fireplace
I have a stone fireplace and just installed a new door. But there's gaps because the stone is irregular. I tried using fireplace cement from the inside but it's hard to get in there and keeps falling out.
Is there any better material I can use? Some kind of sealant that won't burn up?
Thanks
Did the transparent glass "back wall" explode because you added the front side glass doors and as a result the temperature in the fire box area went way up???
You need to consider carefully the airflow and draw requirements of the fireplace and the chimney that vents it out through the roof. Changing the design can really change the temperatures of the internal space!!
I would think that if you were to block off the far side with bricks that you may need to line the inside of the brick with special heat resistant fire bricks. Regular bricks could get extra hot and shatter too.
If you really need to have the front side glass doors make sure that there is a part of the design that permits the proper amount of air flow in around the sides of the door assembly for the chimney draw to work correctly.
Buy a small bag of concrete floor patch: it mixes like pancake batter and sets a light gray. This is what you fill that gap with. It gets hard as concrete and will adhere to the existing stone. If you don't want it to stick to the wood then mask off the wood before. It also helps to protect the top of the wood with masking tape. If you need more of a curb effect form at the edge of the hardwood with the propped height wood strip and remove when patch is dry. I have a picture of something like it:
Best Answer
the best way to this is with fiberglass gasketing, sometimes called door rope. its just a fiberglass rope. you get some hi-temperature sealant for same, inject into the area it is to fill so that it covers stone and the metal assembly. then, rub it all over the rope (cut to the right length ahead of time) and then simply squeeze into the gap. different diameters might need to be used, but usually one will do. tape off all adjacent areas and where gloves as the sealant is quite gooey and makes a big mess. wipe the area off with acetone after to clean up prior to removing the tape
http://www.mcmaster.com/#high-temperature-seals/=103j65h
http://www.mcmaster.com/#high-temperature-sealants/=103j5zd
they will sell something similar at your local big box building store