Ford has been saying Sheathing is the living embodiment of The Grim Reaper.
GRAVE SITUATION Sheathing with Victor and Jack in The Clansman
Lastly, the effects of sheathing thickness and fastener spacing on seismic fragility of steel-sheathed CFSF buildings were discussed.
These walls were 1.22 m in width and 2.44 m in height (with 2 : 1 aspect ratio) and were sheathed with steel sheathing at one side.
Wood such as sheathing typically increases in moisture content during the winter in cold climates as water vapor naturally migrates from the warm indoors to the cold outdoors and condenses on the cold sheathing.
(9) So for decay to occur such as has been observed in structural sheathing in walls with vinyl siding, the wood must be both wet and warm.
Moisture content results from the sheathings in OSB wall 1, plywood wall 2, and asphalt-coated fiberboard wall 3 are shown in Figures 9, 10, and 11.
Moisture Uptake in the Wall Sheathings. As was stated earlier, the bottom of the wall was the location where the sheathing experienced the most significant degree of wetting.
As builders tighten up their houses to face new energy codes, many are turning to rigid plastic exterior sheathing
to beef up R-values.
Well, if I have a vapor impermeable sheathing
such as extruded polystyrene (XPS), the inwardly driven moisture condenses on its exterior surface and drains downward to a flashing where it is expelled from the wall (Figure 4).
And everything seems to work better with a vented air space between the sheathing
and its water control layer and the cladding.
Residentially, we now use tapes on wood sheathings
(Photo 8) and foam sheathings
(Photo 9) to provide water management and air management.
The foam sheathings
do not absorb or store any water.
Similarly, the same goes for sheathings
. Plywood and OSB sheathings
increase in moisture content during heating periods as cavity insulation levels rise.
It also lead to the introduction of layers of horizontally installed boards--thicker than the clapboards (called sheathing
) all for the purpose of supporting the clapboards.