New dwellings

New dwellings

Proposed amendments to the Technical Booklet Guidance to Part F of the Building Regulations in Northern Ireland are expected to have a significant impact on glass and glazing products in new dwellings.

Ending on 19th December 2021, the consultation proposes an uplift of standards in Part F (conservation of fuel and power) of the Building Regulations in Northern Ireland.  This is seen as an interim step towards nearly zero energy requirements for new dwellings.

For new dwellings, the Dwelling carbon dioxide Emission Rate (DER) for the proposed dwelling must not be greater than the Target carbon dioxide Emission Rate (TER) based on a notional dwelling of the same size and shape.

Limiting values have been set for each element of the building fabric, although achieving the TER may require better performance.  The current and proposed limiting U values for fenestration are summarised in the table below.

Element Limiting U values for new dwellings (W/m2K)
Current standard
Proposed new standard
Area-weighted average
Maximum at any point
Area-weighted average
Maximum at any point
Windows, roof windows, glazed rooflights, curtain walling and pedestrian doors
2.0 3.3 1.4 3.0

We manufacture a range of low emissivity glass for enhanced thermal insulation that can help windows and doors achieve the above U values.

Upon completion of the consultation and review of the responses, it is anticipated that the new guidance will apply to new plans from as early as practicable in 2022.

To access the consultation documents, please click here.

Through our hub, we will monitor developments as the Part F 2022 consultation progresses and report on the implications as they emerge.

If you have any questions on the proposed amendments to Technical Booklet Guidance to Part F for 2022 in Northern Ireland and what the implications might be for glass, please complete our online contact form, selecting 'Architect' or 'Trade' as the Enquiry Type and 'Part L' as the Nature of Your Enquiry.

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