Standing water and puddles
If larger puddles remain after rain, photograph their location and extent. Have the fall and drainage clarified by the specialist company, as persistent moisture attacks the material.
Flat roof waterproofing complete: What you should check now
After waterproofing, seams, upstands and drainage count. Puddles, open seams and poor parapet details are typical expensive defects. Photograph now: Once gravel, slabs or green roofing are laid, you will never see the waterproofing again.
The most common expensive defects on a waterproofed flat roof
Open seams and connections at penetrations
Welded or bonded seams must appear closed. Open overlaps and wrinkles are classic entry points for water.
Parapet, upstands and metal flashings
At the parapet (rising roof edge), the waterproofing must be taken up and covered. Upstands that are too low and open transitions are frequent leak sources.
Outlets and emergency overflows
Blocked, too high or wrongly placed outlets as well as missing emergency overflows lead to ponding during heavy rain.
What you should document now on the finished flat roof
Photograph roof surface and water accumulations after rain
Overview photos of the entire roof surface and all visible puddles.
Seams and overlaps in detail
Take close-ups of protruding edges, cracks or waves, especially at corners, connections and penetrations.
Parapet and metal flashings all around
Photograph all around, place a folding rule at corners and door thresholds – this makes the height of the upstands traceable later.
Outlets and emergency overflows
Record every outlet and every emergency overflow with location and condition.
Secure the condition before a dispute arises
Upload your photos. We will classify what stands out in the pictures and which points you should address.