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Thermal Performance

Press Release:

Brital systems are specifically designed for the special environmental and manufacturing conditions that prevail in the Middle East. "The system designs originate from the design house of one of Europe's leading facade engineering companies", says Richard Lee, Brital's Manager Director.

Lee states that most of the systems bought into the region before today were originally designed for cold external conditions of the types that prevail in Europe and North America. We recognised early on that clients, fabricators and building users in the region required slightly different requirements with thermal breaking designed to accommodate hot outside conditions and cool internal.

Richard explains "The conductive performance or heat loss from a facade is affected by a number of factors these primarily being convection, conduction and radiation. The main factors to be considered in the design of a curtainwall or building facade primarily relate to the issue of conduction or transmission of heat through the physical construction".

From an architectural perspective there is little that can be achieved by careful design to reduce the effects of convection and radiation from or into a building other than by the careful selection of spandrel and glass materials.

The U value or the conductive loss through a building's facade is dictated by 4 factors, these being:

1. The U value of the glazing material.

2. The U value of the framing system.

3. The ratio of glass to aluminium.

4. Ψ (Psi) - this is a mathematical constant that relates to the losses of the abutment of glass or panel to the framing system.

The ultimate insulating performance of the facade being governed by the glazing or panel materials, the thermal losses through the framing system, the interaction between the two and the design by the curtainwalling subcontractor of the interface between curtainwall and structure, aspects in which Brital like to have an active involvement.

Brital have therefore developed curtainwall system products that reflect the growing need for environmentally enhanced thermal and acoustic performance recognising the need in the UAE amongst commercial clients for "greener" buildings.

One other important feature is that the systems have been developed recognising UAE manufacturing facilities and have therefore designed products that meet the real market conditions. An important consideration, for example, is that we need to be sure that the site conditions don't reduce the mechanical integrity of bonded joints in structurally glazed curtainwall systems.

The systems were therefore developed so that the actual glazing process (the means of physically sticking the glass to the frame) could be undertaken in proper factory-controlled conditions therefore improving the finished quality. Obviously we are all aware of the consequences of the failure of these types of bonds with the potential detachment of the glass from the building's elevation and whilst much of the curtainwall assembly takes place on site, we really needed to know that this process could be completed correctly in controlled factory conditions.

Richard, being well known in the area, especially amongst the architectural profession and major fabricators, saw real merit in being able to offer facade systems to the market through good manufacturers providing whatever supplementary technical support that was needed from the UK through the Brital systems house.

There is now a range of proven systems available including fully structurally glazed, 2-sided structural glazing, fully capped curtainwalls, thermally broken and non-thermally broken windows and doors (both sliding and casement), louvres, etc.. Uniquely, manufacturing costs are lower than equivalent systems and a need for expensive capital equipment has been minimised by making all of the jointed aluminium connections between components square cut reducing machine costs.

Brital facade systems are only available through licensed partner curtainwall and cladding companies in the UAE.

Thermal Analysis