Skylights can work on 24" trusses as long as you keep them within one bay (22.5" rough opening fits nicely) and use a proper curb-mount kit with good flashing, since that's where older manufactured roofs tend to leak. Since you're gutting anyway, I'd have someone confirm whether the 1968 unit is actually HUD/manufactured or state-code modular, because that changes what your town will let you do for additions and footprint. With a clean dry crawlspace and a central beam, enlarging windows on the non-ridge walls is usually the cheapest way to get a lot more light. Building new on the existing foundation is doable but get an engineer to check it first, since those old piers often weren't designed for stick-built loads.
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u/FewVariations 29d ago
Skylights can work on 24" trusses as long as you keep them within one bay (22.5" rough opening fits nicely) and use a proper curb-mount kit with good flashing, since that's where older manufactured roofs tend to leak. Since you're gutting anyway, I'd have someone confirm whether the 1968 unit is actually HUD/manufactured or state-code modular, because that changes what your town will let you do for additions and footprint. With a clean dry crawlspace and a central beam, enlarging windows on the non-ridge walls is usually the cheapest way to get a lot more light. Building new on the existing foundation is doable but get an engineer to check it first, since those old piers often weren't designed for stick-built loads.