mjr6550 Posted July 15, 2015 Report Share Posted July 15, 2015 I posted this question on another forum, but no response so far. I have seen this material (looks like asphalt coated kraft paper) used as an underlayment on two roofs. Both were modular homes built by Excel Homes in PA. This one was built 1995, the other about mid 2000's. Anyone ever see this used? How they get away with this baffles me. Click to Enlarge 59.8 KB Quote Link to comment Share on other sites More sharing options...
Tom Raymond Posted July 15, 2015 Report Share Posted July 15, 2015 Manufacturers choose a market segment and then make the product fit. Code says underlayment, consumer doesn't know or doesn't care. Easy place to cut costs. Quote Link to comment Share on other sites More sharing options...
inspector57 Posted July 15, 2015 Report Share Posted July 15, 2015 I think the "manufactured homes" part is how they get away with it. Different rule books. My mistake, you did say "modular". Quote Link to comment Share on other sites More sharing options...
Jim Katen Posted July 15, 2015 Report Share Posted July 15, 2015 You guys put underlayment below the shingles on manufactured homes in PA? I'm impressed. Quote Link to comment Share on other sites More sharing options...
Chad Fabry Posted July 15, 2015 Report Share Posted July 15, 2015 I just replaced a roof with that underlayment. It was horrible. There were bits of it flying all over the yard- it added 10 hours to the clean up time. It also added huge risk - it isn't stapled down so when you strip the shingles and step on a piece it's like stepping on a ball bearing. Clearly, it's installed while the roof deck is perfectly horizontal. Quote Link to comment Share on other sites More sharing options...
mjr6550 Posted July 15, 2015 Author Report Share Posted July 15, 2015 Just to be clear, I did not say manufactured. I said modular. They built these homes to the BOCA building code and are required to hire inspection agencies to inspect in the factory. I can imagine that some private inspection agencies may overlook some code issues rather than risk loosing the ongoing work. Yes, the stuff falls apart. It appears similar to the paper backing on insulation, but has a smoother surface and is very brittle. I'm not sure you would use the stuff for. I was wondering if this could be the cheapest form of stucco underlayment. Any west coast inspectors ever see anything like this behind stucco? Quote Link to comment Share on other sites More sharing options...
mjr6550 Posted July 20, 2015 Author Report Share Posted July 20, 2015 FWIW, I think the product below is probably what was used. It is intended to be a flooring underlayment. http://www.jacksonbp.com/products/lsu-30-30-30.html Quote Link to comment Share on other sites More sharing options...
Nolan Kienitz Posted July 21, 2015 Report Share Posted July 21, 2015 FWIW, I think the product below is probably what was used. It is intended to be a flooring underlayment. http://www.jacksonbp.com/products/lsu-30-30-30.html If indeed it was used ... it was probably what was left in the shop, manufacturing site or on the truck. Waste not ... want not! I recall my Dad telling me that growing up on the farm. Quote Link to comment Share on other sites More sharing options...
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