What Staple Size to Use for Insulation?

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Stapling home insulations is a regular thing if you want it secured and in place for a long time. If you want to staple your insulations, you should know what the size of staples for insulation to do it properly is.

What Is the Size of Staples for Insulation?

The size of staples for insulations is generally ¼ inch, 5/16 inch, or ⅜ inch. Make sure you have enough staples so that they can hold the insulation in place and won’t have problems in the long run.

An image of a staple in a wooden table

Stapling allows you to keep your insulation in place almost forever. It also saves you money in the long run and keeps your insulation working in good condition. Hence, you should pick the right staples for your insulation.

The Importance of Stapling Your Insulation

Insulation helps keep your home in heat by providing resistance to heat flow. Staples will ensure that these insulations will work consistently by keeping them in place. It helps keep your home interior cool so you won’t have to use air-conditioning more often, saving you lots of money from electricity bills.

If you don’t use staples, your insulation could end up moving and then falling off with time. This will cause less effective heat control, so you end up relying on a temperature control system which will cost you more.

Hence, stapling is a must if you want to preserve your insulation for a long time. Most professional builders will recommend using staples for insulation, and it’s best to follow them.

What Type of Staples to Use

Most people would recommend always using electric staples. They are double insulated, so you have better safety features since you won’t be electrocuted if you happen to staple a wire.

RCD or residual current device is a useful safety feature for plugged-in staple guns. It keeps you safe by cutting off the power supply if there’s any sort of electrical malfunction saving you from electrical accidents.

Try to avoid metal staple guns since they are not insulated so you run a high risk of getting electrocuted. Although there can be safety measures you can put in place, it’s still better to use electric staples with RCD.

An image os staple together with the different tools

How Many Staples to Use for Insulation

You should use around 600 to 900 staples per pack of insulation. It also depends on where you gonna install your installation. The most commonplaces staples installed for insulation are:

  • Ceilings
  • Exterior walls
  • Basements
  • Vented crawl space
  • Unvented crawl space
  • Floors
  • Plumbing and piping

Having more staples ensures that you have enough to keep the insulation in place. You also have to consider the size of your insulation for installing staples.

R-Value and How It Affects Your Insulation Placement

Insulation can be placed in almost any place as long as it is secured and won’t shift. You need to know the right R-value since most spaces have different area sizes, and knowing how many insulations are needed to get the right R-value is more important.

Calculating the R-value can be complex that’s why most people seek professional services for installing insulations and staples. This way, you are safer and leave the work to people with expertise in installation.

If you like to do it yourself, you can check for a guide on how to calculate R-value. It can be a bit complex, so you must spend some time reading and learning.

How Stapling Works on Insulation

Stapling depends on where your insulation is going to be placed. Spacing between stapling insulations can spread from 3 inches to even 12 inches. You can do inset stapling or face stapling installation, depending on what you prefer.

Inset stapling works with the insulation inside a cavity, which is pressed at the sides so that the stapling flange is even with the framing. Then you can staple it from top to bottom. Most people consider this stapling to lose R-value. However, it does have its uses in certain insulation setups.

For face stapling, the insulation is placed between the framing members with a tight fit. You then staple the flanges to the face of the framing. This type of framing produces a better vapor barrier and fewer gaps between drywall and insulations.

A close-up image of a staple

Related Questions

What Size Staples Do You Use for Vapor Barrier?

You use ¼ inch or 5/16-inch staples for the vapor barrier. You will need around 500 staples to cover 1,000 square feet. The size will be enough to keep the vapor barrier insulation in place.

How Do You Know What Size Staples You Need?

The staples should be three times longer than the thickness of the material.  You would know what size staples you need by checking the bottom of your staplers. If you don’t have a stapler gun, then check what size you would need for your insulation and go from there.

What Are the Different Sizes of Staples?

The different sizes of staples used for insulation are ¼ inch, 5/16 inch, and 3/6 inch. For heavy-duty staples, the common sizes are 23/8, 23/12, 23/15, 23/20, 23/24, 13/10, and 13/14.


Choosing the right size for your staples for insulation is essential to keep your insulation in place for a long time. Ensuring the right size of staples will lessen your cost of having to replace the staples because it is too loose or too tight.