Changes to the Building Regulations come into effect on 15th June 2022

Building Regulations 2022 Update Extensions and Alterations Guidance

For applications submitted before 15th June 2022 and provided work is commenced before 15th June 2023 the current Building Regulation requirements will be applicable. A commencement for this purpose would be either foundations or drains in connection with the work specified on the application.

Approved Document F – Extensions & Alterations noteworthy changes

Summary of changes to Approved Document F & L as of June 2022

• Night latches cannot be used in place of trickle vents. (Part F: Paragraph 1.52)
• Open plan kitchen diners need a minimum of 3 trickle vents in a room (8000mm2 each). (Part F: Paragraph 1.52)
• Minimum requirement for trickle vents now 8000mm2 for habitable rooms or 10,000mm2 for single-storey dwellings. (Part F: Table 1.7)
• Exposed Façades in busy areas (main road etc) will require noise attenuating trickle vents. (Part F: Paragraph 1.54)
• Existing home ventilation guides are required to be given to the homeowner by the builder. (Explaining how to use and ventilate efficiently etc) (Part F: Paragraph 4.20 Part F)
• All replacement windows must have trickle vents regardless of whether the previous windows did. (Part F: Paragraph 3.15)
• Energy efficiency measures in existing homes means the ventilation of the dwelling must be assessed. Doing multiple minor works (Insulating lofts, replacing loft hatches etc.) or major work (bricking up chimneys, installing internal wall insulation etc.) will now require ventilation retrospectively and in some cases, you will require a ventilation report to specify new ventilation requirements. In most cases retrofitting trickle vents will be an adequate method. (Part F: Table 3.1, Paragraph 3.6-3.13)

Approved Document L – Extensions & Alterations noteworthy changes

• New thermal elements, replacement thermal elements and glazing need to meet new U-Values. (Part L: Table 4.2, Paragraph 4.7)
• Highly glazed extensions – max openings limited to 25% of the floor area of extension plus any existing covered still applies. If over SAP calculations or area weighted U value calculations are required, usually specifying a higher U-Value than Part L requires. Calculations are required before starting works. This also includes new glazing in existing buildings i.e., extending openings for Bi-folds etc. where exceeding 25% glazing of the total floor area of the dwelling. (Part L: Paragraph 10.10)
• Increases in efficiency requirements when replacing/extending existing heating systems (Part L: Section 6) i.e., minimum SEDBUK of 92%, enhanced controls, additional requirements for combi boilers.
• Renovating thermal elements still applies but with more clarification. Most U values stay the same however replacing a flat roof membrane will require insulation upgrades. (Part L: Paragraph 11.2)
• Exempt structures such as conservatories and porches under 30m2 will no longer be exempt if heated by any fixed heating even if a separate system to the house is now deemed as controllable work. (Part L: Paragraph 0.14)

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