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 19, 2026
Insulating Basement Walls in a Nashville House
The usual way to finish a basement wall, studs and fiberglass against the block, is the one that most often ends in a damp, musty wall. Here is what goes against the foundation instead.
Read itOctober 12, 2026
Sealing and Insulating the Ductwork in Your Attic
In a lot of Middle Tennessee houses the air conditioning travels through the hottest, most humid room on the property before it reaches you. What happens to the ducts up there decides how much of it arrives.
Read itOctober 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 often the weak spot in the lid.
Read itSeptember 21, 2026
Insulating the Empty Walls of an Older Nashville House
The attic and the crawl space are easy to reach, so they usually get done first. The walls of an older house take more care, and they can be filled from outside or from inside.
Read itSeptember 14, 2026
The Bonus Room Over the Garage
Plenty of Middle Tennessee subdivisions have one, and it is often the room the family avoids in summer. The reasons are structural, and they repeat 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
Insulate the floor over a vented crawl or the walls of a sealed one. Once the walls are done, the floor above needs none.
Read itSeptember 1, 2026
Spray Foam, Blown Cellulose or Fiberglass
Spray foam insulates and air seals in one pass, and it is the least forgiving of the three. Which matters depends on where it is going.
Read itSeptember 1, 2026
Insulation, Vapor and Middle Tennessee Humidity
Water vapor heads for the cold side of a wall, which means outward with the heat on in winter and inward on a humid day with the air conditioning running.
Read itSeptember 1, 2026
What Insulation Actually Pays Back
The attic usually has the most to gain and the walls the least. The order we’d spend in, and the rebates worth checking before any work starts.
Read itSeptember 1, 2026
Radiant Barriers in a Nashville Attic
A radiant barrier handles heat radiating off a hot roof. Whether it pays depends on the attic, the ducts and what is already up there.
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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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.