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120+ year old house in Maryland. Seeking guidance on insulating under stairs.
Hello. I'm seeking guidance on sealing this space in a 120+ year old house in Maryland. Lidar photos included. The subfloor is a hatch that leads to the crawlspace. The walls are 1x sheathing with roughly 1" gaps between them. We're experiencing funky (mildew) type smells on the top side of the steps with airflow coming up from the crawlspace - primarily after a rain event. Photos of gaps in steps included. I don't expect an old house to be tight but I think I can mitigate the smell and temperature swings. This space gets quite cold in the winter and warm in the summer. The thermostat is on the right wall on the finished side. The crawlspace is "encapsulated" with a commercial dehumidifier. Using quotes because it's an old house and I don't expect to fill every gap, but the primary goal was to protect the air handler. We sit high on top of a hill with downward slopes in every direction. We're also mitigating rain water on the exterior by installing 4" PVC attached to the downspouts and running away from the house with some additional fill, grading, and sloping away from the foundation. We've experienced nail pops in drywall on the finished sides due to the temp and humidity swings coming up from this space. I'm considering removing the 1x, foam sealing gaps on the unfinished side, installing insulation, and drywall. On the top side, we'll likely caulk and install additional trim on the stairs. I'm seeking guidance on alternative approaches vs the proposed. Would you use rock wool vs fiberglass? Faced or unfaced? If faced, should the faced side face the inside of the unfinished area? Should we also drywall the under side of the steps themselves? Excuse the vacuums, etc. The ducting is the split return for the HVAC. Any advice is appreciated. submitted by /u/hydrogenpsychosis [link] [comments]
| | Hello. I'm seeking guidance on sealing this space in a 120+ year old house in Maryland. Lidar photos included. The subfloor is a hatch that leads to the crawlspace. The walls are 1x sheathing with roughly 1" gaps between them. We're experiencing funky (mildew) type smells on the top side of the steps with airflow coming up from the crawlspace - primarily after a rain event. Photos of gaps in steps included. I don't expect an old house to be tight but I think I can mitigate the smell and temperature swings. This space gets quite cold in the winter and warm in the summer. The thermostat is on the right wall on the finished side. The crawlspace is "encapsulated" with a commercial dehumidifier. Using quotes because it's an old house and I don't expect to fill every gap, but the primary goal was to protect the air handler. We sit high on top of a hill with downward slopes in every direction. We're also mitigating rain water on the exterior by installing 4" PVC attached to the downspouts and running away from the house with some additional fill, grading, and sloping away from the foundation. We've experienced nail pops in drywall on the finished sides due to the temp and humidity swings coming up from this space. I'm considering removing the 1x, foam sealing gaps on the unfinished side, installing insulation, and drywall. On the top side, we'll likely caulk and install additional trim on the stairs. I'm seeking guidance on alternative approaches vs the proposed. Would you use rock wool vs fiberglass? Faced or unfaced? If faced, should the faced side face the inside of the unfinished area? Should we also drywall the under side of the steps themselves? Excuse the vacuums, etc. The ducting is the split return for the HVAC. Any advice is appreciated. [link] [comments] |
