The 1 8 gap it maintains limits loss of r value to less than 5.
Drainage mat vs furring strip for rainscreen.
Tyvek drainvent rainscreen is a three dimensional honeycomb textured drainage mat that provides advanced protection against moisture damage in exterior wall systems.
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Fold the screen up and install a water table trim board just above the flashing.
The horizontal furring strips are the problem if you don t provide for 1 sufficient drainage for the rainscreen this will be blocked by the horizontal strips and 2 sufficient vertical airflow behind the siding this also will be blocked by the horizontal furring strips geary writes.
Mti s 1 8 corrugated lath strip white used as an eifs drainage strip protects the drainage gap in water managed eifs.
A rainscreen system must be detailed to drain at terminations.
I can provide a picture of what i am referring to if helpful pending this doesn t sound like an obviously dumb idea.
In situations where exterior rigid foam insulation is being installed cor a vent recommends using thick treated wood furring strips installed over the foam screwed into the wall studs to provide a structural fastening point for the siding and the sv 5 siding vent installed at the top and bottom to supply the rainscreen drainage.
Most of these mats come in the form of roll stock.
Eifs and corrugated lath strip video.
That way any rain that sneaks back there can drain out.
Use additional vertical furring strips and or a corrugated plastic furring strip on the corner trim to provide a ventilation channel to the cavities in the rainscreen created by the horizontal furring strips.
Why use a manufactured drainage mat.
Ideal for stucco and stone exteriors tyvek drainvent rainscreen is suitable for use with a variety of other materials including brick wood siding fiber cement siding.
Install a started strip for siding and then finish siding the wall as you normally would.
