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Flush Casement

John Watson Joinery

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Awning/Top hung Casement/Side hung Timber/Wood

Technical Specification


Our unique double rebated design gives the ultimate weatherproofing as well as a very modern design. We are able to offer balanced or unequal sashes giving unrivalled flexibility. Our standard timber is John Watson Joinery’s own Pineheart Engineered Softwood which has been developed to offer greater performance than standard engineered timbers allowing us to offer a greater quality product. Flush Casement Our windows are fully factory finished as standard with a water-based paint or stain system which is not only environmentally friendly but when maintained correctly offers a timber guarantee of 35 years. The standard 90mm frame section houses our 58mm sash which can be offered with our bevelled design or a soft square section. We offer an extensive Ironmongery range with our hinges being able to hold sashes from 0 – 65kg both restricted and unrestricted. The handles, trickle vents and other ironmongery can be customised to suit any property style and enhance our window designs.


Nominal sizes for framing and sashes as follows:

Jambs 72mm x 56mm
Head & Cills 72mm x 67mm
Mullions & Transoms 72mm & 66mm
Sash Stiles & Rails 70mm & 50mm
Cills are grooved to receive an internal or external cill.
Top/side hung casements fitted with friction hinges, shoot bolt & espagnolette locks with locking handles which are available in silver, brass, black or white.

Maximum sash sizes:

Top hung Sash 1140 x 1129
Overall frame size 1200 x 1200
Flush Casement Side Hung Sash 540 x 1229
Overall frame size 600 x 1300


Ground Floor laminated 6.4mm with a 16mm Argon filled cavity and 4mm Low E toughened, clear or obscure.
Trickle vents to windows as requested.
JWJ offers a 10 year guarantee on externally beaded factory glazed units.
Low E glass is supplied as standard when factory glazing is specified. Alternatively, non-Low ‘E’ glass is available on request.
JWJ Secure windows are factory glazed with annealed Low ‘E’ glass as standard.
26.4mm double glazing – JWJ windows have a glazing rebate 15mm deep and 42mm wide which mets NHBC regulations and allows for 26.4mm double glazing (6.4:16:4). The windows are therefore able to assist meeting Building Regulation’s Part L.

Drained & vented glazing
In order to ensure glazing units are installed correctly to meet the requirements of the 10 year guarantee, drained & vented bottom beads are supplied as standard, complete with nylon spacers fitted.


Stormproof butt hinges are supplied as standard, optionally reflex hinges are offered.
Reflex hinges fitted as standard with friction hinges on top sashes and fanlights. Other hinge types are optionally available. Hinge locks are fitted for additional security protection.

Where frames are to be divided vertically by mullions this is normally in equal proportions.


Quality Management System – BS EN ISO 9001:2008
High Performance wood windows suitable for areas of severe exposure as defined in BS 644, BS 7950, ISO 9002.
Optional sub Cill sizes to suit structural requirements.
Timber in accordance with BS 1186 part 1 (1986)
FSC Accredited.
PEFC Chain of Custody. BM Trada Certified.
John Watson Joinery
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John Watson Joinery Main Contact

John Watson Joinery
Usworth Road Industrial Estate Belle Vue Way Hartlepool

TS25 1JU
United Kingdom

Tel: 01429 222023


Other locations for this company:

About the Company

John Watson Joinery was established in 1973 in Wingate, County Durham, as a manufacturer of high quality timber doorsets and windows. With almost 40 years of experience in supplying the UK social, public and commercial housing market, we have developed a unique range of products to meet today's stringent requirements for security, weather protection and durability. Our commitment to producing outstanding quality products for our customers, together with an exceptional level of customer service has been central to our success and will remain an integral part of the company's philosophy.

Based at our modern production unit in Hartlepool, North East England, John Watson Joinery has been continuously manufacturing high quality Timber Doorsets and Windows to a variety of sectors ranging from the medical profession to student accommodation, hotels and apartments.

We pride ourselves in the quality of our work and attention to detail, and the quality of all the products and services provided by John Watson Joinery is fundamental to the success and development of our business; therefore it is our policy to consistently achieve and deliver the highest standards of quality. Working with pride, care and a profound respect for the unique character in every piece of timber, the craftsmen of JWJ have earned a deserved reputation.

Today, John Watson Joinery reflects this philosophy of respect, pride and care. The latest equipment and an open, pleasant, working environment allow John Watson Joinery to blend their long experience with the precision of woodworking technology.

Our product knowledge is diverse and our engineering methods allow us to produce a magnitude of timber doorsets & windows. With a vast selection of locking options and a significant range of hardware, we can produce that truly individual door with a personal touch that cannot be matched.

All John Watson Joinery doors and windows carry an extensive range of guarantees, covering the timber, the hardware and a variety of finishes. Your peace of mind is an integral part of the products and service we offer.

If you need someone that’s reliable, affordable and that delivers high quality work; then give us a call. We’re renowned for all the above and have a long list of happy customers. Our team have experience in working on projects of all sizes and many of our clients have worked with us for a number of years.
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