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-   -   Tied in Porch Roof to Existing Roof - Leaking (http://www.diychatroom.com/f9/tied-porch-roof-existing-roof-leaking-97396/)

bharling 03-06-2011 08:16 AM

Tied in Porch Roof to Existing Roof - Leaking
 
1 Attachment(s)
I had a contractor build a new porch roof on the back of my house and he had to tie in to the house roof to get enough pitch. I tried to attach a picture - not sure if it worked. He did a great job constructing it, but the roof is now leaking. he came back and added ice dam material where the two roofs meet, but it is still leaking. It looks like where the new roof lays on the old roof, there is a 1/2 or 3/4 inch dip (the thickness of the plywood) and the water is backing up there and then getting under the shingles, even though it is tarred and he added the ice dam material. Now, he says the only way to fix it is to rip the roof off completely and make it all one piece.....any other alternatives/suggestions would be appreciated.Attachment 30572

waterman1971 03-06-2011 09:11 AM

I am not trying to nitpick, but from the pictures, it does not look like you have anywhere near enough slope for composition shingles.

bharling 03-06-2011 09:26 AM

I have no idea. The new porch roof, which is the new white portion coming off to the left in the photo, comes out about 12' from the back of the house and it does drain off.

bharling 03-06-2011 09:29 AM

rather, it comes off about 12' from the back of the main taller portion of the house, so the part where it is tied into the lower portion of the house is actually about 15' out...kinda hard to explain. i just can't imagine the only way to get it not to leak is to rip off the entire roof of the lower portion of the house and tie it all in - there has got to be another way.

waterman1971 03-06-2011 09:34 AM

The siding looks like double 4". Rake cut looks to be around 4'. That gives you 2" of drop for every 12" of run.

The slope of the new porch is less than that.

I would be concerned with a 2/12 slope to begin with.

Anything less than that, in my opinion, is not suitable for composition shingle application.

Just my opinion, best of luck!

waterman1971 03-06-2011 09:36 AM

Quote:

Originally Posted by bharling (Post 603533)
rather, it comes off about 12' from the back of the main taller portion of the house, so the part where it is tied into the lower portion of the house is actually about 15' out...kinda hard to explain. i just can't imagine the only way to get it not to leak is to rip off the entire roof of the lower portion of the house and tie it all in - there has got to be another way.

Not sure how everything ties in.

Perhaps you could do away with the shingles and put steel roofing on the low slope section.

tcleve4911 03-06-2011 09:37 AM

First question
Where is it leaking?

2nd question
Can you throw a ladder up there and take a pic for us?

3rd question
Has he been paid in full?

bharling 03-06-2011 10:03 AM

Thank you for all the replies! Unfortunately, there is snow on the roof right now, so can't see anything, but maybe it will melt later today or tomorrow. So, maybe there is another type of shingle or maybe steel? wouldn't that have to go all the way to the top of the back half of the house roof so it is all one piece? It is leaking at the end of the original overhang - you can see where the soffit was removed so we could see where it was leaking? It is leaking from the beam at the left end of that small section where the sofffit is missing. not sure if that is clear. of course, he is already paid. The work was done in October...took weeks for him to come back the first time and now he keeps saying he will come by but doesn't. I think he removed the shingles from the back of the house as far up as he needed to go and then framed out what he needed to get the slope on top of that and then tarred the seam where the new plywood met the old roof and then re-shingled. I tried to attach an old picture of when he was putting it up - if it works, you can see originally, he did not come to the end of the house, but i made him change that.

bharling 03-06-2011 10:08 AM

unfortunately, the file is to big to upload that prior photo.

waterman1971 03-06-2011 10:10 AM

Looks like it ties into the house siding on the left.

Did he remove any siding?

The detail where the roof ties into the house siding MUST be step flashed, if it is not, some type of sealant is the only thing that will prevent a leak.

If no siding was removed step flashing could not have been properly installed.

tcleve4911 03-06-2011 10:10 AM

A proper roof installation does not, and should not, require TAR.:no:

tcleve4911 03-06-2011 10:12 AM

Quote:

Originally Posted by bharling (Post 603560)
unfortunately, the file is to big to upload that prior photo.

Try compressing it with Picture Manager
or Photobucket

bharling 03-06-2011 10:47 AM

1 Attachment(s)
He did not remove any siding. Attached is a photo from when he was putting it on - not sure if you will be able to tell much from it though. Attachment 30578

bharling 03-06-2011 10:52 AM

Also, it is leaking from where the post is in the first picture, although the new roof section is tied in about halfway up the existing roof - it is getting in between the two and i guess is working its way down under the new roof section until it finds a way out, which is the beam where the post is, if that helps.

waterman1971 03-06-2011 11:03 AM

Bless your heart. I hope you stay with us, we will help you figure this one out.

More pictures would be a great help in resolving this issue.

When the snow clears please upload some.


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