What Size Staples for Insulation?

You may be wondering, “What size staples for insulation?” When it comes to installing your own insulation, there are a few things you’ll need to know. Read on for a quick guide on installing insulation with staples.

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There is a lot of misinformation out there about what size staples to use for properly securing fiberglass insulation to wood studs, joists, or rafters. The main thing to keep in mind is that the type of stapler you use is just as important as the size of the staples.

For smaller projects, a hand-held stapler will do just fine. But for anything more than a couple of bags of insulation, you’re better off renting a pneumatic stapler from your local hardware store. Trust us, your back will thank you at the end of the day!

As for what size staples to use, that depends on the type of insulation you’re using. If you’re working with batts or rolls that are less than 3” thick, 1/4” crown staples that are between 1/2” and 9/16” long should do the trick. For anything thicker than 3”, you’ll want to step up to 5/8” crown staples that are between 9/16” and 5/8” long.

Of course, always check your local building codes before beginning any insulation project.

What size staples for insulation?

We often get asked what size staples for insulation are needed to properly secure the different types of applications. The simple answer is that it depends on the thickness of the material being fastened.

3/8″ crown

3/8″ crown staples are the most popular size for general insulation work. If you’re working with paper-backed or fiberglass batts, 3/8″ crown staples are the way to go. They’re also a good choice for tacking down housewrap or Tyvek.

1/2″ crown

There are several different types of insulation available on the market today, and each type requires a different size and type of staple to secure it in place. The most common type of insulation is fiberglass, which is available in batts or rolls. To secure fiberglass insulation in place, you will need to use 1/2″ crown staples.

9/16″ crown

There are three types of crowns when it comes to staples: narrow, medium, and wide. The size of the crown is determined by the distance between the legs of the staple. The application you are using the staples for will determine the size crown you need.

For example, if you are using staples to attach insulation to your walls, you will need a 9/16″ crown. This size provides enough holding power to keep the insulation in place, without being so large that it damages the material.


In conclusion, the best staple size for attaching insulation to wood is 3/8 inch. This size provides enough holding power to keep the insulation in place while also being small enough to allow the wood to expand and contract without damaging the material.