Return to the Home Repair Forum | Post a Follow-Up

Sealing drafty gas fireplace (crosspost)

Posted by greenbean08 (My Page) on
Thu, Mar 25, 10 at 2:24

I also posted this on the FP forum earlier but I thought it might be a good idea to ask here as well.

I have a gas fireplace that has a pretty significant breeze coming from the bottom vent area when the north wind blows.

Here's the problem (click to enlarge):

From misc

This does not lead directly outdoors. The breeze seems to come through the direct-vent chimney, around the back of the fireplace and out this hole. What can I safely use to seal around this gas pipe under my fireplace? Thanks!

Follow-Up Postings:

RE: Sealing drafty gas fireplace (crosspost)

Time to move along...

RE: Sealing drafty gas fireplace (crosspost)

fire rated caulk.
with the size of the gap you would have to apply the
caulk in stages allowing it to dry between applications.
you should also take a look in the attic to see if
the area is sealed also.
I have seen fire rated foam...but know that foams
shrink and don't seal over time.with caulk you have
control over the application..foam doesn't allow you
that control.
caulk will expand and contract, foam will shrink and
pull away from area being sealed,
this is based on my experience, and testing.
best of luck.

RE: Sealing drafty gas fireplace (crosspost)

I ended up having the furnace guy look at it today while he was here (I was overdue for a cleaning anyway). He patched it by cutting 2 small squared U-shape pieces of sheet metal, slipped one on each side of the pipe and taped it with the shiny duct-sealing tape. We'll see how it does!

 o Post a Follow-Up

Please Note: Only registered members are able to post messages to this forum.

    If you are a member, please log in.

    If you aren't yet a member, join now!

Return to the Home Repair Forum

Information about Posting

  • You must be logged in to post a message. Once you are logged in, a posting window will appear at the bottom of the messages. If you are not a member, please register for an account.
  • Please review our Rules of Play before posting.
  • Posting is a two-step process. Once you have composed your message, you will be taken to the preview page. You will then have a chance to review your post, make changes and upload photos.
  • After posting your message, you may need to refresh the forum page in order to see it.
  • Before posting copyrighted material, please read about Copyright and Fair Use.
  • We have a strict no-advertising policy!
  • If you would like to practice posting or uploading photos, please visit our Test forum.
  • If you need assistance, please Contact Us and we will be happy to help.

Learn more about in-text links on this page here