How to fix ponding on a flat roof depends on the cause of the ponding.
Flat roof pond patch.
Flat roofs by their very nature will collect some water when it rains.
So if your flat roof is collecting water that doesn t drain or evaporate within 48 hours you will need to fix it.
Ponding can occur on flat and low slope roofs that are installed using tarpaper roofing tar and fine gravel or a similar built up system.
When ponding water on a flat roof starts to develop it is time to start weighing your options for repair before the problem becomes.
A variety of liquid patching materials are appropriate for fixing low spots on flat roofs.
Flat roofs by definition are not going to drain as well as slanted roofs.
Its ease of application wide compatibility superior adhesion and durability make greenslope an ideal roof pond patch and filler.
Continue with the 20 inch patch attaching each circle that.
You can also use a general epoxy concrete filler and apply mastic on top using a trowel.
Pre mixed and ready to use.
It may also void your warranty.
However this does not mean you should allow water to accumulate or puddle on top of your roof.
Greenslope is a roof leveling compound designed to facilitate positive drainage of standing water on flat rooftops.
Extremely versatile it can be used over the roof membrane for maintenance or under the new roof membrane in reroofing applications.
How to repair a roof that is ponding.
Mastic is a flexible sealant that adheres to almost any material.
Roof patch putty can be applied using a trowel to fill low areas.
However excessive ponding threatens your roof.
Apply a thin layer of roofing cement all the way to the edges of the 16 inch patch and press it firmly down over the 12 inch patch.
Henry 176 pondpatch filler and leveler is an innovative method for filling and leveling roof ponds to assure positive drainage.