Should I insulate the garage in the home I'm having built?


It's not generally necessary to insulate a detached garage in the UK if you don't plan to heat it. In many cases, however, your garage will be attached to your house, sometimes with an adjoining door. Attached garages can be a weak spot in an otherwise well-insulated home, potentially allowing heat to escape through walls or floors. Strategic insulation can turn your garage from a liability into an asset.

Partial insulation

The time and expense of insulating your entire garage is not generally worth it but insulating the walls or ceiling where your garage adjoins the house may be. This is particularly important in older houses, as the floors above garages were often left uninsulated. Placing insulation around doors can also cut down heat loss, especially if there is a door from the garage to the house.

Garage ceiling

If you have a garage beneath one or more of the rooms in your house, you have two possible options for insulation. You can insulate the...

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1. A major heat loss is the garage floor. Especially the 3 foot strip at the front, along the back, and along the side that does not abut the house. The ground outside will be frozen and the ground under the garage next to the frozen ground will be quite cold. The floor slab (any concrete or masonry or stone) has a very low R value.

2. A major heat loss is around the edges of the garage door. I am still looking for a roll up garage door weatherstripping system and so far haven't heard of one. The tyupical door jamb weatherstripping they sell at Home Depot etc. doesn't remain touching the door given its lack of springiness and the in and out play of the door in the tracks. Such a system needs to engage autmatically, withougt an additional maneuver such as vecroing of flaps, zippering up and around, or...

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When I bought my 2nd house i had the builder insulate the garage door. My previous house had no insulation and as luck would have it the garage faces the same direction. I can tell you that the insulation of the door does help a lot. in the summer my old house garage felt like an oven in the summer and freezer in the winter to the point i would just leave beer out in the garage in the winter and always had cold bear. In my new house in the summer when the temp outside was 105 the garage was still 85. and in the winter when it was 20 outside the garage was still in the 50-60 range. the insulation is fairly reasonable at Lowe's or Home Depot. One thing I haven't done is what was already suggested, using weather striping around the exterior door.

You should also be able to claim a tax credit for the improvement. I believe it falls under the energy efficiency programs. Ask you tax...

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Insulating your home in the right areas will make it more comfortable, reduce energy costs and increase the market value. Energy costs in poorly insulated homes are estimated to be 30 to 50 percent more for heating and cooling than homes with up-to-date insulation. A well-insulated home is much quieter and when it is time to put it on the market, it will always command a higher sales price. In order to have the most effective insulation installed in your home, it is important to put it in the right locations. Let’s review the places that you should insulate your home.


Since warm air rises, the greatest volume of heat loss is through the attic as it is in the highest part of the house. If your attic is well-insulated, it will make your home warm in the winter and cool in the summer, which will not only save you money, but it will keep you comfortable. Unfinished attics should have insulation installed between the floor joists over the ceilings of the lower...

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The smallest size for a single garage is 8' x 16' which is a tight squeeze even with a small car.More popular sizes include 9' x 18' and 10' x 20'.The smallest size for a double garage is 16' x 16'.A typical family saloon e.g. Ford Mondeo is 4.724m long x 1.920m wide x 1.448m high (15'5" x 6'4" x 4'8").A typical small car e.g. Nissan Micra is 3.708m long x 1.778m wide x 1.422m high (12'2" x 5'8" x 4'7").A typical people carrier e.g. Fiat Ulysse is 4.445m long x 2.159m wide x 1.448m high (14'6" x 7'1" x 5'6").

Car sizes vary from model to model so we recommend that you check the size of your car before you order your garage.

Where should I locate my garage?

Ideally your garage should have a clear space at least 18" wide on all sides, if possible. This ensures easy access for both installation and future maintenance. In reality this is often not practical and at many sites it is not needed. A reduced clearance is often possible on one or two sides. If the...

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Should I Insulate My Garage (Or Insulate it Better)?

by Erik North on October 14, 2011

I often have discussions about garages and even more often about the finished spaces above them. These finished rooms are the source of frequent complaints about cold rooms, drafts and heating problems. I had one customer who couldnt get their FROG (awesome acronym Finished Room Over Garage) over 55 F. Brrr.

Why Is The Finished Room Over My Garage Cold?

The question then becomes what is the problem and how do we fix it. I mean, whats the problem besides needing to wear socks in your over garage bedroom. A quick multiple choice: The problem is:

A. The heating system has been sized improperly for the houses heating load.

B. The attic insulation is insufficient.

C. The garage ceiling insulation is insufficient.

D. The garage walls should be insulated better.

E. There are air leakage issues that need to be addressed.

If you...

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Garage Insulation: Yes or No?

I am having a tract home built and one of the options is to insulate the garage. All walls between the house and garage as well as the ceiling over the garage are insulated. This is only for exterior walls and there is a portion of the garage without the second floor over it. The walls and ceiling will be drywalled.

I don't have any plans to have any type of workshop or working space in there. Just cars and storage. This is AZ and it does get quite warm in the garage, however I think a lot of that heat is just from driving the car in. It seems like the insulation would just hold that heat in. My other thought is that if I want to do it later it wouldn't be too hard. The ceiling has an access hatch and the walls could be filled with insulation without too much drywall damage.

One area that it might help is the water comes in on the garage exterior wall and most likely across the garage ceiling. That pipe will get very warm up...

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Two of the core questions an auditor asks during a home inspection are, “Where is the thermal boundary?” and “Where is the nearest Dunkin’ Donuts?” (Those two questions run neck and neck.) The thermal boundary is the demarcation line for energy movement between the unconditioned exterior and conditioned interior air. This can be a bit fuzzy sometimes and one part of that fuzziness can be the garage door on an attached garage.

To insulate or not to insulate?

It’s odd when I find myself advising clients not to insulate, but that’s the case here. Normally, I can’t pile enough of the stuff in your house. Given my druthers, I’d probably spray 10 inches of closed-cell spray foam over your new dome house, add ventilation, and call it a day. But most folks are sticklers for windows and doors, so that won’t work.

The question of garage doors comes up mostly in relation to attached garages with a finished room overhead. The arrangement integrates living and utility...

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New Build: Insulate Attached Garage -- or Not?

My in-laws are sneering at me because I think insulating the new attached garage is useless. That huge garage door -- and it's massive leaks would seem to negate any effort to insulate the garage.

They swear their garage is "cooler" (here in Texas) because it's insulated. Since they have no "control" test -- I doubt it -- and I don't want to waste my time or money. The sheetrock goes-in next week -- so I'll have to hurry if I do it.

(the new house just got an R-38 insulation -- but not the garage)

I'd do it, just so that if you ever decide to spend time out there, it won't be sick-hot. You can get insulated garage doors, too.

to ronpin

I'm doing the exact same thing here in Lompoc Ca. I'm insulating the entire garage for the opposite reason of you, it gets cold and windy here

to ronpin

Go ahead and do it. Especially if you tinker out there.
You can get insulation kits for your door...

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quote:I wondered if the heat in the garage was from the attic, or from the sun hitting the garage door. My conclusion is that the majority of the heat comes from the garage door, because the temp in the garage will remain relatively steady while the attic temp climbs with the day's temperature,until the sun gets past the eves on that side, and then the garage rockets up.

I say the insulation is relatively worthless unless you find a way to also insulate the garage door and the entire exterior wall of your garage (assuming your garage is not surrounded on three sides by livable space).

They make door insulation kits, and they work pretty well actually.

And the exterior wall on your garage, even if it is not a liveable space, should be insulated.

But the insulation is not worthless, and here is why (assuming attached garage with common attic):

The sun heats up your garage through the door. That heat will go somewhere. In an attached garage with a common...

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Hi everyone,

I'm new here and just wanted to say that I've already learned so much from researching this site. It's a great resource.

So, I'm having a 16' x 16' shed built in the backyard. I plan to use it as a workspace / project studio / retreat and I want to finish it with insulation and drywall. I plan on using a 12,000 BTU portable A/C in the summer and some sort of portable garage heater in the winter. I'm in Durham, NC so the summers are hot and winters can be quite cold. The shed will be a mostly shady spot because we have a nice canopy of trees in the backyard. I thought insulating the shed would be relatively simple but after almost a week of research I'm puzzled.

I plan on using R-13 fiberglass batts in the walls and finish them with drywall. The ceiling / roof is where I'm running into problems. The roof is framed with 2 x 6 at 24" on center. There's a ridge vent that runs almost the full length of the shed and a gable vent on each side. I've...

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