extractor fan through roof

drew l · 27 Jun 2005

I am installing an extractor fan from upstairs shower room and only exit is through loft and out through roof tiles. What is required for roof and would I be able to do this myself without getting out onto roof itself? Any advice appreciated.
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moved as posted in wrong forum (UK electrics?)

nstreet · 28 Jun 2005

One of these http://www.tlc-direct.co.uk/Main_Index/Ventilation_Index/Ventilation_Accessories_4/index.html

Basically you remove a tile and replace it with one of these, the vent pipe then goes through the rubber bit, giving a water tight seal. If you are going through the loft space vertically dont forget to fit a condensation trap http://www.tlc-direct.co.uk/Products/BGCT.html and to lag the ducting.

ban-all-sheds · 29 Jun 2005

drew l said:
would I be able to do this myself without getting out onto roof itself?

Yes and no.....

JayS · 30 Jun 2005

Got my bathroom in a flat roof extension. I did it pretty much the same as nstreet is suggesting, but being a felted roof I had to seal it using bitumen. Came out very nice!

JDLDIY · 6 Jul 2005

This looks OK for roof tiles/slates which are flat but what do you do if your roof tiles are wavy in profile? How is that condensation trap fitted - do you have to run the t-piece off to an overflow/drain?

nstreet · 6 Jul 2005

JDLDIY said:
This looks OK for roof tiles/slates which are flat but what do you do if your roof tiles are wavy in profile? How is that condensation trap fitted - do you have to run the t-piece off to an overflow/drain?

The piece is made from roofing lead, so you work it to fit the profile of the tiles. The condensation trap is fitted in-line with the pipe and the 't' is just the overflow, best just to run it out through the barge boards or soffit.

JDLDIY · 6 Jul 2005

Ahh.....yes I see that now, thanks.

civicwalker · 10 Feb 2009

I will have to run ventilation from my 100mm shower extractor fan thorugh 100cm of loft space and out through a 'made up' roof tile. As the roof tile is not directly above the fan i will have to use flexible ducting. Can a condensation trap be used with flexible ducting?

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extractor fan through roof

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