MDF stand question
Planted Tank Forums
Your Tanks Image Hosting *Tank Tracker * Plant Profiles Fish Profiles Planted Tank Guide Photo Gallery Articles

Go Back   The Planted Tank Forum > Specific Aspects of a Planted Tank > DIY


Reply
 
Thread Tools Display Modes
Old 06-18-2014, 01:11 PM   #1
Xenaph
Planted Member
 
PTrader: (0/0%)
Join Date: Dec 2013
Location: Quebec
Posts: 171
Default

MDF stand question


Hi,

i built a 2x4 stand as the structure as you can see there.

I precut all piece of MDF sheet.

Do i need to paint before inside sheet at all piece or only a outside sheet is necessary for water proof ?

Thank
Attached Thumbnails
Click image for larger version

Name:	meuble.jpg
Views:	230
Size:	56.6 KB
ID:	334642  

Xenaph is offline   Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
Old 06-18-2014, 02:13 PM   #2
paronaram
Algae Grower
 
PTrader: (11/100%)
Join Date: Jun 2009
Location: Staten Island, NY
Posts: 103
Default

I don't know much about about painting MDF, but I see that you have absolutely awesome cat, is it Bengal?
paronaram is offline   Reply With Quote Quick reply to this message
Old 06-18-2014, 02:21 PM   #3
Xenaph
Planted Member
 
PTrader: (0/0%)
Join Date: Dec 2013
Location: Quebec
Posts: 171
Default

Ah, no it a Savannah F4 SBT. He is 4,5 months old.
Xenaph is offline   Reply With Quote Quick reply to this message
Old 06-18-2014, 02:31 PM   #4
Squiner
Algae Grower
 
PTrader: (0/0%)
Join Date: Dec 2013
Location: Bel Air, MD
Posts: 30
Default

Double post. ..
Squiner is offline   Reply With Quote Quick reply to this message
Old 06-18-2014, 02:32 PM   #5
Squiner
Algae Grower
 
PTrader: (0/0%)
Join Date: Dec 2013
Location: Bel Air, MD
Posts: 30
Default

I would absolutely paint the mdf before installing on the stand. MDF loves to absorb moisture and you want to ensure is well sealed.
Squiner is offline   Reply With Quote Quick reply to this message
Old 06-18-2014, 02:48 PM   #6
GraphicGr8s
Pixel Prestidigitator
 
GraphicGr8s's Avatar
 
PTrader: (10/100%)
Join Date: Apr 2011
Location: West coast of the east coast of the USA.
Posts: 2,775
Default

Paint won't make MDF waterproof at all. It will protect it a little. Water is not a friend to MDF. I would paint all sides of the MDF. In fact since you have the paint I'd so the 2 x 4s also. Why not? It will look a lot better than raw wood. I'd do it before I assembled anymore of it. Right now everything is easy to get to.

Any wood should have the same surface on all six sides. Helps mitigate moisture variances to an extent.
__________________
Recedite, plebes! Gero rem imperialem.
Quote me as saying I was misquoted.
Once you get rid of integrity the rest is a piece of cake.
Here's to our wives and sweethearts - may they never meet.
If you agreed with me we'd both be right.
GraphicGr8s is offline   Reply With Quote Quick reply to this message
Old 06-18-2014, 03:32 PM   #7
plaakapong
Planted Tank Obsessed
 
plaakapong's Avatar
 
PTrader: (0/0%)
Join Date: Feb 2008
Location: Bellingham, Wa.
Posts: 357
Default

"Paint won't make MDF waterproof at all."

Sure it will. If it's done properly. Prime and paint multiple coats so it's completely sealed - all sides/edges. As long as it remains sealed it will be fine, but it only takes a deep scratch to turn it into a sponge.
plaakapong is offline   Reply With Quote Quick reply to this message
Old 06-18-2014, 05:01 PM   #8
Bushkill
Wannabe Guru
 
PTrader: (1/100%)
Join Date: Feb 2012
Location: Bushkill, Pa
Posts: 1,339
Default

" but it only takes a deep scratch to turn it into a sponge. "

So it "can" become a painted sponge. In the end, it's just not the material of choice in humid or wet applications. It's biggest claims to fame is relative stability and ease of finishing; meaning it won't shrink and swell wildly the way open-cell woods like pine do and it's a snap to paint. But it's just a matter of time before it develops some break in whatever coating is applied to it and you're done.

I just bought a set of the metal shelving units that Lowe's sells touting 1,000 lb per shelf capacity. I replaced the MDF shelves with 3/4" plywood. The MDF shelves have a really interesting coating. Not paint, yet not epoxy. I stood them on end in the driveway until I could haul them away. In the ensuing monsoons that came that week, I have to say I'm impressed with whatever they coated that MDF with. It appears to be pretty tough and waterproof.........except at the uncoated edges. They didn't even sit in a puddle and were barely making ground contact on the gravel. The bottoms of the panels swelled to 4 times the panels' thickness about 2 inches up. But the rest of it was relatively unaffected by about 6 inches of rain.
__________________
Angelo

"Why can't my wife see all of this stuff as an investment?"
Bushkill is online now   Reply With Quote Quick reply to this message
Old 06-18-2014, 06:47 PM   #9
GraphicGr8s
Pixel Prestidigitator
 
GraphicGr8s's Avatar
 
PTrader: (10/100%)
Join Date: Apr 2011
Location: West coast of the east coast of the USA.
Posts: 2,775
Default

I've seen laminate covered MDF swell. MDO however is about waterproof. It's what signmakers use for their outdoor signs. I'll stand by what I said.
__________________
Recedite, plebes! Gero rem imperialem.
Quote me as saying I was misquoted.
Once you get rid of integrity the rest is a piece of cake.
Here's to our wives and sweethearts - may they never meet.
If you agreed with me we'd both be right.
GraphicGr8s is offline   Reply With Quote Quick reply to this message
Old 06-18-2014, 07:00 PM   #10
gus6464
Wannabe Guru
 
PTrader: (7/100%)
Join Date: Dec 2011
Location: San Diego, CA
Posts: 1,600
Default

MDF is like a sponge when you paint it. It would take so many coats to even try to get it sealed it's not worth it. Can't you do something like oak ply for the face? A 1/2in sheet at HD of oak ply is about the same price as MDF.
gus6464 is offline   Reply With Quote Quick reply to this message
Old 06-18-2014, 09:20 PM   #11
Xenaph
Planted Member
 
PTrader: (0/0%)
Join Date: Dec 2013
Location: Quebec
Posts: 171
Default

I painted with a seal two coats inside and side, nothing outside. I will screw on the 2x4 and give another two or three coats outside side. After that, i will paint in grey or green mat.

About paint the 2x4, i want but i'm in apartment and it hard to do this.

It my first time with MDF, maybe next time i will take plywood.

@all panel is already cut.
Xenaph is offline   Reply With Quote Quick reply to this message
Old 06-18-2014, 09:22 PM   #12
Squiner
Algae Grower
 
PTrader: (0/0%)
Join Date: Dec 2013
Location: Bel Air, MD
Posts: 30
Default

If you use a couple layers of good oil base paint, you'll be fine. You may scratch the outside of the stand but it's not like you've got tons of water continuously being exposed to the exterior.

Just be careful when moving equipment on the inside and touch it up if it gets scratched. I never have much water spillage inside my stand that houses a 55 gal sump. I used particle board as a base to my stand with a couple coats of rustoleum oil base paint. Particle board is not known to be great with moisture either.

I would never use MDF as a hood material since that's continuously humid.
Squiner is offline   Reply With Quote Quick reply to this message
Old 06-19-2014, 01:25 AM   #13
Hoppy
Planted Tank Guru
 
Hoppy's Avatar
 
PTrader: (75/100%)
Join Date: Dec 2005
Location: Sacramento, CA
Posts: 18,975
Default

Quote:
Originally Posted by Squiner View Post
If you use a couple layers of good oil base paint, you'll be fine. You may scratch the outside of the stand but it's not like you've got tons of water continuously being exposed to the exterior.

Just be careful when moving equipment on the inside and touch it up if it gets scratched. I never have much water spillage inside my stand that houses a 55 gal sump. I used particle board as a base to my stand with a couple coats of rustoleum oil base paint. Particle board is not known to be great with moisture either.

I would never use MDF as a hood material since that's continuously humid.
I have used MDF as a hood material, the 1/4" thickness. It worked fine, no swelling at all. Apparently there are different standards for MDF in different areas of the country. MDF here is almost waterproof. I have left scraps out on the ground over our wet winter season, and when I cleaned up the pile the next summer, there was no swelling of the scraps. I even used a couple of long thin scraps as stakes for tomato plants. They went through the summer with no problems at all, and were soaked daily when the bed was watered, plus one end was down in the ground.

Particle board and Masonite do swell badly and quickly when exposed to water. But, "wood" siding is now made of MDF as are many standard moldings, made for exterior use. I assume that in other areas MDF is a completely different material.
__________________
Hoppy
Hoppy is offline   Reply With Quote Quick reply to this message
Old 06-19-2014, 02:23 AM   #14
plaakapong
Planted Tank Obsessed
 
plaakapong's Avatar
 
PTrader: (0/0%)
Join Date: Feb 2008
Location: Bellingham, Wa.
Posts: 357
Default

" I have to say I'm impressed with whatever they coated that MDF with"
Vinyl, melamine?? There are many coatings and grades. Some of it very good.

" Apparently there are different standards for MDF in different areas"

It varies from mill to mill. There's also High Density Fiberboard, HDF. It's about density and glue content. I've seen a lot of different grades but never anything like you described Hoppy. Good stuff!

It's true mdf isn't first choice for areas where water is present, but the surfaces on an aquarium stand are vertical and will not be holding water. With a good paint job it should be fine. Keep it sealed!
plaakapong is offline   Reply With Quote Quick reply to this message
Old 06-20-2014, 02:44 AM   #15
PhysicsDude55
Algae Grower
 
PhysicsDude55's Avatar
 
PTrader: (0/0%)
Join Date: Oct 2011
Location: Dallas, TX
Posts: 145
Default

I personally would not use MDF for a stand.

But to answer the original question, it is much better to paint the MDF AFTER assembling it.

I've done both ways. If you pre-paint, than the separate pieces look funny, and the paint "sandwiched" inbetween pieces of mdf is redundant and can affect fitment.

Giving a few heavy coats of paint after its assembled hides the joint lines, and will provide a better overall finish and product. And it will help create one uniform somewhat waterproof coat
PhysicsDude55 is offline   Reply With Quote Quick reply to this message
Reply

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the The Planted Tank Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:

Log-in

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.



Thread Tools
Display Modes

Posting Rules
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT. The time now is 10:58 PM.


Powered by vBulletin®
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Copyright Planted Tank LLC 2012