Sash Windows (Vertical sliders)

Below is a list of the additional features, colours and accessories that are available for our Timber Sliding Sash Windows.


Sash Timber Windows

Our Timber Sash Windows are available in the Contemporary, Traditional and Heritage Ranges. All are made from engineered multi-layered softwood or hardwood. This is exquisite certified timber from well managed sources and a full FSC 100% certification. The Contemporary range is perfect for the new build home and features pencil round mouldings and bars, and triple or acoustic glazing as an extra to enhance the performance of your windows (as with the Traditional range). The Traditional range offers the same benefits as the contemporary, whilst also boasting the addition of authentic ovolo and putty bead mouldings and bars. These are fitting for the new build home and replacement project. Finally, the Heritage range offers the choice of single or slimline double glazing and display lambs tongue and putty bead mouldings and bars and decorative horn detail. Their slim frame section render these windows perfect for listed buildings and where conservation approval is required.

Options & Features

Below is a list of the additional colours, features and accessories available for our Timber Sliding Sash Windows.


Range of handles available:
D Handles- used as a pull to slide the top sash downwards
Hook Lift- used to slide bottom sash upwards
Ring Lift- this versatile feature will work to move the bottom sash up or top sash down
(Pulley Wheels-used as a lifting tool on the cords and weights design

More Glazing

14mm Slimline Double Glazing- Delivers a similar presence as single glazing yet boasts an improved thermal performance. Available with Ug values of 1.2 W/m2K and overall Uw values of 1.3 Wm2K
4mm Single Glazing- All Heritage range products can be supplied with these single glazed units. Useful for planning and conservation projects. Available with Ug values of 5.8 W/m2K and overall Uw values of 4.5W/m2K

Locks & Fasteners

Fitch and Brighton Fasteners- locks both sashes together when windows are closed.
Vent Lock and Angel lock- Only allows the window to open to 50mm for child safety and ventillation
Heritage Sash Lock

Colour Options

We can offer dual colour to suit both internal and external decor. Staining is also available which will allow the natural colour of the grain to emerge. We are able to colour match your windows to Farrow & Bal colours and they are also able to be painted to colour match any RAL colour of your choice.


Double Glazing- available with Argon filled units and Ug values as low as 1.0 W/m2K and Uw values of 1.2W/m2K
Triple Glazing-choice of Argon or Krypton filled units, fantastic centre pane Ug values as low as 0.5 W/m2K with Krypton
Acoustic Glazing- perfect where external noise levels cause a problem. Available in Contemporary and traditional ranges and can be used to achieved decibel ratings up to 45cb

Key Features

The following features are offered by all three ranges:
Bespoke sash divides
Cords and weights or spiral balance designs
Easy clean facility- on cords and weights design only
Trickle ventillation
Horn detail


Our Service Promise

We pride ourselves on our customer service level and the high quality of our products. We have been installing premium windows, doors and conservatories since 2002. We aspire to over exceed every clients expectations from your initial enquiry through to installation.

First Class Guarantee

We now offer a HomePro insurance backed guarantee. This policy allows our customers to have complete peace of mind knowing that their monies are going to be protected at all times. This Warranty Insurance Policy is valid for a period of up to 10 years.

Wonderful Windows are now supplying and fitting Aluco doors, windows, and bi-folds. Inspired by Art Deco and industrial style, the Aluco range delivers a 21st Century solution for this iconic design. To find out more, visit our website.