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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 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

How should I insulate under a concrete hydronic slab on stilts?

Posted by Cam Smith Feb. 6, 2021, 12:21 p.m. Foundation choices 1 Responses

With a raised house how should I insulate underneath?

Posted by Kevin Marmillion Feb. 1, 2021, 11:43 a.m. Basements improvements 3 Responses

Have you excavated under one of your slabs middle of winter?

Posted by Mike Kolder Jan. 31, 2021, 2:31 p.m. Slab on Grade 1 Responses

What is the best way to do exterior foundation styrofoam finishing?

Posted by Castor River Farm Jan. 31, 2021, 12:56 p.m. New foundations and slab-on-grade 1 Responses

What is the best way to finish basement walls?

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

Why is there condensation above ground on an interior basement wall?

Posted by Barb Daluisio Jan. 12, 2021, 1:26 p.m. Basements improvements 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.