Flat Roof Depression

Remove the plies of the flat roof by thrusting into them with a spade.

Flat roof depression.

Roof impact when a heavy object such as a tree branch drops on the roof it will cause a depression in the area and likely some structural damage to sheathing and roof trusses or rafters underneath. Tile is designed for sloping roofs and will not adequately move water from the problem spot. My flat roof has a low place that accumulates standing water after a rain. It may also void your warranty.

That is something to address when it s time to re roof dyck says. Plies are the layers of felts fabrics and mats that make up roofs. The roof is built up with a cap of roll roofing about 10 years old in fairly good. They can also be semi recessed with a constructed wood or sod roof standing out.

By their very nature flat roofs do not completely drain after it rains. A depression in your low slope roof will thanks to gravity collect water after any precipitation. So if your flat roof is collecting water that doesn t drain or evaporate within 48 hours you will need to fix it. Always stand on a firm section of the roof and wear long pants long sleeves and safety glasses.

However puddles 1 or more inches deep that linger for days can indicate a. However excessive ponding threatens your roof. The roof deck s structural members could be weakened rusted if metal or broken if wood. In the photo below the impact depression is accompanied by a small hole.

Orient the spade at a 30 to 40 degree angle to the roof and start thrusting a spot in the middle of the roof. The appearance of puddles on the roof could also be caused by drainage problems so make sure outlets are cleared and drainage systems are functional. How to fix water puddling on a flat roof. Dugouts can be fully recessed into the earth with a flat roof covered by ground or dug into a hillside.

The insulation could be compressed. Never use tile to fill low spots in flat roofs. I would like to build it up myself to drain properly. Your building could have settled.

The sub roof is sturdy with no soft places the depression is only about 1 1 1 2 inches below grade in an area of about 8x10 feet. The cause of the depression matters less than your plan to repair it. How to fix ponding on a flat roof depends on the cause of the ponding.