Painting a block wall


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Old 09-20-06, 11:52 PM
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Painting a block wall

I have a backyard block wall that looks terrible, cracka nd different color blocks. Can I paint it? If so i have a 5 galloon bucket of left over d=stucco paint from my house, can I use this. Are there any special prep. procedured I need to do. Obviously make sure the wall is clean.
 
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Old 09-21-06, 07:33 AM
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Your stucco paint should be fine for a top coat on your wall. If the block is unpainted it will first need to be primed. Use blockfiller unless it is a retaining wall, then it would be better to use a product like drylok which will both prime/seal the block and help to protect the paint from moisture traveling thru the block.

Small cracks can be filled with caulking but any major cracks should be filled with mortar prior to painting.
 
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Old 09-21-06, 01:48 PM
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Where can i get block filler at. Will this also help with moisture (sprikler, rain,etc...). It is a block wall about 8 ft. high that splits my backyard with my neighbors.
 
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Old 09-21-06, 04:33 PM
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Block filler can be purchased at any paint store.

Is the other side of the wall painted? Wind driven rain can cause problems if 1 side is painted and the other is not.
 
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Old 09-21-06, 11:16 PM
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Will the paint bleed through
 
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Old 09-22-06, 05:22 AM
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Blockfill primes and fills the pores of unpainted block. If there are any ink or other unusual stains they should be sealed with a stain hiding primer. Other than that there shouldn't be any problems with colors bleeding thru.
 
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Old 09-22-06, 01:37 PM
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Sorry I was a little confused, is blockfill the same as primer or different? Thanks for the help.
 
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Old 09-22-06, 03:15 PM
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Blockfiller is a primer specific for raw masonary. It's main purpose is to fill the pores so that the finish coat won't soak in and almost disappear.

Stain blocking primers are almost always solvent based and their main function is to prevent stains from bleeding thru and affecting the top coat.
 
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Old 09-22-06, 04:05 PM
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thanks for the help
 
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Old 09-22-06, 07:45 PM
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Painting a block wall

The only problem with solvent based blockfills is that if they are applied very thickly and are back-rolled, they can effectively act like a vapor barrier is some climates (single wythe masonry walls in a very cold climate).

As marksr said, they normally work well and should do so especially in your climate with the type of block that are manufactured there.

Dick
 
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Old 09-23-06, 04:56 AM
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Just to clarify, most blockfillers are latex based. Some waterproofing block filler/sealers are solvent based. Latex blockfiller should be fine. Primers to hide stains are formulated different. I would recomend priming the raw block with latex blockfiller. If any stains bleed thru the block filler, these areas only would benifit from a solvent based primer designed to hide stains.
 
 

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