What Are The FENSA Regulations
Established in 2002, FENSA (Fenestration Self-Assessment Scheme) is a government-approved body that ensures window and door installers comply with building regulations. This scheme protects homeowners.
How FENSA Impacts Window Installers
Starlight Windows Ltd is a FENSA-registered company, which means we can self-certify that all our installations meet building regulations and FENSA standards.
During installation, we must:
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Use the correct type of glass
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Ensure safe fire escape routes
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Maintain the structural integrity of your property
Once a project is complete, we register it with FENSA. Within 30 days, homeowners receive a FENSA certificate confirming compliance. Installers are also subject to regular FENSA assessments to guarantee consistently high standards.
Approved Document A | Structure
FENSA regulations prohibit us from fitting windows or doors that act as load-bearing elements. In older houses (such as those from the 1930s), timber-framed windows were designed to bear structural weight. Today’s modern uPVC windows cannot withstand such loads, so we must ensure the building’s structure remains supported before installing replacements.
Common Questions:
Do all windows and doors need lintels?
- New builds: Yes. All new properties require lintels.
- Replacements: Not always. If lintels or supporting brickwork are already in place and in good condition, extra lintels aren’t needed.
How can you tell if a lintel is necessary?
Our experienced surveyors look for warning signs such as cracked brickwork or broken glass. We also rely on local knowledge and property type. If, during installation, structural movement occurs, we may need to add a lintel and will always discuss this with the homeowner before proceeding.
Who pays for lintels?
As the property owner, the customer is responsible for costs. Unlike some companies that may cut corners, we always install lintels properly when required.
What about bay windows?
Bay windows, especially in older properties, often bear significant loads. To ensure safety, we use reinforced bay poles or, in severe cases, jacking plates to support the structure above.
Approved Document C | Resistance to Moisture
This section ensures windows and doors protect against:
- Ground moisture
- Rain penetration
- Condensation
- Leaks or spillages
How we prevent moisture issues:
- Checking existing damp course membranes in older homes
- Sealing windows with silicone and covering with uPVC trim to maintain a clean, durable finish
- Ensuring draught-proofing and weather resistance as standard
Approved Document F | Ventilation
Our range of uPVC Windows, Doors and Conservatories, which not only surpass all industry expectations and proposed BS legislation, but offer a whole new level of security and energy efficiency. Since then continuous improvements have been made across the range.
All of our products can be viewed at our extensive factory showroom without a prior appointment during office hours which are:
9:00 AM to 4:00 PM Monday to Friday
Other times are available on request. Feel free to get in touch on 01325 321301 or email us at sales@starlightwindows.co.uk to find out more.
Approved Document J | Combustible Appliances & Flues
Installers must ensure new windows don’t worsen ventilation around fuel-burning appliances or flues. Distances between windows and flues vary depending on the appliance type and output (e.g., 300mm for smaller systems, up to 2m for industrial boilers).
For conservatories, flues often need extending or relocating—something we assess carefully to prevent costly surprises.
Approved Document K | Protection from Falling, Collision & Impact
K2 – Falling and Collision Hazards:
- Windows below 800mm from floor level require restrictors to prevent falls or accidental collisions.
- Replacements can be like-for-like unless the design changes.
K4 – Impact Safety:
- Glass within 800mm of the floor or 300mm of a door must be safety glass (toughened, laminated, or wired).
- Bathrooms and staircases also follow this rule, depending on floor levels and step heights.
Approved Document L | Conservation of Fuel & Power
This regulation ensures windows meet strict energy performance standards. All replacements must achieve at least a C energy rating or a U-value of 1.6 or lower.
Starlight Windows exceeds these standards by installing A rated systems as standard, thanks to:
- Six-chamber uPVC frames for superior insulation
- Double-glazed units filled with argon gas
- Soft thermal coatings that trap heat inside
- Warm-edge spacer bars that prevent condensation at glass edges
This combination maximises energy efficiency, reducing heat loss while keeping homes warmer and lowering energy bills.
Why choose a fensa registered installer?
1. Guaranteed Building Regulation Compliance
FENSA-approved companies are authorised to self-certify that their installations meet government building regulations. That means you won’t need to arrange an inspection from your local council.
2. Peace of Mind & Protection
After installation, you’ll receive a FENSA certificate, proving the work complies with regulations. This certificate is essential when selling your home, as solicitors and buyers often request it.
3. Insurance & Consumer Protection
Registered installers must carry insurance, protecting you if anything goes wrong with the installation.
4. Energy Efficiency Assurance
FENSA ensures windows and doors meet current energy-efficiency standards, helping reduce heat loss and save on energy bills.
5. Quality & Regular Checks
FENSA regularly inspects registered installers to make sure their work continues to meet high standards, so you know the company you’re using is held accountable.
6. Hassle-Free Process
Because Starlight Windows registers the work directly with FENSA, you don’t have to worry about extra paperwork, building control approval, or additional fees.
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