Take the 2-minute tour ×
Home Improvement Stack Exchange is a question and answer site for contractors and serious DIYers. It's 100% free, no registration required.

This question already has an answer here:

I live in a rented property, when I moved in a new bathroom suite had been installed.

We however have had chronic condensation problems in the property.

when going into the loftspace I could not believe that the ventilation pipe is just venting into the loft itself.

Also the exhaust fan is approx 6 feet high from the bathrooms ceiling and there is a bend in the pipe of approx 60 degrees, and then after another foot or so, the fan sits.

I'm just enquiring if this is in anyway cited as good practice, or is the workmanship poor?

share|improve this question

marked as duplicate by Niall C., Steven, Chris Cudmore, ChrisF Apr 6 '13 at 12:17

This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.

2 Answers 2

The exhaust fan for the bathroom humidity should not empty out into interior space. That defeats the purpose of it. Most systems are installed with the fan in the hole cutout and then ducting to exhaust that hot humid air outside.

share|improve this answer

Bad, bad, bad.

Mold will be in evidence shortly in the loft (attic), as we go into warmer weather.

The vent must run to the exterior, either through a gable wall or through the roof. Its easier to properly down-slope to the gable wall (to eliminate any condensation in the vent pipe.

To reduce pipe condensation (either inside or outside of pipe), a jacket of insulation is suggested. Also suggested is smooth walled pipe, gradual turns and no screw penetrations into the vent airspace.

share|improve this answer
1  
+1 Even though it is agreed this is a terrible practice, it is apparently a quite common practice. The more I hear about it, the angrier I get. I imagine a special unpleasant place for people that do bad things because no one can easily see it. –  bcworkz Apr 4 '13 at 20:38
    
Integrity is what you do when no one is looking. I wish I could publish a bath where this happened. I had to take down 3/4 of the ceiling (it wasn't discovered until the mold ate through the drywall) and of course, replaced the sodden insulation. –  HerrBag Apr 4 '13 at 21:44

Not the answer you're looking for? Browse other questions tagged or ask your own question.