venting a fan through the roof

[JohnHunter1]

Has anyone vented a bathroom fan through a tiled roof?

If so has there been any problems from the following and how do you avoid them.

i) Condensation running rom the outlet in the roof, back along the pipe to the fan and accumulating in the pipe....I've heard of lagging the pipe, but how will this stop droplets forming at the outlet where is might be below freezing?

ii) wind blowing down the outlet...(which will probably be an adapted imitation roof slate, bought for the purpose) and back into the bathroom?

Also is it an easy job for a roofer to fit the outlet 'slate' ?

Thanks,

John H.

 

[stem]

i) Condensation running rom the outlet in the roof, back along the pipe to the fan and accumulating in the pipe....I've heard of lagging the pipe, but how will this stop droplets forming at the outlet where is might be below freezing?

You won't stop it completely, so fit one of these at the lowest point, it collects condensation and allows it to be drained away. Insulation will reduce the formation of condensation, so is still worthwhile.
Click Here for Condensation Trap

ii) wind blowing down the outlet...(which will probably be an adapted imitation roof slate, bought for the purpose) and back into the bathroom?

A roof mounted one creates less of a problem than a wall mounted one, because the wind passes across the top of the vent rather than blowing directly at it.

Also is it an easy job for a roofer to fit the outlet 'slate' ?

Yes.