Shim material for rainscreen vent sv-3
In order to save some money on my project, I went with the sv-3 (7/16” thickness) instead of the sv-5 (3/4”) rainscreen vent by cor-a-vent even though I am using 3/4” plywood for my furring strips. The sv-3 is about $3.50 ea. While the sv-5 is about $8 ea.
That would really add up in cost so I thought I could still use the sv-3 and shim it out 5/16” to match the 3/4” plywood. Plus, I already have the sv-3 and probably can’t return it which is another reason I’m forced to get creative. Originally I was going to just use 1/2” plywood furring, but James hardie requires 3/4” furring and so that is what I am going to use for my project. That’s sort of how all of this came about…
my question is, what material would be a good option as a shim. And keep in mind the shim needs to be continuous or the bugscreen won’t have any effect.
What I thought might be good to use was strips of 5/16” hardiepanel that I can easily rip with my shears. I don’t see a problem with that but wanted to double check before using it.
also I will be pretty close to grade around the whole house – ranging from 3”-5” above grade.
buying a sheet of 5/16” plastic, or Azek would defeat the purpose in this, although it would be an ideal shim, I might as well just buy the sv-5.
am I ok to use the hardie for my shim? Or is there another option?
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