Glass & Glazing
Clearwood UK INNOVATION Ranges are factory glazed using a dry glazing system that uses a drained and vented aluminium or timber bottom bead system.
Since April 2006 all new applications for planning have been subject to Document L., which is the part of building regulations that covers the energy efficiency standard to be achieved in buildings. Energy efficiency means increasing the thermal insulation in building materials thus cutting back on wasted heat in order to help our environment. In window and door products it means that the windows used will need to achieve up to a maximum U – Value of 2.0W/m2K.
Clearwoods "D" Energy rated INNOVATION Range window has a BFRC rating of 1.7W/m2k, which exceeds all the minimum standards set out in Document L for new builds, replacements and extensions.
Low-E (Low emissivity) is a thermally insulating glass. A transparent metallic coating is applied to one side of the inner pane of the double glazed unit: this reduces the heat loss through the glass by reflecting heat back into the room.
The two types of coating are a soft coat or hard coat which relates to the manufacturing process used.
As a holder of the ISO 14001 accreditation, Clearwood UK takes care to ensure our business constantly monitors and wherever possible reduces any impacts our manufacturing has on the environment.
It also keeps rooms at an ambient temperature and reduces cold spots, draughts and condensation on the inside of the glass.
This type of glazing requires no special maintenance because the coatings are applied to the inside of the unit.
Download the Fire Escape Minimum Opening Sizes for the INNOVATION ranges (Adobe Acrobat Reader required).
The Standard Glass and Glazing Specifications for each of the Clearwood UK Ranges are as follows:
The INNOVATION Range
Innovation "B" Energy Rated Window
Energy Index (kWh/M2/year) -6
Thermal Transmittance (U window) 1.3 W/m2 K
Solar Factor (g window) 0.39 W/m2.K
Effective Air Leakage (L factor) 0.00 W/m2 K
- Pilkington; Optiwhite (4mm)
- 90% Argon & 10% Air (Cavity Filling)
- Edgetech Superspacer (20mm)
- Pilkington Optitherm (4mm)
Innovation "C" Energy Rated Window (BFRC & EST Registered)
Energy Index (kWh/M2/year) -12
Thermal Transmittance (U window) 1.3 W/m2 K
Solar Factor (g window) 0.36 W/m2.K
Effective Air Leakage (L factor) 0.00 W/m2 K
- 4mm Clear Float
- 90% Argon & 10% Air (Cavity Filling)
- Edgetech Superspacer (20mm)
- Saint – Gobain Planitherm Futur N (4mm)
Innovation "D" Energy Rated Window (BFRC Registered)
Energy Index (kWh/M2/year) -25
Thermal Transmittance (U window) 1.5 W/m2 K
Solar Factor (g window) 0.36 W/m2.K
Effective Air Leakage (L factor) 0.00 W/m2 K
- 4mm Clear Float
- 90% Argon & 10% Air (Cavity Filling)
- Aluminium Spacer Bar (20mm)
- Saint – Gobain Planitherm (4mm)
Innovation "E" Energy Rated Window (BFRC Registered)
Energy Index (kWh/M2/year) -35
Thermal Transmittance (U window) 1.7 W/m2 K
Solar Factor (g window) 0.36 W/m2.K
Effective Air Leakage (L factor) 0.00 W/m2 K
- 4mm Clear Float
- 100% Air (Cavity Filling)
- Aluminium Spacer Bar (20mm)
- Saint – Gobain Planitherm (4mm)
Under the July 2000 Building Regulations approved document “B” (Fire Safety) there is a requirement that windows in habitable rooms in one or two storey domestic dwellings and also flats and maisonettes that have an upper floor level which is no greater than 4.5m, must be capable of providing an escape route in the case of fire.
Windows that meet this requirement must have an unobstructed opening area of at least 0.33m2 and have a minimum opening dimension of 450mm in either width or height, with the remaining dimension big enough to achieve the total area of 0.33m2.
The bottom opening area of the window must be between 800mm and 1100mm from the room’s finished floor level.
For your guidance we have supplied a list of the most common window configurations that meet the Doc -“B” regs for fire escape for each product range.
However we strongly recommend that you should check and confirm that these window configurations and sizes comply with the Doc -“B” regs for the intended project with your architect or building control officer prior to placing your order.
See Also
Technical Illustrations
Sign up to our newsletter
Downolad our latest brochure
Download the latest Clearwood UK Brochure. Download