Questions and Answers for LaHabra 80 lbs. Mortar/Cement/Concrete Mix Fastwall Stucco Base Sanded 1 Coat

A:  Mich, yes FastWall Stucco Base Sanded can be applied over masonry/cmu block.

A:  Justwondering, typically you would put a finish over FastWall Stucco Sanded Base, such as LaHabra Exterior Stucco Color Coat.

A:  WallE, on masonry and concrete, apply only to surfaces that are sound clean, dry, unpainted, and free of any residue which may affect the ability of the product to bond to the surface.

A:  The product has never been tested under these conditions. LaHabra Fastwall engineered for a one coat application so there is no guarantee it would bond.

A:  Hi Gail, yes this product can be used over CMU.

A:  Yes, this product is excellent for use over CMU.

A:  Hi fredds, I would side with the contractor in this matter.

A:  Fastwall is designed to be used in stucco systems and is not designed for any other applications.

A:  The answer will depend on the blocks used on the inside of your firepit. If they are the heat resistant kind (which you should always use for fire pits), then you can use stucco for anything that would not expose it to a lot of heat. Stucco, like most other surface materials, expands and contracts with the temperature, so if you expose it to heat on one side or in one area, but not evenly, then it will tend to crack (badly). You would be better off using some kind of artificial surface treatment, like "fake brickwork" (they look like bricks on the surface, but are actually very thin veneer bricks) which can be quite good looking and would not have the same expansion problem. You can use stucco, just know that it will likely crack. You can fill the cracks, but I think you will end up in a never-ending crack battle.

A:  Yes, as long as the inner wall is fireproofed using fire brick while the outer walls should use heat resistant cinder blocks before applying the Fastwall. You can finish the wall with a variety of materials including stucco, thin brick veneer, traditional brick, etc. If you have no plastering experience the recommendation would be to have a contractor build the pit to avoid any failures.

A:  As long as no structural framing is behind the board you could use this product. Consult a professional before proceeding.

A:  Yes, you should be able to apply over the base coat. Please check with the plaster manufacturer's recommendations.