i’ve got a second floor rec room with cathedral ceiling, r-30 fiberglass in the rafter cavity propervent the entire way from soffit to ridge vent there is a 5′ crawl space at each side v-match boards on the interior. the roof in question faces north and condensation is forming as frost on the inside of the rafter space . Now this wouldn’t be a big deal but with a big tempature swing the frost melts and collects and runs through the insulation into the room and down the inside wall of the garage below which is a heated space as well ( woodstove ). I don’t know if this is enough info but any ideas wood be great. hopfully i can figure this out without ripping the inside apart completely
A properly installed 4-in. corrugated drainage pipe running under a driveway can withstand the pressure of a 40,000-lb. truck.
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