Spacing for the siding should be laid out beforehand. The number of board spaces between the soffit and bottom of the lowest piece of siding at the foundation should be such that the overlap is as per the table below. The wider the siding, the greater the overlap can be.
Start with the bottom course using a furring strip to support the lower edge. Each succeeding course overlaps the upper edge of the previous one by 1 in. (25mm). Rabbeted patterns are self-spacing, but leave 1/8 in. ( 3mm) expansion clearance. Where possible, the bottom of the board that is placed across the top of the windows should coincide with the window cap.
Bevel siding should be face nailed to studs with 1-1/4 in. (32mm) penetration into solid wood using one ring shank nail per bearing spaced at a maximum of 24 in. (610mm) on center. Place nail just above the overlap. Take care not to nail through the overlap of two pieces (see table below).
Do not reduce the siding overlap recommendations given in the installation sections of this purblication. To do so could result in damage from wind-driven water.
Butt joints between boards should be staggered and made on studs. Fit siding snugly to other pieces and to trim.
Recommended Overlap for Bevel Siding
| Imperial |
Metric |
Overlap |
| Nominal |
Actual |
Nominal |
Actual |
Inches |
Mm |
| 4 |
3.5 |
102 |
89 |
1 |
25 |
| 6 |
5.5 |
152 |
140 |
1 |
25 |
| 8 |
7.5 |
203 |
191 |
1-1 1/8 |
25-29 |
| 10 |
9.5 |
254 |
241 |
1- 1.5 |
25-38 |
| 12 |
11.5 |
305 |
292 |
1-2 |
25-51 |
Notes: Do not exceed 2 in. (51mm) overlap. Use the larger overlaps for unseasoned sidings to allow for shrinkage and expansion. Take care not to overdrive fasteners when using larger overlaps. |
