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ENERGY EFFICIENCY & U-VALUE PERFORMANCE
At Best Deal Windows, we proudly supply and install window and door systems manufactured with the highest industry standards. Partnering with Selecta Systems, we offer Eurolook70 profiles combined with Thermaglas sealed units to deliver exceptional thermal efficiency and compliance with current UK Building Regulations.
Our multi-chambered window and door profiles, in combination with 40mm triple glazing (TGU) or 28mm double glazing (DGU), can achieve U-values as low as 0.8 W/(m²K). These performance levels help homeowners reduce energy bills, improve comfort, and meet sustainability targets.
DOCUMENT L — Future Homes Standard Compliance
Our products fully comply with Document L, ensuring energy efficiency standards are met for both new and existing homes.
New homes now require:
✓ Windows: U-value ≤ 1.2 W/(m²K)
✓ Doors: U-value ≤ 1.2 W/(m²K)
For existing homes:
✓ Replacement windows must meet at least 1.4 W/(m²K)
✓ Replacement doors (with >60% glass) must also meet at least 1.4 W/(m²K)
DOCUMENT F — Ventilation Requirements
As of June 2022, homes must have background ventilators with trickle vents unless other adequate systems exist.
✓ Kitchens/Living Rooms: 8000mm² (2 EA)
✓ Bathrooms/Toilets: 4000mm² (1 EA)
Stricter requirements may apply where natural ventilation is limited.
2022 BUILDING REGULATION CHANGES
As of 15 June 2022, updates to Part L and F require:
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Lower U-value limits for both new and existing homes
-
Mandatory background ventilation
-
Full compliance with carbon efficiency targets
SUPPORTING THE NET ZERO 2050 GOAL
Best Deal Windows is committed to the UK government's goal of achieving net zero carbon emissions by 2050. By offering energy-efficient windows and doors, we help reduce overall carbon impact, support sustainable building practices, and future-proof properties against tightening regulations.
WHY CHOOSE US?
✓ A-rated systems with U-values as low as 0.8
✓ Fully compliant with Document L & F
✓ Expert installation with technical support
✓ Ideal for new builds and renovations
✓ Environmentally responsible solutions
📞 Contact us today to discuss your project requirements or request technical documentation.
At Best Deal Windows, we proudly supply and install window and door systems manufactured with the highest industry standards. Partnering with Selecta Systems, we offer Eurolook70 profiles combined with Thermaglas sealed units to deliver exceptional thermal efficiency and compliance with current UK Building Regulations. Our multi-chambered window and door profiles, in combination with 40mm triple glazing (TGU) or 28mm double glazing (DGU), can achieve U-values as low as 0.8 W/(m²K). These performance levels help homeowners reduce energy bills, improve comfort, and meet sustainability targets. [...]DOCUMENT L — Future Homes Standard ComplianceOur products fully comply with Document L, ensuring energy efficiency standards are met for both new and existing homes.New homes now require:
Windows: U-value ≤ 1.2 W/(m²K)
Doors: U-value ≤ 1.2 W/(m²K)
For existing homes:
Replacement windows must meet at least 1.4 W/(m²K)
Replacement doors (with >60% glass) must also meet at least 1.4 W/(m²K)
DOCUMENT F — Ventilation RequirementsAll replacement and new-build installations follow Document F, which requires background ventilation to ensure healthy air flow:
Trickle vents must be fitted regardless of whether existing windows had vents
Minimum vent sizes per room type:
Kitchens/Living Rooms: 8000mm² (2 EA)
Bathrooms (with or without toilet): 4000mm² (2 EA)
For new homes with natural ventilation, stricter requirements apply based on layout and air tightness.--- 2022 BUILDING REGULATION CHANGES As of 15 June 2022, updates to Part L and F require: - Lower U-value limits for both new and existing homes - Mandatory background ventilation - Full compliance with carbon efficiency targets Our windows and doors are manufactured in line with these updated standards, helping customers stay compliant while reducing energy use. --- SUPPORTING THE NET ZERO 2050 GOAL Best Deal Windows is committed to the UK government’s goal of achieving net zero carbon emissions by 2050. By offering energy-efficient windows and doors, we help reduce overall carbon impact, support sustainable building practices, and future-proof properties against tightening regulations. --- WHY CHOOSE US? ✔ A-rated systems with U-values as low as 0.8 ✔ Fully compliant with Document L & F ✔ Expert installation with technical support ✔ Ideal for new builds and renovations ✔ Environmentally responsible solutions Contact us today to discuss your project requirements or request technical documentation.
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FRENCH DOORS



French Doors
Installing French doors can be the ideal solution for openings that are too wide for conventional single doors and too narrow for sliding patio doors. This option allows users to make the most of a difficult situation, in terms of accessibility and attractiveness.
French doors provide easy access to your garden or a divider between your house and conservatory, without the need to create a huge amount of space for the doors to open. This particular type of entrance is made up of two saloon-like doors, which create a large opening space, without the need for a huge clear area of space for the swing action of the doors.
Made primarily from glass, extending from top to bottom, French doors provide a magnificent view of the outdoors and allow natural light to illuminate your home. At Sheerwater Glass, we have an incredible range of French doors for sale in Surrey, manufactured to exacting standards from either UPVC or Aluminium.
Security
A Sheerwater Glass French door is amongst the most secure that you can have installed – you won't have to worry about security issues. Our French doors are manufactured with a high-security multipoint locking system as standard. The system employs eight points of activation contact along with hinge bolts with the doorframe, which makes these doors almost impossible to penetrate. You can rest assured that your new French doors are extremely secure.
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Installing French doors in your home will provide a practical, secure solution to gain easy access to outside space giving that continental ambience. At Sheerwater Glass we have a wide variety of colours and styles to match the style of any property.
With an array of finishes and additional features, you really can customise a set of French doors that are totally unique to your taste. Give your home some glamour today and contact one of our helpful consultants to see what we can do for you.









































