Preventing traffic noise through bathroom vent


3 Mar 2014
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United Kingdom
Hi all,

I am getting my bathroom refitted. The bathroom is top floor and facing onto a busy main road with lots of traffic. There isn’t currently an extractor fan.

Initially the plan was to fit the extractor fan into the wall, but I’m concerned this will allow all the traffic noise to come in.

Alternatively, I could put a vent tile in the roof and pipe a ceiling extractor fan to the vent, but I’m concerned this could still allow traffic noise in.

Does anyone have any suggestions for solving this problem?
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There are acoustic vents and shuttered extractors for this purpose
There are baffles and foam products that will reduce the passage of sound through any duct, but they will also reduce the efficiency of the extract fan.

A wall fan with a mechanical shutter to close when not in use may be a better solution.
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If you want to keep out traffic noise, brick the hole and vent elsewhere, the roof as you say probably your best option.
The downside, is of course cost. A more powerful fan, ducting, extra work involved.
But you'd be well annoyed if you'd gone for a shuttered option, only to be extremely disappointed that 1mm of thin plastic doesn't block the noise from motorbikes and lorries.
Are sound-proofed vent tiles available on the market, or are they all a standard model? This is for a slate roof.

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