I'm looking for suggestions on the coating material used on foam roofs.
My foam roof is 13 years old, it has been re-coated twice as per the original installer's suggestion of 5 to 6 years. I was just up on the roof and noticed a small chunk removed by the birds or the squirrels. I plan to spray some foam to fill it. Then if the weather holds, I may or may not recoat the roof. At the least, just the repaired area.
Regardless of when, can someone suggest what the coating material is and where to buy? My email is: firstname.lastname@example.org
PS: I believe Foster City is pretty picky and when the roof was put in, mandated the coating to be light gray, not white! If that makes a difference. I would prefer white myself.
Foam in a can is not suitable for use anywhere on a foam roof. The cells are huge and soak up water like 'French Bread'. Just trim the edges of the gouge with a sharp knife and fill the hole with exterior caulk.
Please take a single edge razor blade and cut 5 random slits out of your foam roof surface. The slits should be about 1" long, 1/4" wide and 1/2" deep. Caulk the holes with exterior caulk. Put the roof slits in an envelope and mail it to me. It sounds like you are trying to coat your roof more than necessary. I can measure and evaluate the thickness of the layers of coating and tell you what you have.
Most paint stores and 'big box' stores will find something to sell you for coating your foam roof. Nobody stocks a remotely suitable material. You can ruin your roof by using the wrong material, or doing anything less than a perfect job with preparation and application.
Thanks for the reply and the advise. I appreciate your expert knowledge for foam repair.
Sounds like from what you said that the coating I have now might be okay based on your thought that it's a matter of thickness. The original installer suggested 5 to 6 year recoats, but it makes sense that if there is no wear up there from mechanical friction or no break down of the material from UV and other exposure, recoats may not be needed. I was led to believe that the coating had a limited life.
The next opportunity I have, I will do as you suggest for the repair, and send you some samples. I hate to cut up a perfectly good roof to do that though!