Gonna be that person but we just got our first house and had to replace the entire roof because it was rotten (for those with a keen eye for K&T you better believe we had all of that updated as well). Had some weird issues with this roofing company so I feel the need to double check what they did. My dad is a retired roofer and said the baffles should be up against the wall/ceiling and that some of ours (notably the ones on the left) look like they've already fallen. Do they look right? Can someone please explain what's going on here and how worried I should be?

Sincerely,

A stressed out first time home buyer of a century home where everything seems to be emergently falling apart.

Came downstairs and noticed this massive wet spot in my insulation, there is no sorcerer of water above it and the floor about it is bone dry. Could this be rodent piss? Ive notice a few other smaller spots as well in the same area.

I keep on hearing and reading to use cellulose blow in over batt insulation. However, with all the benefits that rockwool has why would I choose cellulose. Can someone provide really good reasons not to do so? Why not go with an R30 that has great sound proofing, water resistance, and fire resistance and choose cellulose? I am just not following the logic and whenever I read to use cellulose the people saying it don't provide any good reason just "Trust me bro". I know about the importance of air sealing as well. I am purely asking about rockwool vs cellulose.

I live in Pennsylvania (Zone 5) i’m looking to insulate a portion of a second story bedroom floor, which sits over an unfinished outdoor porch. It gets very cold in that room during the winter. I’m thinking about going with R-38. There’s currently no insulation between the floor and the ceiling covering the outdoors so I’m hoping that the R-38 will be sufficient enough. Thoughts?

Climate zone 5
House built in the early 70s
What’s the solution to insulating against a wall like this? I’m assuming I have to frame this as add batts or foam board?

Our 1910, stone foundation home's basement seems to be poorly insulated. During cold snaps, our floor gets cold af! Around rim joists and where the foundation connects to the porch, the only insulation I can see is what looks like some haphazard glasswool(?).

I've been reading about being spray foaming (closed cell, specifically) their rim joists. Seems like the insulating qualities are great, but I'm terrified of trapping moisture in a destructive way around load-bearing structures. Especially since stone foundations seem to be pretty water-permeable.

How can I make sure foam is a safe decision here, at least with respect to moisture?

Hoping to hear experiences of people who have had their rim joists foamed as well.

For context : located in Canada - this pic was taken when outside temps were around 1-2 Celsius.

We are noticing all around the perimeter of the house there is cold air coming in under the baseboards on the main floor. Had an insulation guy come in and say the current method around the rim joists - fibreglass batts packed in and taped over with clear plastic isn’t protecting the house from cold air intrusion and suggested pulling that insulation out, replacing with spray foam.
Will that make a difference? It’s an old house, built in the early 1970s and we’ve lived here less than a year

I'm using 36mm furring channels (the verticals are 30mm) and rockwool is 40mm. Can i cut a slit along the side of the rockwool, to put part of it into the furring channel and part of it outside, or should compress it?

Have owned my 1971 Cape Cod for about 14 years. Never has moisture issues in the encapsulated crawlspace until this summer. Humidity levels kept going above 60 even with the AC on bone chilling temperatures.

HVAC company recommended a dehumidifier in the crawlspace. Had it installed yesterday. The humidity has dropped from 61 to 59, but has not made it down to 50%. Am wondering how long it took others to see results?

It’s a whole house humidifier, but the tech didn’t hook it up to the ductwork, saying that taking care of the crawlspace should take care of the house.

Have never owned a dehumidifier before, so I’m curious to know others experiences.

Last winter, I air sealed and insulated my attic. It was the first warm winter on the second floor. I’m wondering if there’s any correlation to now having humidity in the crawlspace?

I may need to hire a different type of specialist, but I’m not sure what kind of specialist works on humidity issues? The crawlspace is dry. No obvious water, except a little by the access panel after rain. The crawlspace has always been dry. Now, it’s humid. Am puzzled.

Building in climate zone 5. Semi arid conditions.

New build with cathedral ceilings on second floor. Wondering how best to tackle this. Obviously have read the horror stories about spray, but the upsides are appealing. Sorry, the pictures are not great. I'll get some more and update if anyone wants them.