Having a properly insulated and air sealed home is key to maintaining comfortable indoor air temperatures and will drastically reduce your heating and cooling energy loads.  

Among many of our Measured Home Performance attributes, Splinters Construction & Building Performance, Inc. is a licensed C-2 insulation company that specializes in air sealing and insulating residential homes.  

It is important to understand that air sealing and insulation go hand-in-hand.  Since the air barrier (building shell) and the insulation are in alignment, the condition of one directly impacts the performance of the other.  In a home that is well-insulated but not air sealed, the insulation will perform poorly.  In a home that has been air-sealed but has little (or no) insulation, the impact of a tight building shell will be negligible.  


Insulation is measured in R-value.  R-value stands for “resistance to heat flow”.  The higher the R-value (and installation quality) of your insulation, the greater this resistance to heat flow, both into and out of the building envelope.    

Consequently, a properly insulated home will minimize the affect that the uncomfortable outside temperatures (in the attic, crawl space and outdoors) have on the temperature inside.  Because insulation does not stop air movement, however, its success is contingent upon taking the additional step of air sealing the building shell.  Otherwise, the reduction of heat flow through the insulation will be compromised by air passing through or around the insulation and leaking into or out of the house.  


Air sealing the building shell is critical because air leaks typically carry energy and moisture into or out of your home in the direction you don’t want.  If we properly air seal the building shell, we significantly reduce the natural air exchange between the conditioned space of your home and the attic, crawl space and outdoors.  If we combine this with proper insulation, we have created a strong Thermal Boundary.  

The end result is that the temperature indoors will be significantly less affected by the temperatures outside, meaning improved comfort.  Your home will be naturally cooler in the summer and warmer in the winter.  


Splinters Construction begins an air sealing and insulation project by removing any old insulation and/or debris from the attic and vacuuming it clean.    

We then measure the air leakage of your home with the Blower Door Test.  Not only does this test reveal your home’s overall leakage, but it allows us to pinpoint specific leaks in the building shell for sealing.    

Next, we create an air barrier between the living space and the attic by sealing up all of the gaps, seams and holes that allow warm air from inside your home to rise up into the attic.    

As warm air rises up and out of your home, it pulls in cool, unwanted air from places like the crawl space. The air in the crawl space can contain humidity, mold spores and objectionable particles, so we air seal the gaps, seams and holes in the crawl space to strengthen the building shell from below.    

Weather-stripping windows and doors is an additional air sealing option for you to consider.   

We then perform the Blower Door Test on your home a second time to catch any leaks we may have missed and to measure the improvement in the total building air leakage. 

Once your home has been properly air sealed, we blow the attic with loose-fill cellulose insulation to R-38 (10.5″-12″).  We measure and mark this insulation with permanent insulation rulers.    

Splinters Construction & Building Performance, Inc. also has the capability of insulating the exterior walls of your home through a process called Drill-and-Fill, as well as insulating the crawl space beneath your floors by a process called Encapsulation.    

The end result of having a Splinters air sealing and insulation project performed on your home is significantly improved comfort.