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1. The screed must be laid professionally
according to the DIN norm.
2. Mineral subsoil has to be heated before Topflor can be laid to prevent
any leakage of moisture which could damage Topflor. This is necessary at any time
of the year.
3. With a cement flooring, this heating can be performed after three weeks
and with anhydrite screed after one week.
4. Increase the temperature in 5 C steps per day until the maximum heat output
is reached.
5. Let heating run at maximum heat output for 72 hours without reducing the
temperature.
6. In order to ascertain whether the flooring is dry, use several pieces of
PE film (approx. 50 x 50 cm), gluing the edges down. If no condensation has formed
under the film after 24 hours and if the color of the flooring is unchanged, you
can start to lay Topflor.
7. One to two days before laying Topflor please switch the heating off. The
surface temperature of the flooring should be between 18 C and 20 C when laying Topflor.
8. If a heating engineer has turned the heat on and off, he is obliged to
provide you with a heating report.
9. Lay a PE film (0.2 mm) for damp-proofing and as a vapor barrier. Overlap
the strips by at least 20 cm and glue them down. Stick the strips approx. 5 cm up
the wall and later cover with skirting board.
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