Mortairvent® 202 / 203
Rainscreen Drainage Mat for Exterior Walls
INSTALLATION INSTRUCTIONS — WOOD, VINYL, OR FIBER CEMENT SIDING
Apply a weather resistant barrier over sidewall sheathing. Note: some regions may require two layers of
weather resistant barrier. Check local codes for more information.
Install Mortairvent
®
after windows and doors have been properly installed and flashed. Starting at the
base of the wall, unroll Mortairvent from right to left with the fabric flap at the bottom, the three-dimen-
®
sional (blue) polymer matrix against the weather resistant barrier, and the fabric side facing the exterior
of building. Staple or nail every three square feet.
On the first (bottom) course only, un-fold the fabric flap and tuck it between the (blue) polymermatrix
and the siding to create an insect screen.
On subsequent courses, butt the blue polymer material together without overlapping. Make sure to pull
the fabric flap over the previous course (shingle style) and staple
On top course, invert the roll and unroll left to right with the fabric flap at the top. Unfold the fabric flap
and tuck it between the (blue) matrix and the weather resistant barrier to create an insect screen.
Install Mortairvent® under trim boards or butt up against the trim board edge using a thicker trim board or
shim to account for thickness of the rainscreen material.
Apply siding over Mortairvent
®
using manufacturer’s recommended fasteners and spacing.
Advanced Building Products, Inc.
800-252-2306
www.mortairvent.com
Butt (blue) polymer matrix together
with fabric flap overlapping
previous course.
Wood, Vinyl, or Fiber Cement Siding
