Insulating and sealing an old house
I am renovating a 1920's summer cottage. It is in poor condition, but needs (deserves) to be preserved and updated. The structure has survived because it can dry both ways, interior/exterior. Wall system is to be upgraded and insulated. Attached is a proposed typical wall section and a interior photo The 1/2" Zip is being placed over the 3/4" board sheathing for bracing/racking (no bracing exists). Interior finish will vary: 3/4"pine beaded board and 5/8" drywall. Air sealing is at the Zip layer
-Can the XPS be applied directly to the existing sheathing and then 1/2" Zip? (eliminating the OSB) Would this provided the needed racking resistance?
-Is this a safe system, condensation/dew point ?
Presently the place is being lifted for a new foundation....more later?
A side note: this cottage was built by John Boothman Sr. His work is featured in a new book: The Hand of the Small-Town Builder: Summer Houses in Northern New England, 1876-1930, by Tad Pfeffer. A good read and worth a look, Google it.
Posted Jun 11, 2014 12:20 PM ET
Edited Jun 11, 2014 1:25 PM ET
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