Maine built pre-1800 post & beam no insulation
you go that right. ZERO insulation. Walls are plaster/lath and plaster/ split boards. Lath work came in around 1800? so the older part (built before 1750) has no lath– just very wide boards split to accept plaster.
So what to do about insulating ? There’s no ridge so no vents there, and no soffit, no air coming through any place unless you open windows. In the attic there is a knee wall with two 10″x20″ windows. they can be removed if you want air — Exterior clapboards are over 200 years old, and dense as they are “old growth”. and in good condition, so no need to replace them. Also there are no ridge vents ( no vents at all, unless you open windows!) what? oh where to start, what to do!!)
Currently the house “breathes” because there is nothing to stop air flow.
Oh, and we are less than one mile from the Atlantic Ocean, get all the fog and have a high water table — we can’t do much about the water issues, and the house for the most part sits on granite walls and has a crawl space So humidity is generally 40% or higher…. I never have dry skin even in January!
So, Roxul? between floors is a possibility, since the house needs a fire wall and sound proofing, but what to do about the walls?
suggestions? from you who live in houses pre-1800 would be especially nice…
GBA Detail Library
A collection of one thousand construction details organized by climate and house part