What Hambleside Danelaw does

Hambleside Danelaw Limited is a UK-based specialist manufacturer of glass reinforced polymer (GRP) roofing products, founded in 1976 after acquiring a patent for an innovative GRP roofing system. Operating from a single facility in Daventry, Northamptonshire, the company runs three integrated product divisions: Danelaw Pitched Roofing (dry verge systems, dry ridge/hip systems, valley troughs, tile vents and other ancillaries), Zenon GRP Rooflights (Zenon Pro, Zenon Evolution and Zenon Arc configurations including barrel vault systems), and Dryseal Flat Roofing (a GRP membrane system backed by a 20-year leak-free guarantee). The company is privately held, employs 51-100 staff, and sells exclusively into the United Kingdom and Ireland.

Core technology centres on thermosetting GRP — polyester resin combined with glass rovings — applied in profiled rooflight panels and dry-fix roofing ancillaries, with surface protection via UV-cured film and a patented cellulose acetate honeycomb insulator core (Zenon Insulator) delivering an embodied-carbon footprint of 0.28 kg CO₂/m² versus 5.1 kg for comparable polycarbonate. Multiple patents protect flagship products (InVerg GB 2586153; pending VentRidg GB 2417868.3 and SwiftRidg 2308115.1). Production operates on renewable energy at the Daventry site, which holds BS EN ISO 9001 and Carbon Reduce ISO 14064-1 certification, with 40 years of BBA certification since 1984 and CE/UKCA marking to BS EN 1013 / BS EN 14963.

The business model is one-time product sale ex-works Daventry, distributed through three channels: a trained Dryseal Approved Contractor network that can issue the 20-year guarantee; a UK and Irish merchant/stockist network supplemented by e-commerce via Roofing Superstore; and direct engagement with contractors and specifiers on large industrial projects. Commercial customers include manufacturing, logistics, agricultural and heritage buildings, alongside residential pitched-roofing applications. Specification is driven through NBS Source listing, RIBA-approved CPD seminars, and a content-led website with technical calculators and case-study library. Pricing is not publicly disclosed and is offered via quotation.

Name

Hambleside Danelaw

Legal name

Hambleside Danelaw Limited

Website

https://hambleside-danelaw.co.uk

Company type

Private

Founded year

1976

Operating status

Operating

Headcount range

51–100 employees

Short description

Hambleside Danelaw is a UK-based specialist manufacturer founded in 1976 producing GRP pitched roofing ancillaries, flat roofing systems, and industrial rooflights from its Daventry facility. It sells through approved contractors, roofing merchants, and direct specification channels across the UK and Ireland.

Ownership category

akta.pro rank

Product category

Roofing Products Manufacturing

NAICS

Asphalt Shingle and Coating Materials Manufacturing (324122)

SIC

Asphalt Paving & Roofing Materials (2950)

akta.pro primary industry

Roofing Systems & Waterproofing (Membranes, Shingles, TPO/EPDM, Liquid-Applied) (IMAFAMAA)

Keywords

• Glass reinforced polymer roofing
• Flat roofing systems
• Dry fix roofing ancillaries
• GRP rooflights
• Pitched roofing accessories

Headquarters

HQ city

Daventry

HQ country

United Kingdom

HQ region

Europe

Offices1 record

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

Supply Chain, Personnel, Operations, Technology or R&D, Marketing or Sales, Infrastructure

Revenue model

1. GRP Rooflight Sales (Zenon range): Manufacture and sale of Zenon GRP rooflights (Zenon Pro, Zenon Evolution, Zenon Arc barrel vaults) as site-assembled, composite panel, or factory-assembled insulated configurations. Revenue is generated through one-time product sales to approved contractors, roofing merchants, and directly to large commercial/industrial end-users. Products are sold ex-works Daventry. Thermal insulation upgrades (polycarbonate or Zenon Insulator) are available as add-on options within the same product family.
2. Dryseal Flat Roofing System: Sale of the Dryseal GRP flat roofing system through a network of Approved Contractors. The system is sold to contractors who then install it, backed by a 20-year leak-free guarantee issued by Hambleside Danelaw. Products include pre-cured GRP sheets, top coat finishes, and associated components. Revenue is one-time per project.
3. Pitched Roofing Ancillary Products: Manufacture and sale of dry fix roofing ancillaries for pitched roofs: dry verge systems (InVerg, IDV), dry ridge/hip systems (CON6+, SwiftRidg, SwiftRidg+, VentRidg), valley troughs, hip trays, continuous soakers, tile/slate vents, and underlay. Sold through merchant/stockist network (e.g., Watts Roofing Supplies, Brian Gow Roofing Supplies, Roofing Superstore) and directly to approved contractors. One-time product revenue.

Pricing tiers

Go-to-market motion2 records

Distribution channels4 records

Marketing channels5 records

Core offering

Hambleside Danelaw manufactures glass reinforced polymer (GRP) roofing products at its Daventry facility, organised across three divisions: Danelaw Pitched Roofing (dry verge, dry ridge and hip systems, valley troughs, tile and slate vents, continuous soakers), Zenon GRP Rooflights (site-assembled, composite panel, and factory-assembled barrel vault rooflights for natural daylighting in industrial and commercial buildings), and Dryseal Flat Roofing (a GRP-based flat roofing membrane sold through an approved contractor network with a 20-year leak-free guarantee). Products are sold ex-works to contractors, merchants, and direct commercial customers across the UK and Ireland.

Product overview

Hambleside Danelaw is a UK manufacturer of glass reinforced polymer (GRP) building products for the roofing industry, founded in 1976. The company's product portfolio consists of three main product lines: Danelaw Pitched Roofing (dry verge systems, dry fix ridge/hip systems, tile/slate vents, valley troughs, and related ancillaries), Zenon GRP Rooflights (site-assembled, composite panel, and barrel vault rooflights in Zenon Pro, Zenon Evolution, and Zenon Arc variants), and Dryseal Flat Roofing (GRP-based flat roofing membrane with 20-year guarantee). Products are manufactured at the company's facility in Daventry, Northamptonshire, with a focus on low carbon and sustainable solutions.

Differentiator

Problem solved

Functional benefit

Brands

• Danelaw Pitched Roofing: Dry fix ridge and hip systems, dry verge systems, valley troughs, tile and slate vents, and other roofing ancillaries for pitched roofs.
• Zenon Rooflights
• Dryseal Flat Roofing
• InVerg
• SwiftRidg
• SwiftRidg+
• VentRidg
• CON6+
• IDV Interlocking Dry Verge System
• Zenon Pro
• Zenon Evolution
• Zenon Arc

Products and services

• Zenon Pro GRP Rooflights Traditionally reinforced Glass Reinforced Polymer rooflights profiled to match metal or fibre cement cladding systems. Available in hundreds of profiles for new builds and refurbishments, CE and UKCA marked, supplied in single, double or triple skin configurations for industrial, commercial and agricultural buildings.
• Zenon Evolution GRP Rooflights High-strength GRP rooflight with low embodied carbon, manufactured using continuous strands of woven glass filaments for higher tensile strength and tear resistance with reduced resin. Exceeds industry non-fragility requirements and is suited to industrial and commercial applications prioritising sustainability credentials.
• Zenon Arc Barrel Vault Rooflights Factory-assembled barrel vault rooflight system for continuous runs in flat, low pitched, curved and standing seam roofing. Available in double or triple skin configurations with 1000mm and 1200mm opening widths, manufactured using Zenon Pro or Zenon Evolution materials with the patented Insulator system. UKCA and CE marked to BS EN 14963.
• Zenon Site-Assembled and Composite Panel Rooflights BBA certified rooflights UKCA and CE marked in accordance with BS EN 1013, manufactured to match metal or fibre cement profiles and tested for non-fragility per ACR[M]001. Available in site-assembled and composite panel configurations for industrial and commercial buildings.
• Dryseal Flat Roofing System Complete GRP-based flat roofing membrane system with a 20-year leak-free guarantee, sold exclusively through a network of trained and certified Dryseal Approved Contractors. Includes pre-cured GRP sheets, top coat finishes and associated components, suitable for green roof installations, new builds and refurbishments across domestic, commercial and heritage applications.
• InVerg Plain Tile Interlocking Dry Verge System Patented interlocking dry verge system for plain tile roofs that prevents weather ingress without relying on mortar. Compatible with most machine-made single and double cambered concrete and clay plain tiles, GB Patent No. 2586153, with a 15-year service life guarantee and improved wind and weather resistance.
• IDV Interlocking Dry Verge System Dry verge system for single lap concrete tiles with a market-leading 355mm maximum batten gauge. Clip-over design enables simple installation, UV stabilised units and colours, and complies with BS 8612 for wind zones 1 to 5.
• CON6+ Dry Fix Ridge and Hip System Ventilated dry ridge and hip system providing full mechanical fixing compliant with BS 5534, BS 5250 and BS 8612. Features a patented gasket with weatherproof continuous integrated water channels and a self-sealing detail for 100mm stainless steel fixing screws that removes the need for additional sealing washers.
• SwiftRidg and SwiftRidg+ Roll Top Ridge and Hip System GRP roll top ridge and hip system providing an alternative to lead, zinc, copper and galvanised steel systems, with a UV-protected GRP ridge/hip roll profile and a unique concealed omega fixing bracket. SwiftRidg+ offers a ventilated option. BRE tested to resist wind speeds exceeding 110mph, with minimum 7,500mm² airflow per linear metre and a 20-year guarantee.
• VentRidg System Universal ventilating GRP ridge tray system providing high-level roof ventilation alongside traditional mortar-bedded ridge tile appearance. Complies with BS 5534, BS 5250 and BS 8612, with integrated ventilation and mortar bonding strips. Patent Application No. GB 2417868.3.
• Continuous Verge for Slate Roofs GRP-based continuous verge system providing permanent weather protection for slate roof verges. Offers up to half the cost and installation time of traditional lead, with a 30-year service life guarantee.
• HD TV10/9 Double Plain Tile Vent Flush fitting tile vent designed to replace two plain clay or concrete tiles. Provides 6100mm² ventilation airflow area, suitable for concrete and plain tiles at a 35° minimum pitch, with a 20-year guarantee.
• Standard Open Valley Trough for Tile Roofs Pre-formed GRP valley troughs for traditional open valley drainage on tile roofs, codes HDL 401 and HDL 402. Lightweight and cost-effective alternative to lead with greater water capacity.
• Dry Fix Valley Trough for Profiled Tile Roofs Market-leading GRP mortarless dry fix valley troughs providing hidden water gulleys on profiled tile roofs. Lead alternative creating a close-cut appearance, codes HDL DVT/1 and HDL DVT/2.

Quantifiable outcome

• 66% light transmission delivered by Zenon Arc barrel vault rooflights in Industrial Unit Preston project
• +4 more outcomes

Named customers11 records

Segments4 records

Ideal customer profiles4 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature9 records

Partnerships

Twelve partnerships are on record, tiered core and supporting.

• Watts Roofing SuppliescoreChannel Partner/ Reseller/ Distributor · 1 January 2010Founded in 2010, Watts Roofing Supplies operates branches in Hertfordshire and Cambridgeshire. They supply both Pitched and Flat Roofing products, insulation, cladding and commercial sheeting. Watts Roofing has championed Hambleside Danelaw products for many years based on quality and continuous innovation, supplying CON6+ Dry Fix Ridge and Hip System and other pitched roofing products to contractors including P.A. Leaford.
• Brian Gow Roofing SuppliescoreChannel Partner/ Reseller/ DistributorUK stockist of Hambleside Danelaw products including VentRidg system. They describe Hambleside Danelaw as 'great value in a market that is already very competitive' with a 'very helpful and knowledgeable' technical team, and note GRP components are 'better and higher quality than other manufacturers'.
• Roofing SuperstorecoreChannel Partner/ Reseller/ DistributorOnline roofing merchant platform serving both trade professionals and DIY consumers. Has been stocking Hambleside Danelaw products for approximately 15 years since founding, providing high quality roofing solutions. Stocks InVerg interlocking dry verge system among other products.
• Pro Port CanopiescoreChannel Partner/ Reseller/ DistributorEstablished design and installation company for exterior shelters, carports and canopies based in Staffordshire. Family-run business trading for over 20 years with multiple accreditations including ISO 9001:2015, ISO 14001:2015, CHAS, Constructionline Silver, and NHBC SAFEMARK. Long-term supplier relationship with Hambleside Danelaw for Zenon GRP products used in canopy installations such as Westfield Cricket Club's 150th anniversary canopy.
• National Federation of Roofing Contractors (NFRC)supportingOthersIndustry trade body affiliation. Hambleside Danelaw collaborates and contributes to industry standards, technical guidance, and best practice through NFRC membership.
• Rooflight Association (RA)supportingOthersNational association of rooflight manufacturers. Hambleside Danelaw is a member and passionate advocate of natural daylight in the working environment. Contributes to industry standards and technical guidance on rooflight non-fragility classifications.
• Achilles (Carbon Reduce Programme)supportingOthersHambleside Danelaw works with Achilles for Carbon Reduce ISO 14064-1 certification. Achilles conducted in-depth analysis and audit of the company's carbon footprint, and Hambleside Danelaw has reduced net emissions for three consecutive years.
• MCRMA (Metal Cladding and Roofing Manufacturers Association)supportingOthersSector-specific industry association. Hambleside Danelaw is an affiliated member, evidencing commitment to quality, innovation, and sustainable practices in the roofing and cladding sector.
• British Standards Institution (BSI)supportingOthersHambleside Danelaw's GRP production facility holds BS EN ISO 9001 quality certification through BSI. BSI also listed as affiliation/partner.
• NBS SourcesupportingTechnology or IntegrationListed on NBS Source platform, enabling architects and building specifiers to incorporate Hambleside Danelaw products into building specifications.
• Dcarbon8 / RPS GroupsupportingOthersIndependent verification of embodied carbon data. All Hambleside Danelaw embodied carbon data has been independently verified by Dcarbon8 and RPS Group.
• Euroclad Group / Tata Steel ColorcoatsupportingGTM or Marketing PartnerHambleside Danelaw partnered with Euroclad Group and Tata Steel Colorcoat to host the 'Constructing a Sustainable Future: Industrial & Logistics Buildings Roadshow' at Silverstone Race Circuit in November 2023.

Scale indicators7 records

Recent moves6 records

Expansion highlights6 records

Direct peers

• Cure It GRP Roofing: UK-based GRP flat roofing system manufacturer and supplier with an Approved Contractor training network. Closely comparable to Hambleside Danelaw's Dryseal in business model, material technology, and channel structure.
• Xtralite (Rooflights): UK rooflight manufacturer offering GRP and polycarbonate rooflight systems for industrial and commercial buildings. Directly comparable to Zenon Pro, Zenon Evolution, and Zenon Arc product lines.
• Topseal Systems: UK manufacturer of GRP flat roofing systems sold through an approved installer network with a 20+ year guarantee. Direct competitor to Dryseal in residential and small commercial GRP flat roofing.
• Bauder Ltd: UK's largest independent flat roofing manufacturer offering single-ply, bitumen, and hot-melt membrane systems. Directly competes with Hambleside Danelaw's Dryseal flat roofing product line in commercial and industrial roofing.
• Manthorpe Building Products: UK manufacturer of pitched roofing ancillaries including dry verge, dry ridge, tile vents, and underlays. Direct competitor in the same merchant-channel categories as Danelaw Pitched Roofing.
• Brett Martin Daylight Systems: UK-based manufacturer of rooflights and daylight systems for industrial, commercial, and residential buildings. Directly competes with Hambleside Danelaw's Zenon range across both GRP and polycarbonate rooflight categories.
• Klober Ltd: European pitched roofing accessories manufacturer with UK presence, offering dry verge, dry ridge/hip, valley, and ventilation products. Directly competes with the Danelaw Pitched Roofing portfolio (InVerg, CON6+, IDV, VentRidg).

Broad incumbents

• Sika UK: Global construction chemicals and roofing systems manufacturer with strong UK presence in flat roofing membranes (Sarnafil) and waterproofing. Larger incumbent offering competing flat roofing solutions to Dryseal, alongside broader product portfolio.
• IKO plc: UK manufacturer of bituminous roofing membranes and flat roofing systems. Competes with Dryseal in flat roofing and also offers pitched roofing accessories, making it a broad incumbent in the same end markets.
• Kingspan Light + Air (formerly Kingspan Benchmark): Division of Kingspan Group manufacturing rooflights, smoke vents, and ventilation systems for industrial and commercial buildings. Larger incumbent competitor to Zenon GRP rooflights with broader product portfolio and international footprint.

Market position

Weaknesses4 records

Competitive moat5 records

Key risks5 records

Key highlights7 records

Customer concentration

• Xx.com/hambdane
• Facebookfacebook.com/hamblesidedanelaw
• LinkedInlinkedin.com/company/hambleside-danelaw

Compliance6 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles8 records

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Hambleside Danelaw