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-   -   Mudding Finish Is Showing on Final Coat (http://www.diychatroom.com/f4/mudding-finish-showing-final-coat-6991/)

Hages 03-09-2007 07:04 AM

Mudding Finish Is Showing on Final Coat
 
Hi,

New construction bathroom wall painting:

1. PVA primered(Glidden) the walls one coat with airless spray(515tip) then back rolled(1/4" nap) it.
2. Three coats of semi-gloss white(Glidden) with a 1/4" nap roller.

Sighting along the wall, I can see the texture differences with the sheetrock and the smoother mudding finish on the reflection.:eek:

The mud had been sanded fine, but the paper texture of the sheetrock is also coming thru too!

What do you guys think?

Primer was too thin?
Should I use a 3/8" nap instead to fix the problem? Is it a semi-gloss issue?

What should I do for the other rooms? And how to fix the problem with the bathroom I just painted?

TIA!:yes:

slickshift 03-09-2007 08:00 AM

Well,
The semi-gloss isn't helping
The extremely small nap isn't helping
And the paint isn't helping
And truthfully, it sounds like the primer isn't sealing that good either

With semi-gloss, the surface does need to be almost perfect
Semi-gloss shows imperfections more than flatter sheens

The nap is extremely small
I recommend a 1/2" nap myself
An absolute bare minimum of 3/8"

Also the roller sleeve quality makes a big difference
I'd recommend a 50/50 poly/wool
Or at least a Purdy White Dove

You don't mention which Glidden you used (there are different lines), but I was un-impressed with the product when last using it a few years ago
I would not use it again, nor recommend it

I don't use PVAs, but to me it sounds like the product may not be sealing well


To address the problem, I'd lightly scuff sand (a sanding screen on pole would be best and a good investment if you have more rooms), wipe clean (a dry-type swiffer on a stick works well and quickly), and coat with Ben Moore Regal line paint or Sherwin Williams premium quality line (not their "contractor" or Mid-grades) using a 1/2" (or at least 3/8") wool, 50/50, or White Dove roller sleeves

KUIPORNG 03-09-2007 09:15 AM

I read from book that, if you are going to use gloss paint, you need to skim coat the whole wall... as there is always texture difference between the paper surface of drywall and the mud surface... no matter how smooth you sand it... it always show on gloss paint... so skim coat the whole wall with diluted mud is necessary.

Hages 03-09-2007 09:51 AM

Thanks for the responses. I am learning alot.

The Gliddens are 5 gallon "Contractor" grade stuff. I guess you get what you paid for!

I will go with a quality 3/8" nap and go over the painted walls with yet another coat of paint, and go more better grade paint in the future.

I figured it was smooth wall and a 1/4" would be acceptable since I like the smoother finish than the more textured look of the longer naps.

Maybe I can get away with the 1/4" nap with the lower sheens(eggshell, flat). Seemed the ceilings were not affected.

Thanks for the wisdom!

slickshift 03-09-2007 12:50 PM

Yeah the "contractor" grade stuff will show much more of anything on the walls

Believe it or not the size of the nap has less to do with the "stipple" left on the walls than the leveling characteristics of the paint (another reason to go with better paint) and the quality of the roller sleeve (another reason to go with quality roller sleeves)

Anyway, you should be able to get a match to the color from Ben Moore or Sherwin Williams should you decide to put another coat on

joewho 03-09-2007 01:50 PM

See below.

Bump.

joewho 03-19-2007 09:43 PM

Bump.
Edited original post.

IMO, go over it with a 1/2" roller. The drywall, where there is no mud, is a certain "smoothness". The sandpaper used on the mud is a different "smoothness" and probably contributes to your problem.
Using a heavier nap roller will help with this problem.

Hages 03-19-2007 10:09 PM

Quote:

Originally Posted by joewho (Post 37614)
Bump.
Edited original post.

IMO, go over it with a 1/2" roller. The drywall, where there is no mud, is a certain "smoothness". The sandpaper used on the mud is a different "smoothness" and probably contributes to your problem.
Using a heavier nap roller will help with this problem.

To solve the problem this is what I've done:
On new drywall, the pva primer causes the paper fibers to lift and has a scratchier feel to it. I go over with the screen-type drywall sand "paper" to get it smoother then go with a flat paint over the whole wall. Finally a semi-gloss coat with 1/2" nap and the texture is even now!

Skim coating is basically what I am doing with the flat paint and less messier than the skim coating joint compound method.

Thanks for the responses! :thumbsup:


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