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1) Machining
CNC (computerised numerical control) machines are used to execute the entire wood machining process. Sawing, milling and drilling are performed using programmed tool motions.
CNC machining ensures every cut is exactly where it supposed to be. It also allows for much greater speed and precision with a the tolerance of 0.001 or less.
2) Pre-treatment
All timber window elements are carefully pre-treated against wood-destroying fungi and surface mould before assembly using advanced flow pre-treatment technology. This technology ensures the timber is coated on all sides, increasing its resistance to moisture that can cause early degradation.
3) Assembly
Sash window frames and sashes are assembled using a hydraulic press which enables precise corner squaring. Frames are connected together using wooden dowels and non-toxic, water based, pH neutral class C4/D4 adhesive. A ‘dowels’ (pieces of pre-made shaped timber) and adhesive completes the joint. The dowels increases the surface area for adhesive and creates an intersecting part to the joint.
The adhesive dries quickly and forms a permanent band. After drying, the adhesive maintains flexibility rather than becoming brittle with age.
4) Finishing
Wooden sash and casement windows are supplied as fully factory finished with primer, base coat, stain/primer and top coat of microporous paint as standard.
All window units are painted and stained to the client’s specification using our state-of-the-art automated painting line.
5) Glazing
Two methods of glazing are used:
Wet glazing
This method uses neutral cure silicone, a high modulus sealant seal for double and triple glazed traditional sash and casement windows. This glazing method ensures durability, flexibility and safeguards against all types of weather, ensuring minimal air and water come into contact with wooden window frames.
Traditional
This method uses heritage putty for either single or “slim sidelight” double glazed units. Glazing putty is a type of sealant applied around the edges of a window to fill any gaps or holes between the frame and the glass. Glazing putty is made from a mixture of linseed oil, whiting and other ingredients which harden over time to form a durable seal. A main benefit of glazing putty is it ensures a window is properly sealed and protected. This helps prevent drafts and leaks which can reduce energy efficiency and increase the cost of heating and cooling. Additionally, glazing putty helps protect the window from moisture and other environmental factors that can cause damage over time.
6) Packing & delivery
After passing through quality control, the windows are packaged with a wooden board attached to all sides to ensure delivery in pristine condition. We also use a soft white board or blue sponge to protect handles and/or corners.
All packages are clearly labelled so you know what’s for what and for who upon delivery. If some items are very heavy, components are separated for safe and easy handling.
Deliveries are made with artic or trailer lorries either directly to site or a depo for further deliveries. We normally fit 90-120 wooden sash windows per full load.
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