When it comes to roofing and glazing work, it is commonplace to see the widest gap between a supplier’s assertions and the regulatory realities. Conservatory roof replacements that involve the Building Regulations are marketed as simple upgrades. Flat roof membranes are quoted with 20-year warranties from contractors who might not even be around in 5 years. Window energy ratings are shown, with no commentary on what the scale measures. The articles in this section attempt to address that. The focus throughout is on certification, standards, and contractor credentials – what each mark means, what Building Regulations apply and what to ask before any contractor touches your roof or window frames. The applicable standards and schemes for roofing and glazing The standards and schemes that apply to roofing and glazing work are the ones that offer quality assurance, and regulatory compliance, to the consumer. The raw data and the summary are as follows: Standard/Scheme What it Covers Certification/Verified by BS EN 13956 European Standard for Flexible Waterproofing Sheets, which includes GRP, EPDM and TPO membranes. Covers testing for each: tensile strength, elongation, tear resistance, and thermal cycling. Independent test bodies. Ask for the test report number, not just the product name. BFRC energy rating (A++ to E) British Fenestration Rating Council – window energy ratings which consider solar gain, U-value, and air leakage. Part L of the Building Regulations requires a minimum of Band C for replacement windows. BFRC register at bfrc.org.

Please check the product and its ratings before purchasing. FENSA and Certass provide competent person schemes for the installation of windows and doors. Registered installers are able to self-certify adherence to the Building Regulations without needing an accredited inspector. FENSA can be accessed at fensa.org.uk. Certass can be accessed at certass.co.uk. Part L (Building Regulations) relates to the energy efficiency of new and replacement roofing and glazing. Replacement windows must be at least Band C. New extending roofs must have a U-value of 0.15 W/m²K or better. This will be assessed by Local Building Control or an Approved Inspector. Part A (Building Regulations) relates to the Structural loading requirements. This comes into play when replacing a lightweight glazed conservatory roof with a heavier solid roof. This will require a structural engineer’s assessment and building control sign off. Membership of the NFRC (National Federation of Roofing Contractors) requires proof of employer’s liability and public liability insurance, along with client references and proof of technical competence. You can use the NFRC contractor search at nfrc.co.uk. The Competent Roofer scheme is a government- authorized scheme that allows registered roofing contractors to self-certify their work as compliant with the Building Regulations. This is managed through the NFRC. All these standards apply to various elements of the same work.

The replacement of a conservatory roof includes considerations of Part L regarding thermal performance, Part A regarding structural loading, and possible FENSA or building control sign-off on the installation — none of which cover the other parts. The distinction contractors make is rarely clear The way roofing and glazing work gets sold in the UK is repetitive: there is a pattern where contractors conflate the rules governing permitted development with the separate regulations on Building Code Compliance, or where reference to the latter is made as an afterthought after the work order is signed. They are separate systems. A development can be classified as permitted development — which means it does not require planning permission — and still be subject to Building Code Compliance. A common case is when a conservatory’s glass roof is replaced with a solid tiled roof. From a planning perspective it might be simple. However, there are complex Building Code Compliance issues, which the homeowner, not the contractor, is liable for when the non-compliance is uncovered at the time of sale. Articles in this section Flat roof membranes compared — GRP, EPDM and TPO against BS EN 13956

In most cases, converting a polycarbonate or glass conservatory roof to a solid tiled roof means the conservatory loses its exemption from Building Regulations. This article discusses when the regulations kick in, what Part L requires of the new roof’s thermal performance, the structural loading issue most buyers overlook, and what to ask a contractor to confirm in writing before work begins. How to check a roofing contractor’s credentials — NFRC membership, insurance, and warranty requirements

NFRC membership includes reviewed insurance, client references, and proven skills. This article explains what the membership requires from a contractor, how to check the membership, and what a manufacturer-backed flat roof warranty requires, along with the most important question to ask before any other. What the BFRC Window Energy Rating A++ to E scale means

The rating is a combination of solar gain, U value, and air leakage, which is consolidated into a single band. Building Regulations, Part L, sets Band C as the minimum for windows that are replacement.

If you are replacing more than 50% of the existing roof surface for a flat roof replacement, you need to do a Part L Assessment. If a Conservatory roof gets converted to a solid structure, this also triggers Part A and Part L. For rooflights, in conservation areas, they always require planning permission, regardless of the size. None of these are obscure and they are the typical regulatory framework for this type of work. The above articles adequately address each to ensure a contractor does not try to work outside the specification before the work begins, rather than after it is complete. All articles on this site are independent editorial. We do not receive any money for product placement or mentions of suppliers.