Bathroom Extractor Through Roof Tiles

Bathroom Extractor Through Roof Tiles

1. Hi all,

   Can anybody help me in choosing which roof tile I have in order for me to install a roof vent please? The roof vent is for connecting to a bathroom extractor via some 4" ducting.

   Many thanks

   Attached Files:

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3. I have had nothing but trouble venting bathroom extractor fans through the roof tiles ... mostly to do with condensation running back down the pipe. Is there no way in which you could vent out through a wall?

4. It would be too much work to be honest. I'll give the roof tile a go and if it doesn't help then I will look again. Thanks.

5. Just out of interest was your ducting horizontal or vertical?

6. It was vertical.

   I tried a number of different fans, all of which were specifically advertised for vertical ducting, but they all failed after a short while because of condensation running back down the ducting. I even added some serious insulation around the duct and then boxed it all in to try to reduce the condensation, but it just kept on coming.

   I eventually abandoned the whole idea of going through the roof, bit the bullet and bored a 150mm diameter hole right through the double skin outside wall of the bathroom. I installed a piece of 150mm soil pipe through the wall, sloping slightly downwards to the outside, so that any condensation would drip outside, not inside, and then covered the outside with a flap louvre vent, which blows open when the fan is on, but doesn't allow high winds to come inside. I used a standard 150mm Ventaxia with humidity and timer controls.

   It's all been in place for a few years now, with a family that takes loooooong showers, and the bathroom is nice and dry, with not the slightest sign/smell of damp.

7. Thanks for the info and glad you got it sorted.

   Mine is a horizontal run so I'll give the roof vent a go first as everything is almost in place.

8. Running a vent pipe through wall is usually better, as you can put slight fall on pipe to all any moisture to drain away.

   Can you not vent the fan through a vent in a soffit.

   

9. Not really had a look into the soffit way. Is it easy/straightforward enough to cut a hole in the soffit? Jigsaw?

10. Jig saw if vent is square or easier to use hole saw if round vent.

    Got one of these in soffit here.

    https://www.vent-axia.com/product/soffit-termination-set

11. Soffit would be good, as it's easy to cut - jigsaw, hacksaw blade, whatever - depends on what the soffit is made from and how easy the access is.Condensation WILL be an issue - the laws of basic physics - so make sure you plan for what to do with it. If you can drain it out onto the roof, then great, but it'll be hard to do without puddles accumulating, and puddles eventually overflow; so make sure the overflow goes where it's not going to create a problem.

12. The problem with the soffit route as i found out, is there might not be enough room between the wall plate and underside of tiles to get a round ducting through, i ended up using a piece of rectangular ducting to over come this problem, it was a pain though trying to fit yourself into a area thats not meant for you, tring to connect it all up.

13. I use flat ducting & a flat to round adaptor to fit to vent, also glued all joints, & runs between joist to get lowest profile..

15. Yes.

    Running it between joists, I could just get enough of a slight fall to the soffit vent.

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Bathroom Extractor Through Roof Tiles

Source: https://community.screwfix.com/threads/roof-vent.200344/

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