foam board seams

[Anonymous]

I have placed 2" foam board on my open grid benchwork. What are methods to seal the gap between 2 sections of foam board?

[Anonymous]

I have used a paintable latex caulk to seal the joint. Ive found this works good because I can paint over it when adding groundcover, and it peels away relatively easily without damaging the foam if I want to make any changes (which I have and I will!) or if I need to takethe layout apart.

Other times Ive found if the gap isnt too big, the ground cover fills the joint enough that it cant be seen.

Good luck.

[orsonroy]

I use whatever's handy. If the gap is big, I generally use "Great Stuff" foam in a can, and sand it smooth when it's dry. If the gap is small, I'll either fill it with glue, caulk, or even glue-soaked scenery stuff. It really doesn't matter what you use, so long as the crevasse is filled.

[Anonymous]

I have covered cracks with a 1 inch wide paper packing tape with some sucess. Just wet the tape and apply. The paper backing will take any finish you might wi***o apply, and the stuff is inexpensive.

Tom

[egmurphy]

I used the pre-mixed light weight spackle compound that is available at home improvement stores. I also used this to fill gaps and smooth contours when making hills from foam.

Regards

Ed

[Anonymous]

I used plaster cloth.
Reed

[rrinker]

I don't have any significant gaps?

But each section of my benchwork is only 2' wide so there is only 1 piece of foam on each one. Each section is joined in a square to make a 8x12 overall layout, and when I glued the foam to the gridwork I made sure to push it tightly together.

The pieces WERE differing in height at the joints, each piece of foam seems to be slightly different in thickness. A little work with a sanding block took care of that and now all my joints are smooth and level.

[CFournier]

I wonder if the tape will stay tacked on the foam after a year or so of basement humidity? I will try the plaster cloth.