How to stop condensation on corrugated plastic?

[Brian Gaff]

Another old reply thread reappeared?

Brian

[Uncle Peter]

You replied to my very old message.

[valeriemoore137]

One wall either side plastic roof pvc door and rest beside door pvc and plastic window in winter it's heavy dripping what can we do its built out side of backdoor part of garden

[Cynic]

Insulate the roof. Underdraw it with a sheet of kingspan or similar. It's a technique commonly used in beehives to stop condensation dripping onto the bees, especially in winter.

[Brian Gaff (Sofa)]

Well condensation occurs due to the air on one side being colder than the air on the other, so that as warm air holds more moisture, when it cools by being against a cold surface, it gives up its moisture to the plastic. Basically if it was indoors one would try to dehumidify the air indoors or double glaze the area or otherwise insulate. As somebody once said ye cannee change the laws of physics!

Brian

[Andrew]

Have you incorporated an uninsulated structure like a plastic conservatory as part of your kitchen by removing a door,wall, or patio door at some point. ?.

This means warm most air from inside the house is hitting the cold uninsulated plastic roofing.

If this work was done after Building Regs 2006 (Oct) revision then it is 'illegal', as in - you should have submitted a building regs napplication to your council. They would have made you upgrade the walls and ceiling of the lean-to or whatever to the same thermal regs as the main part of the house.

[tabbypurr]

Really depends whether your aim is to keep the damp down or just avoid getting dripped on but don't care about the damp, ie aren't keeping anything vulnerable to damp in there.

NT

[Andrew]

Move the tumble dryer back inside the kitchen and get a venting kit :-)