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The Window Sanctuary provides excellent timber sash windows in Tonbridge. Timber sash windows exude charm, capturing the magic of the Victorian era while providing a warm and comfortable living space free from draughts. If timber sash windows have caught your eye on homes around Tonbridge, then The Window Sanctuary is delighted to help you create this spectacular look for your home. The Window Sanctuary is Tonbridge’s local expert for timber sash windows.

At the Window Sanctuary, we provide two types of sash windows in Tonbridge that suit properties of all periods, including Edwardian, Victorian, or Georgian.

Our traditional sash windows are made of timber and are highly recommended as they offer 28mm double glazed units with the highest energy rating, providing thermal efficiency and compliance with recent building regulations.

Our products undergo a rigorous 5-stage process to ensure they are protected and long-lasting. They are painted with 3 coats of micro-porous paint, allowing them to withstand the elements with minimum maintenance for up to 10 years. With over 200 RAL colours to choose from, these windows complement and improve the overall look of your home.

Our traditional timber sash windows are designed with lead weights and ropes within the frames to counter-balance the weight of the sash. We replace all ropes and weights when we install new windows. Alternatively, we can install a spiral balanced hinge instead, allowing the windows to open and close without the use of ropes and weights. You can also specify bespoke window furniture such as Fitch fasteners or Board & Clasp fasteners.

For period properties with existing timber windows, we offer heritage sash windows that replicate the original designs and can accommodate high-performance, slimline, sealed units. Heritage sash windows are suitable for listed buildings or those in conservation areas and are designed with twelve individually glazed units. This option is much better than installing secondary-glazing, and we can assist with your planning application if required for a nominal fee.

Upgrade your sash windows in Tonbridge with the Window Sanctuary and enjoy the fresh character and warmth they will bring to your home.

Energy saving insulation

With our energy-efficient thermafloat warm-edge sealed units, our timber sash windows offer an exceptional overall U value of 1.5 w/m2k. By upgrading to the glazed version, you can enjoy an even lower U value of 1.1 w/m2k, keeping your home warm and reducing your heating costs. To ensure maximum protection from draughts, our seals are made from Q-Lon, and our lockable furniture is PAS 24-compliant. Choose from a wide variety of quality fittings available in complementary finishes.


A rigorous 5-stage process ensures that each of our products is protected and painted, and can withstand the elements with minimum maintenance.

Our method is:

Stage 1 – A chemical dip to minimise moisture absorption
Stage 2 – A chemical dip to protect against fungi, insect infestation, and mould growth
Stage 3 – Application of primer and undercoats using micro-porous products
Stage 4 – Spray finish first coat according to your colour choice
Stage 5 – Spray finish second coat

Micro-porous paints allow all timber fibres to be penetrated and to build up protection from within, unlike cellulose paints which form a skin on the outer face and require time-consuming treatments on a regular basis. To keep new products in pristine condition, we recommended a quick wipe down and a further coat be applied after approximately 7 years.

Windows in Tonbridge conservation areas

Our timber sash windows will sympathetically replicate the original designs and can accommodate high-performance and satisfy the requirements of your local Conservation Officer.


Our Google Reviews

  • Replaced front and side door plus a few windows, very happy with the quality, great sales experience and fitters were friendly. We had a small issue with the door which was quickly fixed

    Robert Francis Avatar Robert Francis
    February 9, 2020
  • I cannot recommend “The Window Sanctuary “ enough. We have a very modern property with large expanses of glass, Aluminium frames were advised and were very competitively priced. The level of customer service was exceptional throughout, the installation process caused minimal disruption and the finished windows and Bi-fold doors look fantastic

    meena kharade Avatar meena kharade
    October 31, 2019
  • If you've ever built a house you'll appreciate how hit and miss glass contractors can be, but The Window Sanctuary stand out as reliable, good quality and easy to deal with. The guys turned up on time, worked really hard and did a fantastic job. I wouldn't hesitate to recommend this company.

    Rebecca Stiasny Avatar Rebecca Stiasny
    February 24, 2021
  • The team did a great job installing new sash windows in our flat: the wood grain effect on their PVC looks great, they took away our old windows and worked swiftly, on time and on budget to get the new ones fitted. I can definitely recommend them! Thanks!

    Claire C Avatar Claire C
    February 24, 2020
  • Very professional. I have used other window companies before but the service provided by them left much to be desired when compared to Window Santuary. Any snagging problem was promptly sorted out by the management promptly and to our satisfaction. The workers were very punctual, came daily and stopped only when fully finished. I would highly recommend this window company to others.

    Raghu Lall Avatar Raghu Lall
    October 30, 2019