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GGP August 2015

ALUMINIUM What to look for in a door David O’Mara, from door manufacturer Hörmann, explains how aluminium entrance doors With the rising cost of can offer market leading quality, security and ‘U’ values. energy, minimising heat loss from houses is now more important than ever. New product developments and the latest construction techniques mean that the building fabric is not the only element under close scrutiny. Every material has its pros and cons. It’s important to remember that there are well built and poorly constructed versions of any door, so choose a reputable manufacturer that’s had success with its product. The quality of the installation is equally as important as the quality of the door itself. Ensure a full understanding of the product’s functionality is attained and any installation guides are followed. Some manufacturers will even provide training to ensure dealers are confident in fitting their products correctly. Strength, stability, security Timber has been used for entrance doors for centuries for its rigidity and insulating properties. Timber doors can be painted and sealed but maintenance is required to keep them in their prime. PVC-U doors are the most affordable option and require little maintenance but they offer less charm than other materials and could even decrease the value of a property, particularly with period homes. Composite and glass-reinforced plastic (GRP) models are both relatively thermally efficient and durable choices that last with minimal upkeep. However, it’s metal doors, such as steel and aluminium, which offer the best strength, stability, security and style options, with many models available with different finishes, including wood effect. Aluminium doors are among the most thermally efficient designs available with some even having the insulating properties required for passivhaus status, i.e. achieving ‘UD’ values (the ‘U’ value of the fitted door) of 0.8 W/(m²K) or lower. As “outstanding insulation levels aren’t the only advantage of aluminium entrance doors” such, aluminium is the perfect choice for use in low carbon building projects or for those looking to save on energy bills. Hörmann’s ThermoCarbon and ThermoSafe aluminium entrance door ranges are prime examples of how thermally efficient this material can be. With ‘UD’ values as low as 0.47 W/(m²K) and 0.8W(m²K) respectively, these doors offer ground-breaking insulation levels. Taking the ThermoCarbon as an example, its overall insulation properties are maximised by its polyurethane-filled 100mm-thick door leaf, carbon fibre glass profile and thermal break. Even with glazed options or alternative styles, standard triple or quadruple-glazed panels ensure that the lowest possible UDvalues are maintained. It’s also worth noting that aluminium has exceptional soundproofing qualities as well. But outstanding insulation levels aren’t the only advantage of aluminium entrance doors. Many of the doors on the market incorporate high-quality security features, making them a particularly secure option. Look for designs with multi-point locking systems, and a combination of conical swing and security bolts that pull the door tightly shut. Some can even offer three further security bolts on the hinge side, making break-ins practically impossible. Having glazing incorporated into the door’s design doesn’t mean that its security levels need to be compromised. Hörmann’s glazed styles have 8mm-thick laminated safety glass on the interior and exterior of the insulated glazing to provide added security. Metal doors are frequently available in a range of colours, finishes, textured surfaces and styles, enabling you to create a visually stunning entrance that complements any design choice. The insulation levels of garage doors should likewise be taken into consideration, especially for properties with integral garages. Attack tests Features to look out for are insulated door panels, seals around the door and a thermal break, which creates an air gap between the door frame and the building, offering up to 15% better insulation. Like houses, garages are often home to thousands of pounds worth of possessions, so as the main point of entry, the garage door should be as secure as possible. Police approved Secured by Design accreditation has been assigned to sectional garage doors, meaning that these doors are able to withstand a series of stringent attack tests. When specified with Hörmann’s ProMatic or SupraMatic operator, the company’s insulated or timber sectional garage doors have achieved this status. As Hörmann’s range demonstrates, garage and entrance doors can be both highly secure and thermally efficiency without having to compromise on style or appearance. 50 www.ggpmag.com August 2015


GGP August 2015
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