Our affordable crafted wooden sash windows combine heritage style with modern thermal and noise reduction features for a warmer and quieter home
our windows draught sealing
Unlike most windows companies, we fit seals into your new window as standard. Using sets of Q-Lon weatherproof seals offers optimal draft sealing, noise reduction, and allows your windows to slide smoothly eliminating sash rattle.
The first thing that most of our customers say is that they are amazed at how much quieter & warmer their home is since they have had their new windows installed, and how much it has improved their quality of life.
Fitting & Installation
Our experienced installation Fensa member teams will ensure that the work is carried out to the highest standards and with the utmost care and consideration for your home.
Our installation service includes:
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Internal protection from dust and dirt
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Making good on both inside and outside walls to a ‘sanded and ready to paint
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New external ‘mortar pointing’ around the outer edge
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Disposal of old items.
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Our fitters will take care to protect your property while they are working and will leave everything in a clean and tidy condition.
Always you are safe with us.
When using our fitting services, and as members of the FENSA scheme both your deposit and warranty are independently insured with an insurance backed guarantee policy from The Independent Warranty Association (IWA), more details available on the IWA website. In addition to your FENSA certificate your new windows will also be registered with your local authority as legal and compliant with building regulations, this is vital if you ever decide to sell your property.
All of our products are 'Made in Britain' from start to finish. Welcome to come to our workshop in North London at any time for checking the process of your order.
Can you match my existing windows?
Design Build Joinery offer a range of sash window styles. Each sliding sash window is bespoke and made to measure in our workshop in North London. We can recreate your existing window design and glazing patterns, allowing you to retain the period look of your home. If required we can also make your sash windows conform to listed building and conservation area requirements, using a combination of our conservation designs, heritage double or slimline glazing, or single glazing & putty. Check out our conservation and listed building windows here.
we are proud of the installation for the matching our sash windows with the existing ones
Our Quality & Price Promised
All our sliding sash windows are manufactured to high standards from top quality materials and come complete with a comprehensive 10-year guarantee as standard. Check out our guarantees here.
Our sash windows are perfectly balanced and they slide effortlessly with one hand, with exacting glass standards,you’ll love how beautiful our windows are.
We only use the highest quality slow grown Grade 1 pine, meranti hardwood, European oak or Accoya™ for all windows and doors, the choice is yours.
As you’d expect we offer all kinds of glazing such as acoustic and obscure patterns. All our double glazing units have spacers to match the paint colour of the wood, so it’s difficult to tell our windows are even double glazed, this is critical in order to keep an original look to your windows and property.
we know all about providing our customers with exceptional value - we've been doing it for years.
We'll BEAT any like for like quote
including any Sale Offers! Let's prove it
6 EASY STEPS TO YOUR NEW WINDOWS
FREE QUOTE
FREE SURVEY
BESPOKE YOUR WINDOWS
INSTALL YOUR WINDOWS
SECURE PAYMENT
WORK GUARANTEED
Design Build Joinery windows are Hand crafted to the highest quality from sustainable timber and installed by our own specialist Fensa member fitters.
Our bespoke, double-glazed wooden box sash windows are manufactured in our own facility in North London and can be designed to match any existing window style, including Victorian and Georgian as well as contemporary styling.
Our box sash windows meet UK conservation criteria (including listed buildings) and building regulations, providing crafted affordable timber windows with modern thermal insulation qualities
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Bespoke, hand-crafted timber sashes
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Constructed using the original style and design to fit your home
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Low maintenance and easy to look after
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Save up to 31% on heat loss
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Draught proofing included as standard
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Security locks & safety glass
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Listed buildings, conservation areas
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Great prices available
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Warranties for paint, glazing & timber
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Teknos or RAL colour, microporous paint
We'll Beat any sale price, Let's Prove it.
We're so confident of the value of our products that we offer a 'Price Promise'. Find the same quality product for less in our service area within 7 days and we'll beat the difference. The like for like quotation must be for a product that we are able to supply and must be of the same size, same design, and same quality.
Simply let us know the competitor's name and product details (accompanied with a copy of the original quotation you have received) – we’ll then verify the price and, if the competitor’s service conditions are the same as ours, we’ll beat the price or refund the difference as appropriate.
We'll BEAT any like for like quote
including any Sale Offers
We'll always do our best to respond to every email within 48 hours, but if you'd prefer us to quote you a price straight away, then give our friendly sales team a call on 0800 130 3003 during office hours.
Design Build Joinery offers two Sash Window Double Glazing Solutions
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Replacement slim double glazed sashes, installed into your existing sash box (window frame)
2. Complete new double glazed Seal Box windows
1. REPLACEMENT SASHES
Replacing original single glazed sliding sashes with bespoke double glazed sashes means you can get a double glazed solution without major disruption to the property. If the frames are in good condition, we can replace just the sliding parts, saving you money, minimizing disruption, and retaining the heritage of your home. Alternatively, we can manufacture and install complete new timber box sash windows including the frame.
TIMBER
The replacement sashes are manufactured from the finest timber, the choice of which will depend upon preference and budget.
GLAZING
We install slim glazing units, allowing us to manufacture sliding sashes using traditional carpentry methods, including solid glazing bars (instead of ones attached to the glass) which help to retain the window’s authentic look and feel. Another main feature of the slim glazing unit is the reduced sightline of the spacer bar between the two panes of glass, allowing us to manufacture narrower glazing bars and thereby closely replicating the existing sashes.
DOUBLE GLAZING SPECIFICATION
Slim 12mm or 14mm double glazed units, Planitherm Total+ glass (outer pane) and gas-filled a cavity.
Centre Pane U-Value of 1.5 Wm²K
Total Window U-Value of 1.8 Wm²K
2. DOUBLE GLAZED SEAL BOX
Our bespoke, double-glazed wooden box sash windows are manufactured in our own workshop and can be designed to match any existing window style, including Victorian and Georgian as well as contemporary styling.
Our box sash windows meet UK conservation criteria (including listed buildings) that comply with Part L of Building Regulations. providing crafted timber windows with modern thermal insulation qualities.
TIMBER
We select only the finest timbers from renewable sources, the choice will depend upon preference and budget.
GLAZING
As with the replacement sashes, we use slim glazing units, allowing us to manufacture sliding sashes using traditional carpentry methods, including solid glazing bars (instead of ones attached to the glass), to maintain the window’s authentic character and charm.
The reduced sightline from the double glazing units allows us to utilise narrower glazing bars, so we can recreate the majority of historic and traditional sash styles.
DOUBLE GLAZING SPECIFICATION
24mm (4/16/4) double glazed units, Low E internal glass keeps your home warm+Low iron outer glass and gas-filled cavity.
Centre Pane U-Value of 1.2 Wm²K
Total Window U-Value of 1.5 Wm²K
The Conservation™ range is equipped with a suit of frames and glazing bar profiles for you to select, all of which can accommodate the three glazing unit thicknesses on offer (12mm, 14mm & 24mm)
LET'S TALK ABOUT YOUR PROJECT!
OUR PROFESSIONAL TEAM WILL HELP YOU FIND THE BEST SOLUTION
FELL FREE TO CALL US!
0800 130 3003
