Exterior Basement Waterproofing

Posted on: 1 August 2022

Basement waterproofing has several steps taking place in the interior area of the space. However, the exterior of the basement also needs waterproofing. If you avoid waterproofing the exterior, it can lead to several issues. The most common of these issues is water entering the interior of the basement. Here are some of the steps in exterior waterproofing for your basement and what to know about each. 

Membrane Coating

The first step to exterior basement waterproofing deals with the membrane. The membrane helps seal the concrete and ensure there is a layer of protection in place. The membrane layer is usually a spray-on type of polymer. It provides a thicker seal than most quick seal options. Many membrane sprays have two advantages. The first advantage is the ability to create a thick layer on the first application. The other advantage is the durability of the membrane after drying. As the membrane dries, it will harden and create a firm expanded membrane that covers the entirety of the area. 

Drain Mat

A drainage mat installation should be part of the exterior basement waterproofing. This drain mat is usually made of concrete and is placed near the basement walls. The key to this drain mat is the dimples located throughout the entirety of the mat. The dimples allow the water to flow evenly away from the basement walls and into the drainage trench. This also keeps water from pooling which can break down the membrane and lead to leaks and foundation damage. 

Drainage Trench

Drainage trenches are vital to maintaining the waterproofing of your exterior basement walls. These trenches must be part of the waterproofing system to help draw the rainwater and debris to the final drainage area. The trench is usually placed near the exterior wall and next to the drain mat. With the membrane as the first step, you can reduce the chances of water damage from flooding. The drain mat will help move the water to the trench, and the trench removes the water from the area towards the road or other drainage area. 

When you are ready to move forward with the exterior waterproofing of your basement, contact your area exterior waterproofing pros. They will discuss the waterproofing with you and a date to begin. Remember, waterproofing service providers can also inspect your basement and other areas of your home to determine if there are any issues with other areas of the home. If there are, you can agree to have those areas scheduled as well.