We’ve been taught that heated air rises since we were kids. As a child, this piece of information does not have much significance.
That changes when you become a home owner and start paying the heating and cooling bills.
Research shows that that up to 10% of the air leakage from your home occurs through the attic and roof. While your air condition or furnace is pumping, an attic without high-quality insulation is letting a hefty percentage of that air or heat leak out.
This simple fact means it’s in your best interests to ensure the insulation in your attic creates the best air seal possible.
Existing Ranch and Cape Cod Style Homes
In an existing ranch or two-story home, you may want to just add more blown-in cellulose to what is already in the attic to at least bring it up to current energy codes or R38.
If you have a Cape Cod-style 1½ story house or a bonus room above the garage, you will want to spray your entire roof line with foam to ensure top performance. With spray foam on the roof line, you have an air-tight seal on your house, which greatly reduces the stack-effect and air infiltration. When you spray foam the roof line, you have now moved the HVAC ductwork to the thermal boundary of the house, which will save 10-25% on your energy bills alone.
High Performance New Ranch and Cape Cod Style Homes
If you are building a new ranch or two-story home, we will spray a 2-3” foam air tight lid on top of the drywall, and then come back over the top of the foam with an R38 cellulose to give you a total of R50.
If you are building a new Cape Cod-style 1½ story house or a bonus room above the garage, we will, again, spray your entire roof line with open cell foam to get top performance. With spray foam on the roof line of a new home, you greatly reduce the stack-effect and air leakage.
Going Beyond the Energy Savings
On top of the 30-50% savings on energy bills, insulating your attic with spray foam helps prevent external irritants and allergens from entering your home. Spray foam can also provide significant noise reduction from outside noise as well as a less dusty new home.
With a properly insulated attic, you can imagine the added comfort you have just added to the whole house, especially to the second level! We get many great reports when we spray foam on the underside of roof lines in new or existing homes.