What Siltec Limited does

Siltec Limited is a privately held UK specialist supplier of flat roofing and waterproofing systems, headquartered in Portsmouth, Hampshire (Unit E8 Voyager Park, Portfield Road, PO3 5FL). The company supplies a proprietary portfolio of waterproofing technologies including Single Ply PVC membranes manufactured on co-extrusion production lines, Proflex Reinforced Bituminous Membranes, Durabond Structural Hot Melt (polymer-modified bitumen with synthetic rubber compounds, capable of zero-falls application down to -20°C), and the Silflex Liquid range (F1 quick-cure single-component and PMMA premium two-part, with 25-30+ year service lives). Adjacent product lines include thermal insulation, Green Roof Systems (developed with horticultural partners), Photovoltaics, Fire Safety Systems with BROOF(t4) classification, and Access and Fall Prevention Systems. Manufacturing capacity exceeds 10,000,000m² per annum for single ply membranes, and the portfolio is supported by BBA certifications and warranties of 20-35 years with additional insurance backing.

Siltec operates a multi-channel go-to-market: direct technical specification sales targeting architects, specifiers and developers (supported by CPD presentations, BIM objects, NBS specifications, roof surveys with thermal imaging, and thermal/wind-uplift/drainage calculations); an Approved Contractor Network trained in correct installation; a physical trade counter in Portsmouth selling multi-supplier materials; and an online account system for registered customers. Pricing is quote-based with insurance-backed warranty tiers. The company serves new-build and refurbishment projects across the UK, with senior staff claiming 100+ years of combined waterproofing industry experience, and its enterprise reference list includes Amazon, TK Maxx, Costa Coffee, Shell, BP, BBC, BMW, Clarks Village, Co-op, Greene King, Greggs, David Lloyd, P&O Cruises, Esso, Coca-Cola, Lucozade, AFC Bournemouth and multiple UK local councils.

The company is privately held with no parent, no disclosed investors, and no disclosed revenue or funding rounds. Day-to-day operations are led by Managing Director Jay Smith, Technical Director Martin Haines, Commercial Director Mark Oakley, Head of Sales Oliver Jackson, and Head of Finance Michela Nzenga, supported by Regional Sales, Key Account Management, Trade Counter Sales, Technical, Warehouse and Marketing functions.

Name

Siltec Limited

Legal name

Siltec Limited

Website

https://siltecuk.com

Company type

Private

Founded year

2019

Operating status

Operating

Headcount range

1–10 employees

Short description

Siltec Limited is a UK-based specialist supplier of flat roofing and waterproofing systems, serving architects, specifiers, contractors and developers nationwide with proprietary membranes, liquid waterproofing, insulation and complementary systems, supported by technical services and an approved contractor network.

Ownership category

akta.pro rank

Product category

Flat Roofing and Waterproofing Systems

NAICS

Asphalt Paving, Roofing, and Saturated Materials Manufacturing (32412), Asphalt Shingle and Coating Materials Manufacturing (324122), Roofing Contractors (238160)

SIC

Asphalt Paving & Roofing Materials (2950), Plastic Material, Synth Resin/Rubber, Cellulos (No Glass) (2820)

akta.pro primary industry

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

akta.pro secondary industries

Waterproofing Membranes & Systems (Liquid-Applied & Sheet) (IMADAOAC), Flat Roof Repair & Membrane Restoration (TPO/EPDM/PVC/Built-Up) (HSAGAKAE)

Keywords

• Flat roofing systems
• Waterproofing membranes
• Single ply roofing
• Bituminous membranes
• Green roof systems

Headquarters

HQ city

Portsmouth

HQ country

United Kingdom

HQ region

Europe

Offices1 record

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

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

Revenue model

1. Waterproofing Materials and Systems Sales: Sale of high-performance flat roofing and waterproofing systems including Single Ply PVC membranes, bituminous membranes, structural hot melt systems, liquid waterproofing, insulation and associated components. Products sourced from specialist manufacturers with extended warranties up to 35 years.
2. Technical Services: Specification writing and design assistance, roof surveys and reports, technical support from design to project handover, presentations and product training. Technical support is provided free of charge as part of service offering to support project specification.
3. Specialist Trade Supplies: Trade counter sales of flat roofing materials including torch on felts, self adhesive membranes, angle fillets, plywood/OSB boards, outlets, trims, flashings and general roofing equipment from multiple supplier brands.

Pricing tiers

Go-to-market motion3 records

Distribution channels4 records

Marketing channels5 records

Core offering

Siltec Limited supplies high-performance flat roofing and waterproofing systems to the UK construction industry. Core offerings include Single Ply PVC membranes, Proflex Reinforced Bituminous Membranes, Durabond Structural Hot Melt waterproofing, and Silflex liquid waterproofing systems (F1 and PMMA variants), complemented by thermal insulation, green roof systems, photovoltaics, fire safety solutions, and access/fall prevention systems. The company also provides technical services including specification writing, roof surveys, design assistance, and CPD training for architects and specifiers.

Product overview

Siltec Limited is a specialist supplier of flat roofing and waterproofing systems offering a comprehensive portfolio of core products including Single Ply PVC Membranes, Proflex Reinforced Bituminous Membranes, Durabond Structural Hot Melt Waterproofing, and Silflex Liquid Waterproofing (F1 and PMMA variants). These waterproofing systems are complemented by Thermal Insulation, Green Roof Systems, Photovoltaics, Access and Fall Prevention, and Fire Safety solutions. The company provides associated technical services including roof surveys, specification writing, design assistance, technical support, CPD training, and access to an approved contractor network. Siltec operates a trade counter for material supplies and offers warranties ranging from 20 to 35 years with additional insurance backing across its product range.

Differentiator

Problem solved

Functional benefit

Products and services

• Single Ply PVC Waterproofing Membranes Lightweight PVC waterproofing membranes using thermoplastic polymer technology for exposed flat, inverted, mono pitch, ballasted and green roofing systems. BBA certified with life expectancy exceeding 30 years and warranties of 20 or 25 years with insurance backing.
• Proflex Reinforced Bituminous Membranes Built-up felt bituminous membrane systems offering torch-applied and thermoadhesive solutions. BBA approved with service life exceeding 30 years, available in various weights and finishes for new-build and refurbishment projects.
• Durabond Structural Hot Melt Waterproofing Hot applied liquid roof waterproofing comprising polymer modified bitumen blended with synthetic rubber compounds. Designed for inverted roofing with zero falls capability, applicable in temperatures down to -20°C, with up to 35 year warranty. Includes Durabond Plus (two-coat with polyester reinforcement) and Durabond Rapid (single-coat with reinforcement mesh) variants.
• Silflex F1 Quick-Cure Liquid Waterproofing Rapid-curing, single-component liquid waterproofing system for flat roofs, balconies, gutters, and complex detailing. Rain-resistant within minutes, no mixing required, fully reinforced with crack-bridging capability. Service life in excess of 25 years.
• Silflex PMMA Premium Two-Part Liquid Waterproofing High-performance two-part PMMA (polymethyl methacrylate) liquid waterproofing system for demanding environments including car parks, podium decks, and balconies. Wet-on-wet application for continuous fully bonded membrane. Service life in excess of 30 years with traffic-grade protection.
• Thermal Insulation Products Wide range of thermal insulation suitable for all waterproofing disciplines including foil faced PIR, tissue faced PIR, bituminous faced PIR, mineral wool, EPS/XPS, and inverted roof insulation systems with U-values as low as 0.10 W/m²K.
• Green Roof Systems Sustainable green roof solutions developed with specialist horticultural partners, available in intensive, extensive and biodiverse formats. Compatible with Single Ply, Bituminous, Structural Hot Melt and Silflex liquid waterproofing systems.
• Photovoltaics (PV) Systems Solar photovoltaic systems for renewable energy generation on flat roofs, improving SAP calculations, BREEAM scores, and meeting building regulations for new dwellings.
• Access and Fall Prevention Systems Freestanding guardrail systems and horizontal lifeline systems for permanent edge protection and personal fall protection on flat roofs up to 10 degree pitch.
• Fire Safety Systems Fire-rated roofing solutions with BROOF(t4) classification for highest external fire performance. Includes non-combustible materials, fire-proof insulations (cellular glass, stonewool), and upstand boards.
• Specialist Trade Supplies Trade counter offering torch on felts, self adhesive membranes, angle fillets, plywood/OSB boards, outlets, trims, flashings and general roofing equipment from suppliers including SAMAC, Leister, James Latham, Fixfast, Ecobat, CT1, and Calloni SRL.
• Roof Surveys Technical roof condition surveys with photography, thermal imaging, and electronic integrity testing for moisture detection.
• Specification Writing and Design Assistance Full specification service with NBS format specifications, standard detail drawings tailored to site requirements, and multiple system variants under single responsibility.
• Technical Support Services Thermal calculations, wind uplift calculations, drainage design, and budget cost analysis from design through project handover, provided free of charge to support specification.
• CPD and Training Presentations Continuing Professional Development sessions for architects and specifiers covering flat roofing and waterproofing best practices, delivered in-person or online as 45-60 minute sessions.

Quantifiable outcome

• Service life in excess of 25-35 years depending on system
• +3 more outcomes

Named customers22 records

Segments4 records

Ideal customer profiles4 records

Technology focussed Yes

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature4 records

Partnerships

Eight partnerships are on record, tiered minor and core.

• SAMACminorOthersSupplier of specialist trade supplies for the flat roofing materials trade counter operation. Products sourced include torch on felts, self adhesive membranes, and general roofing equipment.
• LeisterminorOthersSupplier of roofing equipment and tools available through the Siltec trade counter.
• James LathamminorOthersTimber and panel products supplier providing plywood/OSB boards and related materials through the trade counter.
• FixfastminorOthersFastening solutions supplier for roofing applications available at trade counter.
• EcobatminorOthersSustainable building products supplier providing environmentally focused options for roofing projects.
• CT1minorOthersSealant and adhesive manufacturer supplying products through the trade counter for roofing applications.
• Calloni SRLminorOthersItalian manufacturer supplying specialist roofing products available through Siltec trade counter.
• Horticultural PartnerscoreStrategic or Co-development PartnerSpecialist horticultural partners collaborated with Siltec to develop green roof systems in harmony with waterproofing systems. Partnership enables development of sustainable, environmentally friendly and aesthetically pleasing green roof solutions.

Scale indicators4 records

Recent moves6 records

Expansion highlights5 records

Direct peers

• Bauder: UK-based specialist supplier of flat roofing and waterproofing systems including single ply, bituminous, hot melt and green roof solutions. Closely comparable to Siltec in product range, customer segments (architects/specifiers/contractors) and warranty-backed BBA-certified systems.
• Alumasc: UK supplier of building envelope solutions including flat roofing membranes, waterproofing, and rainwater systems. Directly comparable product portfolio and go-to-market through architectural specification, with similar warranty-backed offerings.
• Renolit: European manufacturer of PVC single ply roofing membranes (RENOLIT ALKORPLAN). Direct technology overlap with Siltec's single ply offering and similar architectural specification-led commercial model.
• Firestone Building Products: Manufacturer of EPDM and rubber-based roofing systems with strong UK presence. Comparable in single ply and membrane technology, BBA certifications and contractor-network-driven specification model.
• Polyroof: UK-based specialist in cold-applied liquid waterproofing systems for flat roofs. Directly comparable to Siltec's Silflex liquid range in product type, customer base and warranty-backed installer network model.

Broad incumbents

• IKO: Global manufacturer of bituminous membranes, single ply, liquid systems and insulation. Overlaps Siltec on bituminous and single ply roofing but operates at much greater scale with international manufacturing.
• Tremco Roofing: Manufacturer of liquid-applied and bituminous roofing systems with strong specification presence in commercial construction. Overlaps with Siltec's Silflex liquid and bituminous membrane lines.
• Carlisle Construction Materials: Manufacturer of EPDM, TPO and PVC single ply roofing systems. Comparable membrane technology and warranty structure, with broader international footprint than Siltec.
• BMI Group: One of the largest UK and European roofing manufacturers (formerly Redland, Icopal, Monarflex). Competes across bituminous, single ply, liquid and green roof systems with extensive contractor networks and warranty programmes.
• Sika Sarnafil: Single ply PVC membrane systems within Sika's broader construction chemicals portfolio. Direct overlap on single ply roofing, with global R&D, warranty programmes and technical specification support comparable to Siltec's approach.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks6 records

Key highlights7 records

Customer concentration

• Facebookfacebook.com/siltecuk
• LinkedInlinkedin.com/company/siltec-uk
• Instagraminstagram.com/siltecuk

Revenue estimate

Valuation estimate

Number of profiles

Profiles11 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 Siltec Limited