Subscribe to newsletter

Submit Article

 



Editors Note: Dow Building Solutions provide:

  • Flat roof insulation

  • Cavity wall insulation

  • Roof insulation

Home

Advertise Here

Request Quote

CPD Seminar

 

Advertise Job

Advertise Job

Terms & Conditions

Terms & Conditions

Contact Building Design

Contact Building Design

e-mail Building Design

e-mail Building Design

 

- Building Design - Services & Construction Products Index

Request Information

Links Page

 


 

DOW BUILDING SOLUTIONS - Rock Wins Full Marks For Tackling Deflections

Roof waterproofing specialist Rock was called in to provide technical and practical support on a major schools building project – par for the course for a market-leader, but it was unaware that it would end up solving a testing industry issue at the same time.

When a major contractor was commissioned to rejuvenate and rebuild over 20 schools in the North West it turned to 40-year roofing veteran Rock to install traditional inverted roofs on the first two projects to get the green light. With both buildings set to open for the new term in September - and construction being managed on existing school sites close to residential areas - it was vital that the project was safely managed within tight timescales. Cost-effectiveness and client satisfaction were of course also key.

With large expanses of flat roofing to cover – and energy efficiency as well as waterproofing a core client demand – the kit specified was Rock’s Flexiphalte triple protection system, a fully bonded high performance waterproofing system combining three core elements: a high performance membrane, overlain by durable Flexiphalte Pommar polymer modified mastic asphalt and covered with a 180mm thick layer of ROOFMATE SL-A insulation from Dow Building Solutions. The system was covered with ballast and paving slabs to produce a standard inverted roof finish.

“We recommended Flexiphalte triple protection for this job because we believe it gives a level of protection that cannot be matched by any other type of roofing system or membrane, giving “lifetime” performance equal to the substrate upon which it is laid,” said Mike Goddard, Rock’s Construction Director. “We felt ROOFMATE SL-A was the right insulation choice because it’s readily available, robust with a high compressive strength, easy to work with and we’ve seen its long-term performance first-hand.”

However, it was prior to installing the ROOFMATE insulation that Rock, in collaboration with the lead contractor, wanted to ensure adequate drainage - without having to resort to the cost of laying additional screed on what had already been designed as a ‘zero pitch’ roof.

Although BS 6229:2003 recommends that an appropriate fall be accommodated on roof designs where there are continuously supported coverings, the British Board of Agrément (BBA)’s Information Bulletin No.4 acknowledges zero pitch roofs, emphasising the need to ensure drainage is sufficient and effective. Both designs are considered correct practice as long as drainage is adequate – but for zero pitch roofs this means any possibility of deflections must be designed-out in order to ensure water will not pond on the roof.

With a project already running to tight timescales and within strict cost limitations, the estimated six figure additional cost associated with adding screed and potentially raising parapet height was not an option. Rock’s solution was to carefully survey the roof for deflections and add additional Flexiphalte Pommar asphalt to potential problem areas, enabling a completely flat finish and ensuring water would run off to drainage outlets already specified and installed.

“The additional asphalt fuses entirely with the existing layer meaning we can still provide a fully-bonded system - but with no deflections,” continued Mike. “We’ve developed a solution that can either be built in at design stage where a zero pitch roof is favoured for cost reasons, or as a retrofit solution if deflections need to be addressed once the asphalt waterproofing has been completed.”

“This project was a great example of a main contractor, specialist roofer and materials supplier coming together to develop a solution for the ultimate benefit of the client,” said Richard Powell, Roofing Manager for Dow Building Solutions. “It’s thanks to that positive approach that the industry has found a method of addressing deflections in a cost-effective way based on existing, proven solutions.”

For more information about how Rock’s Flexiphalte triple protection system can be used to help prevent deflections and information about Rock’s other roofing solutions, visit www.wearerock.co.uk. For product and stockist information on ROOFMATE SL-A visit www.styrofoam.co.uk or email below.

Note: JPA Technical Literature has produced a paper entitled “A review of recent guidance on inverted roof construction” which summarises European Technical Approval Guidance 031 (ETAG 031) on inverted roofs and BBA Information Bulletin No. 4. To download a copy visit the Dow Building Solutions website at www.styrofoam.co.uk.


Altro Safety flooring Wall cladding Resin flooring Sports flooring News 120911

Armstrong Energy saving heating Speed pumps Variable speed pumps News 150911

Azur Solar Solar PV Solar panels Photovoltaic panels Solar heating News 120911

Balcony Systems Glass juliet balconies Juliet balconies Juliet balcony railings News 130911

Carea Wall cladding Cladding panels External cladding Cladding systems News 150911

Carrier Air conditioning Heating systems Air handling HVAC systems News 1409111

Catnic Steel lintels Wall supports Masonry supports Wall ties News 140911

Collingwood Lighting LED lighting LED downlights Commercial lighting Retail lighting News 120911

Dulux Trade Dulux paint Trade paint Dulux trade Metal paint News 120911

Elliott Modular buildings Portable buildings School buildings Portable offices News 130911

Flowcrete Commercial Flooring Resin Flooring Sports Flooring Flooring Solutions News 160911

Flowcrete Flooring systems Resin flooring Commercial flooring Floor screeds News 130911

Forticrete Forticrete tiles Roof tiles Facing blocks Walling stone News 120911

Huntsman Green roof systems Water management systems Green roofs News 150911

Ibstock Ibstock bricks Clay bricks Facing bricks Brick pavers News 120911

John Brash Cedar shingles Roof shingles Scaffold boards Timber decking News 140911

JS Humidifiers Steam humidifiers Steam boilers Air curtains JS humidifiers News 120911

Knauf Drywall Dry lining Dry wall lining Dry floor screed News 140911

Knauf Marmorit Facade systems Concrete render Brick render Render systems News 120911

Lafarge concrete Readymix concrete Cement products Lafarge cement News 150911

Laidlaw Door hardware Door sets Balustrade systems Timber doorsets News 130911

Leaderflush Shapland Door furniture Door hardware Door ironmongery Door sets News 130911

Marley Eternit Roof tiles PV systems Photovoltaic systems Solar panels News 150911

Marley Plumbing Drainage systems Drainage pipe Soil pipe Rainwater systems News 120911

Marshall-Tufflex Electrical cable Cable management Cable trays Cable baskets News 140911

Mira Shower heads Shower cubicles Shower valves Shower controls News 150911

Monodraught Natural ventilation Wind catchers Natural daylight Air handling News 140911

Monodraught Ventilation heat recovery Natural ventilation Heat recovery systems News 150911

Neptunus Temporary structures Semi permanent structures Marquee tent hire News 120911

Polyflor Vinyl flooring Vinyl tiles Safety flooring Acoustic flooring News 130911

Polypipe Drainage pipe Underground drainage Plastic pipe Ground drainage News 160911

Portview Fit Out Office fit-out Office refurbishment Retail fit out News 120911

Profile Lighting products Emergency lighting Commercial lighting Internal lighting News 140911

Rada Mira showers Shower valves Mixing valves Shower fittings News 120911

Renderplas Plastering beads Plaster beads PVC beads Corner beading News 140911

Roman Shower cubicles Shower valves Bathroom showers Roman showers News 120911

Steadmans Roof panels Wall panels Insulated panels Cladding panels News 120911

Steni Cladding panels External cladding Rainscreen cladding Facade panels News 140911

Tarkett Sports flooring Commercial flooring Vinyl flooring Floor products News 120911

Tile Depot Stone cleaner Stone sealer Tile sealer Stone tiles News 140911

TROX Chilled beams Air conditioning Fan coils Ventilation diffusers News 120911

Vent-Axia Air conditioning Ventilation systems Extractor fans Air handling News 150911

Ventrolla Sash windows Casement windows Timber windows Timber doors News 120911

Wienerberger House bricks Clay bricks Stock bricks Clay pavers News 150911

News Categories:
Flat roof insulation Cavity wall insulation Roof insulation

Arundel Jones Associates Ltd
Hill Farm Business Park, Linton Hill, Maidstone, Kent ME17 4AL
Tel : 01622 745333

news@buildingdesign.co.uk


See also:

| BuildingDesign Directory | BuildingDesign Tenders |

|BuildingDesign News Archives | 2006 | 2007 | 2008 | 2009

| BuildingDesign Recruitment | AJA Part Time Jobs Board |

© 2010 copyright all rights reserved Registered in England and Wales No. 07334149