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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 1.2W/m²K
Bereco timber sliding sash windows not only embody a traditional style but they also achieve excellent energy efficiency to meet the demands of today’s homes. Whether you’re renovating a Victorian townhouse, an Edwardian cottage or a Georgian terrace, you’re sure to find a sash window which perfectly suits your home’s unique character – without compromising on security or weather performance.
Book a consultationOur timber sliding sash windows add real charm and character to any home, helping to replicate traditional designs without compromising on thermal performance.
We can offer two different types of sliding sash styles including spiral balance as well as cords and weights so you can find the perfect match for your project.
Recreate classic designs with our full range of sash products including slim frames, timber only parting beads, baton rods, sash horns and more.
Bereco timber sliding sash windows are available in double or triple glazing. Both are compliant with the updated Part L building regulations and achieve fantastic U-values.
Not only are our sliding sash windows incredible insulators, they also have great noise reduction capabilities, helping to reduce sounds from outside your property.
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, helping to simplify future maintenance.
Styles
Our timber sliding sash windows are available in a variety of styles to suit your property and preferences.
Each style can be customised with your choice of glazing, color, and ironmongery to perfectly complement your home's aesthetic. Whether you're looking for a traditional or contemporary look, our range of styles ensures you'll find the perfect fit for your project.
Book a consultationSingle
A simple, elegant design with one sliding sash.
Single - 33-67
Single with 1/3 over 2/3 sash split.
Double
Two side-by-side sliding sashes.
Double - 33-67
Double with 1/3 over 2/3 sash split.
Triple
Three sliding sashes side-by-side.
Triple - 33-67
Triple with 1/3 over 2/3 sash split.
Colour
Every sliding sash window is beautifully factory finished using the most environmentally friendly water-based paint or stain. Choose from 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 consideration for any project, with our timber sliding sash windows you can choose from single glazing, SlimLine (narrow cavity) glazing, double glazing, or triple glazing. Add glazing bars to create traditional and contemporary glazing patterns using our applied 16mm, 25mm and 35mm glazing bars.
We offer acoustic double glazing with a range of impressive sound reduction ratings, from 33dB to 42dB and a variety of obscure glazing patterns are available offering varying privacy levels (rated 1-5 with 5 being the highest level of obscurity). Our obscure, translucent coloured and opaque painted glass also makes for a great feature.
Frosted (Level 5)
Stippolyte (Level 4)
Niagara (Level 5)
Cotswold (Level 5)
Kocie (Level 4)
Chinchilla (Level 3)
Kora (Level 4)
Delta (Level 5)
Ironmongery
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 Fastener, 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. Click the link below to view our full range of window ironmongery.
Antique Brass
Black
Bronze
Brass
Polished Chrome
Satin Chrome
Rumbled Brass
Rumbled Pewter
Satin Chrome
Satin Nickel
Security
Feeling safe and secure in your home is essential for your peace of mind, that’s why our timber sliding sash windows are Secured by Design accredited, and 3rd Party tested and certified to Part Q.
Secured by Design
PAS 24
ERA Total Security Guarantee
Performance
We’re pleased to share that our products successfully meet industry standards, are fully accredited and have even received certifications related to their security and performance. Check out the complete range of product specifications below.
Secured by Design
Bluesky certified BS644 General Window Performance
BS6180:2011 and BS6399-1:1996 compliant
BlueSky Timber High Performance Window Scheme
FSC® 100% Timber
100% PEFC Origin Timber
BlueSky PAS24:2022 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
With a range of bespoke sizes and designs, our sash timber windows can span widths up to 1.2 meters and reach heights of up to 2.7 metres using any combination of fixed and opening sashes as well as contemporary, traditional or heritage mouldings.
Create traditional styles like horizontal, cottage, Georgian, or marginal bar using our applied 16mm, 25mm and 35mm glazing bars.
Get in touchOur timber sash windows are fully compliant with the updated Part L Building Regulations. We offer double glazing with warm edge spacers as standard which achieve incredible U-values starting from 1.2 W/m²K. We can also supply triple glazing systems which successfully reach U-values as low as 0.8W/m²K for low-energy retrofits.
Book a free home consultationAll of our products are manufactured using certified sustainably sourced engineered laminated timber. We offer redwood (Scots Pine) and hardwood (Dark Red Meranti) and both have the same extensive warranty. When comparing the two materials, our hardwood has more of an open grain structure meaning it gives more of a textured finish, particularly when stained.
Get in touchWe can offer a variety of traditional window features to help you find the perfect match for your home. From slim frames, timber only parting beads, timber staff beads/baton rods to travel stops we can offer a variety of traditional window features to help you find the perfect match for your home. We even have the option of deeper bottom sash rails and seven styles of sash horn so you can replicate any original sash window design from the classic era.
We also have glazing bars available in 16mm, 25mm and 35mm so you can create traditional styles such as horizontal, cottage, Georgian or marginal bar.
Book a free virtual consultationWe have a complete range of design options including curved head frames, curved on plan frames, curved sashes and even curved glass. With dividing or applied bars available in varying widths means we can replicate any of the classical bar patterns.
Contact UsOur sash windows are the only certified noise-reducing timber sash windows offering overall window noise reduction up to 42dB. The windows also feature glazing which achieves a dB rating of up to 47dB which is perfect for reducing noise from outside traffic and antisocial noise from within cities.
Book a consultationWe offer both sliding sash look alike (side hung casement) and regency casement (top hung casement) mock sash designs in our range of contemporary lipped casement windows. This style of windows is ideal if you want the sash window look but is impractical because of narrow reveals. In this instance, a traditional sash window doesn’t offer the clear opening needed to comply with UK escape regulations.
Get in touchOur double glazed timber windows and doors exceed the new Part L 2023 building regulations and can achieve impressive U-values starting from 1.2 W/m²K – which is 15% better than the guidelines. Whereas our triple glazed windows and doors achieve U-values starting from 0.8W/m²K which is 43% better than what’s stipulated in the regulations.
Find out moreOur sliding sash windows are naturally renewable, carbon neutral and made from only certified sustainably sourced softwood or hardwood. The care and attention we give to our timber before and during the manufacturing process ensures a 60 year+ life span, 10-year warranty and low maintenance for life.
SustainabilitySashes 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.
They are a completely different opening mechanisms. The cords and weights option has wider jambs to hold the lead or steel weight, but there is no difference in the warranty we offer.
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.
No you don’t, it’s completely up to you. But if you do want them we have seven different styles to choose from.
Order corner samples of popular products including stain, ironmongery and bars delivered straight to your front door.
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Robson Construction
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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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