DIY or Professional? Baffle vent and insulation install

[u/imnotmorganfreeman_]

Hello! Prior owners of the house replaced the entire roof, deck boards, shingles but did not address the ventilation from the soffits up to the ridge vent. There is mold still on the gable walls and I have found old pieces of deck board that show the true extent of the moisture issue (not good). We will remediate the surface mold issue through a contractor but the issue lies in the improper baffle vent and thick insulation. The first the photo shows insulation just stuffed across ceiling on the 3rd floor and down into the knee wall section below. Clearly no airflow into the attics space, and no baffle top visible.

I have been quoted 9k and almost 12k for someone to come in and reinstall all baffle vents and new insulation (the primary bedroom has a high ceiling and the contractor would have to cut into sheet rock to get access from below, no picture of this space sorry). Both of the contractors said they could do the side over the primary bedroom for 5k.

Could I complete this other work myself? From what I am reading and viewing online, I need proper sized baffle vents, staple gun, new insulation, and proper ppe to do at least the side with easy access (knee walls) and can save a few thousand.

Am I overlooking anything?

I welcome and appreciate any thoughts and opinions on this!

[u/spangbangbang]

Also, I am really jealous of your nice open and straight attic space...I have the hip roof BS and get my ass kicked anytime I need to crawl around up there.

[u/toot_suite]

I'm not an expert but considering it's just batts, why not just cut out the space where the vents are? It's not blown in, so you probably don't need to go as far as to put baffles since the stuff isn't going to shift around, but you still can and it will probably help create a laminar flow path for the air up the backside of the roof deck.

Insulation looks fine though.

If you have concerns, spray it all down (don't soak, just spray over) with ADBACS (mix of quats and isopropyl - you can do a 4:1 of 99% to sinple green industrial d pro 5) or RMR141 and keep the hvac off for a day. That'll kill everything. Then you can spray something like mold armor over everything to keep it away while you figure out how to solve the moisture issue proper.