Solving the problem of terrace leakage

1. Indoor survey (from inside out)

Look at the ceiling and walls: Carefully observe the junction (shaded corner) of the ceiling and walls below the terrace. Water stains, mold, peeling, and bulging latex paint are the most direct evidence. Remember the highest point of the water mark, which is often the area directly above the source of the leak.

Determine the type of water leakage:

--Drip like: Generally, it is a point like water leakage, which may be caused by local damage to the waterproof layer or pipeline problems.

--Flaky dampness: Large areas of dampness are often caused by the failure or cracking of the waterproof layer.

--Rule line: Leakage along a line is highly likely to be a crack in the terrace wall or floor.

2. Outdoor survey (from top to bottom)

Go up to the terrace and focus on checking the following high-frequency water leakage points:

--Surrounding the floor drain: This is the 'hardest hit area'! Touch the area around the connection between the floor drain and the ground with your hands to see if there are any looseness or gaps. Pour water test to see if the water flows smoothly and if it seeps down from the edges.

--Corner and threshold: the junction between the terrace floor and the wall (corner), and the lower threshold of the sliding door. These places are prone to cracking due to their different structures.

--Various types of cracks: Carefully inspect any visible cracks on the floor and walls, even fine hair like seams, which are large channels in front of the water's infiltration pressure.

--Root of the pipeline: Check for aging or cracking of the seals around all pipes that pass through the terrace, such as air conditioning drainage pipes and solar energy pipes.

--Current situation of waterproof layer: Observe whether the original waterproof membrane is bulging, damaged, or cracked at the overlap. If it is waterproof coating, check for powdering and cracking.

--Drainage slope: Pour a basin of water and see if the water can quickly flow towards the floor drain or accumulate in a certain area (stagnant water is the root of all evil).