Created in partnership with Simply Plastics

Foam boards are a great way to add insulation and soundproofing to any room. They are lightweight, easy to cut, and relatively inexpensive compared to other materials. Installing foam boards is an easy DIY project that can be completed in a few hours.

Step 1: Measure

First, measure the area you want to install the foam boards. This will help you determine how many boards are needed and make sure they fit properly. Use a measuring tape or laser leveler for best accuracy.

Step 2: Cut the foam board

Next, use scissors or a box cutter to cut the foam board into the shapes that fit your space. Be sure not to press too hard as this could damage the material. Make sure all the pieces fit correctly before applying any adhesive.

Step 3: Apply the adhesive

Once all of the pieces are cut and laid out correctly, it’s time to start applying adhesive. Again, use caution when handling adhesives as some can be quite toxic if inhaled or ingested. You will also need to make sure you cover any outlets or switches that may be present in the area you’re working with. Use an appropriate amount of adhesive for each piece of foam board; too much can cause it not to stick properly while too little won’t hold it securely in place over time.

Step 4: Leave undisturbed for 24 hours

When all of the pieces have been adhered, let them sit undisturbed for at least 24 hours so they can completely bond together with no chance of shifting or slipping once finished. After this time has passed, inspect each piece for any gaps or unevenness and adjust if necessary by adding more adhesive, or cutting away excess material around edges if there’s too much overlap between two pieces of foam board.

Step 5: Caulking around

Finally, once everything is secure and dry, finish up your installation by caulking around each piece where it meets another surface like a wall or ceiling using an appropriate sealant such as silicone caulk designed specifically for foam board installations. This will help prevent air from entering through small gaps between surfaces and make your insulation more efficient in doing its job of keeping temperatures consistent inside your home by blocking out hot/cold air from outside sources like windows/doors which are opened on especially hot and cold days respectively. 

What type of adhesive should be used when installing foam boards?

When installing foam boards, it is important to use an adhesive that is suitable for the material. Common adhesives used for foam boards are contact cement or foam board adhesive. Contact cement provides a strong bond and works best when bonding two smooth surfaces together.

Foam board adhesive is specifically formulated for foam insulation materials and forms a flexible seal between the boards and substrate. Both of these adhesives can be found at most home improvement stores.

It is also possible to use construction grade staples in some instances, such as joining pieces of rigid insulation or attaching furring strips, but care should be taken to ensure that the staples do not penetrate through the foam board material.


Installing foam boards is an easy DIY project that requires just a few materials but yields great results when done right! Follow these steps carefully and take your time with each step – accuracy is key here to getting optimal results when finished!

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