Attic Trusses
Attic Trusses Q & A
Self-Build - e.g.
Roof Truss Q & A
Timber Treatment
Commercial - e.g.

Eco-joist

Clonoe Timber operates the single largest Double Vacuum Timber Treatment plant in Ireland. The computerised control system ensures optimal treatment to Hazard Classes 1, 2 & .We use the new generation of water based, environmentally safer chemicals.

Double Vacuum, Pressure Treatment protects timber from Woodworm, Wet & Dry Rot & Insect attack...

Timber treatment is a very cost effective, Timber insurance.

The 3 chemical products most widely used in Double Vacuum Pressure Treatment in the UK and Ireland, are Protim's Osmose E-415, Arch's (Hicksons) Vac-Sol Aqua and the German Wolsit KD 20.

What do the various Hazard Classes (HC) mean?

The term "Hazard Class" refers to the risk to the timber, The new generation of water based, environmentally safer chemicals are very safe to humans and all mammals.

Hazard Class 1:

This HC generally covers timbers that will not be exposed to the risk of wetting. This will include a great deal of internal joinery and dry roof timbers. The main hazard to timbers in this class is insect attack, as fungi cannot grow in the absence of wetting.

Examples

Internal Joinery Load bearing joinery & partition walls

Stair cases, skirting boards / architraves etc

Roof Timbers (Dry) Roof Trusses,

Internal floor & roof deck units above DPC

Hazard Class 2:

This HC covers those timbers that are generally not exposed to wetting but where there is a genuine risk of intermittent wetting. The hazards here include both insect and fungal attack. Protection from direct weathering must be present.

Roof Timbers (risk of wetting) Tiling battens, rafters, purlins

Flat roofs, flooring, wall-plates.

External walls/ground floor joists Timber-frame external walls

Wall Cladding, Garages, sheds etc

Hazard Class 3:

This (HC) class covers those timbers that are above the Damp-Proof Course (and out of ground contact) but are exposed to frequent wetting. Here, the main hazard to the timber is the continual wetting and drying and exposure to UV rays and temperature change. All of these can act to break down the efficacy of the preservative used and many preservatives require a higher retention (of active ingredients) to protect against fungal and insect attack that can occur in this HC. Exposure to direct weathering is the Key here.

Leisure wood (frequent wetting) Decking, Pergolas, Garden furniture

Fencing rails D rails, Bev' rails, Panels,

Children's playground furniture ( Non ground contact)