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Old 04-09-2011, 12:07 AM   #31
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Leaking Ceiling, Do I Need a Roofer?


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Originally Posted by seeyou
If the brick did go all the way down on the backside (the side on the house) would it not eventually stop where the fireplace is and leak in or on the fireplace? I just don't see how the water would disperse if the brick continued all the way down just to the fireplace.

OK - here's where terminology is very important. You have a pre-fab fireplace and chimney. In your case, the chimney is the metal pipe. You have a wooden chase built around the fireplace. That chase has brick veneer on it. That brick veneer could have been vinyl or any other type of siding or masonry. Everything outside of the metal prefabricated chimney is strictly decoration.

If you had a full masonry fireplace, the whole thing would be built out of brick/block/stone. It would have much mass and need it's own foundation.

A lot of people don't know the difference between the two type units. All they know is they bought a house with a wood burning fireplace. What you have is much, much cheaper to install than a full masonry fireplace. Maintained and operated properly, it's no less safe and in some instances can be more efficient. But they are two different animals and the flashing details are completely different. But many roofers just see a chimney and can't differentiate between the two.

What's so confusing about the installation instructions? I'll translate.

excellent stability against alkali, infiltration of dirt and water, frost damage, and efflorescence

It keeps the water out. It also does other things.

HMK S31 is an invisible below surface seal, with 100% vapor permeability

It penetrates instead of dwelling on the surface. If water gets in some other way it can get back out. You can't see it after it's applied.

Brush it on. Wait 10 mins. Brush on another coat. Remove any runs. Don't get it on anything you don't want it on. Don't let it rain on it for 2-3 days. Don't apply above 85F or below 50F. Don't drink it or smoke when you're applying it. Wear gloves.

Look at any can of paint. Pretty much the same instructions. Good luck.
Thanks again for the info. I realize that my fireplace is prefab and cheaper than a full masonry. I was just thinking that what we discussed before, the brick on the chase ends where the chase meets my roof, as seen in the pic above taken in my attic. It was mentioned if the brick continued down, the water would disperse lower into the ground. Wouldn't the brick of the chase stop before actually getting to the ground, at least on the backside because of the prefab insert? Maybe I'm over thinking it but I just want to make sure I don't sound like a fool to contractors giving estimates.

Thanks again for all the info. Sorry if I'm becoming a pest with all the questions.

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Old 04-09-2011, 03:24 AM   #32
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Leaking Ceiling, Do I Need a Roofer?


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Originally Posted by Phreek View Post
Thanks again for the info. I realize that my fireplace is prefab and cheaper than a full masonry. I was just thinking that what we discussed before, the brick on the chase ends where the chase meets my roof, as seen in the pic above taken in my attic. It was mentioned if the brick continued down, the water would disperse lower into the ground. Wouldn't the brick of the chase stop before actually getting to the ground, at least on the backside because of the prefab insert? Maybe I'm over thinking it but I just want to make sure I don't sound like a fool to contractors giving estimates.

Thanks again for all the info. Sorry if I'm becoming a pest with all the questions.
The only instance where the brick would "continue down", would be if you had a full masonry fireplace. You don't.

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