Also see:
3.37.2.23 Fascias and trim
Fascias, bargeboards and soffits shall be appropriately fixed and treated against decay.
Table 23: Materials acceptable for facia boards
| Material | Standard | Minimum material specification | Additional information |
|---|---|---|---|
| Marine grade plywood | BS 1088 | Standard grade | Coated |
| Exterior grade plywood | BS EN 636 | Bond class 3 | Preservative treated and coated |
| Natural solid timber boards | N/A | Timber should be preservative treated or naturally durable | See Table 1 in Chapter 3.3 |
| High density fibre reinforced calcium silicate board | BS EN 12467 | Category A | |
| Glass fibre reinforced cement (GRC) board | BS EN 12467 | Category A | |
| Proprietary products | Technical Requirement R3 |
When installing fascia boards and soffits:
- timber for external feature work should be free from waney edges, large knots, resinous pockets, splits and other unsightly defects
- where preservative treated timber is cut, preservative should be applied to the cut end
- where timber is to be painted, it should be knotted and primed on all surfaces before fixing
- where timber requires a stained finish, one coat of stain should be applied before fixing
- each joint should be cut and fixed neatly.
Fascia boards should be fixed:
- twice to each rafter
- with splayed butt joints.
Last updated: 2nd January 2024