Extend the Life of Your Roof with Expandothane Protection
Expandothane Roof Restoration That Seals, Shields, and Protects
Expandothane is more than another coating applied to an aging roof. The system combines a fast-curing, flexible waterproofing membrane with a hard aliphatic polyurea topcoat. The base membrane expands to seal seams, gaps, and damaged areas, while the topcoat creates a durable, UV-stable protective shell. Together, the two layers form one complete waterproofing system designed for long-term performance.
Restore the Roof Without Starting Over
When the existing roof structure is still sound, Expandothane can be installed directly over it instead of requiring a complete tear-off. Damaged areas are addressed, the surface is cleaned and tested for adhesion, and the Expandothane membrane and protective topcoat are then applied. This approach means less demolition, less debris, and a much shorter project window than removing and replacing the entire roof system.
Built for Long-Term Protection
The strength of the system comes from what happens after the roof is sealed. The aliphatic polyurea topcoat cures into a hard, dense finish designed to withstand sun, salt air, coastal weather, and impact while protecting the flexible waterproof membrane underneath. When installed by an authorized applicator, the complete Expandothane roofing system is backed by a 20-year system warranty.
Why Expandothane Outperforms Traditional Foam Roofing
- Cures in Seconds: The fast-curing application reduces the amount of time the roof remains exposed during installation.
- Seals Vulnerable Areas: Expandothane expands into seams, gaps, and damaged areas to create a continuous waterproof barrier.
- Resists Impact and Hail: The system is tested to resist cracking under impact, adding another layer of protection against demanding weather conditions.
- Works Over Sound Existing Roofing: Expandothane can be applied over the existing sound roof structure, eliminating the need to strip everything down to the bare deck.
When Expandothane May Not Be the Right Fit
Expandothane is designed to restore and protect a sound existing roof structure, so there are situations where restoration may not be the appropriate path. The proposal specifically positions the system as an option when the existing roof can remain in place rather than requiring a complete tear-off.
- Structural Problems: A roof with underlying structural issues may require more extensive work before a restoration system can be considered.
- Unsound Existing Roof: Expandothane is intended to be applied over a sound existing roof structure, not used as a substitute for a roof that needs full replacement.
- Damage Requiring More Than Repair: The process calls for deteriorated areas to be removed and repaired as needed. If the existing system cannot reasonably be restored through targeted repairs, a different roofing approach may be necessary.
Roof Restoration Without the Long Disruption
Expandothane brings the biggest advantages of roof restoration into one complete system: a faster installation, less disruption, serious surface protection, and long-term coverage. Instead of automatically tearing off a sound existing roof, the process targets damaged areas, prepares the surface, and builds a new waterproofing system directly over what can remain.
- Six-Step Restoration Process: Inspect and assess, repair damaged areas, clean the surface, test adhesion, apply the Expandothane membrane, and finish with the protective topcoat.
- Less Disruption: Rooftop-only work, fast-curing materials, and no full tear-off help keep normal activity moving below.
- Hard Protective Topcoat: The aliphatic polyurea finish creates a dense outer shell designed to withstand sun, salt air, weather, and physical wear.
- 20-Year System Warranty: When installed by an authorized applicator, the complete Expandothane roofing system is backed by a 20-year warranty.
- Proven Installation Process: From the initial test patch through the base membrane and finished topcoat, each stage builds toward one complete, protected roofing system.
What Can Diamond Pro Do for You?
Fill out the contact form below, and a member of our team will reach out to you as soon as possible.