As per the title, a friend has a bungalow with solid floors, and these
appear to be uneven with an uneven layer of bitumen on top.

Floorboards laid on the bitumen (bitumen stuck to the underneath).

The nails holding the floorboards together have rusted away, and the
boards are wobbly.

What is the recommended (economical) way to redo the floor?
The old boards will come up, and new larger boards will be put down, but
how should the floor be levelled before hand?

As far as I can see at the moment, trying to remove the old mastic is
likely to be difficult and expensive, a screed over the old mastic will
need to be quite thick and so raise the floor level well above original.

Possibly a bit more bitumen, but properly laid?

If I was doing it I might just Kango the floor out and then relay properly
with under floor insulation, but this is likely to hit the 'expensive'
barrier.

Advice welcome.


Cheers

Dave R


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Windows 8.1 on PCSpecialist box