Common Timber Types for Sash Windows

Accoya.

ACCOYA

 

80 years research resulted in Accoya, a high performance wood that exceed those of the best tropical hardwoods. Using nontoxic processes cheap, fast growing pine is structurally altered to produce a stable, very durable product.

  • The manufactures guarantee against rot in its natural unpainted state for thirty years and they confidently claim at least a 60 year life cycle in painted windows.
  • Expensive initial outlay is easily recouped over time with less maintenance costs.

 

Not currently available in all areas.

Accoya.

DOUGLAS FIR (OREGON PINE)

 

 

A time proven durable softwood that is still popular today, however Douglas-Fir is a premium grade softwood which is reflected in the price. Grown around the world including USA, Canada, New Zealand.

  • Douglas fir is a good insulator for sound, heat and electricity. It also possesses natural fire retardancy.
  • Somewhat brittle and susceptible to splitting
  • Highly resistant to mechanical & chemical abrasion

 

 

Accoya.

EUROPEAN REDWOOD (DEAL, SCOTS PINE, BALTIC PINE)

 

Is the most commonly encountered timber used for the construction of sash windows; due to its popularity since the late seventeenth century. The name Deal includes several varieties of pine, fir and spruce imported from Northern Europe.

The European Redwood avaliable today is rapid grown in sustainable plantations and not of the same quality as old growth timbers.

  • Moderately resistant to decay, but paint work must be maintained in good condition.
  • Knots are common
  • Budget, paint grade softwood.
  • Light weight

 

Accoya.

DARK RED MERANTI

 

Meranti is variable in colour and density as there are many sub-species of tree. It is a popular, affordable hardwood for manufacturing windows & doors. SE Asia

  • In general, Meranti is naturally resistant to decay and insect attack.
  • Does not easily take preservative.
  • Affordable, value for money hardwood.

 

Accoya.

MAHOGANY

 

Occasionaly used for the construction of sash windows.

  • Very stable timber.
  • Expensive
Accoya.

SAPELE

 

A common alternative to more expensive Mahogany. West Africa.

  • Tendency to warp
  • Sapele makes a good durable sill (cill)
  • Heavy wood that can add considerable weight when used for large sashes.

 

 

It can be difficult to obtain quality timber stocks (we only use certified sustainable sourced timbers )

Accoya.

OAK

 

Needs no introduction. European or American.

  • Waxed Oak offers a beautiful finish that's been popular for centuries in home & furniture construction.
  • A very durable hardwood.
  • Expensive
  • Heavy wood that can add considerable weight when used for large sashes.

 

Accoya.

JARRAH

 

A common timber in Australia

  • Very durable
  • Tendency to split
  • Jarrah makes a good durable sill (cill)
  • Heavy wood that can add considerable weight when used for large sashes.


 

 

 

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