If you’re planning to build a new house, it is important to do your research on more than just the home’s aesthetics and consider the different foundation options to prevent costly waterproofing problems down the line in your basement or crawl space. Home foundation types should be evaluated prior to construction to maximize the project’s timeline and manage homeowners’ long-term maintenance expectations.

This blog post will help homebuilders and homeowners alike to understand the typical crawl space and basement foundation methods, including poured concrete and CMU foundations, and learn why Insulated Concrete Forms (ICFs) are the preferred alternative.

Home Foundation Types

In residential construction, concrete foundations are common, but there are numerous methods to building them. A conventional concrete foundation can be achieved through a block foundation or a poured foundation, also known as cast-in-place. These options for building basements and crawlspaces have their downsides though.

Block Foundation

A concrete block foundation or concrete block basement involves stacking cinder blocks to create the structural basis of the home. These CMU blocks typically require a parge coat be applied to the exterior surface, so there is a smooth monolithic surface for the waterproofing membrane to be applied to.

CMUs are porous and therefore require exterior waterproofing to prevent crawl space or basement leaks. Additional interior insulation is also necessary to keep these areas comfortable, as air leakage through the below-grade walls is an easy way to decrease a home’s energy efficiency and raise heating and cooling costs. Note that improper installation can also trap moisture between the insulation and foundation wall, leading to mold growth.

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