Kneewall Insulation


One of the most common complaints we get from prospective homeowners is that they can never keep their upstairs, or most commonly, their bonus room, properly heated and cooled. In fact, several homeowners we speak to claim their upstairs is often 7-12 degrees hotter or cooler than the downstairs.

One other thing these homeowners have in common is that they have called multiple HVAC companies to come out to fix their problem, and no matter what they do (increase supply, add duct work, etc.) their problem still persists.

The reason for this is that more often than not, it is not related to your HVAC system at all. Instead, it is directly linked to the short kneewalls that homes built today often have, and the ineffective insulation behind them.

As we discuss previously, there are three types of heat flow: conductive, convective, and radiant. Fiberglass insulation which is most commonly present due to local building codes, only covers conductive and convective heat flow. Unfortunately, it does nothing for radiant heat flow.

So what happens, you ask? The conditioned room adjacent to the kneewall will heat up excessively in the summer and drop in temperature compared to the rest of the home in the winter.

There is an instant solution to this problem, but it does not include anything having to do with your heating and cooling system.

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The Home Energy Solution

In order to properly solve the issue of heat radiating through the walls to your home's living space, air flow must be blocked completely. We do this by adhering a solid substrate, better known as rigid foam board to the back side of the kneewall and sealing its seams and perimeter. Once this air flow is blocked your room's temperature will level out to the rest of the home almost immediately.

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