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SBL enforces the following quality policy to enable to supply and fitting of the highest quality of works. It is essential that customer satisfaction and requirements are met and we continue to log, monitor and aim to uphold and improve our quality promise.

We are committed to achieving and maintain these key objectives in order to retain and improve on our high quality of works and services. We concentrate on maintaining a commitment to the customer/clients specific requirements, we monitor this by recording customer/client satisfaction in order to constantly assess and improve on the services/works we provide by ensuring we improve the performance of our workforce and quality of work enabling a continuously high standard of works.

Trade Associations
checkatrade Click to view website

Checkatrade runs strict background checks on tradespeople before they can become members. Once they join, members agree to have feedback from their customers put online for all to see. We’ve published 2,572,732 to date. Members promise to meet The Checkatrade Standard.

No other directory of tradespeople uses this model. The background checks and public feedback ensure that only reliable and trusted tradespeople get work through Checkatrade. They make sure that you can find someone outstanding to get the job done.


FENSA stands for the Fenestration Self-Assessment Scheme. Following Government encouragement, FENSA has been set up by the Glass and Glazing Federation (GGF) and other industry bodies in response to Building Regulations for double glazing companies in England and Wales.

When replacing windows, doors and roof lights in dwellings in England and Wales, homeowners must comply with current thermal performance and Building Regulation standards and ensure they get a certificate from a Competent Person scheme such as FENSA or Local Authority Building Control. FENSA enables companies that install replacement windows and doors to self-certify compliance under these Building Regulations without the need for a separate assessment from Building Control.

fensa Click to view website
FMB-2 Click to view website
Federation of Master Builders

Before becoming a Master Builder members must meet our strict membership criteria as well as passing our vetting process.

As well as signing up to a Code of Practice members must confirm their trading address and VAT registration details (if applicable). We also check their employers (if applicable) and public liability insurance, verify that they have no un-discharged bankruptcies or relevant and outstanding County Court Judgements and perform credit, public record and director checks – all of which they must pass before being accepted in to membership.

Since 2011, all of our members have passed an independent inspection before joining and from 2015 all members will be inspected every 3 years. Member inspections are carried out by an inspector from the British Board of Agrément, an independent non-profit distributing organisation accredited by the United Kingdom Accreditation Service.

Gas Safe Register

The main focus of the Register is on improving and maintaining gas safety to the highest standards. We make sure all gas engineers on the Register, over 120,000, are qualified to work with gas.

We work to protect the public from unsafe gas work through:

  • a national investigations team tracking down illegal gas workers
  • regular inspections of Gas Safe registered engineers
  • educating consumers and raising awareness of gas safety
  • investigating reports of unsafe gas work
gas safe Click to view website
glaziers Click to view website
National Federation of Glaziers

National Federation of Glaziers was founded in 1991 to promote best and fair practice in the Glazing industry and is a Trade and Consumer Federation.

Its members are thoroughly vetted before acceptance and may be relied upon to provide proper and professional advice on all aspects of glazing, and to carry out glazing work to the highest standards.


The Domestic Installer Scheme helps installers comply with Part P.

Part P of the Building Regulations establishes electrical installation safety standards for domestic properties.

This scheme is designed for contractors solely looking to register domestic installation work in accordance with the Building Regulations. The scheme covers low or extra low voltage work including:

  • Design
  • Installation
  • Certification
NICEIC logo Click to view website
trustmark logo Click to view website

TrustMark is the nationwide Government-backed scheme to help consumers find reputable tradesmen to carry out work inside and outside their home.

The National Federation of Roofing Contractors Limited is an approved scheme operator for TrustMark and together with the Government and other key bodies are working together to stamp out rogue traders in the roofing industry.

Home Improvement Protection

Home Insurance Protection is there to protect you and your guarantee providing deposit protection certificaion and an insurance back guarantee, providing full protection to the consumer.

hip Click to view website
Team_Guardian_Approved Click to view website
Team Guardian

Team Guardian  has been created to provide home owners, wherever they live in the UK with quality assurances and peace of mind.

Only Team Guardian installers are authorised and approved to sell and fit the Warm Roof system, therefore we strongly recommend that you check to make sure that the company you appoint are Team Guardian members.

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