Bathroom Remodel Questions

Bob Mariani

these are pretty basic and I suspect whatever is available at your local tile supplier will be fine.

Vikeologist

does it matter if it is water based or not?

also, can I install the new fan into the old ceiling, then gut the entire bathroom, that way I will have a working fan during the remodel process, or is it best to wait until the new drywall is installed?

Bob Mariani

I would wait. Maybe use a window fan to exhaust during construction. Water based is fine.

Vikeologist

I was just reading the instalation manual for my broan bathroom fan and they recommend using regular duct instead of flex duct.

I already bought the flex duct, will it still be ok to use the flex duct? I will have a run of about 8-10 feet to the roof

Bob Mariani

It is okay just not as good as the steel duct. The flex has more resistance. 10 foot is close to the limit to be effective.

Vikeologist

so you think I should use regular duct instead? I would then have to insulate it myself.

Bob Mariani

no you should use flex duct first for about 12" then tie to a 4" round 90 ell then up through the roof with 4" round metal pipe. The flex isolates the fan's vibrations. The 90 ell keeps any water entering the duct from outside the ability to get into the bathroom. The duct seems should then be sealed with metal duct tape and insulated.

Vikeologist

do you think my 150 CFM fan will be too big for my bathroom...

the bathroom is 10 feet long, and where the tub is the width of the room is 8 feet, but the rest of the room is only 5 feet wide...does it hurt to have your fan oversized?

sorry for all the stupid questions lol, but this is my first DIY project in my house, and I want to do it right

Bob Mariani

it will not hurt to be oversized

LeviDIY

Bob - I assume the invoice is in the mail? This thread is a nice back and forth

Bob Mariani

Too broke now to buy new invoice forms.

Vikeologist

OK next question...

What kind of primer and paint should I use in the bathroom? I want something that is really mold and mildew resistant.

Also, do I use a different kind for the ceiling vs. the walls?

Bob Mariani

Use Zinsser's Perma White. The same paint is used for the primer and both top coats. It will give the most protection since the mildicide is an active ingredient in the paint the continues to migrate to the surface continuing to kill mold and mildew longer than any other solution. You can have it tinted to any color you want. Use the same for the ceiling and walls.

Gary in WA

"the bathroom is 10 feet long, and where the tub is the width of the room is 8 feet, but the rest of the room is only 5 feet wide...does it hurt to have your fan oversized?" ----- It is about twice as big: http://www.efi.org/factoids/bathroom_sizing.html
It may hurt your pocket book pulling twice as much conditioned air from the house. You might want to shorten the bathroom clearance under the door or the higher negative pressure created will pull supply air from the crawl space (stinky) or attic space (scratchy) from the shower pipe hole and sink pipes. LOL It will strain if not enough air supply which taxes it and could shorten its life.

As Bob said on the flex ducting, try not to use it for over 2' runs. Use one size bigger diameter than equal straight pipe. (2-10 times higher pressure loss). A lot more surface area to collect water from vapor exiting. (especially if not expanded) http://rockwallcontrols.com/Resident...ag=air-ducting http://www.mmmfg.com/pdfs/True_Cost_...x_10-27-06.pdf
Be safe, Gary

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Vikeologist

My local lumber yard did not have any moisture resistant or greenboard drywall, so I had to get regular drywall...

I am very worried this will cause problems later with mold and mildew. Will I be ok using regular drywall in my bathroom, or did I make a major mistake...

we already have the ceilings up with regular drywall