ICF / Discussions

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

Unisulated footing under ICF walls allows thermal bridging into the concrete core of the wall allowing energy stored in the thermal mass to bleed into the soil...

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

Could we use a raft slab with ICF walls on a sloped site?

...ICFs in lieu of the tires that Mike Renolds advocates, as I am 73 yrs old and stacking and filling hundreds of used tires is WAY beyond my capabilities. I guess...

Posted by Paul Fischer Sept. 15, 2020, 2:21 p.m. Slab on Grade 1 Responses

How much insulation do you need for a Basement floor in an ICF home?

...ICF for the below grade basement and the main floor as well. Do I need to do any extra insulation in the basement on the concrete floor? You will for sure need ...

Posted by Gary Abbott Nov. 23, 2020, 1:36 p.m. Basements 1 Responses

Are Insulated Concrete Forms and Gigacrete panels good?

...ICF and Passive house, I would suggest having a look at ThermalWall, a rigid insulation panel designed to attach to ICF blocks (above or below grade) that can h...

Posted by Dallin Sumpter Feb. 21, 2019, 2:46 a.m. Wall assemblies - new construction 5 Responses

What is a thermal break solution at a door threshold?

...ICF blocks serving as a frost wall. Our exterior above grade walls will also be ICF with the addition of 3.5" of EPS panels on the exterior. We will have a conc...

Posted by Shaun B Sept. 13, 2020, 6:31 a.m. Slab on Grade 2 Responses

What is your experience and thoughts on pre-fab wall assemblies?

I'm evaluating several wall construction methods like ICF, Double stud wall, and pre-built wall assemblies. What can you tell me about your experience with pre...

Posted by Shaun B Nov. 12, 2019, 4:16 p.m. Wall assemblies - new construction 2 Responses

Can you install electric wire in floor heat cables and cork flooring?

...ICF frost wall with 4 inches of rigid insulation giving me R20 laid over the vapour barrier, then Ouellet OWC-M series electrical heating cable laid under 4inch...

Posted by C Whitby Aug. 7, 2020, 6:43 p.m. Flooring and stairs 2 Responses

Can you elevate a slab on grade foundation?

...ICF foundation, going down below frost level (4ft. Up north) a better route? Or do you suggest something altogether different? Keeping in mind I'm trying to b...

Posted by Raoul Lions July 27, 2019, 2:47 p.m. Slab on Grade 4 Responses

Is hydronic slab heat appropriate in a super insulated home?

...ICF walls and an appropriate level of insulation in the roof and slab. I'm taking inspiration from Passive House but not pursuing the official certification. We...

Posted by Andrew Wright Feb. 3, 2021, 3:26 p.m. Delivery: radiant, forced-air and decentralized 1 Responses

Should I replace my geothermal system with a gas boiler?

...ICF walls basement to roof, infloor heating in basement, geothermal heating (closed loop, 6 wells 200 ft deep), triple E argon windows, R50 attic insulation, et...

Posted by Lawrence Brusnyk Oct. 31, 2018, 8:07 p.m. Heat pumps, geothermal and AC 1 Responses

Have you heard of Gigacrete and is it any good?

Do you have any reviews or suggestions for Gigacrete homes? They seem eco-friendly with a tight building envelope. There's just not much info out there. Hi Sas...

Posted by Sasha P Aug. 29, 2019, 4:21 p.m. Wall assemblies - new construction 3 Responses

Are slab on grade foundations cheaper than a basement?

...ICF hybrid to avoid some hidden costs, see our page about raft slabs for poor soil quality here . But where near Portland, is it urban or country? What type of ...

Posted by Jason Nov. 21, 2019, 4:12 p.m. New foundations and slab-on-grade 1 Responses

What do you think of Legalett Wall Insulation?

...ICF basements but they are perfect for exterior Insulation These are panels that come in 4x8 sheets up to 8 inches thick with a metal rail in the middle to secu...

Posted by Igal H Aug. 19, 2020, 3:52 p.m. Walls and Roofs 1 Responses

Is there a concrete admixture to prevent water leaks?

...ICF foundation a new building :) We are going to waterproof the concrete. But wonder if we should add additive as the last defence

Posted by Frank Liu July 4, 2020, 6:03 p.m. Waterproofing and drainage 2 Responses

How do you choose between a basement or slab on grade?

...ICF Foundation wall on it, leaving you with a basement thoroughly insulated with no thermal bridging and a reduced chance of mold forming compared to standard b...

Posted by A. Delmas May 21, 2020, 8:59 p.m. Foundation choices 1 Responses

What are the factors I should consider for choosing between a slab on grade and basement?

...ICF advocates (insulated concrete forms) that would argue in favour of basements, including bottom to top ICF walls; those builders would argue there isn’t a gr...

Posted by Shaun B April 2, 2019, 6:35 a.m. Slab on Grade 3 Responses

What is the best way to build a slab foundation on a slope?

...ICF knee wall. Then pour the next one, the next retaining wall /knee wall, and again the next slab, so it could be a long and labour intensive procedure. Each s...

Posted by keri gelenian Nov. 23, 2020, 6:32 p.m. Foundation choices 2 Responses

Has anyone insulated under a swimming pool?

...ICF Blocks (Insulated Concrete Forms), which not only creates the structure, it keeps the heat where you want it – in the water and not in the ground below.

Posted by Randy Parent May 10, 2021, 8:28 p.m. Natural swimming pools and ponds 1 Responses