What Is Dimpled Membrane Used For?

The ground on which a building is constructed can cause damage to waterproofing. If the vertical foundation insulation is not properly protected, capillary moisture rise can occur in the lower part of the foundation or basement. Bituminous waterproofing requires strong protection against mechanical damage. Dimpled membrane is an excellent solution for this purpose. However, for it to work effectively, it must be installed correctly.

Properties and Applications of Dimpled Membrane

Application:

Dimpled membrane is primarily used for protection. Its installation prevents compression and abrasion of the insulation while also protecting it from soil pressure. This is particularly important when foundation waterproofing is backfilled with soil. The membrane also prevents displacement of the waterproofing system components during building settlement.

The unique dimples on the membrane enable faster drying of vertical foundation insulation. This is due to efficient air circulation between the dimples. The gap between the membrane and the insulation allows moisture to be effectively drained from vertical surfaces. This creates an additional barrier against moisture coming from the soil.

Dimpled membrane maintains optimal air circulation, even when groundwater pressure is applied from the other side. While it cannot serve as the sole protection against moisture, it is a highly effective supporting layer for waterproofing.

Dimpled membranes with geotextile layers have a slightly different application—these are installed with the dimples facing outward. To properly drain moisture into the perimeter drainage system, the prepared trench should be backfilled with gravel of larger granulation.

Types of Dimpled Membranes

There are different products available for waterproofing, and dimpled membranes come in three main types, distinguished mainly by the reinforcement material used.

• Glass-Fiber Reinforced Dimpled Membrane – Offers high mechanical resistance and works well for moisture-proofing internal basement walls. However, this is a costly solution.
• Geotextile Dimpled Membrane – Designed for moisture drainage, primarily used to enhance the efficiency of perimeter drainage systems around foundations.
• Standard Dimpled Membrane – The most common and economical option, without additional layers or reinforcements. It serves as extra protection for foundations, prevents mechanical damage, and improves air circulation and moisture drainage.