Waterproof basement as a white sink

In construction, a watertight basement is called after the construction principle of the so-called white tub. The hermetically sealed basements prevent any water exchange from outside to inside and vice versa. The construction is more complex and more expensive than normal cellars.

Special concrete poured clean

As the base material for the production of a watertight cellar concrete is used, by which no water can affect. It can be cast on site or installed in Fertiggießplatten. The WU concrete must be processed with great precision, as any subsequent leaks are due exclusively to inadequate processing.

In the bottom plate, a joint tape is poured in, which hangs up to twenty centimeters in the places where later the basement walls are placed. This hermetically seals the most sensitive part of the cellar construction, the transition.

Waterproof basement as a white sink: basement

About the outstanding joint tapes, the cladding for the basement walls are set. After the reinforcement, partly connected to the floor slab, the walls are poured. At this moment, the craftsmanship precision plays the biggest role. The formwork must be perfectly finished and the WU concrete must be tightly and completely filled on the base plate.

Black tub

Traditionally brick cellars are also referred to as black tub. The name derives from the black bitumen used as outer wall seal. In addition, a drainage must be created. This ditch, running around the cellar, is filled with pebbles to distribute water and discharge it decentrally into the ground.

Even a black tub can lead to a watertight basement. However, the risk of bitumen seal weakness is greater than with the white tub.

Tips & Tricks

The white tub is particularly recommended in flood areas and regions with a high groundwater level. The additional expenses for the additional reinforcement and the special concrete may save a lot of trouble and costs in the future.

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