Another problem with leaving pooled water on your roof is the ability of water to act as a magnifying glass.
Ponding water on tpo roof.
The water was sitting on top of the insulation board and started leaking in the building causing extensive damage.
Heat welded seams provide superior strength.
Your flat roof is built to withstand regular ultraviolet rays for many years.
Ponding or standing water is where the water collects on the roof and has not drained within a couple of days.
Even flat roofs contain a slight slope to maintain positive drainage.
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.
Watch this 37 second video.
Bur built up hot asphalt roofing excludes ponding breaks down and can support vegetation including moss and fungus.
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.
To resolve ponding before it damages the roof determine the cause of the ponding and select the appropriate solution.
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.
Those pitched roofs have a natural slope where the water can run down draining off the roof.
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.
If water remains on the roof system after 48 hours consider it an issue that could lead to larger problems requiring costly repairs.
Tpo membranes do not exclude ponding water from the warranty and is not affected by such conditions.
Tpo s long term heat uv and natural fungal resistance plus flexibility without need for plasticizers also make tpo a reliable low slope.
Collect dirt which may cause the growth of vegetation or telegraph mud cracking to the roof below.
Crushed insulation causing low spots.
This tpo roof actually disintegrated in ponding water.
Tpo membranes do not require the ongoing resealing of penetrations walls and curb base flashings associated with bur s.
Ponding occurs when after a storm or heavy rain water collects in pools on the roof.
Besides water one of the main damaging forces your roof has to stand up to is ultraviolet rays from the sun.
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.
Because these roofs don t drain water that well they are prone to developing what is known as ponding water.
Onding water sometimes occurs on membrane roof systems as a result of snow rainfall or runoff from equipment.
