A dry-fix ventilation system has been introduced by Lafarge Roofing Systems, formerly known as Redland Roofing Systems. The Rapid Vented Ridge and Rapid Hip systems include the Metalroll ventilation protection roll, which Lafarge says makes it easier to achieve a weatherproof fit.
Lafarge claims that in trials the Rapid Hip and Rapid Vented Ridge systems were installed 33% faster than equivalent systems using wet mortar.
To mark the change of company name, Lafarge has relaunched its roofing website. From April the site will include a CAD library of 5000 high-quality roof drawings that have all been updated to comply with the latest Building Regulations, including Part L. The site also features ViewMaster, which allows specifiers to experiment online with various coloured roof tiles. The Redland name has not entirely disappeared – it is now the brand name for Lafarge Roofing's UK product range.
Lafarge Roofing Systems
Thermal and acoustic insulation
Knauf Insulation has expanded its range of products: Crown Wool, the glass mineral wool used in the thermal and acoustic insulation of pitched roofs, is now available in 170 mm thickness; and Crown Factoryclad, the glass mineral wool insulation for profiled metal-clad buildings, is being offered in thicknesses of up to 200 mm. The company has also launched Crown Factoryclad Plus, which is designed for twin-skinned built-up roofing systems where high thermal performance is required without an increase in thickness. Knauf Insulation has CE-marked its entire range of glass and rock mineral wool products to comply with the Construction Products Directive 89/106/EEC.
The Kingzip guide
Kingspan Insulated Panels has introduced a 20-page guide for Kingzip, its new pre-engineered roofing system. Construction details for verges, eaves, hips, valley gutters, barrel vaults and rooflights are included in the guide, and each can be downloaded from the Kingspan website.
Zippy standing-seam roofing
SpeedDeck Building Systems has launched SpeedZip, a mechanically zipped standing-seam roofing system. The galvanized-steel system can be manufactured on site using a mobile production unit or in the factory, in lengths of up to 40 m. SpeedZip can be used for convex, concave and waveform shaped roofs and can be supported by SpeedDeck's range of structural decks. Reinforced Plastic (GRP) rooflights are also available from SpeedDeck for straight, convex and concave roofs.
SpeedDeck Building Systems
Doubly dense insulation boards
Rockwool has introduced Hardrock Dual Density insulation boards for flat roofing systems. Hardrock DD satisfies the requirements of the new thermal and fire Building Regulations. It also has a high-density top surface, which makes the boards very resistant to compressive loads, according to the company.
Tile-effect panels on visitor centre
Ward has supplied its pre-engineered, pre-insulated metal roof tile system to the new agricultural visitor's centre in Otley, Suffolk. Ward says the original roof timbers were unable to support the weight of traditional roof tiles which is why the client opted for the lightweight insulated tile-effect panels. The roof tile's single-fix installation fits directly onto purlins, eliminating the need for battens, roof felt and separate insulation materials, says Ward, and mimics the look of natural clay pantiles.
Ward Building Components
Flame-free bitumen application
Icopal has developed a flameless method of applying its FireSmart torch-on bitumen roofing system. The FireSmart Application gun uses turbine technology to create temperatures of between 800 and 1000°C without generating a naked flame. There are two application systems available: the hand-held supporter unit (for detail work) and the automatic side lap welder (for welding laps). FireSmart is a roofing system using Pyrozenic bitumen, which is formulated from volcanic silicone rock. This enables the system to withstand very high temperatures and exceed the fire standards in both Europe and the UK.
Antiquated roof tiles
Sandtoft Roof Tiles has launched the Arcadia, a new clay pantile that is designed to emulate the character of an aged or reclaimed English clay pantile. Sandtoft says the manufacturing process results in a random finish, which creates a weathered look. The tiles are 17.5 mm thick and come with a 60-year guarantee.
Copper roofing expertise online
Copper in Architecture has expanded its website to include all the detail drawings from its new technical roofing and cladding guide, Copper Roofing – In Detail. It also includes: CPD material on copper in general; animation of the patination process; coverage of topics such as environmental implications and comparative costings; numerous projects and a link to other European copper site project pages. The 120-page technical guide includes the latest techniques from Europe including the long strip method, and machine seaming on site. It is available for £25 from the Copper Development Association.
Copper In Architecture
PVC cover for Oxford bookstore
The Blackwell bookstore in Oxford has just been fitted with a new single-ply PVC roof membrane from Alkor Drakka. A new metal deck was fitted onto existing steels and then covered with an Alkorplus vapour control layer, a 60 mm rigid CFC-free insulation board and finally an Alkorplan F 35170 single-ply waterproofing membrane. Membrane joints, roof penetrations, edge, corner and parapet details were sealed using a combination of Alkorplus 81025 solvent fluid, hot-air welding and other accessories from Alkor Drakka.
Alfred McAlpine Slate has extended its range of natural roofing slates with the launch of the Celtic tile. The slates have naturally occurring markings that give it a textured finish, according to Alfred McAlpine. The Celtic tiles are available in blue–grey or dark blue–grey and come in a range of sizes.
Alfred McAlpine Slate
Curved planes at Farnborough Airport
What’s the spec?Air traffic control tower, Farnborough Airport
The specification of the aluminium roof for the new air traffic control tower at Farnborough Airport was as complex as the twisting curved geometry suggests. Reid Architecture had to find an affordable system that could clad the fluted 35 m high control tower and the wing-shaped structure at its base. Reid approached a number of cladding and roofing suppliers but their solutions were either over-budget or over-complicated. At one point a boat-building yard was approached to help develop a seamless skin, but its prices proved too high. The solution chosen by Reid was developed in conjunction with German-based Mero, which specialises in Space frames and shingle construction. A diamond shaped pattern was created with aluminium shingles, which the architect says resembles a tightly stretched metallic snakeskin. The shingles connect to a more traditional curved Kalzip roof on the base building. The roof structure of the control tower is supported by four simple columns positioned at the rear and cantilevered at the front to minimise obstructions.
Architect: Reid Architecture
Main contractor: Bovis Lend Lease
Structural, M&E and facade engineer: Buro Happold
Quantity surveyor: Davis Langdon & Everest
Roll-moulding system for complex roofing
Guttering for large commercial schemes
Marley Plumbing and Drainage
Renovation matches Scottish slates