Is building regulations approval needed for repairing damaged floors?

23.06.2019
Blog Post
Image of flood damaged floor undergoing repairs

If you’re contracted to do a job where timber or concrete ground floors are to be replaced, or are a homeowner faced with a damaged floor (for example after flooding) you'll need to check to see whether a building regulations application is needed.

A Building Notice application to your local authority before you start the job is a simple way to ensure the work complies with the regulations and has the right certification.

The regulations require that where floors (or certain features of floors) are replaced, they must meet the requirements for 'renovation of a thermal element' - meaning that if you’re affecting more than 50% of the floor, it should be entirely renovated including insulation to improve the thermal efficiency.

Replacement of timber floorboards, concrete ground floors or screeds triggers this requirement. In each case if the existing floor doesn’t achieve a U-value of 0.7w/m2k, additional insulation is required. Since most of the heat lost through ground floors is at the edges, sometimes additional insulation won’t be needed at all – get in touch with your local authority building control surveyor for more advice and guidance.

If you suspect damage to a building’s foundations, get a suitably qualified person to investigate this. There’s particular risk on sloping sites.

If underpinning or foundation repairs are necessary, a building regulations application will be required for the work.

To be on the safe side, ensure all notifiable work is approved under the building regulations.

Contact your local LABC team by using our free post code search tool to find your local team.

Further information

See Flood damage repairs for related information.

What type of building regulations application do I need?

 

Please Note: Every care was taken to ensure the information was correct at the time of publication. Any written guidance provided does not replace the user’s professional judgement. It is the responsibility of the dutyholder or person carrying out the work to ensure compliance with relevant building regulations or applicable technical standards.

Comments

REGULATIONS FOR REPLACING A SOLID FLOOR

Submitted 6 mis ago

I HAVE READ YOUR ARTICLE - VERY USEFUL. I HAVE A QUESTION ABOUT THE "MORE THAN 50% RULE". UNDER INSURANCE, CONTRACTOR BEGAN WORKS AUG 2019 INC REPAIR HALF THIS AREA, BUT FAILED TO INSTALL DPM [EVIDENCE WAS DISCOLOURATION/ EFFLORESCENCE IN TILE GROUT. AFTER A YEAR OF INVESTIGATION RETURNED JUNE 2021 TO DIG OUT COMPLETELY THAT SAME AREA. BEEN 5 MONTHS AWAITING SLAB/SCREED TO DRY SUFFICIENTLY AND READY TO TILE - NOW I DISCOVER THEY HAVE NOT INSTALLED THERMAL INSULATION. PLEASE HELP ME TO ESTABLISH IF THIS IS NEGLIGENCE AND ALSO IF THE THERMAL INSULATION MUST INCLUDE THE OTHER HALF [WHICH WAS NOT DUG UP]. THE AREA IS 2 ROOMS OPEN PLAN SINCE 1981. ITS THE "MORE THAN 50% RULE" THAT LEAVE ME WITH A QUESTION, BECAUSE THE AREA CONCERNED IS ACTUALLY 50%. NEED SOME CONCLUSIVE ADVICE TO KNOW MY RIGHTS PLEASE. I HAVE SPOKEN WITH SCC BLDG CONTROL AND THEY HAVE CONFIRMED WHOLE AREA MUST INCLUDE BOTH DPM [WHICH HAS NOW BEEN INSTALLED THIS YEAR] AND THERMAL INSULATION. COSTS TO ME ARE NOT OF CONCERN BECAUSE I'M COVERED BY MY INSURANCE. WHAT SCC HAVE ALSO CONFIRMED IS THAT NO BUILDING REGULATION APPLICATION WAS SUBMITTED BEFORE THE WORKS IN 2019 AND IF ONE HAD BEEN THEY WOULD HAVE BEEN GIVEN THE REQUIRED INFORMATION WHICH WOULD HAVE ENSURED BOTH DPM AND THERMAL INSULATION WERE INCLUDED IN 2019. I WOULD HAVE BEEN OUT OF THIS DREADFUL SITUATION IN WHICH I'VE BEEN LIVING FOR MORE THAN 2 YEARS.

LABC response

Submitted 6 mis ago

Hi,

I have provided the relevant guidance in relation to the 50% question posed. Our guidance is provided for our members and the wider construction industry including homeowners. I note that you have been in contact with your LABC team at SCC on the matter and as such we (i.e. LABC because it is a member organisation) are unable to comment further.

Please see:
https://assets.publishing.service.gov.uk/government/uploads/system/uploads/attachment_data/file/697629/L1B_secure-1.pdf

- Appendix A: page 21. First point.
- Ground floor constructions: page 23

Best,
LABC team

Ychwanegu sylw newydd

This question is for testing whether or not you are a human visitor and to prevent automated spam submissions.

Sign up to the building bulletin newsletter

Over 48,000 construction professionals have already signed up for the LABC Building Bulletin.

Join them and receive useful tips, practical technical information and industry news by email once every 6 weeks.

Subscribe to the Building Bulletin