The patch is to plug/cover a through-hole originally cut to accomodate a stove top vent. The contractor put the wrong wall cap cover, in the wrong place! I mounted the correct one in the correct place, but that left a 12 inch by 12 inch hole through an exterior wall which needs patching - PROPERLY.
The google search only turned up cracks and large area repairs but no through hole repairs.
What is the proper way to fix this hole?
The wallconsists of
2x6 studs filled with fibreglass fluff 1/2 inch sheathing two layers of tar paper 1/2 inch styrofoam chicken wire and three coats of stuccoTotal thicknes from sheath out is 'supposed' to be around 1 inch but is skimpy at 7/8
Luckily I had access to the inside of that hole and used KwikSeal to stick a square 1/4 plywood like board over the inside and screwed to the surrounding sheathing. Thus the hole is bug sealed. and almost water sealed.
My concerns: monsoon rains hit this wall - I need it sealed well. The sun hits this wall - AZ sun is a bit brutal.
Then I need to find out how to properly seal around the new vent cover, too. It's well made. With flashing that extends out. As temporary, I simply used Kwik seal around the mating surface and screwed it to the sheathing.
For what it's worth, when I cut the new [and slightly larger vent hole] I did it very cautiously and saved the square piece, almost intact. That includes the 1/2 inch sheathing material. Should I cut any of these pieces down and use them, or should I absolutely use only new materials to patch the old hole.
Also, how does one match the texture? Stucco on the surface looks like tiny rocks are embedded in the mortar. Is this something standard, or a skill that requires expertise beyond belief?
Oh, yeah, these holes are just above head height, so the patch should look decent.