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  • Today's four figure surprise is that we need a new subfloor as the ventilation is not good towards the rear of the front room, moisture has been getting in and there was a lot of damp under the floor. Also the joist level moves 5cm down from one side of the house to the other.
    As we want it all flat and the same level the site manager has suggested a concrete subfloor just as they are installing for the kitchen.

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    Can I borrow that when you're done? Need another £36k

  • Couldn't they sister all the joists and bring the level up that way? It will cost a lot less than a concrete floor.

  • ventilation is not good ... moisture has been getting in and there was a lot of damp under the floor.

    I suspect this is happening in my house, hidden by the laminate floor. There are weeds growing out of the airbricks at the front, that suggests a certain amount of moisture under the floor...

    Also - are you hoping that decorative plate will still be there when your building works are done?

  • If there's a tendency to damp, I'd worry that slapping a concrete floor down in (what looks like) a Victorian terrace is going to channel damp to places that you really don't want it, and will be next to impossible to fix without digging it all up again.

    What is causing the damp?

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