Brick facing popping

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1

Originally Posted By: jsmith3
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http://www.nachi.org/bbsystem/usrimages/P/P5060010.JPG ]

2

Originally Posted By: aslimack
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What did the cap look like? Cracked, or recently replaced? Do you have a wider shot?


Adam, A Plus

3

Originally Posted By: jsmith3
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Adam the cap looked good and original, this was my best shot. These brick were isolated, there were only 4 like this on the whole chimney and it was large and ran from the ground.

4

Originally Posted By: lkage
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Jon,


Here's an article on sealing masonry:

http://www.masonrymagazine.com/4-03/sealing.html

...and one product available:

http://www.chemicalproductsokc.com/sw-244-40_voc.htm

Your pic shows cracks and deteriorated/shrunken mortar that may also require re-pointing. I'd refer it to a qualified masonry contractor for eval to prevent further damage.

--
"I have never met a man so ignorant that I couldn't learn something from him."
Galileo Galilei

5

Originally Posted By: mkober
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Almost looks like those bricks are being thrust outwards by concentrated point loads. My guess would be the brick mason inadvertantly allowed a few wooden spacer blocks behind those bricks, and when subject to moisture and freeze-thaw cycles, the blocks are forcing the bricks outward. I’ve seen similar reactions with spacer blocks remaining inside of concrete wall placements–they will spall the concrete right off of the face.

–
Michael J. Kober, P.E. and H.I.


"NACHI Member and Proud Of It!"
6

Originally Posted By: lkage
This post was automatically imported from our archived forum.


mkober wrote:
My guess would be the brick mason inadvertantly allowed a few wooden spacer blocks behind those bricks, and when subject to moisture and freeze-thaw cycles, the blocks are forcing the bricks outward.


Good theory.

--
"I have never met a man so ignorant that I couldn't learn something from him."
Galileo Galilei
7

Originally Posted By: jsmith3
This post was automatically imported from our archived forum.


The bricks are delaminating, approx 1/4-3/8 thick across the entire brick.


Jon