If the water does not drain within a 48 hour period it is highly likely that it will stay even longer and there will be a larger amount of water standing.
Ponding water on tpo roof.
Another problem with leaving pooled water on your roof is the ability of water to act as a magnifying glass.
Even flat roofs contain a slight slope to maintain positive drainage.
Short for thermoplastic polyolefin tpo is a single ply roofing membrane that offers excellent performance at a cost effective price.
Bur built up hot asphalt roofing excludes ponding breaks down and can support vegetation including moss and fungus.
Besides water one of the main damaging forces your roof has to stand up to is ultraviolet rays from the sun.
Watch this 37 second video.
The uv stabilizers gone weathering package layer gone the polypropylene ep rubber gone all that was left was the polyester reinforcement.
The water was sitting on top of the insulation board and started leaking in the building causing extensive damage.
Collect dirt which may cause the growth of vegetation or telegraph mud cracking to the roof below.
Crushed insulation causing low spots.
Ponding occurs when after a storm or heavy rain water collects in pools on the roof.
Because these roofs don t drain water that well they are prone to developing what is known as ponding water.
This tpo roof actually disintegrated in ponding water.
Tpo roofing systems 101.
To resolve ponding before it damages the roof determine the cause of the ponding and select the appropriate solution.
Those pitched roofs have a natural slope where the water can run down draining off the roof.
Your flat roof is built to withstand regular ultraviolet rays for many years.
Most pools of water will quickly drain off or even evaporate but owners should be aware of the signs that ponding has become an issue.
Onding water sometimes occurs on membrane roof systems as a result of snow rainfall or runoff from equipment.
Ponding water is known in the roofing community as water that stands in a puddle on the roof for more than 48 hours at a time.
Tpo membranes do not require the ongoing resealing of penetrations walls and curb base flashings associated with bur s.
Ponding water is typically a sign of a drainage problem that needs to be addressed because when left unaddressed ponding water on a roof can.
Heat welded seams provide superior strength.
Tpo membranes do not exclude ponding water from the warranty and is not affected by such conditions.
Although you may be held responsible for ponding on new or re covered roof systems many elements that determine how well a roof assembly will drain are outside your responsibility or control.
