Commercial roofing accreditations and standards
We want to be exact about accreditation, because the roofing trade is full of firms displaying scheme logos they are not entitled to — and a claimed accreditation is one of the things that quietly makes one quote look better than another without being verifiable. So here is the honest position for this commercial roofing service: the accreditations below are what the installer network holds and the standards the work is carried out to. This operating business does not claim to be a member of these schemes itself. What we do is connect you with accredited, manufacturer-approved installers, and specify the work to the codes that govern each roof system. That distinction is not a technicality; it is the difference between a verifiable claim and a misleading one.
What the installer network holds
NFRC (National Federation of Roofing Contractors). We connect you with NFRC-accredited installers. NFRC is the UK's principal roofing trade body, and its members are vetted on competence, financial standing and workmanship. Accredited membership is also the route through which insurance-backed guarantees are commonly available on qualifying systems.
CompetentRoofer (the NFRC Competent Person Scheme). Where your installer is CompetentRoofer-registered, they can self-certify a re-roof against the Building Regulations and issue a Building Regulations Compliance Certificate, instead of a separate Local Authority Building Control application. That certificate is the document you will need at a sale, a lease event or an insurance review. Registration is the installer's capability, held by the contractor doing the work, which is exactly why we frame it that way rather than claiming it as our own.
SPRA (Single Ply Roofing Association). Single-ply work is carried out to SPRA-referenced specifications. SPRA sets the technical guidance for single-ply membrane design, fixing and detailing, the standards behind our single-ply flat roofing work.
LRWA (Liquid Roofing and Waterproofing Association). Liquid-applied and GRP work is carried out to LRWA-referenced specifications, covering substrate preparation, adhesion testing and detailing, the standards behind our liquid coatings and cut-edge and gutter lining work.
CHAS and SafeContractor. Installers are prequalified through recognised health-and-safety assessment schemes such as CHAS, SafeContractor and Constructionline. These confirm that a contractor's safety management, insurances and competence have been independently assessed before they set foot on your roof, which matters on occupied buildings with operations continuing below.
The standards the work is done to
Accreditation confirms competence; standards define the work itself. Every specification is worked to:
- BS 6229:2025, the code of practice for flat roofs, which sets a minimum finished fall of 1:80 with the design fall derived from structural analysis or a level survey.
- Building Regulations Approved Document L, the Part L thermal-element upgrade triggered on a significant re-roof, typically to around 0.18 W/m²K.
- Building Regulations Approved Document B and Broof(t4) to BS EN 13501-5, the external fire performance required near boundaries and compartment-wall junctions.
- BS EN 1991-1-4, the wind-uplift calculation that sets the fixing pattern and perimeter and corner zones.
- BS 8217, the code of practice for reinforced bitumen membranes.
- BS 5534, the slating and tiling code of practice governing fixing and wind resistance on pitched slate, tile and metal roofs.
- BS EN 12056-3, the design basis for rainwater gutter and outlet capacity on commercial roofs.
- Manufacturer-approved installation, which is what unlocks single-point and insurer-backed system guarantees, and BBA-certified systems where specified.
Why this framing protects you
There is a reason we are careful here. A contractor who implies accreditations they do not hold is a contractor you cannot trust on the harder claims, the falls design, the wind-uplift calculation, the guarantee that survives them going out of business. By being straight about what the network holds and what the work is done to, you can verify every claim independently: check the installer's NFRC and CompetentRoofer registration directly, ask for the SPRA or LRWA specification, and confirm the manufacturer approval that backs the guarantee. The how it works page shows where each of these lands in the project, from survey to Building Regulations Compliance Certificate.
That is the whole basis of this commercial roofing service: accredited installers, standards you can name, and a paper trail you can keep. To have the right accreditations and standards set against your roof in a written specification, request a quote.