How can I reduce condensation in my shed?

Question

I've started to get damp patches appearing on the underside of my shed roof. The roof was re-felted a couple of years ago, so I'm confident that it's waterproof. 
But there's a damp patch on one corner of the floor.
Should I leave windows open, or could I make some ventilation holes so air can circulate?

Caleb · Accepted Answer

Yes go with venting. open windows, open the door. a permanent solution is allow airflow in around the bottom edge of the roof line and install some vents at the peak. The air will naturally flow up and out across the whole roof if done right. 

If you didn't have felt on the roof before it may be possible that it breathed well enough through the roof. If it did have felt, see if the new stuff is synthetic. I've heard that the new synthetic felts don't breath and essentially form a vapour barrier which could easily cause condensation if the area directly bellow isn't vented properly.

Anonymous · Answer

=== in my opinion you will be better off to run a proper line == perhaps you will do that in the future === make your own extension line with a careful measure of cord that will make the run and use a cable that is 14 gauge with three wires inside ....your computer needs to have some type of suppression to prevent the event electric spikes, lightening strikes, and proper ground signal light with a breaker that will stop a power surge and protect your computer ... a cheap 16 gauge power cord will operate what you want it to do but it is not a very good thing .... PLEASE NOTE ... electricity does actually screw or spiral around the copper wire and an overload causes the wire to heat up and the breaker senses this ""heat up"" and trips ----- So the smaller the wire the more likely the spiral to get wound tightly and trip the breaker ..... this is why I am suggesting that you use 14/2 w/gnd. cable to power the office & shed === it will cost more for the 14ga cable and plug [[ use a square plastic wall box that you can mount to the wall for two wall socket plug-ins ]] this is probably not what you want to hear but the cost to protect the L-tops & printer far outweighs the replacement costs .... sounds like the quiet office space ...

Asing Singlei · Answer

Make some ventilation holes that will of course decrease damp  patching.

Paul · Answer

Dampness is humidity, so you have a humidity problem.  Myself, I'm not crazy about making holes.

Try a dehumidifier.

Beep · Answer

yes open a window or leave the door open during the day, it will dry out during summer, you can treat the wood then with some waterproof paint.

How can I reduce condensation in my shed?

5 Answers