Flat and low-slope roofs are common on many Pasadena homes and buildings, and they have their own set of warning signs. Because water does not run off a flat roof the way it does a pitched one, waterproofing is everything. Here is what to watch for.

Ponding water

Water that sits on the roof for more than a day or two after rain is a red flag. Ponding stresses the waterproofing membrane and accelerates wear in that spot.

Cracks, splits, and bubbles

The membrane on a flat roof can crack, split, or blister over time, especially with sun and heat exposure. Bubbles and soft spots often mean moisture has gotten underneath.

Interior stains

Stains on ceilings or walls, particularly in the corners or along the edges of a flat-roofed area, frequently point back to a waterproofing failure above.

Worn seams and flashing

Seams and the flashing where the roof meets walls or penetrations are common failure points. Once these open up, water gets in.

Catch it before it spreads

Flat roof issues tend to spread quietly. A documented inspection identifies exactly where the waterproofing is failing so it can be addressed before it reaches the interior.

 

Want a waterproofing inspection? Schedule an inspection with Green Ladder Roofing.