loose bricks in fireplace
October 30, 2010 4:03 PM

What product should I use to repair loose bricks in a fireplace.

I want to seal only 2 maybe 3 slightly loose bricks and areas with loose mortar for this year, re-mortar them in spring.
I want to use a chaulk gun, would 3M FireBlock Sealant FB136 suffice?

the bricks are snug, the box is used 3-4 times a week, 8-10 hours. standard fireplace in home with no basement.
posted by clavdivs to Home & Garden (2 answers total)
You want fireplace mortar and I am not sure that this 3M product is a mortar. You can get fireplace mortar in a tube.

This is not something to mess around with. A bad repair puts your house at risk. If hot exhaust gases leak past the chimney into the walls they can start a fire, one which you will likely not notice until it is rather robust. If you have a few loose bricks you may have more. I recommend that you hire a professional to come in and inspect the entire chimney.
posted by caddis at 5:45 AM on October 31, 2010


Thanks-heading to ACE.
my insticts told everything about advice i sought in "the real world" was wrong the 'ok for this season' advice i got in the real word 'tickled' my building trades course in High school recollection. re-mortar has won the house-hold, no fire till it's done. I had it inspected last last year and the "sweep" advised i do it myself with the chaulk re-mortar. The system is fine, he even liked the size for a house with no basement and the ash-bin triple reinforced, dump your ash and never more, space for 50 years.
(house was designed by the orginal owner.)
I appreciate the caution as this is trebeld by flanked built-in wood bookcases.

as a side note I said in retort " thats like JB welding at spark plug"
CI:{)
tips his Bowler. thanks caddis for the link too.


the box was rated good other then afixxing the two loose bricks and re-grout.
(its just that soot and im not using TSP)
posted by clavdivs at 2:03 PM on October 31, 2010


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