Installation Guide
58
TR1510_P6/9 05/15
HardieTrim board is a decorative non-load bearing trim product.
Fascia
Figure 19
roof
sheathing
roof framing
roofing
roof underlayment
drip edge flashing
HardieTrim NT3 board
sub fascia
HardieSoffit Panel
Do not use HardieTrim to replace any structural component
HardieTrim
boards can be fastened directly over a 2x sub-fascia or directly to rather tails. Check local building code for relevant codes.
Option 1
Over sub-fascia:
(figure 19)
When installing HardieTrim boards over solid 2x sub-fascia use minimum 2 in., 16 gauge corrosion resistant finish nails. (see fastener guide below)
Option 2
Direct to rafter tails:
(figure 20)
When installing HardieTrim NT3 boards without the presence of a 2x sub-fascia, a minimum 8d siding corrosion resistant nails must be used to attach HardieTrim NT3
boards DO NOT use finish nails. (refer to fastener guide below).
HardieTrim
Board
6 in.
8 in.
10 in.
Over 2x Sub-fascia
(Minimum 2 in. 16 ga. Finish nails)
FASTENER SPACING
Direct to Rafter
(min 8d siding)
2 nails every rafter spaced max
24 in. O.C.
3 nails every rafter spaced max
24 in. O.C.
2 nails spaced maximum
16 in. O.C.
3 nails spaced maximum
16 in. O.C.
4 nails spaced maximum
16 in. O.C.
Figure 20
Roofing
Roof
Underlayment
Style“D”
dripedge
Flashing
HardieTrim NT3
Board
HardieSoffit
Panel
Roof Framing
Roof
Sheathing
INSTALLATION (cont.)
Gutters:
James Hardie recommends the use of rain gutters whenever possible.
Do not attach gutters directly to HardieTrim
Use gutter hangers that attach through the roof sheathing into a rafter
tail or other structural member.
Soffit
When installing HardieSoffit additional framing/blocking may be
needed depending on application. Refer to HardieSoffit installation
instructions for guidance.
Fascia Fastener Guide