Greetings again, folks.
Working on my own home.
Built in 1903. Lap siding. At some time in the past someone apparently removed it all, and the shiplap, and put in insulation.
It needs repainted, and there’s enough paint on it that it probably needs to have the old stripped.
Thinking through this, I’m wondering if it would be better to put continuous insulation on the outside of the existing siding, mount 1-by spacers on top of that, and put on new siding. I think it would be less time, end of day, but certainly not less money.
Can anyone recommend a building science resource that would help me understand the issues of how this would be done? Vapor drive and WRB issues, materials, etc?
Thanks for any help you can give me.
Replies
Flseminarian -
There's going to be a lot to unpack on how you would go about adding a continuous insulation layer as a retrofit. For example, how will the additional depth affect your windows, doors, soffits (eaves and gables), and penetrations (hose bibs, junction boxes, vents, etc.)?
Provided you can come up with a plan for all of that - you'll want to then determine what you currently have in place for a WRB and/or vapor barrier(s) (these may not be the same thing or even exist on a 1903 home depending on what retrofits have been made). Then you can investigate where your condensing surface(s) may be and what and how to go about assembling your wall.
Again, not really an answer - but there's a lot to unpack here.
This should give you a good start on ideas: https://www.greenbuildingadvisor.com/?s=wall+assembly
Thanks for the response.
Yes, I have thought about most of those, but probably not all, and I'm sure there's more than that.
I don't know if there is any barrier anywhere, other than paint film. I don't know what insulation was put in the stud cavities, and whether it had kraft paper on it.