Home inspector found mold in roof under sheathing in my garage. Mold professional says they spray a fungicide to kill it and then spray with a tinted paint. Extremely pricey! You cant clean it off because of the roof nails everywhere. Is this the only way?
I don't know if they will let you do it since it was found on an inspection but I would spray the area with 3% hydrogen peroxide and water mixture this will kill the mold if you want to seal it after dry regular paint should encapsulate the wood but if you use a marine grade anti fouling paint or a paint where you can add the fungicide that would do the trick. My concern would be why was the wood wet painting may trap moisture from a leak in the wood making the problem bigger later on.
Sounds like you’re the “seller” and the “buyer’s” inspector found the problem.
In real estate sales, I think it is better for the seller to reduce the asking price and let the buyer “fix” the problem. If you try to fix the problem, I can guarantee you that it won’t be good enough and you’ll be re-negotiating the cost and repair later.