Do I use spray foam that hardens or pink insulation in the gap of cold blowing air coming out from my baseboards? Adding quarter round soon

Asked by Max's Mom
White Plains, NY

I need to take care of this problem asap even though it is March in New York. What is the quickest and best way to seal these boards before I add my painted quarter round? Can it also be "green" or because it's hidden behind wood, it does not matter?


Sean Lintow Sr

Answered by Sean Lintow Sr

Naperville, IL

SLS Construction & Building Solutions

March 4, 2014

Well you may be able to theoretically caulk to block the air leak in that area, it would be better to stop the origin of the leak altogether. Unfortunately we are also missing some much needed information like just what the floor material is. The best method is to carefully remove the baseboards & seal the sill plate to the subfloor. If you have carpet it can be pushed back with a putty knife so that you can get caulk in that area. If you have hardwood floors you have to be very careful as they need room to expand & contract - if you fill the entire gap up you will have problems. The next area to look at is the drywall to framing area & caulking that area. Then you can reinstall the baseboard & if you like, add the quarter round. Unless you have vinyl sheet goods, you should not caulk the baseboard or quarter round to the finish flooring. At no time should you use fiberglass (which does not really stop airflow anyways) or spray in foam in this area. As for green, I guess that depends on what your definition is - there are some good low VOC materials on the market, but the most important thing (unless you are chemically sensitive) is to use a material that will last, expand & contract as needed, and stay in place.

Tagged In: spray foam, green insulation

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