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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. 

  • 1 - 18 of 72 Posts

How do you run ducts for heating and cooling with slab on grade construction?

Posted by Kurt Piemonte April 24, 2025 Slab on Grade 1 response

Can I connect a new slab addition to an existing (engineered) slab on grade?

Posted by Corey Porteous April 9, 2025 Slab on Grade 1 response

What are the best below grade drainage layers for a slab on grade foundation?

Posted by stephan prystanski April 7, 2025 Slab on Grade 1 response

What's the ideal concrete thickness for concrete slab floors?

Posted by Abdulkadir Al-Jazari March 28, 2025 Basements

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What is the proper way to build a Slab on Grade Foundation?

Posted by John Schureman March 25, 2025 Slab on Grade 3 responses

How much perimeter skirt insulation should go around a concrete slab?

Posted by Insinuendo Insinuendo Aug. 5, 2022 Slab on Grade 3 responses

What are the best practices for a pier foundation on sloped bedrock?

Posted by s w July 12, 2022 New foundations and slab-on-grade 1 response

What is the minimum insulation value for insulation between the edge of the slab and foundation wall?

Posted by Arsh Deep July 12, 2022 Slab on Grade 1 response

Can moisture from the sand and aggregate under a slab cause rising damp?

Posted by Frederick Beggy June 9, 2022 Slab on Grade 3 responses

Will air heated floors work in a northern climate?

Posted by Matthew holmes March 22, 2022 Slab on Grade 1 response

Does ground under exposed concrete have a deeper or shallower frostline?

Posted by scott wanks March 3, 2022 Slab on Grade 5 responses

Can we backfill a basement and then do slab on grade?

Posted by susannahandjared mcisaac March 3, 2022 Slab on Grade 1 response

What maintenance needs to be done on a slab on grade foundation?

Posted by Diane Arsenault March 1, 2022 Slab on Grade 1 response

Can you build slab on grade as an extension on an existing house with a crawlspace?

Posted by Lana Mcgeary Jan. 19, 2022 Slab on Grade 2 responses

How would you do a Slab on Grade with a post and beam garage in New Hampshire?

Posted by Robert Nordman Jan. 19, 2022 Slab on Grade 1 response

What are the pros and cons of building a house on a slab on grade foundation?

Posted by Debra Kroening Jan. 5, 2022 New foundations and slab-on-grade 6 responses

How do you attach steps to slab on grade insulation?

Posted by Mary Alm Dec. 2, 2021 Slab on Grade 3 responses

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

Posted by Earl Williams Nov. 30, 2021 Slab on Grade 3 responses
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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.

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