One thing that often damages a urethane foam roof is bird and bee damage. This type of damage is usually found near the edges of roofs or on top of parapit walls mostly on roofs with overgrown trees hanging over the top. What happens is birds peck holes in the foam and then the bees come and tunnel through the holes. This kind of damage is very easy to fix if caught early, but if left ignored it can cause extensive costly damage. I have seen complete walls and edges in need of complete tear off and re-foamed because this type of damage was ignored. The reason birds and bees do this is because one of the main ingredients in foam is sugar. Some ways you can help prevent this is by
1. Keeping trees cut back from the roof.
2. Place rubber snakes or plastic owls in the areas that are being effected.
In this tutorial I’m going to show you step by step how to fix this type of damage.
Things you will need:
1. Polyurethane caulking, DO NOT use any other kind of caulking they will not work (especially silicone) it will popout of the hole like a plug due to expanding and contracting.
2. A piece of cardboard or something similar to tool the caulking with.
3. elastomeric roof coating, disposable paintbrush and gloves
4. caulking gun.
Clean off the oxidized foam with a fingernail or brush.
Fill up hole with caulking.
Tool the caulking with cardboard or putty knife, apply a little pressure to make sure the caulking is down in the hole.
Apply a generous coat of elastomeric roof coating over the urethane caulking. This is very importantwith out this coating the suns uv rays will destroy the caulking and your repair will fail.