On a July afternoon in Carrollton, a garage with a thin, single-layer steel door can get far hotter than the outdoor air. That heat soaks into the rooms next to the garage and any bonus room above it. If you are replacing a garage door, one of the first choices is whether to go insulated. Here is how to decide.
What makes a garage door insulated
Garage doors come in three basic builds:
- Single-layer: one sheet of steel with no insulation. Lowest cost, little protection from heat and noise.
- Double-layer: steel on the outside with a layer of polystyrene insulation behind it.
- Triple-layer: steel on both sides with insulation sandwiched between. Strongest, quietest and best at holding temperature.
What R-value means
R-value measures how well a door resists heat moving through it. The higher the number, the better it insulates. Single-layer doors have almost none. Insulated doors range from moderate R-values for polystyrene to higher values for polyurethane foam, which fills the whole panel and also makes the door stiffer.
Benefits in a West Georgia home
A cooler garage in summer
An insulated door slows the heat coming through the largest opening in your house. Many owners notice the difference the first summer, especially with a west- or south-facing garage.
More comfortable rooms nearby
Bonus rooms over the garage are common in Carrollton two-story homes. A cooler garage helps those rooms stay comfortable.
A quieter, sturdier door
Insulated doors are stiffer and dent less easily. They also run more quietly, which matters if someone sleeps above the garage.
Better protection for what you store
Paint, electronics, a second fridge and outdoor equipment all last longer in a garage that does not swing to extreme temperatures.
When an insulated door makes the most sense
- The garage is attached to the house
- There is a bonus room or bedroom above the garage
- You use the garage as a workshop, gym or play area
- The garage faces the afternoon sun
For a detached shed or a garage used only for parking, a single-layer door can still be a sensible choice.
Don’t forget the seals
Even a well-insulated door lets heat and pests in through worn bottom and side seals. New weather seals are an easy upgrade, and our tune-up and weather seal service replaces them. A new, heavier insulated door may also need the springs re-sized, which we handle as part of spring replacement when needed.
Choosing your new door
We bring samples, measure the opening and help you compare single, double and triple-layer doors in the style you want. See our garage door installation service, or call Carrollton Garage Door Repair at (770) 555-0196 to talk through your options.