Windows - Information

Norfolk Frames believe the best results are delivered using only quality components and systems. Norfolk Frames delivers the best results by forming long term partnering relationships with both its customers and the supply chain.

Norfolk Frames PVC-U windows are manufactured using an ISO14001 registered British-made window system. The system utilise a highly advanced window profile, combining high thermal efficiency with excellent aesthetics and a long, low-maintenance service life.

Norfolk Frames windows deliver optimum sustainability and tenant satisfaction.

Natural, lead-free, sustainable

Norfolk Frames windows are produced in a resource-efficient process using natural raw materials derived from oil and salt. Traditional lead additives have been replaced with calcium organic stabilisers ensuring the safety of window makers, installers and the end user tenant.

Norfolk Frames windows are designed to reduce heat loss through the frame thanks to an advanced four-chamber profile. The efficiency of the frame is maximised further via Thermlock®, a patented thermally enhanced reinforcement. Norfolk Frames create highly energy efficient windows to a consistently high rating under the BFRC window energy ratings system without the need for expensive glass/gas combinations.

The high quality of Norfolk Frames PVC-U and hardware components means little or no maintenance is required. Norfolk Frames windows deliver both sustainability and best value.

Recyclability

At the end of their long service life, recycling of Norfolk Frames windows is simple and easy. The British Plastics Federation (BPF), is committed to continuously improving recycling targets, Norfolk Frames ensures post-use frames are collected and reprocessed rather than being sent to landfill or incineration.

Stylish, secure and reliable

Tenants deserve great looking windows that provide the optimum level of security and safety.Whatever the style – casement, reversible, tilt and turn, vertically sliding sash, plus more – Norfolk Frames manufacture and install windows to suit all requirements, including woodgrain and coloured frames.

Norfolk Frames windows offer optional enhanced security to BS7950 ^[1] providing necessary fire egress in line with Part B of the Building Regulations. Each Norfolk Frames window can be either externally or internally glazed with additional patented security features for externally glazed options.

All Norfolk Frames hardware is designed for long-term function, resistance to corrosion and smooth operation and is fully warranty backed.

Norfolk Frames systems uses a patented and unique reinforcing system - Thermlock ® - which provides greater strength, better window security and better thermal performance than traditional reinforcing.

Conventionally reinforced three chamber profiles struggle to beat the 2.0W/m2K requirement under current Part L regulations (England) and Part J (Scotland).

• Beats 1.8W/m2K - a part J (Scotland) requirement since March 2003 without the need for costly soft-coat glass.
• 35% stronger than standard aluminium on deflection strength.
• 900% better than steel - on torsion strength
• 20% more secure windows - screw pick up ridges make fixing easier. Thermlock delivers 20% greater pull-out strength on handles, keeps, shootbolts and hinge fixings.

Designed specifically to match traditional British windows, the outward opening casement window is available in two styles - standard, and with bevelled rebates.

Each can be either externally or internally glazed with additional patented security features for externally glazed options. Norfolk Frames casement windows are compatible with other Norfolk Frames windows and doors.

Composition

Sections extruded from modified PVC-U complying with BS7413.

Appearance

Smooth surface in white or woodgrain to match traditional casement styling.

Size

Windows are manufactured to customers' specifications. Maximum recommended size for individual top hung opening lights is 1100mm W x 1100mm H. For individual side hung opening lights 700mm x 1300mm - single light.

Fittings & Hardware

Norfolk Frames casement windows can accommodate a full range of hinges and operating mechanisms, which have been designed specifically to achieve optimum weather, safety and security performance for each system. A range of high security and austenitic stainless steel fittings are available.

Maintenance

The espagnolette and friction hinge mechanism should be kept free of debris and sprayed with a lubricant/protective coating at six-monthly intervals.

Designed specifically for the new housebuilding sector, this outward opening casement window has slim, fully bevelled profiles incorporating co-extruded gaskets and weatherseals. This gasket and sealing system is hidden from the glazing sightline eliminating the black edge, usually found in PVC-U systems. These clean, clear sightlines give a most attractive overall aesthetic.

Norfolk Frames 6000 is compatible with other Norfolk Frames windows, doors and curtain walling systems and can be either internally or externally glazed.

Composition

Sections extruded from modified PVC-U complying with BS7413.

Appearance

Smooth surface in white or woodgrain to match traditional casement styling.

Size

Windows are manufactured to customers' specification. Maximum recommended size for individual top hung opening lights is 1100mm x 1100mm. For side hung individual opening lights 700mm x 1300mm. For all queries regarding size, range, design and function.

Fittings & Hardware

Norfolk Frames casement windows can accommodate a full range of hinges and operating mechanisms which have been designed specifically to achieve optimum weather, safety and security performance for each system. A range of high security and austenitic stainless steel fittings are available.

Maintenance

The espagnolette friction hinge mechanism should be kept free of debris and sprayed with a lubricant/protective coating at six-monthly intervals.

The slim pivot window is ideal for use in high and medium rise applications where cleaning of the exterior glass requires to be carried out fromthe inside. Suitable for both first fix and refurbishment applications, the slim pivot uses specifically designed pivot profiles which combine elegant sightlines with high weather performance.

The window is internally glazed for security and has a uniquely designed mullions/transom, which allows the construction of multilight, fixed light and combination windows. Norfolk Frames slim pivot windows are compatible with other Norfolk Frames windows and doors.

Composition

Sections extruded from modified PVC-U complying with BS7413 ^[2]

Appearance

Smooth surface in white with sightlines to match traditional pivot styling.

Size

Windows are manufactured to customer specification. Maximum recommended sizes for individual opening lights is 1500mm W x 1500mm H, although larger sizes are possible.

Fittings and Hardware

The hinge mechanism allows 180° movement. The hinges have friction adjustments for both control and balance and can incorporate safety restrictors, which operate when the window is in the fully reserved position. The closure is a shoot bolt which effects mechanical closure at the bottom rail and head of the window, giving a four point locking arrangement.

Maintenance

Espagnolette and shoot bolt mechanisms should be kept free of debris and sprayed with a lubricant/protective coating at six monthly intervals. The slim pivot window is ideal for use in high and medium rise applications where cleaning of the exterior glass requires to be carried out from inside.

The traditionally styled Norfolk Frames pivot window features a rebate between outer frame and pivoting frame to active optimum weather performance. Designed to be hinged either horizontally or vertically, the traditional pivot is ideal as a replacement for timber or aluminium pivots in office, hotel and residential blocks, as well as for newbuild applications and is internally glazed for security. Norfolk Frames standard pivot windows are compatible with other Norfolk Frames windows and doors.

Composition

Sections extruded from modified PVC-U complying with BS7413 ^[3]

Appearance

Smooth surface in white or woodgrain with sightlines to match traditional pivot styling.

Size

Windows are manufactured to customer specification. Maximum recommended sizes for individual opening lights are 1500mm W x 1600mm H, although larger sizes are possible.

Fittings and Hardware

The hinge mechanism has a built in child restrictor and allows 180° movement. The hinges have friction adjustments for both control and balance and incorporate safety restrictors, which operate when the window is in the fully reversed position. The closure is an espagnolette operated shoot bolt which effects mechanical closure at the bottom rail and head of the window as well as multiple locking points on the bottom rail.

Maintenance

Espagnolette and shoot bolt mechanisms should be kept free of debris and sprayed with a lubricant/protective coating at six monthly intervals.

The Norfolk Frames reversible window systems offers specifiers the widest range combining fixed and opening lights, internally or externally beaded and featuring either a rebated casement or flush finish. A range of transom and mullions provide additional configurations in a window whose opening style is ideal for medium and high rise dwellings and office or hotel accommodation. Norfolk Frames top and side reversible windows are compatible with other Norfolk Frames windows and doors.

Composition

Sections extruded from modified PVC-U complying with BS7413 ^[4]

Appearance

A smooth surface finish in white or woodgrain, with sight lines designed to match traditional casements. Either rebated or flush finish appearance is available.

Size

Windows are manufactured to customers specification. The maximum recommended size for individual opening lights is 1250mm W x 1600mm H, although larger sizes are possible. For all queries regarding size, design and function contact L.B Plastics' Specifier Support Department.

Fittings and Hardware

The top reversible is fitted with a unique hinge, allowing the window to open out traditionally, retaining the advantages of a casement but reversing for safer cleaning from inside the property. The window is balanced at all angles and has a locking restrictor on both the initial opening position and also on the fully reversed position.

The hardware for a side reversible is similar in operation but allows the windows to be opened on a horizontal axis. This gives over a 90% open area and is often used in compliance with fire regulations.

Maintenance

The sliding friction block within the hinge channel does not require oiling. Any espagnolette mechanism should be kept free of debris and sprayed with a lubricant/protective coating at six monthly intervals.

The Norfolk Frames range of tilt and turn windows offer a wide choice of sashes, system styles and bead finishes to provide optimum appearance, weather performance and ease of operation. European in its styling, the tilt and turn window has gained popularity in both the commercial and domestic sectors, particularly where cleaning from the inside is a requirement. Norfolk Frames tilt and turn windows are compatible with other Norfolk Frames windows and doors.

Composition

Sections extruded from modified PVC-U complying with BS7413 ^[5]

Appearance

A smooth surface in white or woodgrain.

Size

The windows are manufactured to customers specification. Maximum recommended size for individual opening lights is 1550mm W x 1550mm H, although larger sizes are possible.

Fittings & Hardware

Norfolk Frames tilt and turn windows incorporate the Winkhaus tilt and turn gear which has a large number of safety/security options available. A tilt first function is available, as is a concealed gear option, in which the top and bottom hinges are hidden between the sash and main frame.

For further details on some of the options please refer to the Norfolk Frames fittings and hardware manual section 2 - or contact L.B Plastic's Hardware Division.

Maintenance

The tilt and turn mechanism should be kept free of debris and sprayed with a lubricant / protective coating at six monthly intervals.

Widely accepted for use in conservation areas, the vertically sliding sash provides a high performance, high security window, which replicates the design and styling of the timber sash it replaces. Available in three different sash profiles, the VS tilts in for easy cleaning and can be produced with both Gothic and Norman arched top sashes. Norfolk Frames vertically sliding sash windows are compatible with other Norfolk Frames windows and doors.

Composition

Sections extruded from modified PVC-U complying with BS7413 ^[6]

Appearance

A smooth surface in white and sight lines to match traditional styling. Bottom rail size can be altered and there is a choice of sash profiles. Decorative additions include horns, white gaskets and deep bottom rails.

Size

Windows are manufactured to customer specifications. If both sashes are to slide and frames are to be double glazed the maximum overall size of window is 1400mm W x 2500mm H. Larger sizes may be produced if one sash is fixed. Choice of sash profile and balance system may be affected by size. Tilt action options are not recommended for sash over 50lbs weight.

Fittings and Hardware

A wide range of fittings and hardware has been designed to ensure lasting high performance of the window. These can include traditional brass sash lifts, locking fasteners, variable position restrictors, tilt support arms, ventilators and opening A-bars. Much of the bespoke hardware has been produced in plastic or anti-corrosion stainless steel.

Maintenance

The balance channels should be kept free of debris and do not require lubrication.

A large range of ventilators are available.

Composition

Ventilation systems are to be constructed of PVC-U matched to that of the Norfolk Frames window system or of proprietary products available in aluminium or PVC-U.

Appearance

Due to the range of options available, appearance can be altered to suit specification requirements, by either locating the ventilator over or through the framing.

Size/capacity

All Norfolk Frames ventilation systems are designed to comply with the Building Regulations requiring 4,000mm² free area per habitable room.

Options

The specifically designed ventilation system, to suit all styles of window allows up to twice the requirements of the Building Regulations, is visually unobtrusive being placed on top of the window, and operates with a simple pull mechanism. Built in sound attenuation is also available. As there is no integral routing into the window system, this means that there is no possible weakening or exposure to the elements of the frame system.

Standard Ventilators - these are normally located either through the frame or through the rebates of the frame, to facilitate ventilation.

Most Norfolk Frames windows, doors and curtain walling systems are available in white or woodgrain finishes.
Three different approaches are used to achieve these:

Through-Frame Pigments

Both wood effect and white finishes are achieved by adding stable pigments to the polymer, resulting in an even distribution of colour and a smooth surface appearance. They comply with BS7413 for all aspects of long term performance. The pigment systems used have been developed following extensive natural weathering trials and artificial ageing studies over a 30-year period.

Woodgrain Foil Finishes

Several different timber effect finishes including light oak and mahogany are fused to the surface of the profile by means of a heated silicone wheel. The woodgrain foil is fused to the PVC-U in the absence of any substrate using heat and pressure.These foil finishes meet all the requirements of the British Standard for surface coated PVC-U profiles BS7722. Independent weathering tests carried out by the BRE to the method of tests in BS7413 for white profiles show excellent adhesion, gloss and colour retention.

Specialist Paint Finishes

In recent times, specialist paint formulations have been introduced, which are designed to etch into the surface of the PVC-U, giving good long-term bonding and adhesion. The advantage of these finishes is the extended colour range possible.