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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. 

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

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?

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

What is a thermal break solution at a door threshold?

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

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

Posted by Tim Hanrahan Aug. 20, 2020, 12:34 a.m. Basements improvements 3 Responses

Can my shallow crawl space be converted to a slab foundation?

Posted by Sian O'Keefe Aug. 15, 2020, 12:52 p.m. Slab on Grade 1 Responses

Is it possible to do a mono pour if you have a covered porch?

Posted by Frank Gascon Aug. 10, 2020, 8:05 a.m. Slab on Grade 1 Responses

How would I detail the connection between the wall and floating slab?

Posted by Brendon Fraser July 17, 2020, 1:24 p.m. Slab on Grade 2 Responses

Can you add a screen/sun room and deck to a slab on grade?

Posted by Pierre Contant July 1, 2020, 10:55 a.m. Slab on Grade 2 Responses

How do you create a slab on grade on a slope?

Posted by Adrienne Rayna June 30, 2020, 3:58 p.m. New foundations and slab-on-grade 3 Responses

Where do you install a weeping tile with a high water table?

Posted by Alex Kesheshian June 11, 2020, 11:54 p.m. Foundations and Basements 1 Responses

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

Posted by Lisa Delmas May 21, 2020, 8:59 p.m. Foundation choices 0 Responses

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

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

How do you rebuild an existing basement?

Posted by Lisa Tuck April 14, 2020, 11:34 p.m. Basements improvements 1 Responses

Can you use spray foam Insulation under a slab?

Posted by Linda Martin April 6, 2020, 11:54 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.