Quick guide
| Situation | Usually |
|---|---|
| Coating worn, foam dry and firm | Recoat |
| One or two leaks, rest of roof sound | Repair, then coat the area |
| Foam eroded or ponding, roof mostly dry | New foam plus coating |
| Wet insulation, rotten deck, too many layers | Tear-off and TPO |
Moisture decides
A dry roof can be coated or foamed over. A wet roof cannot — trapped water causes blisters and rot. Probing and checking for soft spots comes first.
Costs
A recoat is the least expensive. New foam costs more. Tear-off and replacement costs the most. See roof coating cost and TPO roofs.
Call (505) 448-8513 for an honest answer.
Common questions
Can foam go over an old gravel roof?
Often, after loose gravel and wet sections are removed.
How do you check for moisture?
By probing, looking for soft spots and cutting small test areas when needed.