A city named for the limestone beneath it
Spray Foam Insulation in Alabaster, AL
Nearly half the homes here date from 1980 to 1999, built before Alabama required blower door tests.
- Free on-site estimates
- Written quote naming the foam, thickness and R-value for each area
- Moisture, leaks and termite access checked before anything gets covered
Houses From Alabaster's Big Growth Years
Spray Foam Insulation in Alabaster mostly means houses from the 1980s and 1990s. Alabaster incorporated in 1953, merged with Siluria in 1971, and then grew fast: from 7,079 residents in 1980 to 22,619 in 2000 and 33,284 in 2020. Point2Homes' summary of 2019-2023 Census survey data shows 17% of homes built in the 1980s and 29.7% in the 1990s, with a median year built of 1994.
The ground under Alabaster
The city takes its name from the large body of high-calcium limestone it sits on, and it occupies the Cahaba and Opossum valleys, divided by Pine Ridge. Buck Creek and Beaverdam Creek drain toward the Cahaba River. For houses on crawl spaces near those creeks and in the lower parts of the valleys, moisture under the floor is a common issue, and drainage needs checking before a crawl space is sealed.
What 1980s and 1990s houses need
Homes from these decades were built under energy rules that asked for less than today's code, and long before Alabama's 2016 update made blower door testing mandatory. Many have attic insulation that has settled to well under the Department of Energy's recommendations for Zone 3, gaps around attic stairs and recessed lights, and ductwork in the attic with joints that have loosened over time. The usual first step is sealing the attic floor and adding blown-in insulation. Where the ducts and air handler need replacing, attic encapsulation becomes worth pricing.
Bonus rooms and vaulted ceilings
Alabaster's 1990s houses often have vaulted living rooms and bonus rooms over the garage. Vaulted ceilings with little space between drywall and roof deck are hard to insulate with loose fill; the options are foam where it can be reached or improvements during a reroof. Bonus rooms usually benefit from foam in the kneewalls and short attic floors.
Siluria and older homes
The older part of the city, including the former town of Siluria, has more houses from the 1950s through 1970s. Those often sit on crawl spaces and have walls with little insulation, so dense-pack cellulose in the walls and crawl space encapsulation come into play.
When to call an insulation contractor
The signs that an Alabaster house needs insulation work are usually obvious once you know them: upstairs rooms several degrees warmer than downstairs, an air conditioner that runs all afternoon in July, a musty smell from under the house, or attic insulation you can see the tops of the joists through. Any one of those is a reason to have the attic and crawl space looked at. The visit is free, and you get a written quote whether or not you go ahead.
Tell us the age of your house and which rooms are hard to keep comfortable, and we will come take a look. Get a free estimate
What to Know in Alabaster
- Housing age. Point2Homes' summary of 2019-2023 ACS data gives a median year built of 1994, with 46.7% of homes built from 1980 through 1999.
- Geography. Alabaster occupies the Cahaba and Opossum valleys, divided by Pine Ridge, with Buck Creek and Beaverdam Creek draining to the Cahaba River (Wikipedia).
- History and growth. Incorporated in 1953 and merged with Siluria in 1971, Alabaster grew from 7,079 residents in 1980 to 33,284 in 2020.
- Housing units. The 2020 census counted 11,990 housing units with 3.5% vacant.

Alabaster Questions
My 1990s Alabaster home has a vaulted ceiling that gets hot. Can it be insulated?
Sometimes from the attic side where the vault meets a flat ceiling, and sometimes only during a reroof. We check the framing and tell you what is practical.
Is my crawl space near the creek a problem?
It can be if water collects under the house. We check drainage and moisture first, then recommend encapsulation or floor insulation depending on what we find.
How much does it cost to add insulation to an Alabaster attic?
HomeGuide lists blown-in attic insulation at $900 to $3,600 nationally, and air sealing at $350 to $3,000. Your written estimate after the visit is the price.
Do you work in the former Siluria area?
Yes, all of Alabaster.
Is spray foam or blown-in better for a 1990s house?
On an open attic floor with no ducts, blown-in over a sealed floor usually wins on cost. Where the ducts are in the attic, or in kneewalls and bonus rooms, foam often does more. We price each where it fits.
Will insulation help my Alabaster power bill in summer?
Sealing air leaks and bringing the attic up to the recommended depth cuts the heat that reaches your living space, so the air conditioner runs less. How much you save depends on the house and how you run the system, so we do not promise a figure.
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