WINDOW & DOOR

ENERGY RATINGS & U VALUES

TOGETHER, WE CAN MAKE HOMES MORE SECURE, WARM & ELEGANT

Our window and door systems have been designed with the intention of improving the thermal performance of any property.

The multi-chambered PVCu window and door profiles offer excellent thermal insulation, as the gaskets and weathertight seals shut out draughts while the glazing reflects the heat back in to the property.

TECHNICAL SUPPORT - ENERGY RATINGS & U VALUES

Thermally efficient PVCu window and door systems

Our multi-chambered window and door profiles achieve Document L and Future Homes Standard U Values and Energy Ratings, without adding unwanted expense.

Reducing energy bills and making the home more thermally efficient are high on the agenda of most homeowners. Understanding that fitting the right combination of profile and glass units is important and an area where Selecta supports its customers base.

Providing cost effective solutions to achieving the desired rating is imperative and also understanding that it's not all about obtaining the highest rating! The added cost of reaching a better rating could out-way the expenditure and provide none or very little return on the consumers investment.


U VALUES

Designed to enhance the thermal efficiency of your next project

Excellent U Values can be achieved with a 4/20/4 28mm double-glazed unit, whilst a 40mm triple-glazed unit will increase both the thermal and acoustic performance further.

Our technical department continue to work closely with glass manufacturers to ensure that our window and door profiles achieve the best results with the minimum amount of fuss and expenditure.

For instance a U Value of 1.1 W/(m2K) can be achieved with a 28mm DGU, whilst a 40mm TGU can achieve 0.8 W/(m2K), thus Document L and Future Homes Standard compliant. Both glass configurations were attained using 4mm glass.

In Partnership With 

We have and continue to work closely with the team at Clayton Glass, achieving excellent U Values with both 28mm DGU’s and 40mm TGU’s. All of the above U Values have been achieved using 4mm glass, thus providing our fabricators and installers with a more cost effective solution when it comes to U Values.

Find out more about the partnership benefits of working with Selecta and Clayton Glass by contacting Clayton Glass directly

ENERGY RATINGS & U VALUE SUPPORT

We can help you with your next project specification requirement.

"Selecta Systems have a complete package of technical support to help you comply with building regulations, thermal efficiency and U value legislation whilst providing customers with accurate, verified window and door fabrication and installation specifications."

Contact the technical department for further support

BUILDING REGULATION CHANGES FOR 2022

What you need to know about the recent changes to Building Regulations

All new builds are to be zero carbon ready in support of the UK's bid to deliver net zero carbon emissions by 2050

Building Regulation Changes in 2022

In December 2021, The Department for Levelling Up, Homes and Communities (DLUHC) announced a raft of changes to Building Regulations, which came in to effect from 15th June 2022. This guide is aimed at helping you to understand the new regulations and to ensure that your projects are fully compliant.

Why Are Building Regulations Changing?

While uplifts around ventilation come from Public Health England data on indoor air pollution, the bulk of the building regulation changes in 2022 are part of the roadmap to the 2025 Future Homes Standard. A key part of this Standard is that all new builds are zero carbon ready in support of the UK’s bid to deliver net zero carbon emissions by 2050.

According to figures from the Department for Business, Energy & Industrial Strategy, heating and powering buildings currently accounts for 40% of the UK’s total energy usage. So, by implementing new building regs that help reduce the need for heat and power in buildings, the UK can make great strides towards its carbon zero ambitions.

The new regulations also affect the refurbishment and replacement window and door market.

Changes in 2022

The two Building Regulation changes that directly affect our industry are Document F (ventilation) and Document L (heating and energy). These will have an impact on both new builds and existing homes.

New minimum efficiency standards – In new and existing domestic builds, there will be a lower set of U-value for walls which affects windows, doors and rooflights.

Ventilation and indoor air pollutants – Background trickle ventilators will be required in new and existing domestic builds.

DOCUMENT L

Conservation of fuel and power - As of 15th June 2022

EXISTING HOMES

The performance of replacement windows must be no worse than the windows being replaced, but with a minimum performance as per below:

WINDOWS
Uw 1.4 W/(m2K) or Window Energy Rating Band B

DOORS >60% of internal face glazed
Uw 1.4 W/(m2K) or Doorset Energy Rating Band C

Notes:
Where a dwelling is extended by adding a conservatory or porch, the work is exempt from energy efficiency requirements, under Regulation 21 of the Building Regulations, if all of the following apply:
1. The extension is at ground level.
2. The floor area of the extension does not exceed 30m2.
3. The glazing complies with Park K of Schedule 1 to the Building Regulations.
4. Any wall, door or window that separates the extension from the dwelling has been retained or, if removed, has been replaced with a wall, door or window.
5. The heating system of the dwelling is not extended in to the conservatory or porch, neither does the extension have its own fixed heating appliance.

NEW HOMES

Minimum Performance Targets

WINDOWS
Uw 1.2 W/(m2K) - Frame Factor = 0.7

DOORS >60% of internal face glazed
Uw 1.2 W/(m2K) - Frame Factor = 0.7

The above values are Uw values - Whole window U values

Contact the technical department for further support

DOCUMENT F

Ventilation - As of 15th June 2022

EXISTING HOMES

Replacement windows should be fitted with trickle vents regardless of whether the windows being replaced had vents in them or not, if no background ventilation alternative is being installed.

Habitable rooms and kitchens: 8000mm 2EA.

Bathrooms (with or without a toilet): 4000mm 2EA.

Addition of a wet room to an existing building: 5000mm 2EA.

Addition of a habitable room to an existing dwelling (if existing room has less than 5000mm 2EA): 10,000mm 2EA.

If the existing dwelling has continuous mechanical extract ventilation fitted then 4000mm 2EA is required in habitable rooms.

NEW HOMES

Using Natural ventilation with background ventilators and intermittent extract fans guidance (suitable only for less air tight dwellings)

For dwelling with multiple floors:
Habitable rooms and kitchens: 8000mm 2EA
Bathrooms: 4000mm 2EA
Sanitary Accommodation/Utility Room: No minimum

For single storey dwellings (e.g flats):
Habitable rooms and kitchens: 10000mm 2EA
Bathrooms: 4000mm 2EA
Sanitary Accommodation/Utility Room: No minimum

There are some sub-rules:
Seek expert advice should the dwelling have a single exposed façade, or at least 70% of its openings on same façade, or the kitchen has no windows or façade for vents.
If kitchen and living room not separate, at least 3 vents of same EA as for habitable rooms should be provided in that space.
Total number of vents in habitable rooms and kitchen should be at least 5, or 4 if one bedroom property.
If a bathroom has no window or external façade through, which a ventilator can be installed, the minimum equivalent area specified should be added to the ventilator sizes specified in other rooms.
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