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I cant help with the flooring questions, but I'd be wary of ways for damp to wick across there. (I'm a bit of a one track minded broken record in that respect)
Is there a DPC under there?
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He's not laying it on top of the hearth rubble, he's taken off the top layer of mortar that was used to level the hearth with the floor and glueing the boards to that. Its the easiest way of doing it but not what I would do it as this way presents a couple of issues:
- Floorboards will expand and contract slightly with the seasons and changes in humidity. Nails will allow this to happen (especially old fashioned cut nails most often found in floors like this), however when you glue the boards to an inflexible surface like stone either the glue or the boards will fail (it doesn't matter how good the glue is).
- Because the sub floor is also timber it too is prone to movement. If there is any vertical movement then there will be a bump in your floor that appears and disappears.
Because of the two reasons outlined above I'd always recommend removal of the hearth but this isn't something a diyer should undertake as the hearth is often cantilevered out from the chimney itself.
- Floorboards will expand and contract slightly with the seasons and changes in humidity. Nails will allow this to happen (especially old fashioned cut nails most often found in floors like this), however when you glue the boards to an inflexible surface like stone either the glue or the boards will fail (it doesn't matter how good the glue is).
NotThamesWater
Bobbo
@tbc
Me again!
Today's annoying enquiry is about removing a hearth and putting floorboards above it.
Here's a video of someone doing it:
https://youtu.be/n87liO4Vfxg
Is this a good method, laying the boards directly on top of the flattened hearth rubble?
What is it they're using on top of it to stick them down?
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