Step 1 sand along the edges of the foam to create a smooth finish.
Painting waterproof foam board.
If you have a choice use spray paint over brush applied paint.
Take the foam brush and dip it into the paint gathering a small amount on your brush.
Pour your paint onto a paper plate or scrap piece of paper to easily dip your brush.
Pour small amounts of paint onto the plate at first you can always add more if necessary.
Allow the coat to dry for four hours.
Spray paint does not leave streaks when applied and you have just as many color options with spray paint as you do with other paints.
Foam board insulation is easy to cut with a circular saw with a masonry blade or scored with a utility knife and snapped like you would drywall.
Use a premade kit for this type of project.
Make sure to wear a face mask while doing this since the particles can be inhaled.
For new construction use rigid boards to insulate slabs and the outside of foundation walls.
Apply two or three coats of an acrylic paint to a foam craft using a stiff paintbrush.
Dip your foam brush in the poured paint.
When painting foam insulation it is important to remember to prime the surface to seal the foam.
This helps you get the paint into the pores of the foam.
Attach the tongue and groove insulation boards to the concrete wall with adhesive.
To attach the insulation you can use screws with large washers a special adhesive made for adhering foam board insulation or for smaller pieces you can seal them in with caulk or spray foam.
Tips for painting foam board.