Glazing Accreditations & Insurance Cover | Window Fitters Ltd

Company Compliance, Insurance & Trade Certificates

At Window Fitters Ltd, we hold ourselves to the highest standards of safety, quality, and regulatory compliance. Every installation is backed by robust insurance and strictly adheres to UK Building Regulations.

Expert Reviewed by Marian Gheorghe, Head Window Fitter - Last reviewed: July 2026

Key Compliance & Certification Standards

1. UK Building Regulations Compliance

All of our window and door installations are designed to fully comply with the latest UK building codes:

• Document L (Conservation of Fuel & Power): We install double and triple-glazed units that meet or exceed thermal insulation requirements (U-values of 1.4 W/m²K or lower for windows, and 1.4 W/m²K or lower for doors).
• Document K (Protection from Falling, Collision & Impact): We strictly use toughened safety glass in critical locations, such as all doors, adjacent side panels, and windows situated below 800mm from the finished floor level.
• Document F (Ventilation): We ensure adequate ventilation is maintained, including fitting background trickle ventilators to frames where required by regulations.

Local Authority Building Control (LABC) Notification Workflow

While FENSA self-certification is restricted strictly to standard window replacements in existing structural openings of similar sise, all structural alterations (such as widening openings, installing load-bearing lintels, converting windows into doors, or building extensions), commercial projects, and independent contractor fittings legally require Local Authority Building Control (LABC) sign-off. At Window Fitters Ltd, we manage the complete manual LABC notification and certification workflow for our clients, ensuring every project receives official local authority approval.

Our step-by-step certification process operates as follows:

1. Pre-Installation Council Notification: Prior to starting work, we submit a Building Notice application to the relevant local council's building control department (or an approved private building control inspector). This includes the detailed engineering specifications of the A-rated frames, safety glass, and ventilation details to be used.
2. Structural & Technical Assessment: The building control surveyor reviews the specifications to confirm that they meet the relevant documents (Document L for thermal U-values, Document K for safety glass, Document F for ventilation, and Document Q for security).
3. On-Site Council Inspections: Once the installation is complete, we arrange for a Building Control officer to visit the site. The inspector physically checks the frames, fixing anchors, safety glass stamps (BS EN 12150), perimeter EPDM weather sealing, and trickle vents.
4. Completion Certificate Issuance: Following a successful inspection, the local authority issues a legal Building Regulations Completion Certificate. This is the official document that is recorded in the property's local land charges register, which is essential if you ever sell the property or are audited for commercial building compliance.

2. Commercial Insurance: £5M Public Liability & £10M Employers' Liability

Window Fitters Ltd operates with robust commercial insurance protection across all residential and commercial site operations:

• £5,000,000 Commercial Public Liability Insurance: Covering all residential installations and commercial subcontracts against third-party property damage or injury.
• £10,000,000 Employers' Liability Insurance: Providing comprehensive statutory protection for our 100% directly employed glazing workforce across all active project sites.

3. British Standards & Security Compliance (BS EN 1279, BS 7412 & PAS 24)

We source our products exclusively from manufacturers whose materials meet British quality standards, and we ensure our installations meet strict security regulations:

• BS EN 1279: Assures the quality and seal integrity of our double and triple-glazed insulated units, preventing moisture and condensation between the panes.
• BS 7412: Regulates the manufacturing quality, weather tightness, and security performance of our uPVC window profiles.
• PAS 24 (Enhanced Security Performance): All external windows and doors we supply and install are certified to PAS 24 standards. This indicates that the complete windows and doorsets have undergone rigorous physical testing to resist forced entry methods used by opportunistic burglars, satisfying Approved Document Q (Security) of the Building Regulations.

4. Professional Qualifications & CSCS Cards

In addition to company-level insurance and product compliance, our fitting teams are individually qualified professionals. 100% of our directly employed installers hold valid CSCS (Construction Skills Certification Scheme) cards, certifying that they have completed the necessary occupational health and safety training and possess the technical glazing competencies required for safe, professional onsite operations. Our Head Fitter and Director, Marian Gheorghe, personally supervises all works to ensure strict adherence to British Standards BS 8214 (for fire doors) and BS 8213-4 (for windows and external doorsets).

5. Workmanship & Product Guarantees

To back up our certifications, every installation comes with our standard warranty programme, including a 10-Year Guarantee on frames, a 5-Year Guarantee on sealed double glazed units, a 1-Year Warranty on locks, handles, and moving parts, a 5-Year Guarantee on conservatory bases, and a 5-Year Workmanship Warranty.

For detailed safety disclosures, insurance details, terms, and policies, you can view and download our full compliance declarations and Legal Documents online.