Mansard Problems

natty: I'm not saying the word lawsuit to these folks. I told them it was incorrect, but I was wondering if they would go that route.

I manually sealed every shingle on my last mansard, I've been sleeping great since.

clvr83 Said: I have a client who I picked up a couple of years ago. They had this mansard re-roofed in 2009. Its about 160 squares, from the most expensive crew around. I really have respect for the owner, but they messed this one up.

You'd be best served if you hand nail it. The nails need to be driven tight and flush. Even looking flush, but not tight won't work. With a hammer, you can seat them perfectly. We have buildings all around here and all losing shingles. Mine are still in place, though a few have melted sealants streaking the roofs.

One of mine 16-18 years old.

I've heard of and actually seen this thing called "Wide Trak" nail line from CertainTeed.....Never used it or paid any attention to it.

I believe it was "engineered" (LOL :laugh: :laugh: :laugh: :laugh: :laugh: LOL) for the "Big Dog Roofing" companies.

To be fair to the Salesmen, oops I mean "Engineers" ( LOL :laugh: :laugh: :laugh: :laugh: LOL) at CertainTeed, this fine fine line is not to be used over an 8/12 slope

Right on.

The nailing on this one was CLOSE to the line, but close obviously isn't good enough. Them bottoms just keep slipping. I can't recall, but I think they are six nailed. We will be using a nail gun though, my guys don't like it when I mention taking them away for anything more than a repair. :laugh:

seen-it-all - I was just telling a group of people how roofing is deceptive like that. It's easy to put one on that looks good and doesn't leak for a few years, but 10 years+ is where you (edit: start to) separate the roofers from the wannabe's.

Roof dude pretty well nailed it on all counts. This one is a good example how hand nailing would have probably prevented the current problems. When dealing with a near vertical slope you need the nail to catch both sections of the lamination on the nail line (I don't think the nail zone shingles would work here) as well as not being driven too deep. Hard to achieve with an air driven tool on a consistent basis when dealing with temperature variations. Have done a few with no problems. Have also seen many and the song "Slip Sliding Away" comes to mind.

Reminds me of the big dog roofing company that made the paper a few years back with a picture of them roofing the many steeples on a large church. A few years later big dog was gone and the laminates from the steeples were falling on the peoples as they walked by on the sunny hot days. The church was barricaded off for a few years while they raised money to install wood shakes.

Every one I've seen like this.... wasn't nailed worth a damn. Can't say I've done one that was completely vertical though.

Most of em I've ever encountered, had a slight pitch to em. While, I normally 6 nail shingles on a pitched roof, I would put even more in something like this. If I remember right, the last mansard I put shingles on, we put minimum 8 nails/shingle.

I think temp matters in a situation like this too. Definitely want to hit the sweet spot of temps/uv rays when installing. Over or under driven nails will wreak havoc on a mansard installation imo.

I would be willing to bet, without seeing this in person, that the fasteners are lacking in numbers, placement, & correct seating.