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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:
-
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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DECKING MATERIALS





Each category has literally dozens of different brands to choose from. Low maintenance decking manufactures have made many advancements in creating more attractive products that perform better than the old products from the 80's and 90's. The new products are less likely to fade, stain and breed mold and mildew. There is a tremendous variety of natural looking colors to choose from including many variegated tones that imitate realistic exotic hardwood grain patterns. New lines of colors are added so often many deck builders now refer to the ever expanding design choices as "deck fashion".The main benefit of low maintenance decking is that you will never have to stain, seal or paint the decking like wood materials. Most higher quality synthetic decking materials are sold with a warranty against splitting, cracking, rotting and insect damage. Your local building department may require that the product you install has an evaluation service report from an accredited materials testing laboratory to provide proof that the decking will meet certain architectural standards. You can find a complete list of the ESR reports here. Another consideration is the installation instructions. Some low maintenance decking boards can be simply screwed down with special reverse thread screws to prevent the material from "mushrooming" on the surface. Other decking systems have a grooved edge to provide a surface to attach hidden fastener clips. Most low maintenance decking products use polyethylene (HDPE or LDPE) plastic or PVC (polyvinyl chloride) as the base material for their decking boards. Composite decking is created by mixing polyethyle with wood fiber, rice hulls or other fillers as well as a blend of chemical additives. Most low maintenance decking planks are available in 5/4x6 dimensional boards in 12', 16' and 20' lengths. Some composite products are hollow and others are solid. PVC or vinyl decking has become a popular alternative to composite decking in recent years. Some composite companies have created new products that encapsulate the composite material with a thin layer of PVC capstock for a hardened exterior shell that protects the material from stain, mildew, scratching and UV fading. As the material is extruded it is usually given a textured surface for slip resistance and appearance. Some products have reversible boards that have a wood grain side and a brushed finished side. Most low maintenance decking materials can be machined and cut just like wood decking. Always read the installation instructions before framing your deck. Most composite decking is designed to be installed horizontally over 16" on center framing or diagonally over 12" on center joists. Most low maintenance materials are recommended to be installed at least 24" above the ground to allow ventilation below the deck. Most low maintenance decking companies also manufacture their own matching railing systems and accessories such as trim boards and low voltage lighting. Remember there is no such thing as a truly no-maintenance material. Any outdoor living space will require occasional cleaning of dirt and debris.Most low maintenance decking products use polyethylene (HDPE or LDPE) plastic or PVC (polyvinyl chloride) as the base material for their decking boards. Composite decking is created by mixing polyethyle with wood fiber, rice hulls or other fillers as well as a blend of chemical additives. Most low maintenance decking planks are available in 5/4x6 dimensional boards in 12', 16' and 20' lengths. Some composite products are hollow and others are solid.
PVC or vinyl decking has become a popular alternative to composite decking in recent years. Some composite companies have created new products that encapsulate the composite material with a thin layer of PVC capstock for a hardened exterior shell that protects the material from stain, mildew, scratching and UV fading. As the material is extruded it is usually given a textured surface for slip resistance and appearance. Some products have reversible boards that have a wood grain side and a brushed finished side.
Most low maintenance decking materials can be machined and cut just like wood decking. Always read the installation instructions before framing your deck. Most composite decking is designed to be installed horizontally over 16" on center framing or diagonally over 12" on center joists. Most low maintenance materials are recommended to be installed at least 24" above the ground to allow ventilation below the deck. Most low maintenance decking companies also manufacture their own matching railing systems and accessories such as trim boards and low voltage lighting.
Remember there is no such thing as a truly no-maintenance material. Any outdoor living space will require occasional cleaning of dirt and debris.