Technical Specifications
FINISHING
Proper finishing of plywood siding protects it from weathering, reduces
maintenance, and improves the appearance and performance of the
siding project. To begin the finishing process, the wood surface must
be clean and dry prior to any finish application.
An all acrylic-latex paint system will do the best job of sealing the wood
from moisture and ultraviolet exposure from the sun. The acrylic-latex
paint performs best if it first has a primer applied of the same manufac-
turer as the paint. Solid-color stain, limited to either latex or oil-based,
can give good protection, but normally has to be reapplied more
often than the acrylic paint. Semi-transparent or opaque stains can
be used on Breckenridge but are not recommended on Douglas Fir or
DuraTemp siding. For best results, apply a prime coat followed by two
finish coats. Latex semi-transparent stains or oil-based house paints are
not recommended. In addition, spray application is not recommended.
Finishing should be applied by brush or roller rather than spray applica-
tion.
Above all, read and follow the paint manufacturer’s instructions for fin-
ishing the siding project.
STORAGE/INSTALLATION
Roseburg Siding should be stored indoors, particularly if it will not
be used immediately. If it is necessary to store the siding outdoors,
the units should be stored off of the ground and covered loosely with
protective material. The structure to which the siding is being applied
should be well vented and dry prior to siding application. New con-
struction should be left open to allow for venting of excess construction
moisture.
Siding panels can be installed vertically, directly over wall framing (studs
or 2x6’s), provided the on-center stud spacing does not exceed the
span rating given on the panel back stamp. All panel ends and edges
should occur over framing. Roseburg recommends a 1/16” minimum
gap between panel edges and 1/8” gap between panel ends. Panel
spacing is important to allow for any possible panel expansion caused
by moisture absorption. Horizontal joints in multi-story buildings should
allow for framing shrinkage.
Nail the siding 6” on-center along panel ends and edges and 12” on-
center on intermediate supports (shear walls require additional nailing).
Use only corrosion resistant nails. Use 6D box, casing, or siding nails
for panels 1/2” thickness or less (a minimum of 5/8” from the panel
edge), and 8D for greater thickness (minimum of 3/8” from the panel
edge). When applied over wood or plywood sheathing, the nails must
penetrate 1” into the studs, except that when Gypsum sheathing is used
the nails should penetrate the framing 1-1/2” minimum. The nailing
sequence can also be a factor in maintaining a uniformly flat appear-
ance to the finished wall. Position the siding panel, maintaining the
recommended edge spacing, and lightly tack at each corner. Install
the first row of nails next to the preceding panel from top to bottom.
Remove the tacking nails. Then nail the row at the first intermediate
stud. Continue by nailing at the second intermediate stud, and finally
at the edge opposite the preceding panel. Complete the installation by
fastening to the top and bottom plates. The nail heads should be snug
or flush with the panel surface.
Allow at least 6” between the bottom edge of the siding and the finished
grade or horizontal surfaces. Building paper is not required for vertical
installation, unless specified by local building code. Apply a vapor bar-
rier to the warm side of the wall.
For the best performance, Roseburg recommends a solid-color acrylic-
latex finish be applied to the siding within 30 days of installation.
MAINTENANCE
Proper maintenance of Roseburg Real Wood Siding is very important to
preserving its life and look. Prolonged exposure to the sun and weather
will cause any finish to show its age. Once the finish fails to provide
adequate protection, siding can become brittle, cracked and eroded,
causing it to lose its adhesion, fade or mildew. Therefore, it is impor-
tant to maintain a quality finish and, if needed, reapply a protective
coating when bare wood is exposed, or peeling and flaking is detected.
Before refinishing, remove all dirt, mildew, chalk and loose finish from
the surface. A minimum of two mils dry coat thickness is recommended
when using solid finishes. Primers may be required for bare wood or
when a color change is made.
P.O. Box 1088, Roseburg, Oregon 97470
Tel.800-245-1115•Fax(541)679-2543
www.Roseburg.com
A P A
The Engineered Wood Association
CERTIFIED SIDING
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Large cover image is the Robert Biale Winery designed by Zepponi Architects located in San Francisco, CA