Replies

1. 
   Mike_Smith | Oct 17, 2000 03:52am | #1

   *
   sounds like a shingle defect...

   get ahold of the mfr's rep thru your supplier... they will either give you a kit to submit a sample or come out and inspect the roof...

   then they'll negotiate a settlement... 6 years is weird......

1. 
   JRS | Oct 17, 2000 04:44am | #2

   *Often times with laminated shingles, if the nails aren't directly on the nailing line (read the instructions), the lower lamination is only held on with the factory glue. What happens is the glue heats up and gets soft and the lower lamination slides down.The steeper the roof the more likely they are to slide.When nailing these shingles, if the nail is only an inch too high it can miss that lower half entirely. That is usually the reason for the problem you describe.John

1. 
   Jerry_Hill | Oct 17, 2000 05:01am | #3

   *Mike...mfg. rep started questioning the nailing almost as soon as we started to explain the problem . I think John has solved this one ...thanks.

1. 
   Mike_Smith | Oct 17, 2000 05:38am | #4

   *jrs.....so, that's it... that's why i see so many bottoms askew on roofs as i drive by... always look for the obvious... the nails not in the right place....laminated shingles or any other kind.. that's teh easiest way to void the warranty... not following the mfr's nailing instructions.....

1. 
   Stephen_Hazlett | Oct 17, 2000 03:23pm | #5

   *I think JRS is probably correct about the nail placement. In fact,in the september issue of RSI(Roofing,siding insulation) there was a brief discussion of a meeting with the Asphalt Roofing Manufactures Association regaurding "impossibly stringent"nailing requirements.Given the way these shingles are constructed it is pretty difficult to 100% follow the manufactures nailing pattern.PARTICULARLY WITH A GUN. There is very little room to get the nose of the gun into the narrow horrizontal area specified for nailing.When you take into account that most shingles are now installed with guns,wouldn't it make sense to produce shingles that accomodate the use of guns with a wider nailing area? In fact the nailing area on laminated shingles can be so narrow that it isn't all that easy to maintain any kind of production hand nailing either----I have seen plenty of roofers routinely miss the target area hand nailing.I can only assume that the ARMA wants the installer to void the warranty.Regaurding warranties: what good is a warranty if the manufacture files bankruptcy. Anyone notice that Owens Corning filed for bankruptcy as a result of asbestos litigation. Try collecting on those properly installed shingle warranties now!(Remember Johns/ Manville?Good Luck all,Stephen

2. 
   JRS | Oct 18, 2000 12:36am | #6

   *Hi Stephen,I always wondered why, as much extra as they charge for laminated shingles, it would kill them to add one inch more to the lower shingle. It would just about eliminate that problem. BTW-it's my understanding that O.C. bancruptcy will not affect warranty issues. John

2. 
   Jerry_Hill | Oct 18, 2000 12:36am | #7

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   Looked at a 6 year old roof job today.The dimensional shingles appear to have horizontal cracks ,delaminating and litterally sliding off the roof .Are they defective or what?No apparent other problems...ventilation etc.