Bathroom renovation question

I would not do that unless it's a real full-blown attic. Even then, something doesn't seem right about that. My landlord here is the city building inspector and he has about 30 certifications in construction and related stuff. I'll ask him if I catch him today or tomorrow.

Venting any exhaust fan into an attic space can cause moisture issues in the attic. Obviously a bathroom exhaust fan would potentially dump a ton of moist air into the attic. I suggest either a wall mount unit that will vent directly through the wall if the bathroom is on an exterior wall or a ceiling mount that vents through a flex hose to the eave.

Not to mention the risk of explosion, if some of those EXHAUST gasses, were to get ingited.

Just think about it.

N

Blowing warm moist air into a cool place is a great way to make a mold factory. Seems like Tom Silva or Mike Holmes are up in somebodies attic fixing that mistake about every week.

O.K., bad idea. Thank you for your restraint:-) I'm going to look into a wall mount unit.

Thanks again,

Don

Yes, what everybody else said....must be vented outside....mine go's outside to vent in soffit (eve), even then you may have the problem of flex tube running from vent to exhaust fan accumulate water inside the tube, thus causing freezing, thus causing the vent tube to rip, thus causing moisture in attic or rafters, thus causing mold...thence more money to fix....

You could tie into another vent pipe or chimney that goes thru the roof already.

You wild need to install a one way flapper on each pipe before the union to avoid gases to back flow from one unit to another.

Cutting a hole in the roof is not that big of a deal if you have asphalt shingles. It's pretty simple to do.

Cut your hole, slip the vent cap under the shingles and use some Henry's.

Go here....

John Bridge Tile Forum

These guys have taken me through 3 bath renos. Similar to this site, but VERY neophyte
friendly. Just type in your problem in the search area or post a question...bingo. Answers within minutes sometimes!
Any of you considering a bathroom project should bookmark it, twice.

BTW I vented my last bath through the soffit, the vent faces down and is under the eave, nowhere for water to get in. Not too tough. Use foil tape, not duct tape. Duct tape is good for a lot, just not ducts!!
DO NOT VENT INTO YOUR ATTIC.

Ditto Dave's remarks about asphalt shingles. I've done a couple of vents -- one for a bathroom and one for a dryer -- with no leaks in over 10 years. It's pretty simple.

Off topic note to Don: Ever since you switched from the handle Prior Commitment to your real name, I've thought that your real calling was in computer tech support. Your last name -- Blame User -- sounds like it's custom-made for an IT support guy.

Thanks Jim, you crack me up...

There is no problem with venting through the roof. In fact, most bathroom and kitchen exhaust fans are vented through the roof, unless it is not logistically possible during a retro-fit. Only improper installation or improper product usage causes problems. Proper installation will always ensure there is no water leaks from the roof jacks and if you use the proper exhaust vent pipe and roof jack combo you should not have any worries about moisture leakage into the attic.

Moisture in the attic is never caused by too much moisture off-gasing into the roof from exhaust vent pipes passing through the attic and exiting through the roof, but rather improper circulation of mass air flow in the attic, i.e. no or incorrect sizes of soffit vents or roof vents.

AS3

People do tend to see that breakdown of my name when they see it written. My wife uses that when she tells people how to spell it because the pronounciation is not anything you could ever guess: Bla- ma-shur. I'm sure it's a mispronounciation of the German, which I'm told means "Blue Cat." Pretty cool, huh?

As far as the tech support, now that is funny if you've ever seen some of my stone cold basic questions to Wendell about the most simple matters:-)

Don

I would go through the wall if possible but through the roof if necessary. Either option is better than attics. Personally, I like to keep the roof in one piece and avoid things like skylights, multiple stink pipe penetrations, vent pipes, etc. In my climate I have heard of attic vented bathroom fan outlets accumulating a HUGE amount of ice buildup during the winter months.

Also, I like the thin wall 4" PVC rather than the corrugated metal pipe that you stretch out, though sometimes it is necessary to use the corrugated stuff for tight spots. I also avoid any sags in the pipe and if possible, but a slight downhill pitch to the outlet to avoid water build-up

First house I purchased was brand new and had a terrible problem with moisture in the attic. The bathroom "met" code at the time because there was a small window in the shower enclosure that could vent outside when it was opened. But the access panel for the attic was in the sink part of the bathroom and an amazing amount of moisture was seeping into the attic around that panel. I finally figured out what was going on and had a real vent put in (through the roof). I didn't do that myself.

Also I had an attic vent put in that would come on automatically at a certain humidity or temp. It really helped with cooling in the summer and moisture-mainly in the winter. Newer houses that are so well insulated have little air flow need to be set up to get air and moisture out so vents in the roof are just part of the deal. That house I had was under vented so the extra attic vent was needed. I had actual water leaks in the ceiling just from the moisture seeping around the closed access panel.

Off-topic.

Wow, I was certain that was a made-up handle. I had thought about suggesting that you change it to something meaning "blame-the-computer" or blamemachine. Interesting real name.;-)

bla-ma-shur

Is that first a like the a in cat or the au in caught? Emphasis on the first syllable?

bla-ma-shur

> Is that first a like the a in cat or the au in caught? Emphasis on the first syllable?

Bla as in au; emphasis on the first syllable, yes

Don

bla-ma-shur

Thanks. BTW, Cow rhymes with bow.