Installation Guide

SIZE

Nails must be long enough to go through the underlying materials, such as sheathing and insulation,

and penetrate into at least 1-1/4” of solid wood.

COUNTERSUNK

In some situations, you may choose to intentionally countersink nails. If so, follow the same

procedure to fill the cavity as with overdriven nails.

NAIL WITH CARE

Nails should be driven with care. Heav

y nailing distorts the wood and may cause splitting. Like all

wood products, Primed Trim Boards should be hand nailed. The use of pneumatic fasteners is

discouraged; but, if used, they must employ stainless steel or galvanized nails and a flush nailing

device to ensure that nails are driven snug with the surface. Overdriven nails that are not filled with

exterior putty will do not conform to our specifications.

OVERDRIVEN

Overdriven nails must be remedied immediately. Given the situation, fill overdriven nail holes with

an interior or exterior grade wood sealant depending on application. Sealant must be designed for

filling nail holes. Allow sealant to dry, sand smooth with 100 grit sandpaper and spot prime before

painting. Over time, spackling sealant/putty may need to be replaced or touched up.

H. FASTENING REQUIREMENTS

For fascia app

lication, Primed Trim Boards must be double nailed and fastened at a maximum of 24”

on center. For all other applications, fasten trim 24” apart using a staggered nail pattern or double

nail 16” on center. Double nail joints and do not nail any closer than 2” from the edge of material

without drilling pilot holes.

Stagger nails on either side of trim. For 10” & 12” triple, nail joints and double nail stagger patterns.

Note: Nails must penetrate 1-1/4” into the solid wood framing.

I. BUTT JOINTS

Joints over framing. All joints where two pieces meet end to end must occur over framing. Butt joints

are recommended for both horizontal and vertical trim. In runs of 16’ or less, the ends should lightly

touch. Runs over 16 feet require a gap of 1/8 inch, which should be sealed with exterior caulk. Attach

to the framing members with two nails on each side of the joint. Drill pilot holes first to avoid

splitting.

J. CORNER BOARDS

Create tight joints. Always ensure that fasteners penetrate solid framing members. To create a tight

joint between the two corner boards, increase the nailing frequency along the outer side of the corner

boards. Nail into strapping every 24” and pre-drill and fasten along the edge every 16” by pre-drilling

holes and inserting stainless steel wood screws. Stainless steel trim-head screws will reduce the

possibility of splitting and joint failure. Joints should be glued according to glue manufacturer’s

instructions for primed boards. Use high- quality, exterior polyurethane adhesives specifically

designed for wood and wood substrates. Caulk wherever siding or other material is in contact with the

corner boards.