Level sloping wooden floor in period property

Question

Hi there
  
We have a sloping floor in a room on the first floor of our 1900's house in London, size is roughly 3.5 x 3.5m (13m2). It slopes about 3 inches from one side down to the other side. The current joists (underneath the laminate we took off) are in good condition. Can anyone suggest how much it would very approximately cost to level the room and put sheets of plywood over the joists? (we will add engineered wood flooring later on top). And how long it would take with how many people?

thanks

Toader · Answer

Hi ! Thanks for the details—very helpful.

A rough estimate for leveling your floor (13m² room, ~3-inch slope):
Option: Firring strips or sister joists method (since joists are in good condition)
This is a common, cost-effective method where timber strips are cut to gradually level the slope, then plywood sheets are laid on top.
- materials should cost around £600 
- labour price depends of many other factors but I'll say anywhere beetween £800 - £1200

Please let me know if you need any other info 
Thanks

Marian · Answer

Hi there ,
I would remove the existing flooring to free all the joists,relevel each joist by cutting slots in to the stone or blocks and replace any damaged ones.
Next step would be installing new T&G flooring.
I would say £400 to be spent on materials and £800 on local labour .
It shouldn't take more than 3 days to a carpenter. 
I hope it helps!

Level sloping wooden floor in period property

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