Does water sit on a flat addition or around an HVAC unit after rain? Bay Area low-slope roofs collect water, shade, and foot traffic. We install TPO and modified systems with real slope to the drains and flashings that survive walking.
Homes and commercial buildings get the same detailing, sized to the structure.
If this is the work your home needs, call (925) 722-6494 or send the form for a written estimate. There is no obligation.
Why flat roofs leak at seams, drains, and HVAC curbs
Low-slope roofs fail where water sits and where people walk. Open seams, clogged drains, and cracked curb flashing are the usual paths. We track the leak to the source, then weld or rebuild that detail instead of coating over a mystery stain.
TPO versus modified bitumen
TPO is a white sheet roof that reflects heat and is heat-welded at the seams. Modified bitumen is a layered system that can be right on smaller or more complicated roofs. We inspect foam and old built-up roofs before we recommend another layer or a tear-off.
How long a TPO roof lasts
A well-installed TPO roof on sound wood often runs 15 to 25 years with periodic seam and drain checks. Inland heat favors a white surface. We talk through color and walk pads if HVAC techs use the roof.
What flat roofing includes
- TPO and modified-bitumen systems
- Roof drain and wall-outlet rebuilds
- HVAC curb and pipe flashing
- Low wall and side-wall flashing
- Tear-off of failed built-up roofs
Flat roofing questions
How long does a TPO roof last?+
A well-installed TPO or similar membrane on sound wood often runs 15 to 25 years with periodic seam and drain checks. Foot traffic and standing water can shorten that life.
How do you fix a leak on a flat roof?+
We look for cracked seams, failed drains, or punctures near HVAC units. Once we find the source, we clean the area and weld or rebuild a patch that ties into the existing membrane.
Can you recover my old foam or built-up roof?+
Sometimes, if the wood is sound and the city allows it. We inspect first. Tired or wet wood needs a tear-off, not another layer.
Do white flat roofs help with heat?+
Yes. A white membrane reflects sun and can keep an inland building cooler. Darker systems can still be right on a hidden or shaded roof.