Manufactured in the USA since 1955, Kalwall is a structural composite sandwich panel formed by permanently bonding, under heat and pressure, specially formulated, fibreglass-reinforced translucent faces to a grid core of interlocked, structural aluminium/composite, thermally broken I-beams.
Kalwall panels are factory prefabricated to the exact size and configuration for each project. Panels can be flat or curved and opening or fixed glazed window can also be incorporated using the integral Clamp-tite™ installation system.
Kalwall’s unique composition combines to reduce solar gain whilst maximising thermal insulation. Kalwall diffuses light so efficiently that even direct sunlight is converted into evenly-distributed daylighting, without glare or shadows. Panels can be selected to transmit various percentages of light according to individual project requirements. The standard 70mm thick panel offers insulation up to 0.28W/m2K - equivalent to a cavity filled solid wall. 100mm panels are also available to increase maximum span.
What Is Kalwall?
Kalwall diffuses light so efficiently even direct sunlight is converted to even, glare-free illumination. It gives a soft restful light in work areas free from sharp shadows and contrast. This lighting environment prevents eyestrain, increases efficiency and saves energy.
Even on cloudy overcast days, Kalwall will enhance natural light and transmit it into the building in surprisingly large volumes. Panels can be selected to transmit various percentages of light according to individual requirements.
Kalwall has the ability to transmit large amounts of usable light with a relatively low level of light transmission. Less radiant energy transmitted, coupled with diffusion, does away with the hot spots which are so common to other light transmitting materials.
The broad diffusion of light over a large area reduces the need for sunblinds, shades and louvres. When the building is lit at night the Kalwall will glow softly presenting a striking external appearance.
Maximises Thermal Insulation
As Kalwall is light transmitting, it is required to meet the insulation provisions for windows and rooflghts. Considerable flexibility is therefore possible as the product can offer much lower 'U' Values than those prescribed, with good solar performance.
'U' Values from 1.25W/m2K to 0.28W/m2K are available. These are lower than can be achieved with any other light transmitting material.
Where thermal insulation is not important, such as on canopies or for use in unheated spaces, Kalwall can be provided without insulation.
Controls Solar Heat
Kalwall's low level of solar heat transmission and rediffusion results in a comfortable environment and will reduce air-conditioning costs.
Durability tests carried out for European Technical Approval resulted in a predicted life of 50 years.
Kalwall proprietary technology will maintain colour, erosion resistance and light transmission. UV protection is built into the full thickness of the face sheets with colour stable resins. It does not rely on gel-coats or other superficial, sacrificial coatings. Fibre exposure and fibre bloom are prevented by the inclusion of a glass veil laminate embedded in the outer sheet.
Kalwall is highly resistant to impact - excellent for use in schools, gymnasia, offices, public buildings and others subject to high traffic or vandalism.
Kalwall has excellent fire retardant properties. It is a thermo-set material, which, unlike thermoplastics or glass, will not drip, melt or shatter in a fire. Kalwall achieves an internal Reaction to Fire rating of B-s2,d0 when tested to EN13501-1, EXT: AA for roofs (BS 476 part 3) and Broof t4. Kalwall panels can be specified as Factory Mutual (FM) approved.
Kalwall is light in weight, usually between 12 and 16 KG/m2, minimising the need for supportive structure. Large panels can be installed very quickly with a minimum number of junctions.
Kalwall is virtually maintenance free in normal environments. Rainfall is usually sufficient to keep Kalwall free from dust and dirt. A periodic soapy water wash and clear water rinse is all that is needed both externally and internally. For most roof applications, additional external cleaning apparatus is usually unnecessary.
Quality Assurance and Testing
Kalwall is manufactured to a stringent quality assurance programme in accordance with the Factory Production Control protocol specified in the European Technical Approval.
To arrange a presentation or to find out more about the Kalwall system, please contact Lasse Sorensen on 01233 501 504 or contact us here.
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