How to Save Energy at Home; Repair and Seal Non-Structural Foundation Cracks

Sealing foundation cracks can help save energy.

Many building foundations develop non-structural cracks, often caused when the building settles into the ground below and around it. Usually, these cracks do not pose any threat that the building will collapse, but they sometimes allow the outside elements to infiltrate to the inside, resulting in added energy costs to mitigate cold, hot or humid air or moisture and dampness.
Analysis of foundation cracks:
First of all, this article does not teach you how to know whether or not a foundation crack is structural in nature. In order to determine that, you might need to hire a structural professional.

This article only discusses a means to seal non-structural foundation cracks, in an attempt to minimize outside element infiltration to the inside of your home.

Note that the following steps should be done on the inside and the outside of the foundation, where accessible.

Once you have determined that your foundation cracks are not structural in nature, follow these steps to make repairs and seal them.

Procure products, tools, and equipment:
You will need the following items to repair and seal non-structural foundation cracks. Most items are available at home centers and hardware stores.

o Hydraulic cement -- needed if cracks are wide, and/or if water is leaking through. Note: if water is leaking in, you probably should call that structural professional, just to be sure the water pressure outside is not applying dangerous exertion against the foundation.
o Caulking -- look for special caulking intended for concrete repairs.
o Foam backer-rod -- if cracks are fairly deep, backer-rod helps fill it prior to caulking.
o Caulking gun -- get one that is durable and strong.
o Small and large putty knives
o Cold chisel
o Hammer
o Wire brush
o Protective clothing, gear etc., as recommended by manufacturers of tools, products and equipment.

Start by cleaning out the non-structural cracks using a hammer and a cold chisel.

You will want to remove any crumbling, soft or loose pieces of the foundation material, especially near the edges of the cracks.