Science Experiment – Keeping the damp out

Throughout the school classes have been doing a Science experiment called ‘Keeping the damp out’.
Old houses can sometimes be damp because they have no ‘damp course’. Bricks absorb moisture from the ground and this moisture rises up the walls. A damp course stops this from happening.
The aim of the experiment was to see what material will make the best damp course i.e. stop water rising up though walls.
  • We used sugar cubes as ‘bricks’.
  • We put a small amount of water on a plate and added a few drops of food colouring
  • We put two sugar cubes, one on top of the other, into the water. The water rose up though the sugar cubes straight away.
  • Next we put sugar lumps into the water with a piece of kitchen towel, a piece of greaseproof paper and a piece of plastic between them.
What happened?
  • The kitchen towel let the water through to the second cube.
  • The greaseproof kept the water from getting to the second cube most of the time but eventually it began to seep through.
  • The plastic stopped the water from going through completely.
Therefore we decided that plastic was the best material to keep the damp out.

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