Cathedral SIPs are sweating in summer
I have a new home built with SIPS, closed cell polyurethane, R40 roof and R24 walls. The SIPs were installed/built spring of 2014, we moved in Feb 2015. The home is timber frame with Metal unvented roof, the roofer did use vertical furring strips and double bubble over felt. We live in KY and are just now getting into high humid summer, and our center ceiling beams are dripping wet throughout the day, causing small puddles on the floor. The ceiling is hot to the touch at the very peak on either side of the center beam. I believe hot outside air is leaking in. This issue just started and I plan to start calling folks on Monday, builder, SIP manufacture, then timber frame manufacturer until I get an answer. Does anyone have a solution on how to fix? The seams do not have tape on either inside or out of the SIPS, so that would be my first thought, but none are accessible from in or outside. I couldn’t sleep last night thinking how this cost our family over 32,000 for the SIPs and the first summer are failing. Not sure if it matters, but we have spray foam under the rest of the house roof (non cathedral), but SIP walls throughout. The spray foam is doing great the attic is cool and the foam is the all over.
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