Waterproofing Systems

Siltec Limited are specialist providers of high quality roofing, waterproofing, insulation and associated products.

Our systems

We provide complete flat roof and waterproofing solutions for both new build and refurbishments.

Our extensive product range is from some of the most advanced manufacturing facilities in our field and our materials/systems have been rigorously tested and certified by many recognised bodies.

Siltec provide waterproofing solutions for:

Single Ply

20 & 25 Year warranty with additional insurance backing

The Siltec range of single ply PVC waterproofing membranes are at the forefront of today’s synthetic production methods.


Up to 30 Year warranty with additional insurance backing

The Siltec range of bituminous membranes offers exceptional quality of manufacture and proven reliability.

Structural Hot Melt

Up to 35 Year warranty with additional insurance backing

The Durabond hot melt structural waterproofing system is designed to last the lifetime of the structure to which it is applied.

Silflex Liquid

20 & 25 Year warranty with additional insurance backing

Silflex liquid waterproofing systems can be installed in cold, warm and inverted roof formats.


Thermal Insulation/Associated Components

Siltec offer a wide range of thermal insulation, suitable for all of the waterproofing disciplines available.

Green Roofs

Intensive, Extensive and Biodiverse

Siltec green roof systems have been developed in association with our specialist horticultural partners in harmony with our waterproofing systems.

Photovoltaics (PV) Systems

Photovoltaic solar energy is a clean

Solar panel surface

Newly built dwellings in the UK must now gain a ‘pass’ on their SAP calculations in order to meet current building regulations.

Access and Fall Prevention

Siltec can assist you

Engineer on rooftop stand next to solar panels wear safety gear wear hand gloves ready to work

Regular inspection and maintenance of flat roofs is not just good practice, it is also a condition of the waterproofing system warranty.

Specialist Trade Supplies

Open 7.30am – 5pm Monday to Friday

Company brochure

Our trade counter offers a complete one stop shop for flat roofing materials.

Siltec is a British limited company. Our senior staff have a combined experience of over 100 years in the flat roofing and waterproofing Industry.

Our ultimate goal is your satisfaction. We prioritise open communication, listen to your concerns, and work closely with you to ensure that our solutions align with your vision. We are not satisfied until you are delighted with the results.

What our customers say about us

Our team comprises experienced roofing specialists who have in-depth knowledge of flat roofing waterproofing solutions. We stay updated with the latest industry trends and techniques to ensure we offer the best solutions.


Getting Started with Our Waterproofing Solutions

Take a look at some of the common questions we get asked by our customers here at Siltec.

Siltec Technical Statement - Standard Roof Falls to Achieve Drainage and Ponding Rainwater

Siltec Technical Statement - Standard Roof Falls to Achieve Drainage and Ponding Rainwater

Siltec Technical Statement - Moisture Content in a Concrete Substate - Feb 2023

Siltec Technical Statement - Silflex Winter Advice - Dec 2022

Siltec Technical Statement - What Signifies a Level Deck...

Siltec Technical Statement - The Use of Additional Plywood or OSB in Warm Roof Deck Design

Siltec Technical Statement - Non-Standard Details and SILTEC Warranty Cover

Flat roofs constructions, including the deck, are subject to external fire spread. When a flat roof construction is tested for its external fire performance (penetration through the roof construction and surface spread of flame), it is classified within the European system as highest BRoof(t4) through to lowest FROOF(t4).

Not all flat roofs can be classified, such as existing roofs. Some do not need to be classified due to their inherent ability to stop external fire spread, such as gravel and paving slab finished inverted roofs and protected roofs, so use is unrestricted.

With tested roofs however, Siltec are proud to have an extensive range of tested systems that can provide the highest BROOF(t4) performance classification for potentially hundreds of flat roof permutations that include single ply, liquid, hot melt, and bituminous waterproofing. This provides our clients with a full range of solutions whilst still complying with HM Government Building Regulations.

Get In Touch

Siltec offer everything a client needs. From initial advice and specification, access to our approved contractor network, design assistance and on site progress reports.