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Installing bathroom cabinets- finishing #4812112
07/12/18 10:27 AM
07/12/18 10:27 AM
Joined: Feb 2018
Posts: 60
FLORIDA
Walmill Offline OP
Walmill  Offline OP

Joined: Feb 2018
Posts: 60
FLORIDA
This is a question that stems partly from laziness, saving waste, and saving time.

I have some unfinished cabinets that I am going to install in the bathroom. Is it necessary, important, or even recommended to finish the back/sides/inside of cabinets? This is not for aesthetics but for potential protection. Can't seem to obtain an answer on google.

Last edited by Walmill; 07/12/18 10:28 AM.

1994 f150, 4.9L, E4OD, RWD. 194XXX miles
2016 Hyundai elantra value edition 21000 miles
Re: Installing bathroom cabinets- finishing [Re: Walmill] #4812141
07/12/18 10:51 AM
07/12/18 10:51 AM
Joined: Aug 2011
Posts: 3,501
Chicago,IL,USA
pandus13 Offline
pandus13  Offline

Joined: Aug 2011
Posts: 3,501
Chicago,IL,USA
[off-topic]
Have your exhaust fan wired in parallel to a humidistat + on/off switch.

You control humidity, you have less expanse/mold/mildew problems...
[/off-topic]


16 Golf SportWagen
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08 Yaris
04 Elantra
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Re: Installing bathroom cabinets- finishing [Re: Walmill] #4812164
07/12/18 11:06 AM
07/12/18 11:06 AM
Joined: Dec 2014
Posts: 1,400
California
Vuflanovsky Online content
Vuflanovsky  Online Content

Joined: Dec 2014
Posts: 1,400
California
You might have to clarify their location. My bathroom could have cabinets that are subject to steam/humidity or ones that are outside the toilet/shower area and separated by a door.

Re: Installing bathroom cabinets- finishing [Re: pandus13] #4812168
07/12/18 11:09 AM
07/12/18 11:09 AM
Joined: Jan 2017
Posts: 2,553
VW Fanboy Island
maxdustington Offline
maxdustington  Offline

Joined: Jan 2017
Posts: 2,553
VW Fanboy Island
Originally Posted By: pandus13
[off-topic]
Have your exhaust fan wired in parallel to a humidistat + on/off switch.

You control humidity, you have less expanse/mold/mildew problems...
[/off-topic]

They have fans now that are moisture sensing, and if you are going to install a switch make sure it has timer functions. Honestly, bathroom mold problems seem to be related to poor construction and lack of waterproofing in shower/tub areas. Cold basement three piece baths without windows compounds this.

It depends on the material. MDF is very sensitive to moisture, if it gets scratched it will swell in the area and look bad. Melamine seems to be relatively water resistant, not as bad as MDF.

A coat of primer on all exterior sides is probably enough. I would do a decent job painting the inside because you are going to be looking at it all the time.


03 Jetta AWP/09A 205k kms
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Re: Installing bathroom cabinets- finishing [Re: Walmill] #4812193
07/12/18 11:31 AM
07/12/18 11:31 AM
Joined: Feb 2018
Posts: 60
FLORIDA
Walmill Offline OP
Walmill  Offline OP

Joined: Feb 2018
Posts: 60
FLORIDA
-Good idea on the exhaust fan.

-Cabinets are in the bathroom with a shower nearby. Three cabinets, two sinks. Approx 3 feet from shower. One cabinet against exterior wall.

-Florida, tend to get rather humid.

-Cabinets are solid wood, don't know what wood just off the top of my head. Backing cover about 1/8 inch engineered kind of product, name escapes me right now. Counter to be solid stone.

-1990ish house, not as weather/energy efficient as a modern house, but not a sieve either. Have had occasionaly mildew here and there, but no widespread problems.


Last edited by Walmill; 07/12/18 11:31 AM.

1994 f150, 4.9L, E4OD, RWD. 194XXX miles
2016 Hyundai elantra value edition 21000 miles
Re: Installing bathroom cabinets- finishing [Re: Walmill] #4812201
07/12/18 11:40 AM
07/12/18 11:40 AM
Joined: Aug 2011
Posts: 3,501
Chicago,IL,USA
pandus13 Offline
pandus13  Offline

Joined: Aug 2011
Posts: 3,501
Chicago,IL,USA
Wallmill/OP,

General finishes makes some gel stain. it can be used as wipe-on regular stain or just plain painted as an oil paint(self level), then some poly/varnish on top.

Also , put some vinyl sheet on the bottom of the cabinets, rolled around on 3 sides (left, right and back) to protect from the spills or liquid accumulation.
I think homedepot/lowes has some cabinet protectors for this.

Also for the exhaust fan, make sure it has enough CFM/flow for the bathroom's area. Panasonic fans have good name in the industry.

Re: MaxDustington: pretty good knowledge for a young guy. Keep it going, be a PRO, and you will retire on your own terms. Hat off!


16 Golf SportWagen
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Re: Installing bathroom cabinets- finishing [Re: Walmill] #4812264
07/12/18 01:14 PM
07/12/18 01:14 PM
Joined: Mar 2011
Posts: 318
NM, USA
pkunk Offline
pkunk  Offline

Joined: Mar 2011
Posts: 318
NM, USA
Wood, of any kind, once finished on one side should be finished on the other side as well as any exposed edges. This is to prevent moisture from entering and causing the panel to warp.
In the case of a cabinet, it also makes it easier to clean.


8200 ft elevation in the Sangre de Cristos
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Re: Installing bathroom cabinets- finishing [Re: Walmill] #4812294
07/12/18 01:42 PM
07/12/18 01:42 PM
Joined: Jan 2009
Posts: 2,543
wi
dave123 Offline
dave123  Offline

Joined: Jan 2009
Posts: 2,543
wi
Wood finishing for 25+ years and supply OEM cabint and custom builders in bathroom answer is yes yes yes including bottoms and tops of entrance door if also doin Conversion Varnish is recommended for this app.

Re: Installing bathroom cabinets- finishing [Re: Walmill] #4812342
07/12/18 02:56 PM
07/12/18 02:56 PM
Joined: May 2012
Posts: 2,466
The land of USA-made Subies!
SubieRubyRoo Offline
SubieRubyRoo  Offline

Joined: May 2012
Posts: 2,466
The land of USA-made Subies!
What about on wood that has dried for 20+ years? My friend gave me some black walnut planks that were done with the bark intact (that live-edge stuff) and it dried in barn for over 20 years. I ran it through the planer a couple times to flatten it out, and my wife wants me to turn it into a shelf. Do I still need to worry about warping after the long drying times and planing afterwards, and what should I use to leave the most natural finish? Do I need to worry about sealing the bark edge?

Re: Installing bathroom cabinets- finishing [Re: SubieRubyRoo] #4812418
07/12/18 04:00 PM
07/12/18 04:00 PM
Joined: Jan 2009
Posts: 2,543
wi
dave123 Offline
dave123  Offline

Joined: Jan 2009
Posts: 2,543
wi
Originally Posted By: SubieRubyRoo
What about on wood that has dried for 20+ years? My friend gave me some black walnut planks that were done with the bark intact (that live-edge stuff) and it dried in barn for over 20 years. I ran it through the planer a couple times to flatten it out, and my wife wants me to turn it into a shelf. Do I still need to worry about warping after the long drying times and planing afterwards, and what should I use to leave the most natural finish? Do I need to worry about sealing the bark edge?
if it was my own because of the unique nature of the woodI have materials not available to general diy guy but I would give a recommendation or look into Tung oil for this job for the diy person.

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