Brimstone Poplar Cladding

Length:

Random lengths: 1.8-3.0 m, allowing small percentage down to 1.5 m. Lengths of over 3.0 m may be included but are not guaranteed.

Orientation:

Horizontal or vertical.

Appearance:

Consistent dark chocolate brown colouring with a silky grain pattern and regular bird's eye pips. The colour can be further enhanced by the application of a clear oil such as Osmo UV-resistant oil. Brimstone poplar weathers quickly and evenly to a pale silver grey colour.

Technical properties:

• Moisture content: 4–6%.

• Natural durability (to BS EN 350-2): Durable, Class 1.

• Insect attack: Thermally modified wood is resistant to insect attack when used above ground contact.

• Service life (to BS 8417): Occasionally wet: 60 years; frequently wet: 30 years.

• Treatability class: Resistant.

• Movement class: Small (negligible).

• Resistance to impact: Low.

• Resistance to fixing: Low, modified wood is brittle and should be treated with care.

• When to fix: No restrictions.

• Grading: BS 1186-3: Class 1; BS EN 942: J20; CE: Grade A.

• Working properties: Thermally modified woods are more brittle than untreated wood. Care should be taken when cutting and nailing to prevent chipping and break-out; pre-drilling is advised.

• Extractives: The modification process involves no chemicals, and any natural chemicals in the wood are removed during the process. Thermally modified wood can be treated as inert.

• Emission of formaldehyde (to BS EN 14915): E1 (not significant).

• Reaction to fire (to BS EN 14915): Euroclass F (untested), D-s2, d0.

• Fire treatment: Untested.

Fixing:

Face fix or secret fix using stainless steel ring shank nails (dependent on profile) or second fix gun stainless steel brad nails.