A blower door is a large calibrated fan used to measure house tightness before and after air sealing.
Is extra attic insulation worth it.
Insulating your home with spray foam insulation saves the average homeowner between 15 and 50 percent on their monthly energy bills.
However there are certain circumstances where they can prove useful.
Gaps in the attic or between the lower floors and the attic will let heated or cooled air escape to the great unconditioned outdoors making any insulation you add essentially useless.
Attic ventilation fans could be effective if your home has.
The number one prep step.
I would also ask for an estimate of the energy savings even if they are not willing to provide a guarantee.
There are different types of attic insulation and they each have their pros and cons.
Even if you pay for higher quality materials upfront you are certain to recoup that money by saving on utility bills over time.
In either case get an extra bag or roll you really don t want to run out when you re almost done putting it in.
Savings from additional insulation will be minor.
Fiberglass batting insulation comes in packaged in rolls in a standard thickness between 16 inches sometimes in 24 inches.
For inexpensive insulation fiberglass batts are recommended.
An attic floor that is thoroughly air sealed.
Some types of insulation are found in older homes and some of them may no longer be used.
Attic insulation that is less than r 19.