Simple. Effective. Reliable: Why choose Dryseal for your Housing Project

// the building envelope

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Dryseal is a unique, mechanically fixed GRP (fibreglass) roofing system which comes with a comprehensive range of pre-formed trims which can accommodate even the most complex detailing requirements.


Dryseal offers:

  • Crisp clean lines
  • Premium quality
  • Proven weather-tight detailing
  • Robustness
  • Durability
  • Thermal reliability
  • Assurance


Dryseal is dependable with 20 year insurance backed extendable guarantee; excellent puncture resistance and BBA Agrément ‘zero falls’ accreditation. The system is manufactured entirely in the UK by Hambleside Danelaw Ltd, a Green Apple Award-winning manufacturer and is fitted by a fully trained Approved Contractor network.

Environmentally conscientious

Dryseal has the lowest embodied carbon than all its competitors. The premium roofing solution is fully recyclable and is non-pollutant once installed. GRP (Glass Reinforced Polyester) is an inert material that can be used with ‘grey’ water harvesting systems and potable water. In service, it does not release any pollutants or chemicals making it an ideal membrane for a green roof. Dryseal Approved Contractors can install ECO and Green Deal measures via Competent Roofer and PAS 2030 certification.

Premium Design

Secured by Design recommend Dryseal as an alternative to sheet metals as it has no scrap value and acts as a deterrent to thieves. Additionally, Dryseal attracts a BREEAM point via Secured by Design.

With a 20 year insured guarantee that can be extended by refurbishing the top-coat, the Agrément certified Dryseal system can have its life extended almost indefinitely and continues to grow in popularity with specifiers.

Case Study

Hull City Council’s Housing Department was considering several waterproofing systems for covering roofs on a potential scheme to upgrade post-war Wimpey ‘no fines’ concrete houses. Dryseal, due to its aesthetics, excellent detailing capabilities and tough, durable finish, was deemed to fit the bill.

In 2013, Dryseal Approved Contractor L A Hall (Hull) Ltd were contracted to fit Dryseal on one roof. By late 2014, the team were re-roofing of 61 main house roofs. As the project progressed into 2015, the brief was extended to include porch/canopy ‘warm’ roofs, effectively doubling the roof area.

Andy Fell Hambleside Danelaw’s Dryseal Manager said “The standard of installation and finishing delivered by L A Hall’s operatives has been exceptional, resulting in very robust and aesthetically pleasing roofs.”

The development of the specification from one 20 m2 roof to over 200 roofs totalling 1,800 m2 is testament to Dryseal’s quality.

Hambleside Danelaw Ltd offers a RIBA ‘core curriculum’ seminar analysing Glass Reinforced Polyester (GRP) and its use in flat roofing. The seminar covers the invention, history and development of GRP, the basic process of manufacture and applications as a roofing material. It looks at the impressive environmental performance of GRP as well as the benefits of GRP within the building industry. The CPD guides architects through the production of GRP, and how a component based system is fitted and compares this to typical ‘wet-lay’ GRP roofing systems.

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