6 Tips to Using Rigid Foam Board Insulation Sheets

Rigid Foam
  • 2-3 hours
  • Beginner
  • 100-200
What You'll Need
Utility knife
Measuring tape
Vapor barrier
Cleaning solution

If you are new to installing rigid foam board insulation and have a project coming up soon you may need a little bit of guidance. Before you begin, here are a few things to help you through the process.

Tip 1 - Measure the Space Twice

Measuring two or even three times can only help when it comes to insulation. You want to make sure that you are getting a snug fit so that you have the maximum amount of insulation.

Tip 2 - Frame the Space

Framing the space is almost as important as measuring correctly because you can make sure that you get the best fit for the insulation and that way no air or moisture can get in or out. You can use wooden boards to make the frame yourself or you can by frames that are already assembled and then drill them together. Either way you will want to make sure that you are leaving about 2 to 3 feet in between each frame so there is enough room for the boards, but not too much room that it isn't sturdy and can fall through.

Tip 3 - Cutting

When you are cutting many people mistakenly go for scissors. Do not do this! You will want to use a utility knife and a ruler to score one side where you want to cut it and then bend it back so that you get a crease and score the other side and it can be cut apart. this way you are keeping all of the insulation in tact and not damaging or pulling anything out.

Tip 4 - Use a Vapor Barrier

This is basically a sheeting that you will staple to the boards. It will protect from moisture, mold and will help if you live in a very humid climate.

Tip 5 - Attaching to Cement Walls

Many people think that attaching the foam boards to cement walls is simple and should be done with cement. This is not true. When attaching to cement you will want to use an adhesive. You also do not want to attach the foam board to anything using nails or screws because then you are lowering the insulation's r-value by a lot and it will eventually defeat the purpose of the insulation if it has a ton of holes in it. A strong adhesive should do the trick. Let it sit and secure for a day or two before moving on.

Tip 6 - Clean the Area

Cleaning the area is one of the best tips that you can get. Many people think that because you are just installing insulation you don't need to clean it beforehand but you have to so that you can make sure that it installs properly. This is especially true if you are removing old insulation and replacing it with new. You want to dust and get any particles or debris out before beginning a new project.

These tips should be helpful in the installation of foam board insulation sheets.