EPS / Discussions

What's the difference between EPS and GPS insulation?

...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 page about choos...

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

What is the best way to insulate rim joists with EPS and batts?

...EPS pieces againt rim joists/cripple wall cavities and build it out to EPS mounted against foundation wall. 2) Single EPS pieces flush against rim joist, hori...

Posted by Steve J July 18, 2019, 3:53 p.m. Basements improvements 1 Responses

Can Rockwool be installed over Type II EPS?

...EPS. Tyvek, siding. I intend to remove the EPS and install a self-adhering WRB on the plywood. Since I have the EPS will I create any problems if I re-install i...

Posted by Brian Bonnell March 30, 2020, 11:04 a.m. Wall assemblies - renovation 1 Responses

How thick should EPS foam insulation on basement walls be?

I'm researching about what type of rigid insulation to use when finishing my basement. I was on a website of an eps insulation manufacturer and under their tec...

Posted by Derrick R March 17, 2021, 9:13 p.m. Insulation and soundproofing 3 Responses

Is it OK to put 1 inch of EPS under vinyl siding with no wall insulation?

...EPS under floors. Walls have no insulation, siding is T-1-11 from the sixties would like to put 1 inch EPS under vinyl siding. the building is pretty well bui...

Posted by Roger Smith Nov. 12, 2019, 6:34 a.m. Wall assemblies - renovation 7 Responses

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

...EPS & XPS Foam Insulation & Styrofoam We always choose (and recommend) EPS over XPS due to the fact that XPS has much higher greenhouse gas emissions than EPS...

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

Can you add exterior rigid foam insulation (e.g. EPS) with replacing windows?

We are contemplating an energy retrofit to several 1960's chalet style cabins in Northern VT. Budget matters and the windows of the cabins are in reasonably de...

Posted by Peter Milliken Nov. 9, 2020, 9:13 a.m. Wall assemblies - renovation 0 Responses

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

...EPS. Is that a danger? Among the many possible ways to protect against that doesn't involve insecticides that might leach into the soil is a copper foil sheath ...

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

Heco topix screws - which type should be used for attaching insulation outside a house?

Attaching battens through 4" EPS foam external insulation, should Therm Insulation or Stainless screws be used? Is it necessary to have the double thread desig...

Posted by Mike Taylor April 7, 2020, 4:45 p.m. Materials and resources 2 Responses

Basement reno - How do I effectively insulate my basement?

...EPS + Drywall? or Just sandwich+seal EPS panels to build it up to the foundation wall insulation? Specific order: After gluing the EPS against the concret...

Posted by Steve J Feb. 13, 2019, 10:25 p.m. Foundation and basement improvements 2 Responses

Can basement walls to dry to the inside with foam board?

I'm planning to install and seal 2 inch eps foamboard to my basement foundation walls. From all of my reading it says that your basement foundation walls can o...

Posted by Tim Hanrahan Aug. 20, 2020, 12:34 a.m. Basements improvements 6 Responses

What do I in my basement where new insulation meets old?

...EPS) How do address the areas where the EPS is adjacent to the old insulation? If I demo the laundry room and continue with eps, how do I address insulation...

Posted by Steve J July 20, 2019, 10:01 p.m. Basements improvements 2 Responses

Can you run plumbing in exterior walls?

...EPS + wood stud + mineral wool? The interior basement walls have been insulated with 2" of EPS (R-10) and then wood studs constructed against the eps and fill...

Posted by Steve J Feb. 22, 2021, 10:28 p.m. Plumbing and water heaters 1 Responses

What is the best way to insulate a Multi-material wall?

...EPS? I am planning on insulating my Cold Room (area below my porch), similarly to the rest of my basement (2" EPS+stud/mineral wool batts) and condition it wi...

Posted by Steve J Sept. 29, 2020, 10:15 a.m. Wall assemblies - renovation 7 Responses

Is a vapor barrier necessary under a concrete slab with foam insulation and if so, where does go?

We're soon building a slab on grade foundation for our new cabin in Montana and I've decided to sit it on a 4" EPS foam insulation so the slab will retain some...

Posted by Grady 22 Aug. 17, 2019, 12:19 p.m. Air and vapour barriers 3 Responses

What is the best way to insulate the basement of an old house?

...EPS then bats. Thanks for your help! Bryan If you’ve read our basement articles then you know we think EPS and Rockwool are both great options for basements...

Posted by Bryan Squirrell Jan. 14, 2020, 7:59 p.m. Basements improvements 1 Responses

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

...EPS foam under footings and a skirt of R8 insulation extending out 4 feet. ARe these suitable for such conditions. Have these materials been tested to see if th...

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

Can I reclaim old triple slider windows?

...EPS foam, and achive better results than buying all new windows for a fraction of the cost? We have a ton of trees around the house so there is virtually no s...

Posted by Keanan Toews Jan. 20, 2019, 1:01 p.m. Windows and doors 1 Responses