Rainscreen detail with brick mould window
I’m getting ready to reinstall the windows on my exterior foam retrofit project. I installed two 1″ layers of PolyIso foam. I plan to side the house with Hardi Lap siding. I had planned on using a rainscreen between the PolyIso (foil surface is my WRB, all seams taped for each layer). I’m hung up on how to install the windows. They are brick mould Marvin casement windows that were on the house prior. I am installing new PVC brick mould and PVC stool to the windows before re-installation. How do I incorporate the rainscreen into the window installation? I’m afraid that I may cover up much of the brick mould if I install the windows to the PolyIso with the rainscreen and Hardie. I had planned on using 1x4s for the furring strips, maybe I should run a thinner material but then will I have enough material to “bite” into for the Hardie? My house is 2×6 construction but there is horizontal boards notched into the 2x6s which would allow me to run furring strips ever 1′ if I wanted. So, back to my main concern… Do I fur out the windows and cover the furring strips with the flexible rubber window flashing thus moving the WRB at the windows to the outside of the furring strips? Or do I install the windows to the WRB and fur out only the siding (brick mould is 1.25″ thick, so I’d have about .125″ after the Hardie which is close to the look that I had with the previous Cedar siding).
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