Topping off our roofing special this week, we have insulation to keep Hatfield eggheads toasty, a curvy roof making waves in Manchester and some seriously sexy shakes in Bath – plus an expert shares his specification penchants and bugbears
Smouldering tile colour
Lafarge has added a new colour, Ember, to its range of Redland Heathland tiles. The Ember tile has a dark traditional appearance similar to handmade plain tile roofing according to Lafarge and can be manufactured at a lower cost. Larfarge says that market research has revealed that customers wanted a naturally weathered finished tile with a darker sooted finish and burnt orange colour. The Heathland Ember tiles also have random-sanded, irregular edges. The manufacturer adds that the aged appearance of the tiles makes them particularly suitable for refurbishment projects. The Heathland Ember comes with matching fittings and accessories.
Lafarge 601

Flag flies in Gosport
Flag's single-ply roofing products have been used in the redevelopment of St George's Barracks, Gosport, by Sunley Homes. The original asphalt roof had deteriorated in many areas. The entire roof was overlaid with Kingspan insulation and waterproofed using the Flagon SFC fleece-backed fully adhered system. The 1.5 m high upstand walls were boarded over with timber and covered with Flagon SV. Several new roof areas were waterproofed using Flagon SFC and standing seam profiles to simulate a metal roof. Flagon SR, a polyester reinforced membrane was also used on the balconies and the listed 200 m long canopy.
Flag UK 602

Over-the-top storage solution
Ward Insulated and MITIE Roofing have put their heads together to come up with an over-roofing solution for a Big Yellow Self Storage building in Bow, London. The original roof comprised asbestos cement roof sheets with north light glazing, coupled with concrete flat roof areas at differing levels. Ward TopDeck pre-insulated membrane roof was fixed over a lightweight steel framework of Ward Single Skin Wall Profiles and a Ward Capella lightweight galvanised truss system. The existing structure was exposed where necessary to provide an interface for the installation of the over-roof system, which has a one-degree pitch.
Ward Insulated Panels 603

Zinc-coated aluminium
Corus Building Systems has introduced FalZinc, an aluminium based cladding and roofing product that the company claims has the aesthetic qualities of zinc. It has an aluminium substrate onto which a zinc surface is permanently fused. Corus claims that FalZinc is a third of the weight of traditional zinc and achieves the same weathered appearance. Corus says it offers protection against corrosion, is easy to fold at low temperatures with no heating required, and is also demountable and recyclable.
Corus Building Systems 604

Press on the gutter
Marley Plumbing and Drainage has launched a Deepflow Plus guttering system. The seven gutter fittings of the original Deepflow product have been redesigned, and six tools and a "twin-extrusion" line have been introduced to produce and install the gutter. Deepflow Plus can either be fitted with the traditional notched system using lugs, or by fixing the fittings direct to the fascia board of the building. Marley has also introduced the Easyclip, which the company says makes it easier to joint the gutter and fitting.
Marley Plumbing and Drainage 605

Anyone for standing seam roofing?
A Euroclad Euroseam 400 standing seam roof has been specified for the refurbished South Devon Tennis Centre near Ivybridge. Over 3200 m2 of curved sheeting was installed together with Euroclad's 32/1000 liner tray. Long lengths of the Euroseam profiles were formed on site and craned into place by roofing contractor Progressive Systems. The roof spans the whole tennis centre, which includes a main show court, three smaller courts side-by-side, and a high-level observation walkway.
Euroclad 606

Watertight advice from Icopal
Icopal has published a 22-page brochure on Sure-Weld TPO, a roof waterproofing system. Sure-Weld TPO is a PVC-free single-ply roofing system. The brochure provides information on the composition of Sure-Weld TPO and details on system selection including sample specifications for mechanically fastened, fully adhered and ballasted systems. There is also information on thermal insulation and details on available accessories, including vapour control layers.
Icopal 607

Brochure covers ridges and valleys
Marley Roofing has produced a technical brochure for its range of dry fix products for the ridge, hip, valley and verge. Details are illustrated using sectional drawings and cutaway isometric illustrations. Fixing notes are supplied along with product data, components required for each system and dimensions of key components. Marley says the brochure will help designers to satisfy the requirements of BS 5534 Code of practice for slating and tiling (including shingles).
Marley Roofing 611

Icy reception for cold-rolled purlins
Multibeam cladding support systems from Kingspan Metl-Con (formerly Ward Building Components) have been used in the construction of the National Ice Arena in Sheffield. As well as offering structural strength the Multibeam systems also provide a feature in the ceiling of the 1500-seat arena. The Multibeam cold-rolled purlin sections were manufactured to order and pre-engineered to suit the client's design requirements.
Kingspan Metl-Con 612

Laminated I-joists span The Cape
Finnforest's Finnjoist I-joists in spans of up to 4.9 m have been specified by housebuilder CDC2020 for the roofs of The Cape development in Rottingdean, East Sussex. Finnforest says that the combination of wood laminated Kerto-S flanges and an oriented strand board web produces lighter and stronger spans, and reduces build time. Finnforest says that Kerto does not warp or twist and has more load-carrying capacity than most other timber.
Finnforest 616

Hats off in Hatfield

Roof insulation by Kingspan has been used in the construction of the new de Havilland Campus for the University of Hertfordshire at Hatfield. Contractor SIAC Construction specified insulation from Kingspan’s Therma range for both the metal and concrete decks of the flat roof to achieve the required thermal performance. In total SIAC installed 6000 m2 of CFC/HCFC-free Thermaroof TR26 zero ODP in two layers of 70 mm and 85 mm on the roof of the Academic Building and Learning Resource Centre. The product has a Class 1 fire rating and a thermal conductivity of 0.022 W/m2K.
Kingspan Insulation 600

Clark Shoes stretches to an E

Clark Shoes has specified 42,300 Kalzip E Clips for its new 30,000 m2 distribution warehouse in Street, Somerset. Kalzip says its E Clip and liner deck system allows thermal bridge-free roofing and wall cladding constructions, which can achieve U-values of 0.13 W/m2. Incorporating a low profile structural deck, the system has been designed for new buildings where purlin centres are greater than normal. Kalzip says the clips have been tested for structural performance, including wind suction, load compression and durability.
Kalzip 608

Single-ply roofing gets vetted

Alkor Draka single-ply roofing products have been used on three roofs of the latest phase of the animal clinical centre at the Royal Vet College’s Hawkshead Campus in Hertfordshire. One steel and glass structure has a 180 m2 waveform roof consisting of a metal deck, Alkorplu LDPE vapour control layer and rigid polyurethane insulation topped with mechanically attached Alkorplan PVC waterproof membrane. The second 160 m2 roof section has a metal deck base, Alkorplus VCL and rigid mineral wool insulation overlaid with mechanically fastened Alkorplan. The final building is a warm pitched roof of 300 m2 with a plain galvanised deck, Alkorplus VCL, rigid polyurethane insulation and mechanically fastened Alkorplan.
Alkor Draka 609

Argos gets brighter solution

Brett Martin Daylight Systems has supplied its Trilite GRP rooflights for a 65,000 m2 distribution centre for Argos in Burton on Trent. The triple-skin rooflights were assembled on site and make up 15% of the total roof area. The roofing contractors Roofdec used Trilite as an integral part of the CA Group’s Twintherm roofing system. Brett Martin says that the combination achieves a U-value of 2.2 W/m2K to meet Part L of the Building Regulations and offers a Class 1 fire rating.
Brett Martin 610

Easy-to-keep verge system

Lafarge has launched the Ambi-Dry Verge System, which the company says provides a maintenance free verge for slates and five profiled tiles from the Redland range. There are terracotta, brown and grey versions which Lafarge says can match all the slates, tiles and other details of the roof. There is no need for an undercloak of mortar verges, which Lafarge says reduces installation time and removes the problem of mortar being washed out. It also means that it can be fitted in wet weather.
Lafarge 613

Straight up

Mark Brown of Measur Construction Consultants talks concrete, slate and photolaminates What’s been your best ever specification?
The smooth, stone-like, fairfaced concrete walls (using Visqueen on ply formwork) at King Henry’s Road, a new private house designed by Jamie Fobert Architects What’s been the best product innovation of recent years?
Plastic jointless pipework such as Hep2O What construction product do you swear by?
Jansen section window frames What material will we all be using in five years time?
Facing brickwork with lime mortar What’s the most overused, cliched building product currently in use?
Photolaminate ‘timber’ laminate flooring – yeuch … Is there any red tape that keeps you awake at night?
SMM7 – the Standard Method of Measurement of building works What’s your favourite roofing product?
Welsh slate