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6-8 weeks current supply only lead time
10 year warranty, 60 year life expectancy
10-12 weeks current supply and installation lead time
Designed by you, made to measure by us
97% of our customers would recommend us
Double glazed whole window U-values as low as 1.3W/m²K
Timber double hung sash windows offer the perfect combination of traditional elegance and practical functionality for both period and contemporary properties. Unlike single hung windows where only the bottom sash moves, double hung sash windows feature two independently operable sashes that both slide vertically, providing exceptional ventilation control and cleaning convenience.
At Bereco, we’ve been designing and manufacturing premium timber double hung sash windows since 2003, creating bespoke windows that honour historical design while incorporating modern thermal performance and security features.
Book a consultationOur double hung sash windows combine classic period aesthetics with practical modern functionality, featuring two independently moving sashes for superior airflow control and convenience.
Both the upper and lower sashes move independently, giving you complete control over ventilation.
Every window is made to measure to suit your exact requirements. We can create timber double hung sash windows up to 1.3 metres wide and 2.7 metres high, ensuring a perfect fit.
Our premium timber, expert craftsmanship and high-quality finishing processes ensure your timber double hung sash windows are built to last for generations.
Available in 16mm, 25mm and 35mm profiles to create Georgian, cottage, horizontal or marginal bar patterns.
Find the perfect high-quality timber windows and doors for your home renovation, extension or self-build project today.
Discover how our exceptional timber windows and doors can perfectly complement your trade project – whatever it may be.
Spiral Balance is our most popular style of sash window featuring maintenance-free, semi-concealed, in-frame spiral balances. The balances are available in white, brown, black or cream to match your chosen finish, and can be completely concealed to not detract away from the window's traditional style.
Our cords and weights sash windows are the essence of traditional design, featuring lead or steel weights, nylon sash cords with exceptional tensile strength and draught-proof axel pulley wheels. Available with an easy clean facility as well as internal access to the internal and external sash weight pockets.
Colour
Every sliding sash window is beautifully factory finished using the most environmentally friendly water-based paint or stain. Choose from any RAL Classic, RAL Design, NCS and BS colour charts or match to Farrow & Ball, Earthborn or Fired Earth colour collections. With single or dual colour options you can create the perfect match to the exterior facade and interior decor of the property.
Paint & Stain FinishesRAL 9016
Linen
Parchment
BS.10.B.15
RAL 9001
Parlour
RAL 1015
BS.10.C.31
BS.10.B.17
RAL 7032
RAL 7030
RAL 6019
French Green
RAL 6021
RAL 6005
London Dust
RAL 5014
RAL 5013
RAL 5022
RAL 3002
RAL 3011
RAL 3005
Smoke
RAL 7035
RAL 7040
RAL 7037
RAL 7015
RAL 7016
RAL 7024
RAL 9005
RAL Colour
Glazing
Glazing is an important design element for any project and can make all the difference when creating a feature window or door. A variety of obscure glazing patterns are available with different designs offering varying privacy levels (rated 1-5 with 5 being the highest level) for your home.
Delta (Level 5)
Kora (Level 4)
Chinchilla (Level 3)
Kocie (Level 4)
Cotswold (Level 5)
Niagara (Level 5)
Stippolyte (Level 4)
Frosted (Level 5)
Hardware
Our timber sash windows come fitted with fitch fasteners, hook lifts and opening restrictors. You can choose from two designs of fitch fasteners known as The Fitch Lock or the Brighton Fasterner, three different designs of the opening restrictor and key operated vent lock, the push and twist vent lock or the angel vent lock.
Our cords and weights windows also come with round end pulley wheels as well as optional D handles and ring lifts. With single or dual colour options you can even perfectly match the outside and outside of your property.
Security
Dedicated to delivering security you can rely on, we guarantee our secure sash windows are fitted with the best window hardware which is Secured by Design and Part Q certified, helping to deter unwanted intruders.
With a range of fitch fasterners, hook lifts and opening restrictors available, you can choose the most suitable product for your needs to guarantee complete peace of mind.
Technical
Secured by Design
Bluesky certified BS644 General Window Performance
BS6180:2011 and BS6399-1:1996 compliant
BlueSky Timber High Performance Window Scheme
FSC 100% certified timber
BlueSky PAS24:2016 Enhance Security Windows
BlueSky Noise Reducing Windows up to 42dB over all window
UKCA Mark
UW RANGE: 0.8 – 1.4 W/m²K
ACOUSTIC RANGE: 29 – 42dB
G-VALUE RANGE: 0.50 – 0.65
AIR PERMEABILITY: 600 PA (CLASS 3)
WATER TIGHTNESS: 250 PA (CLASS 6A)
WIND LOAD RESISTANCE: 2000 PA (CLASS 5C)
EXPOSURE CATEGORY: 2000 PA
AIR LEAKAGE: 0.8M³ per hour
Timber double hung sash windows are a sophisticated type of sliding sash window where both the upper and lower sashes move vertically within the frame, rather than just the bottom sash as in single hung designs. This double operation provides exceptional versatility – you can open the top sash to let warm air escape, the bottom sash to draw fresh air in, or both simultaneously for maximum ventilation.
The sashes slide smoothly past each other and can be held in any position, giving you precise control over airflow.Available with either traditional cord and weight systems or modern spiral balance mechanisms, timber double hung sash windows suit both heritage restorations and contemporary new-builds alike.
Get in touchOur sliding sash windows are crafted from premium sustainably sourced timber that’s FSC® 100% or 100% PEFC certified, ensuring every window meets the highest environmental standards.
We offer redwood (Scots Pine) and hardwood (Dark Red Meranti) and both have the same extensive warranty. The care and attention we dedicate to timber selection and preparation helps ensure an up to 60+ year lifespan, giving you windows that will grace your Essex home for generations to come.
Get in touch
Every timber double hung sash window we create is made to measure, ensuring a perfect fit for your property. Our windows can accommodate widths up to 1.3 metres and heights up to 2.7 metres, with any combination of fixed and opening sashes to suit your specific requirements. Choose from contemporary, traditional or heritage moulding profiles to match your home’s architectural style.
Create authentic period designs such as Georgian, Victorian, cottage or marginal bar patterns using our range of applied glazing bars available in 16mm, 25mm and 35mm profiles. Select from seven different sash horn styles to replicate original features, opt for deeper bottom rails for Victorian proportions, or choose slimline frames for Georgian elegance.
Book a consultationOur timber double hung sash windows deliver outstanding energy efficiency without compromising traditional aesthetics. The natural thermal properties of timber, combined with modern glazing, create windows that keep your home comfortable year-round whilst reducing energy consumption and lowering heating bills.
Available in with double and triple glazed options, they comfortably exceed the latest Part L 2023 building regulations. Our double glazed timber double hung sash windows achieve impressive U-values starting from 1.3 W/m²K – representing a 7% improvement on the guidelines. For superior efficiency, our triple glazed options achieve U-values starting from 0.8W/m²K, which is 43% better than regulatory requirements.
Book a consultationIn double hung sash windows, both the top and bottom sashes are operable and slide vertically, whilst in single hung windows only the bottom sash moves and the top sash remains fixed. This makes timber double hung sash windows significantly more versatile – you can open either sash independently or both together for maximum ventilation. The ability to open the top sash is particularly valuable as it allows warm air to escape from the upper part of the room whilst drawing cooler fresh air in through the bottom sash.
Sashes slide vertically within the frame. At Bereco we offer cords and weights sliding sash windows, which is a traditional weight and pulley system. We also offer spiral balances which are a tensioned spring mechanism where a coiled spring is discretely concealed inside an encased coloured tube to match the windows finish.
We offer sash windows in traditional cords and weights or a modern spiral balance method of operation featuring traditional or heritage style mouldings and bars that are perfect for replacement windows or conservation areas.
At Bereco we don’t offer a tilt facility. This style of window usually comes with unsightly and non-compressing brush seals that can affect weather performance. However, our cords and weights option is available with an easy clean system that allows the bottom sash to open inwards side hung.
Even though we can offer this, both our hardwood and redwood timbers have the same warranty and are engineered from defect-free timber that is preservative-treated and fully factory finished. At Bereco every individual timber element of our windows is treated with preservative using the most technologically advanced coating systems from Teknos, which is why we can offer our 30-year warranty against rot and fungal decay.
Absolutely. Modern sash windows with clean lines, minimal glazing bars and contemporary colours suit modern homes beautifully. The distinctive style and excellent insulation of traditional timber sash windows work perfectly in new-builds. The combination of traditional aesthetics with modern performance makes them a popular choice for contemporary living space designs.
Our timber sash windows are built to last, with an up to 60+ year lifespan when properly maintained. This exceptional durability comes from using premium FSC® 100% or 100% PEFC certified sustainable timber, combined with craftsmanship by our skilled team. The quality of the finished job is paramount to us – we use multiple coats of high-quality paint or stain finishes and precision-engineered components to ensure longevity. Unlike uPVC windows which can become brittle over time, timber is a naturally durable material that can be maintained and refinished, making it a sustainable long-term investment that can add to your property value.
Yes. We create replacement sash windows that replicate your original design whilst incorporating double glazing or triple glazing. This dramatically improves thermal efficiency and sound insulation, reducing heating costs and external noise whilst maintaining the traditional look and character of your home. The upgrade delivers significant energy savings and comfort improvements.
Order corner samples of popular products including stain, ironmongery and bars delivered straight to your front door.
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As a dedicated manufacturer of quality timber windows and doors, we are part of a number of specialist memberships and schemes. Check out the full list below.
We’re pleased to announce our brand has featured in several national magazines and publications over the years. Here are some of the most recent places our products have been showcased.
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