SIG Design & Technology

SIG Design & Technology
Mannheim House
Gelders Hall Road
LE12 9NH

Tel: 01509 505 714
Fax: 01509 505475


SIG Design & Technology is part of SIG Roofing, a leading division of SIG plc, a FTSE 250 listed company and the UK’s market leading specialist supplier to professionals in the building and construction industry. We design and supply flat roofing solutions including green roofing, zinc, copper and stainless steel roofing and cladding and pitched roof coverings including natural slate and clay tiles.

We have put together an 8-step guide to identify the challenges and ensure that a roof’s design meets a building’s requirements. Called #PerfectRoof, the eight steps follow the process from product selection and design expertise through to full guarantees and planned maintenance.

Our know-how is just part of the service that is provided absolutely free to customers.

Liquid Waterproofing Systems from SIG Design & Technology
SIG Design & Technology has a comprehensive range of liquid waterproofing systems to choose from:

Hydrostop AH+
New Hydrostop AH+ has improved levels of robustness, ease-of-use and flexible pricing options available. A one component liquid waterproofing system it offers many benefits including fast curing times, low VOC content and can be applied in practically any conditions, even at low temperatures. Available in two versions, Hydrostop AH25+ and Hydrostop AH15+ use different weight reinforcement fleece and coverage rates and are available with 25 and 15-year warranties respectively. Hydrostop AH+ systems are BBA certified, certified to EN13948: 2007 for Green Roofs and fire tested to meet BS476-3 2004

SIGnature PU
Available in two formats, the SIGnature PU Liquid Waterproofing Systems offer excellent elasticity and tensile strength and can be applied all year round above 5°C. SIGnature PU-20 comprises two components which when mixed together produces a highly elastic membrane with strong adhesion to many types of surfaces. A curing agent can be added to improve drying times and also to boost mechanical properties, hardness and chemical resistance. BBA certified and guaranteed for 20 years.

SIGnature PU-10 Liquid Coating is a single component rapid curing polyurethane liquid membrane which is easy to apply over existing roofing systems to create a durable and seamless waterproof layer. BBA certified and guaranteed for 10 years.

Vulkem Quick
The Vulkem® Quick System is a crack-bridging, UV and wear resistant waterproofing system making it ideal for high-traffic areas. The different components that make up the Vulkem® Quick System cure to form a highly-elastic, foot trafficable waterproofing system which is suitable for installation on old or new concrete, tiles, metal, wood, epoxy and other types of existing deck coatings. Guaranteed for 20 years.


SIG Design & Technology operates the Design & Technology Accredited Roofing Contractor scheme (DATAC) to provide assurance that our products are installed by credible, trained, specialist roofing contractors. We offer product specific training courses in both our membrane and liquid systems and will only supply our roofing products to accredited installers.

Additional quality control is provided by our network of SIG Area Field Technicians who provide onsite support and check installations conform to product and regulatory requirements. SIG is able to guarantee the roofing installations of its DATAC installers, providing end users with peace of mind and a single point of contact. Only DATAC contractors can install roofing systems that have been
designed, supplied and guaranteed by SIG.

Why SIG Design & Technology?

• Complete and impartial design and supply service for full roofing package
• Extensive portfolio of quality membrane, liquid and metal roofing systems
• Bespoke technical support documentation for projects
• PI Insured, independent advice removes clashes between manufacturers
• Central distribution hub with next day delivery via SIG network
• National network of accredited and supported roofing contractors