Costs involved in replacing one joist support

Hi, I had arranged for a joiner to lay a herringbone floor but upon checking the floor it was springy in one section. The joiner believes I may need a new joist support or a new joist. Does anyone know if this is a big job, what’s costs are involved and how long it will take to repair. Thank you.

Asked by Claire on 27th Jul 2022
Expert Trade Answers
"It will be around 200£ it is depends how is hard to change the joist"
Answered on 10th Aug 2022 - Member since Mar 2020 - report
"Sir,
Once it comes to joint,and floor ground work,the land those not belong to you,it belong to Queen of England by law,So there for you need local Council permission.
Above all you only borrow the land,even if you pay ground Rent of lease fees.
Regards
Sir Amai ( Architect).-- To Avoid Collapse of the build or pipe burst...Electrical Damage Or Water And Drainage Damage and Pollution."
Answered on 3rd Aug 2022 - Member since Jun 2020 - report
"Unlikely to be a portion of the joist that's bad. Like he's said probably just needs re fixing
Cll contracting"
Answered on 27th Jul 2022 - Member since Dec 2016 - report
"The issue cannot the evaluated remotely. It should be investigated and adequate solution implemented. Big or small will depend on the judgement of the professional, cost and time-scale would vary accordingly."
Answered on 16th Aug 2022 - Member since Aug 2022 - report
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