When the roof project was being done, the roofer scrapped the gravel off above the tongue and grove deck area’s leaving the layer of tar from the old system. Under that was a layer of fiber
like insulation sitting on top of the tongue and grove, nothing else. Inside the home there are two ceiling styles, exposed tongue and grove with beams, other area’s are sheet rock finish with insulation batting above. So above the finished area’s is plywood decking not tongue and grove and they scraped off all the old system to the deck and applied like a roll paper before mopping the hot tar that holds the insulation in place. The entire roof now has 4″ of ISO insulation which is mopped down in hot tar, no screws or nails, then the membrane was also mopped down in hot tar, no screws or nails. Fiber Tite Fleece Back membrane is the type that has to be hot welded at the seams, which I felt was better then the systems that use tape. The roof was installed in 2003 and the cannon shot type bang only happens in the cold winter months, temps below 30 degree’s F*, at night. Thank goodness it does’t go on in the summer months, have to catch up on sleep.
A roofer here says that it is the deck moving which causes this noise. I never had any problem with noise until I had this system
installed, good old tar and gravel. I feel I wasted thirty thousand dollars on this new system and now look to spend a great deal more to try and figure out what is causing the noise.
Thank you for taking the time to talk with me, any ideas you have to pass along, I appreciate it.
P.S. I have attached photo’s of a test cut and vents that were installed this year.