Jan 27

Insulating your garage door

It’s well know that insulation is a big ,money saver for homeowners, but a lot of people neglect to insulate their garage door. Often they think of their door as being “outside” and you don’t need to insulate the outside of your house. In reality, your garage door is half way inside and half way outside, so you should insulate like the rest of your house.

First a quick work on insulation values. R-value is the value given to designate the thermal resistance in your insulation. The higher the R-value the better the insulation. You will naturally need more insuluation in northern places than Texas, nevertheless it does get cold In Texas, in some places. Different parts of the house need highrer R-values than others. For instance, attics need more than walls, which need more than floors. Additionally. R-value can vary according to what kind of heating system you have, whether it be gas, electric, oil or whateven.  One more thing: when you make the layer of insulation thicker, you also increase the R-value, but in the case of garage doors there is not a lot of latitude with regards to thickness.

There are various kinds of insulation, though any of them will do at least a decent job.

Batt insulation is what most people think of when they thing of insulation. It’s the stuff that’s made of fiberglass and comes with the brown paper backing and it has an R-value of 3-4 for every inch of thickness.

Foam board insulation is the one that comes in panels of polystyrene annd it has the shiny aluminium foil look. This stuff is great because it is very thin as well as effective.

What kind of insulation do I need for my door? If you have a steel door, you can use pretty much uses any kind of insulation you like. It will have to be inserted into the frames, but you should be able to squeeze any type  you want.

If you have a wood frame and panel door, you will need a rigid form of insulation because it will need to be inserted into the panels of the door frames. Fit as many as you can for maximum insulation.

If you have a regular wood door, or another variety that doesn’t have panels, you will need to affix the reflective variety inside on the back of the door.

Estimate: a typical two door garage with standard 9 foot doors should come to about $200 give or take. Additionaly, you should be warned that insulation will add some weight to the door. It’s not a lot but you will probably notice it.

Insulation not only makes your home warmer, it makes it quieter, which is a bonus if  you live on a busy street.