Sash windows. Timber Products. Sashwise

Timber products

We offer a range of timber products including hardwood and softwood

Historically all of our new joinery, sashes and sash boxes were made entirely out of hardwood, typically Sapelle.

Sapelle is a sustainable hardwood that is very durable, has a very tight grain so takes a good paint finish and is lightweight, which makes it ideal for windows. We still offer a Sapelle as an option but we are increasingly using the timber Accoya as it is a far superior wood.

Accoya is the brand name of a treated wood created via a non-toxic treatment and uses fast-growing softwood timber from sustainable sources. Which creates a high performance wood, ideal for outdoor use.

The treated wood has very high durability and dimensional stability allowing for reduced maintenance and gives environmental advantages over slow-growing hardwoods, woods treated with toxic chemicals, and non-renewable carbon-intensive materials such as plastics.

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KEY FEATURES

  1. Dimensionally Stable
  • Swelling and shrinkage reduced by 75% or more
  • Windows open effortlessly year round
  • Reduced maintenance costs
  1. Outstanding Durability
  • Lasting 50 years above ground, 25 years in ground/freshwater
  • Virtually rot proof
  1. Perfect for Coating
  • Improved stability means coatings last up to two times longer

Our Other Services

Full Restoration

We will completely and sympathetically restore the windows, so they will look like new without losing any original features.

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New Hardwood Double Glazing

Here at SashWise we can make new double glazed hardwood timber sash windows to fit within your original box sash frame.

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New Hardwood Sash Boxes

We can supply and fit new hardwood sash boxes complete with double glazed sash windows that replicate the originals.

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