Flashcards
upper floors
Cards in this deck (6)
- 1what is radoncolourless, oourless, stable radioactive gas
come from radioactive decay of uranium - 2how does radon enter a buildingpressure driven and due to slightly lower internal pressure, travels inside. not problem on higher floors
- 3ways of preventing radon in houseradon membrane
radon sump - 4radon membranefully sealed across floor and external walls
can serve as a DPM
must be properly jointed and lapped
"top-hat" seal around service pipes - 5radon sumps-expels radon built up under the membrane
-positioned in the hardcore
-1 sump accounts for 250m2
-gaps must be left in internal rising walls to allow radon pass through to sump
-max. 15m from sump to extract pipe
-sump must be then ventilated
fan can be fitted later if radon level high - 6—
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- Flashcards on upper floors, created by Caroline Flynn on 11/04/2017.
- Created by
- Caroline Flynn · Apr 2017
- Updated
- Mar 7, 2018
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