Start here
Is a garage door insulation kit worth it?
Short answer
A garage door insulation kit is worth it when the door is single-layer steel in good condition and the garage is attached: foam panels fitted into each section cut the cold coming through the steel and quiet the door. It will not match a factory-insulated door, and the added weight means the springs must be checked afterward.
The job
What a kit can and cannot do
Most single-layer steel doors are hollow behind the steel. A kit fills each section with rigid foam panels or a reflective insulation layer, held in place by clips or adhesive. The steel stops ringing, and the garage holds its temperature better.
What a kit cannot fix is air leaking around the door. Gaps at the bottom, sides and top let in more cold than the steel does, so a kit is paired with new weatherstripping where the seals are worn. And because the door gets heavier, the springs are adjusted so it stays balanced.
Cost
What moves the price of an insulation kit
Kit installs depend on the door's size, the kit type and what the seals need. We price the whole job, including the spring adjustment, before starting.
- Single or double door
- Foam panel or reflective kit
- Spring adjustment for the added weight
- Weatherstripping replacement
- Condition of the door's steel and struts
Compare the options
Insulation kit or a new insulated door
Both warm the garage. The door you have decides which makes sense.
| Insulation kit | New insulated door | |
|---|---|---|
| Best when | Steel door is sound, just hollow | Door is worn, dented or very old |
| Insulating value | Moderate | Higher, built in |
| Springs | Adjusted for the added weight | Sized new for the door |
| Looks | Unchanged outside | A new face on the house |
Foam panel kits
Foam panel kits
Rigid foam panels cut to fit each section are the most common kit. They add the most insulation of the retrofit options and stiffen thin steel. We measure each section, trim the panels for a tight fit around struts and hinges, and secure them so they stay put as the door curves into the track.
Reflective insulation
Reflective insulation
Reflective kits use a foil-faced bubble or foam layer that reflects radiant heat. They are thinner and lighter than foam panels, which helps on doors with little spring margin, and they suit garages where summer heat is as much a problem as winter cold.
Sealing the gaps
Sealing the gaps
Insulating the sections without sealing the perimeter leaves the biggest leaks in place. We check the bottom seal, side stop molding and top seal and replace what is worn, which on many doors makes as much difference as the foam itself. See garage door weatherstripping.
Around Naperville
Hollow steel doors in Naperville garages
Westglen, built between 1978 and 1993, and Royce Woods, built from the late 1980s to the late 1990s, are the kind of Naperville neighborhoods where a single-layer steel door installed with the house can still be in good shape. When the steel is sound, a kit is the economical route to a warmer garage, and when the door is dented or rusting at the bottom, we will tell you a new insulated door is the better spend.
Do it yourself or call
Kits you can fit, and the part you should not
Fitting panels is homeowner work. Rebalancing the door afterward is not.
Fine to do yourself
- Measure each section and buy a kit that fits
- Cut and fit panels around hinges and struts
- Clean the steel so clips or adhesive hold
- Replace a worn bottom seal in a sound retainer
Leave to a technician
- Adjusting spring tension for the added weight
- Checking that the opener still reverses correctly
- Sealing gaps at rotted jambs
- Any work near the bottom brackets
How the visit runs
How a kit install runs
- 1
Check the door
Steel, struts and springs must be sound.
- 2
Measure the sections
Panels sized to each section, around hinges and struts.
- 3
Fit the insulation
Panels or reflective layer secured to every section.
- 4
Seal the perimeter
Worn bottom, side and top seals replaced.
- 5
Rebalance and test
Springs adjusted, opener force and reverse checked.
Answers
Questions about garage door insulation kits
On a sound single-layer steel door, yes. They cut cold through the steel and quiet the door, though they will not match a factory-insulated door.
It adds weight, so the springs are adjusted to keep the door balanced. That step matters for the opener's life.
Foam panels insulate more; reflective layers are lighter and help with summer heat. The door and garage decide.
If the door is sound, insulate. If it is dented, rusting or very old, a new insulated door is the better value.
Often. Gaps around the door leak more cold than the steel, so worn seals are replaced with the kit.
Same group
Related door work we handle
Garage Door Weatherstripping
Bottom seals and side stops replaced to block drafts, water and mice.
Garage Door Jamb & Trim Repair
Rotted jambs and loose brackets rebuilt so the door has something solid to hang on.
Retractable Garage Screen Doors
Screens that roll away when the car comes home.