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Treated Timber

Preservative treated timbers are also kept in stock for prompt despatch including lengths up to 8.4m long! Most of the treated stock is normally GREEN in colour but BROWN pigment is also available to order. Other treatments such as FIRE TREATED, creosoted and special coatings are also offered as special processes.

European Whitewood

Sawn Finish

Product Size (mm) Finished Size Grade Stock Length Up to (m) Heat Treatment Environmental Scheme
22 x 100mm plus or minus 1-2mm Ungraded 3.0m > 4.8m None FSC
22 x 150mm plus or minus 1-2mm Ungraded 3.0m > 4.8m None FSC
25 x 150mm plus or minus 1-2mm VIths 4.2m KD or 56/30 FSC
38 x 150mm plus or minus 1-2mm VIths Random Kiln Dried FSC
38 x 225mm plus or minus 1-2mm Graded 1.35m WET PEFC
75 x 75mm plus or minus 1-2mm C16/C24 2.4m > 8.4m WET PEFC
75 x 150mm plus or minus 1-2mm C16/C24 2.4m > 8.4m Kiln Dried PEFC
75 x 200mm plus or minus 1-2mm C16/C24 2.4m > 8.4m Kiln Dried PEFC
75 x 225mm plus or minus 1-2mm C16/C24 2.4m > 8.4m Kiln Dried PEFC
100 x 100mm plus or minus 1-2mm C16/C24 2.4m > 8.4m WET PEFC
150 x 150mm plus or minus 1-2mm C16/C24 2.4m > 8.4m WET PEFC

European Whitewood

Planer Regularised

Product Size (mm) Finished Size Grade Stock Length Up to (m) Heat Treatment Environmental Scheme
47 x 50mm plus or minus 1-2mm Ungraded 3.0m > 4.8m Kiln Dried PEFC
47 x 75mm plus or minus 1-2mm Ungraded 3.0m > 4.8m Kiln Dried PEFC
47 x 100mm plus or minus 1-2mm C16/C24 2.4m > 6.0m Kiln Dried PEFC
47 x 150mm plus or minus 1-2mm C16/C24 2.4m > 8.4m Kiln Dried PEFC
47 x 175mm plus or minus 1-2mm C16/C24 2.4m > 7.2m Kiln Dried PEFC
47 x 200mm plus or minus 1-2mm C16/C24 2.4m > 8.4m Kiln Dried PEFC
47 x 225mm plus or minus 1-2mm C16/C24 2.4m > 8.4m Kiln Dried PEFC

European Whitewood

Properties
Botanical Name Picea abies
Moisture Content 18-20% (when treatment is dry)
Durability Non durable species preservative treated
Typical Uses Roof joists
Density 470 - 550 kg/m3
Region of Origin Scandinavia / Scotland / Germany
Heat Treatments Kiln Dried or 56 degrees for 30 minutes certified

Brief guide to timber preservation

Key Points

  • Treatments provide resistance to rot & “woodworm”
  • Although treatments are applied under pressure the chemicals only penetrate around the outside of the timber forming a “skin”
  • Timber species take up preservatives at different rates
  • Preservative penetration & solution levels depend on the end use of the timber
  • Desired service life reflects the penetration level for example roof battens requires little or no penetration to achieve 60-year service life. Fence posts however require a minimum 6mm penetration to achieve 15-year service life.
  • Some species are resistant to pressure treatment e.g.spruce & douglas fir which limits the penetration levels unless additional processes are applied such “incising” etc.
  • Even when service life is specified not ALL pieces within a batch will meet life expectancy a few will decay earlier but the treatment process is still deemed sound.
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For additional technical information

Use Glass Guide

Use Class Typical service situation
1 Internal, with no risk of wetting
2 Above ground with occasional wetting
3C COATED Above ground exposed to frequent wetting
3U UNCOATED Above ground exposed to frequent wetting
4 Ground contact permanently exposed to wetting
5 Permanently exposed to salt water wetting
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For a guide on how to buy & specify preservative treated wood