Examples of Roof Waterproofing
Click on an image to enlarge.
- Asphalt without gravel – coated to extend life. The oils in the asphalt have started to dry out – see the “alligatoring”.
- A fairly large asphalt roof with pea gravel on top, divided by expansion joints.
- Bald asphalt roofing with fiberboard underneath. Asphalt is drying out and cracking.
- Insulation and EPDM membrane loose laid on either the roof deck or another roof – the ballast rock weighs the system down.
- A section of this asphalt and gravel roof was overlaid with a new roof. In this case insulation and then a mechanically fastened Duro-last PVC membrane. Duro-last is one of the few manufacturer’s requiring vents to release any moisture and help secure the membrane to the roof.
- TPO – has a little water on it from snow melt.
- Metal Roof. On this one the fasteners are rusting but the panels are in good shape.
- This shows a non-reinforced EPDM membrane over mechanically fastened isocyanurate insulation. The membrane securement failed.
- Older PVC membrane. Note cross-hatch pattern shows embedded mesh. This points to a hole in the mebrane.
- PVC roof with solar panel installation – membrane secured with Rhino-bond method – special plates secure the insulation underneath and membrane is welded to the plates.
- Reinforced EPDM. See the cross-hatch pattern in the reinforced EPDM. This is tougher than non-reinforced EPDM.
- Spray Foam/Asphalt Gravel. Spray foam area ties-in to asphalt-gravel area.
- Spray foam roof example.
- TPO roof example.