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The roofing & loft conversion specialists covering all of central London and the Home Counties

Roofing and construction specialists

GWS is a family run business with over 30 years' of extensive knowledge and experience in the roofing and building profession. We cover all of London including Central London and the Home Counties, from a slipped tile to a new roof or a quality loft conversion. We pride ourselves on the high quality service and advice we offer, which is why most of our work comes through recommendation.

The Company is a proud member of the National Federation of Roofing. The Intelligent Membrane association and CHAS, all of whom have strict vetting procedures before membership is allowed and allowing us to offer manufacturers' warranties of up to 20 years for all new roof work carried out.

All lead work installed by us is in compliance with British standards and conforms to the Lead association requirements. We will only ever use industry standard approved materials and our experienced staff will ensure that you're delighted with the work they do.

We are one of the most well established roofing companies working in Central London. We have a professional and highly skilled work force that carry out all aspects of roofing and loft installations to exacting standards and requirements. As members of Competent Roofer, we take care of building notice free of charge for you.

We're so confident of the quality of the services we provide that all work and materials are guaranteed. We want to give you peace of mind that your home and property is protected for years to come.

Why choose us?

Quality assurance

Who we are



Total quality assurance

•  Member of the National Federation of Roofing Contractors (NFRC), IMA, CHAS and Competent Roofer.

•  Free estimates / Fully Insured employers & Public liability

•  Registered Insurance back guarantees

•  Loft conversions / Velux / Skylights / Roof carpentry / Decking

•  New roofs / Repairs / Slating / Tiling / Lead / Copper / Green Roofs

•  Felt / Asphalt / Guttering / Chimneys / Flat roofing / Scaffolding

tiled slate roof tiled slate roof and chimney stacks sky lights on top of flat roof NFRC logo competent roofer logo approved contractor and chas logos NFRC logo lead work on top of roof TrustMark 003 Untitled-3 copy