I am moving into a townhouse i bought. It is about 20 years. So the building code at that time didn't require bathrooms to have fans. I want to put them in.

So I will have to hire a roofer to open up 2 holes on the roof.

I have some questions.

1) when they open up the roof, the location should be approximately closer to the bathrooms right?

2) Is it necessary to install Roof Flashing? Because the roofer told me on the phone that they are going to open up the roof, put a cover in and seal it with water proof materials. Is that how it is done normally?

3) Anything else that I should be aware of?

Please advise.


Thanks

 

That should be fine. Make sure you get a high CFM fan. Don't go cheap. I had two in a handicapped bath that I built for my father, one over the shower & one over the toilet. They were really quiet & they each had a light.

 

There is no flashing used. The roof vent comes with it's own "flashing".
Broan RVK1A Broan - NuTone Roof Vent Kit No Finish - eFaucets.com
It needs to look like this if he does it right.
roof vent pictures - Bing Images
If there's no metal exposed at the bottom of the vent it's wrong.
That part needs to be sitting on top of the shingles not under them.

 

If there is an association involved with your townhouse be sure they approve of your project, in advance.

Bud

 

The sound fans make is called sone. The lower the number the quieter it is.
It can go from a cheap fan sounding like a jet engine to so quiet you do not know it's on.
The fan needs to be sized according to the sq. footage of the room.
How to Size a Bathroom Ventilation Fan · BathroomFanExperts.com