My parents house is an ex-council home built 1952. I assumed the
ground-floor was concrete, but on inspection it seems to have a kind of
bitumen or tar top layer - is this possible? It's breaking up in some parts
and the pieces do look like black tar...
The floors need levelling and wondered what the best way to go is.
The bitumen is probably both a levelling compound and insulation in one. In
my house the bitumen was laid after the skirting and kitchen were fitted.
Where I have removed the hearth and kitchen units I used a self levelling
compound mixed with sand to raise the missing bits to the existing level.
The floor surface you refer to is Asphalt. Asphalt is a mixture of bitumin
and fine gravel, heated in a tank pulled by a lorry. Its uses are for
floors, flat roofs and tanking. When laid for flooring a layer of
Batiscloth ( Batiscloth type of course felt with a bitumen mixed in) is put
down first and the hot asphalt spread on top. When it get old it can be
lifted easy, it comes up like a slab of cold toffee.
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