*
I have a house built in 1921. It has a standing seam metal roof over the large front porch. The roof is designed such that water runs to a small channel at the roof edge. This channel leads to down spouts located at each corner of the porch. In wet conditions, I get water dripping from the soffits underneath the channel in certain locations where water tends to pool. Several years ago, I had a respectable contractor install a rubber membrane in the channel. That solved the problem, until I replaced the soffits (which were rotten from all the leaking water).
Now, water must be seeping under the membrane. Any product or process I can use to reseal it? What is the best solution for fixing the problem (aside from replacing the roof).
Discussion Forum
Discussion Forum
Up Next
Video Shorts
Featured Story
Learn how to plan, fabricate, and install a chute to conveniently send your dirty clothes from an upstairs bathroom or hallway to your laundry room below.
Featured Video
Builder’s Advocate: An Interview With ViewrailHighlights
"I have learned so much thanks to the searchable articles on the FHB website. I can confidently say that I expect to be a life-long subscriber." - M.K.
Replies
*
Rob - 1921 is likely to be a terne metal roof. One of the problems, particularly on porches, is that they rust from the
i underside
and don't look as bad on the top as they really are. I'd really be inclined to recommend that you consider replacing this roof with standing seam lead-coated copper, standing seam copper or Follansbee Terne II. You'll probably get some posts about ditching the internal gutter but in a whole-roof rehab, if done by a competent roofer, this shouldn't be necessary. If you use Terne II you can use TCS (Terne Coated Stainless) gutter lining, which will be around long after you and I are dead. These materials are solderable and repairable. (PS - Hope you backprimed your soffit materials). Yes, this is an expensive approach, around here copper is running about $1,500/SQ (100 SF).
If you just can't see replacing it, you can click here for a case study on AcryMax, an acrylic roof coating. I've spoken with the owners and after a year this coating is still going strong.
PS - You didn't say whether or not this roof had a
i color.
Many terne roofs were painted red, green or gray. If maintaining a color is important, the AcryMax coating system or new Terne II may be the way to go since painting (and maintaining paint) on lead-coated copper or copper is somewhat difficult, while Terne II
i must
be kept painted, and there are several colors available in their RapidDri product line.
Jeff
*
I have a house built in 1921. It has a standing seam metal roof over the large front porch. The roof is designed such that water runs to a small channel at the roof edge. This channel leads to down spouts located at each corner of the porch. In wet conditions, I get water dripping from the soffits underneath the channel in certain locations where water tends to pool. Several years ago, I had a respectable contractor install a rubber membrane in the channel. That solved the problem, until I replaced the soffits (which were rotten from all the leaking water).
Now, water must be seeping under the membrane. Any product or process I can use to reseal it? What is the best solution for fixing the problem (aside from replacing the roof).