Description
Treatment Specifications
Softwood timbers treated with Resistol® 6220 are targeted to meet the requirements of Use Classes 1 and 2. These two Use Classes are defined in EN335:2013 as follows:
- Use Class 1 – internal building timbers – no risk of wetting.
- Use Class 2 – internal building timbers – risk of occasional wetting.
Typical Applications
- Internal Building Timbers
Structural elements and general timbers in domestic, commercial and public buildings, such as wall frames, beams, joists, subfloors and roof timbers.
When used in construction applications it is always best practice for preservative treated timbers to be dried down to the in-service moisture content prior to fabrication.
- Plywoods
Plywood grades are based on EN 636 (Dry, Humid and Exterior classifications), which themselves are based on bonding classes 1, 2 and 3 from EN 314 Part 2. Plywood to EN 636 Exterior Grade (EN 314 Part 2 bonding class 3) should be specified. Humid Grade (bonding class 2) might be acceptable, but the board manufacturer or supplier should be asked to confirm that Humid Grade board can be put through Resistol® 6220 treatment process.
