil itself is a vapour barrier. See this page all about rigid insulation panels - The diff...

Posted by Thomas Dispenza Sept. 8, 2019, 12:43 a.m. Basements improvements 6 Responses

Can you put hemp insulation in an attic?

...foil barrier you could lay it right on top. I just don’t imagine the foil will do much for stopping air leakage (if that’s what you have) and unless you have an...

Posted by Pamella Weatherly-Phillips Aug. 16, 2019, 11:49 a.m. Roof assemblies - renovation 1 Responses

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

...foil membrane on each side to contain the gases, and that foil is a vapor barrier . Using it on the outside means you are installing an exterior vapour barrie...

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

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

...foil is going to be more breathable than say, EPS with un-perforated foil, but a breathable house wrap and Rockwool is still a safer route. I wouldn’t worry a...

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

What type of Insulation can I use on the exterior of my home?

...foil on the outside would not serve you well. Yes, it would be a vapor barrier , and you don’t want that on the outside. And a foil membrane hardly offers any t...

Posted by Scott Muller April 18, 2019, 2:19 p.m. Wall assemblies - renovation 6 Responses