Installation Guide

installation
cedar discovery
Mansard Roof Installation
Instructions
Cedar Discovery
®
can only be
installed on mansard roofs with a
slope of 45/12 or greater (15º angle
or less). It must be attached with
standard siding nails into a solid
wood substrate.
The sheathing must be covered with
either:
• Onelayer30lb.roofingfelt
with a 6" minimum horizontal
and vertical laps.
• Twolayers15lb.roofingfelt
(Fig. 1).
A field formed flashing must
be installed at the bottom of the
mansard. This can also be the cap for
the soffit. The flashing should go up
the roof a minimum of at least 4".
(Fig. 2).
The Cedar Discovery starter strip
should be installed onto the flashing.
Follow the standard installation
guidelines. (Fig. 3).
Install any 3/4" corner post system at
all transitions. The bottom of these
corner posts should be closed off by
bending flaps as shown (Fig. 4).
Install all Cedar Discovery courses
cutting the last course as required.
Slot nail holes and nail into top
of mansard following standard
installation guidelines for last panel
installation (Fig. 5).
Form a cap from trim sheet that will
cover the top of the mansard and
come down to cover the nails that
are holding the last course of Cedar
Discovery. It is recommended that
this flashing be installed under the
top roofing or behind the sidewall
system (Fig. 6).
30 lb.
6" Minimum
Felt Overlap
Less than 15ϒ
(Greater than
45/12 Slope)
Fig. 1
4”
Minimum
Flashing
Fig. 2
4"
Flashing
2-1/2"
Starter Strip
Fig. 3
Close Corner
Post Bottoms
Miter
1"
Fig. 4
Follow Standard Installation
Guidelines to Cut, Slot and
Nail Last Course
Fig. 5
Use Trim Sheet to Form Cap.
Install to Cover Nails Holding
Last Course of Cedar Discovery
®
Fig. 6
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