Home Reno Exposes Dry Rot in Framing and Sheathing - Part 2

Here again, Steve Kemp looks at more of the damage caused by the moisture damage discovered during a full home renovation. The sheathing shows obvious signs of dry rot because it has been going through different cycles of moisture and drying. In the Lower Mainland, the southeast exposure is the most susceptible because in the winter the rain comes at an angle - due
to the winds.
Over time, unfortunately what led to this extent of damage is that the siding was not properly fixed back in day one when it started to shrink and crack and open up. As soon as the building envelope has any sort of cracks, particularly on this southeast exposure, then, the house is liable for moisture to be penetrating and getting deeper into the wall system. Structural membranes - jack studs - that support the window are completely rotted as well.
One of the other issues with a house that's deteriorated this badly is that it’s in the Cascadia Subduction Zone seismic zone and there is very little seismic strength in the rotten wall structure. This will require rebuilding the frame and redo the sheathing and using a system that is more consistent with the seismic fault.
Kemp Construction Management Ltd. in Delta, BC Canada
kempconstruction.ca/
Phone: [phone]
Email: [e-mail]
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