Roof waterproofing

Roof waterproofing in Durban

Roof waterproofing is an easy enough task. We will assess whether there is compatibility between the existing roof surface and the liquid product intended to be used. When you do not pay attention to the type of material previously used, you could make a dire mistake. It is a bad idea to apply urethane over a surface that was previously coated with acrylic. This type of surface does not take any kind of coating, as a surface that is silicone will not take to adhesion

It is a bad idea to apply urethane over a surface that was previously coated with acrylic elastomeric. This solvent presents a high risk of re-emulsification for acrylic. Another example is a roof that is previously covered with silicone. It is also very important that you clean the flat roof properly of the substrate.

Whether you have a new deck or existing roof system, this process is important as liquid products need to stick directly onto the clean surface. Debris, grease, dust and other bond breakers caught between the surface of the deck and fluid material will weaken.

Consequently, a substrate that isn’t properly cleaned will have a negative effect on the performance of the membrane and cause failure. Pressure washing is the most important method of cleaning an existing roof for preparation. Most manufacturers specify for this purpose their own detergent, which is biodegradable one, or widely accepted equivalent.

Steps to Waterproof a Roof

A typical application of liquid-applied roof membranes consists of five main steps, these should be treated with the highest importance, following the product manufacturers instructions. These steps are priming, cleaning, main coating application and inspection.

The first step in waterproofing a roof is cleaning the substrate. All successful liquid applied membrane applications require superior adhesion. Proper cleaning is just as important as the actual correct application of the liquid material. Pressure washing is the most common method for cleaning the substrate surface. This process eliminates the so-called bond breakers.

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