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New foundations and slab-on-grade

The first step to Green home design and construction is deciding what sort of base you will rest it on. The Guide pages below help choose between slab-on-grade construction, traditional strip foundations with crawlspace and basement foundations - then show step by step how to build them better. 

Can you use Comfortboard mineral wool insulation as a skirt on monolithic slab?

Posted by Eric Sokol Oct. 16, 2021, 11:15 a.m. Slab on Grade 0 Responses

Insulation on interior or exterior of frost wall - or both - for floating slab?

Posted by Marc-Andre Roy Oct. 4, 2021, 9:20 a.m. Slab on Grade 5 Responses

What is causing my foundation wall to sweat?

Posted by Jason Duncan Oct. 1, 2021, 8:27 a.m. Basements improvements 1 Responses

What experience do you have with techno piles?

Posted by Rob DesBaillets Aug. 26, 2021, 8:49 p.m. New foundations and slab-on-grade 1 Responses

What is the best way to install slab on grade insulation?

Posted by paul fowler Aug. 26, 2021, 8:29 p.m. Slab on Grade 3 Responses

How to you build a raft slab foundation?

Posted by Kate Bottriell Aug. 19, 2021, 5:25 a.m. Slab on Grade 1 Responses

Can you jack up a cottage and build a slab on grade underneath it?

Posted by William Rae June 6, 2021, 12:23 p.m. Slab on Grade 3 Responses

Can you leave a Legalett slab in winter in Canada without the heat on?

Posted by Gamog Cladhaire April 29, 2021, 9:06 a.m. Slab on Grade 3 Responses

What thickness of insulation and concrete do you recommend in a floating slab?

Posted by Marc-Andre Roy April 21, 2021, 7:38 a.m. Slab on Grade 3 Responses

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

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

Will spray foam on basement walls prevent condensation?

Posted by Michael Scott April 12, 2021, 9:17 p.m. Basements improvements 3 Responses

Can I use a Legalett slab in Florida if I don't want floor heat?

Posted by Harry Dickinson March 25, 2021, 10:21 a.m. Slab on Grade 1 Responses

If the foundation wall has tyvek wrap will it trap moisture?

Posted by Hos Boss March 9, 2021, 4:42 p.m. Basements improvements 1 Responses

Why do you shim up basement walls?

Posted by t b March 2, 2021, 3:17 p.m. Basements improvements 4 Responses

How do you insulate concrete basement walls and avoid mould?

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

How do can I insulate an existing basement floor from 1906?

Posted by Cathy Gaskins Feb. 18, 2021, 11:24 a.m. Basements improvements 3 Responses

How do you determine the thickness of concrete for slab on grade construction?

Posted by Ackeem Beason Feb. 16, 2021, 2:46 a.m. Slab on Grade 1 Responses

About

New foundations and slab-on-grade

Traditionally in North America, home construction starts with a crawlspace or concrete basement foundation. Depending on the situation there are other options that can be more durable and affordable that will better protect your home air quality and energy efficiency - especially important for LEED, Passive House, ZNE or in the future Net Positive Energy homes.

The first factors to consider when designing the foundation of a home are lot size and soil conditions. When space is limited (with total footprint or height restrictions) a basement foundation may be the best option, but if space allows there is a strong case for avoiding basements altogether with a slab-on-grade foundation design.