Re roof questions

Lugnut · 10-26-2009, 09:06 PM

I am going to install a roof over the old one. The deck is sound, and the shingles are flat with no leaks. Do I have to re flash the chimney to the new shingles, or leave the old flashing in place? I will replace the vent pipes. Do they go on top of the old shingles, and under the new?
Thanks in advance!

BamBamm5144 · 10-27-2009, 06:09 PM

Roof it like its a new roof. FYI, putting another layer over an old does not let you know if any roof deck problems and it also decreases life expectancy for the new shingles.

Lugnut · 10-28-2009, 01:35 AM

Thanks, that is what I figured. As for the re roof life, I think that may not be so. I always heard that, but my mother in law just had her roof done. That roof lasted 47 years and it was over a layer

. I am going to go for it. My roof is sound, the shingles are flat, and there are no leaks. The roof is tongue and groove with 2x8s, and no mold or dark spots visible from the attic.

eisert · 10-28-2009, 08:35 PM

Quote:

Originally Posted by Lugnut

Thanks, that is what I figured. As for the re roof life, I think that may not be so. I always heard that, but my mother in law just had her roof done. That roof lasted 47 years and it was over a layer

. I am going to go for it. My roof is sound, the shingles are flat, and there are no leaks. The roof is tongue and groove with 2x8s, and no mold or dark spots visible from the attic.

It is so. Your mother in laws roof is the exception to the norm. I've roofed over 1000 houses, and trust me, it shortens the life of the new shingles. Not to mention the added weight on your roof.

BamBamm5144 · 10-29-2009, 09:23 AM

Perhaps her roof lasted 47 years before it started to leak but maybe she needed new one years before that. My neighbors 3 tab roof needs to be replaced so badly that it looks like a dimensional shingled roof. He keeps telling me theres plenty of life in it because he hasnt seen any water on the inside. Trust me and Eisert, the life expectancy of the roof will greatly decrease.

Lugnut · 10-29-2009, 10:10 AM

Thanks everyone!
You cannot see her roof from the ground, so I do not know what it looked like. All I do know is that it finally started to leak after a few shingles showed up in her yard.

12penny · 10-29-2009, 10:11 AM

Lugnut...might wanna check with the manufacturer as well. Make sure they'll cover it, installed over another shingle.

Lugnut · 10-29-2009, 10:18 AM

Landmark lifetime. As I read it, it is covered.

10-26-2009, 09:06 PM	#1
Lugnut Newbie Join Date: Oct 2009 Location: NJ Posts: 10	Re roof questions I am going to install a roof over the old one. The deck is sound, and the shingles are flat with no leaks. Do I have to re flash the chimney to the new shingles, or leave the old flashing in place? I will replace the vent pipes. Do they go on top of the old shingles, and under the new? Thanks in advance!

10-27-2009, 06:09 PM	#2
BamBamm5144 Member Join Date: Oct 2009 Location: Wisconsin Posts: 132	Re roof questions Roof it like its a new roof. FYI, putting another layer over an old does not let you know if any roof deck problems and it also decreases life expectancy for the new shingles.

10-28-2009, 01:35 AM	#3
Lugnut Newbie Join Date: Oct 2009 Location: NJ Posts: 10	Re roof questions Thanks, that is what I figured. As for the re roof life, I think that may not be so. I always heard that, but my mother in law just had her roof done. That roof lasted 47 years and it was over a layer . I am going to go for it. My roof is sound, the shingles are flat, and there are no leaks. The roof is tongue and groove with 2x8s, and no mold or dark spots visible from the attic.

10-29-2009, 09:23 AM	#5
BamBamm5144 Member Join Date: Oct 2009 Location: Wisconsin Posts: 132	Re roof questions Perhaps her roof lasted 47 years before it started to leak but maybe she needed new one years before that. My neighbors 3 tab roof needs to be replaced so badly that it looks like a dimensional shingled roof. He keeps telling me theres plenty of life in it because he hasnt seen any water on the inside. Trust me and Eisert, the life expectancy of the roof will greatly decrease.

10-29-2009, 10:10 AM	#6
Lugnut Newbie Join Date: Oct 2009 Location: NJ Posts: 10	Re roof questions Thanks everyone! You cannot see her roof from the ground, so I do not know what it looked like. All I do know is that it finally started to leak after a few shingles showed up in her yard.

Re roof questions