The BLENHEIM range of spirally hung, sliding sash windows has been developed to satisfy the needs of today's market for cost effective high performance, low maintenance sliding sash windows that are acceptable not only to premier brand house builders but to planning authorities and architects alike.

Our bespoke service meets the aesthetic requirements for listed buildings within conservation areas.

Operation
Sashes are operated by pre-tensioned, heavy duty spiral spring balances.

Tailor-made Styles & Mouldings
Each window in the range is tailor made to order using our proven sections and ovolo moulded in keeping with traditional practice. Virtually any size, style and shape can be produced within practical limitations to give specifiers complete freedom of choice and proportion, suiting both refurbishment projects and new developments.

Materials and Construction
Windows are manufactured in European Redwood, from managed P.E.F.C. sources or in any species of hardwood specified. All joints are formed using advanced machining methods and purpose designed tooling.

Glazing
Both single and double glazing can be supplied. Single glazed sashes can incorporate either putty profile beading or left open to accept putty by others. Chatsworth windows are supplied factory glazed in accordance with BS 6262.

Health and Safety
Windows calculated to exceed CDM recommended limits are supplied de-sashed if necessary, for ease of handling. Blenheim windows incorporate a removable timber staff bead, allowing ease of sash fitting on site without the need for re-decoration.

Security
Sections within the entire MH Joinery range have externally beaded profiles in line with good joinery practice. Factory glazing incorporates a proven security tape.

Building Part 'L'
MH Joinery's entire product range has been subjected to a thermal simulation test as described in ISO 15099. All products passed with thermal conductivity readings in line with Document Part 'L'.

Acoustic Glazing
MH Joinery has extensive experience in the field of sound reduction. Further advice is available upon request.

Applied glazing bars
After much deliberation, MH Joinery accepted the applied bar solution as the only was of satisfying both planners and insulation requirements within building regulations. This has now been incorporated into our entire range of windows and doors.

Ventilation
To avoid hindering the aesthetic lines of the window, we can provide ventilation discreetly through the head of the frame.

Performance
The Blenheim range of windows has been fully tested in accordance with BS 6375 Part 1.

Preservative
All softwood timber frames are preservative treated using double the vacuum impregnation process as required by the NHBC.

Finishes
Windows are supplied as standard in a semi-finish of one basecoat of stain/primer plus one topcoat of water based stain/micro-porous paint. A full factory finish is available. When site decorating, it is important that care is taken to avoid contact with operational parts of the window, as paint applied to weather stripping and ironmongery will impair overall performance.

Ironmongery
The standard ironmongery package includes one brass Fitch fastener (2no. to sashes over 900mm wide) and 2no. brass sash lifts.

Security/safety
A range of safety and security fittings are available as an optional extra.

Blenheim range of optional extras
The following optional extras are available where applicable to clients own specifications.

• Sash horns to match existing or clients own profile.
• Extended linings.
• Extended cills.
• Groove for water-bar on underside of cill.
• Hardwood cills.
• Alternative ironmongery styles & finishes
• Sash pulls ('D' handles).
• Security/restrictor locks.
• Full factory finish.
• Sash fitting service. 

Complete joinery package
As well as windows, we can produce a complete range of external joinery products to customers own specifications, such as doors, door frames and French casements, ensuring continuity and compatibility wherever our windows are used. We also offer a full design service with comprehensive technical support.