H Turn Windows (Secured by Design)

As standard, the windows are made from quality redwood or hardwood. The range is constructed from generously proportioned timber sections.

Standard finished sections are:

Frame Head 92 x 68mm 
Frame Jamb 92 x 68mm 
Frame Sole 92 x 68mm 
Sash Head 66.5 x 56mm 
Sash Stiles  66.5 x 56mm 
Sash Sole 66.5 x 56mm

The 'H' type window has been tested independently to BS 6375 Part 1 and has achieved the following ratings:

Air permeability 600Pa
Water Tightness  300Pa
Wind Resistance 3,000Pa

Minimum glazing rebates of 47 x 20mm on the sash allows fully drained and vented system with an end capped polyester coated aluminium bottom bead. The beading is fixed using a specialist fixing system to enhance product integrity and appearance. 28mm (4/20/4) ‘Low E’ double glazed sealed units are factory fitted as standard.

Specialist glass units, including bronze anti-sun and leaded, can be fitted on request. A range of glazing bars and astragals are also available on request.

All products are treated with preservative after all machining. This is applied by means of a double vacuum process in accordance with BS5589:1989 (or BS8417:2003) and NHBC recommendations. Such treatment enables us to offer a 30 year warranty against rot or fungal decay. The coatings used as standard are water based in accordance with the company’s environmental policy.

Our extended coatings warranty may be available on ‘H’ type windows that are fully finished in our factory. Please ask for further details.

A range of ventilators can be fitted that comply with current Building Regulations. Such ventilation is through the head and is semi-concealed to eliminate unsightly and vulnerable external canopies. In addition, on request, the hinge can be modified to remain open in a position at approximately 100mm from closed, for ventilation purposes.

Using the renowned Spilka hinge system, sashes are fully reversible but do not protrude into the room and therefore do not impinge on curtains or blinds.

A safety restrictor is incorporated on hinges on all sashes. Locking is via a single handle on espagnolette bolts. Brown coloured handles are supplied as standard, but a wide range of designs and finishes are available on request.

When fitted with the requisite ironmongery, our ‘H’ type window has been independently tested to and meets the criteria of BS 7590: 1997 Specification for enhanced security performance. A copy of the test report is available on request.

We provide a full technical back-up service covering all aspects of product and glazing performance.

Technical information, including detailed drawings, guidelines for installation and storage and operating and maintenance instructions, is available on request.