Exterior-facing wall in bathroom had zero insulation. House is in Philadelphia. Exterior: Brick; Interior: Cinder block, 3/4" air space, furring strips, metal mesh, several inches of mortar, then tile. I removed everything, down to the cinder block. My concern is getting the best possible insulation and air flow stoppage, without creating a potential moisture/mold issue. Here's what I'm dealing with. Advice and suggestions are greatly appreciated - the more I'm researching it, the more confusing it's getting!
Hi all:
[color=#383a3b]Moved into a new place last fall, so the problem didn't become evident up until now. Upstairs bath is right under the unventilated asphalt shingles roof (2x6 joists), and ancient exhaust light/fan would get scorching hot when it barely got to low 80's. The rest of the ceiling has R-19 and seems to be doing a great job. Heat spot is due to the lack of the insulation.[/color]
[color=#383a3b]Replaced with low profile IC rated fan/light combo mounted outside on the drywall and that gave me 4 " clearance inside the joists. First tried to get fancy with double radiant barrier layer at 2" gaps, and it doesn't do much once temperatures start approaching the 90s. Realistically the space only allows for effective use of R-13, but I feel that with summers here going often into mid-90's that's not the greatest solution.[/color]
[color=#383a3b]What would you recommend? Any help is much appreciated. While I can certainly relocate the light, exhaust fan must stay.[/color]
[color=#383a3b]Thank you.[/color]Read More
Looking for advice on adding rock wool as shown in the photo. I am in south Louisiana, so mostly hot and humid. This is a metal building house with 3” closed cell spray foam on ceiling. I had some R-13 mineral wool insulation left over and would like to put it on this second floor loft ceiling to help with noise/heat.
would the small airspace between the closed cell and mineral wool cause any problems with condensation or other issues? Thanks for any help.
[img]https://cimg2.ibsrv.net/gimg/www.doityourselft.com-vbulletin/2000x1504/3bf9fced_9dcb_45bb_85d1_1cad6f8e007c_57a7f145112d90367947928462bf4f85f1b89304.jpeg[/img]
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08-08-22, 11:17 AM
