 Re: Help with Stucco Cracks
Balty,
I am not too sure of what you call stucco!
My interpretation of stucco is a water proofing cement render with small bits of the same render material thrown onto the smoother renderred surface to make a decorative and waterproof finish.
I renderred (stuccoed?) my oven using a simple mix of 3parts red plaster sand to 1 part portland cement. Been using it after the recommended week of conditioning/drying it out and 3 hefty cook-ups and not so much as a hairline crack. This 3/4" render went over 3 x 1" layers of vermiculite cement (5 vermiculite:1 portland cement) which was coated over a 1" high temperature themal blanket.
I agree with Jim, roughen it up and recoat it, possibly with a more commonly reliable render/stucco formula, because after all it should not be subject to any kind of heat. You may wish to give it a lite wash with a portland cement/water slurry coat (which acts like a primer coat), to improve the bond.Tile stores have primer materials that are used to improve the bond of tile adhesive over existing or older cement surface.
Neill  |