The new technology that is attempting to improve the rainscreen drainage detail is the use of mat materials.
Drainage mat vs furring strip for rainscreen.
A rainscreen system must be detailed to drain at terminations.
Easily trimmed utility knife.
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.
Why use a manufactured drainage mat.
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.
Install a started strip for siding and then finish siding the wall as you normally would.
Cut the furring short to make room for a mesh mat like ridge vent along the bottom and top of the wall and windows.
I can provide a picture of what i am referring to if helpful pending this doesn t sound like an obviously dumb idea.
Most of these mats come in the form of roll stock.
That way any rain that sneaks back there can drain out.
Eifs and corrugated lath strip video.
Tyvek drainvent rainscreen is a three dimensional honeycomb textured drainage mat that provides advanced protection against moisture damage in exterior wall systems.
Fold the screen up and install a water table trim board just above the flashing.
Mti s 1 8 corrugated lath strip white used as an eifs drainage strip protects the drainage gap in water managed eifs.
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.
