Spraying Tar Concrete Interior Walls

If you have ever noticed the black compound on the exterior of a concrete foundation you know the ubiquity of this tar based material.

Spraying tar concrete interior walls.

Wall spray is a concrete wall spray overlay that is a cement based overlay designed for both interior and exterior vertical surfaces. The tiny paint droplets produced by spraying do not connect with each other as well as rolled on paint. Tar is painted on the walls to keep water vapor from moving in and out of the walls. Wallspray concrete wall overlay may be applied by compressed air spray equipment and by trowel.

Paint is sprayed on the wall then is quickly rolled down fusing the droplets together. Professional painters have a clever technique that combines the best of spraying and rolling. It offers a wide variety of finishes from a simple knock down to a sophisticated faux venetian plaster. Internally walls withstand continual impact and abrasion.

The porous material can allow water to pass through rather easily if not properly protected. Tar waterproofing is brittle tar waterproofing membranes has no give and cracks eventually develop as the concrete constantly contracts and expands and the house settles similarly tar paper or pargeting a layer of mortar on block walls are inelastic and crack. Using a paint sprayer. Asphalt based tar is often used to damproof basement walls.

External wall surfaces are exposed to constant attack from the weather the environment pests and chemicals. However asphalt based tar isn t a true waterproofing material. Why exterior waterproofing does not last.