Insulation · Nashville, TN
The R-Value
Attic depth, air sealing, spray foam and crawl space insulation for Middle Tennessee houses, written for the homeowner paying the power bill.
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Notes from the attic and the crawl space
Written by Michael Blair, owner of Nashville's Insulation, from the trade’s own practice.
October 8, 2026
When Old Attic Insulation Has to Come Out
Most old attic insulation can stay and be topped up. Some of it has to go first, and one kind should not be touched at all until it has been tested.
Read itSeptember 28, 2026
Sealing and Insulating the Attic Pull-Down Stair
An attic can be insulated to the right depth and still lose heat through one rectangle in the hallway ceiling. The pull-down stair is usually the weakest spot in the lid.
Read itSeptember 21, 2026
Insulating the Empty Walls of an Older Nashville House
The attic and the crawl space get insulated first because they are reachable. The walls are the last big gap in an older house, and they can be filled from outside or in.
Read itSeptember 14, 2026
The Bonus Room Over the Garage
Every subdivision has one, and in every one it is the room the family avoids in summer. The reasons are structural, and they are the same from house to house.
Read itSeptember 7, 2026
Air Sealing Before You Add Any Insulation
Blowing insulation over an unsealed attic floor is putting a sweater on in a draft. The order of operations decides how much you get for the money.
Read itSeptember 1, 2026
How Much Attic Insulation a Nashville House Needs
Adding insulation over an unsealed ceiling is insulating a colander. Air sealing first is what makes the insulation work.
Read itSeptember 1, 2026
Insulating the Crawl Space or the Floor Above
Insulating both the floor and the crawl space walls is a common and counterproductive mistake.
Read itSeptember 1, 2026
Spray Foam, Blown Cellulose or Fiberglass
Spray foam is the best performer and the least forgiving. Which matters depends on where it is going.
Read itSeptember 1, 2026
Insulation, Vapor and Middle Tennessee Humidity
Middle Tennessee is a mixed climate, which means the vapor drive reverses between summer and winter.
Read itSeptember 1, 2026
What Insulation Actually Pays Back
Attic air sealing and insulation returns faster than almost any other efficiency work. Wall insulation in an existing house rarely does.
Read itSeptember 1, 2026
Radiant Barriers in a Nashville Attic
A radiant barrier addresses summer heat only, which in a long Nashville cooling season is not nothing.
Read itService area
Attics and crawl spaces insulated across Middle Tennessee
Nashville plus 64 other towns in 12 counties are on our insulation routes. So is the rest of Middle Tennessee within roughly an hour of Nashville.
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Is the attic letting the heat through?
Tell Nashville's Insulation about the rooms that never get comfortable. The written estimate lists the air sealing, the R-value and the square footage.