Flashcards
upper floors
Flashcards do conjunto (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—
Informações
- Descrição
- FlashCards sobre upper floors, criado por Caroline Flynn em 11-04-2017.
- Criado por
- Caroline Flynn · abr 2017
- Atualizado
- 7 mar 2018
- Visualizações
- 0
- Avaliação