It depends. At L&L Roofing & Construction, we always evaluate your existing roof to determine whether a full tear-off or an overlay is the right approach. While single ply membranes can sometimes be installed over an existing roof, removing the old system often provides the best long-term results.
When We Recommend Removal
- Multiple Layers Already Installed: Building codes typically allow no more than two roof layers.
- Moisture or Rot: If the old roof is saturated or the deck is damaged, it must be replaced.
- Widespread Leaks: Severe water damage requires a full tear-off to fix underlying issues.
- Warranty Requirements: Many manufacturers require full removal to qualify for long-term warranties.
When an Overlay May Be Possible
- Only one existing roof layer is in place.
- The roof deck is in good condition.
- No trapped moisture or structural damage exists.
- Codes and manufacturer guidelines allow it.
FAQ: Do You Remove the Old Roof Before Installing Single Ply?
Q: Is a tear-off always required?
A: No. In some cases, we can install single ply over an existing roof, saving time and cost.
Q: Is it cheaper to avoid removing the old roof?
A: Yes, overlays reduce labor and disposal costs, but they aren’t right for every situation.
Q: How do you know if my roof qualifies for an overlay?
A: We perform a full inspection, including moisture testing, before making a recommendation.
Q: Will my warranty be affected if I don’t remove the old roof?
A: Possibly. Some manufacturers only warranty single ply systems installed after full tear-off. We’ll explain all warranty details up front.
At L&L Roofing & Construction, we believe in doing the right thing—because it’s the right thing. That means giving you an honest assessment of whether to remove your old roof or proceed with an overlay—never cutting corners.
Call us today at (770) 874-0372 to schedule a roof inspection and see if your property in Gainesville qualifies for single ply installation with or without a tear-off.