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Old 11-04-2009, 06:13 PM   #1
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Default Spraying new drywall

Are there any drywall primers out there that won't furr up the drywall when spraying?

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Old 11-04-2009, 06:35 PM   #2
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Default Back Roll

You have to back roll the primer to not let it fur up

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Old 11-04-2009, 06:52 PM   #3
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Quote:
Originally Posted by cullybear
You have to back roll the primer to not let it fur up
Pretty much, yeah
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Old 11-04-2009, 07:25 PM   #4
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Ive had it fur up when I rolled the primer on not just back rolled. Its from the drywall guy over sanding the paper area right outside the mud. Just sand after priming doesnt take long. I use the radius 360 sander that SW sells now as its alot easier to control then the standard rectangle sander and it goes from pole to pole easy.
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Old 11-04-2009, 07:44 PM   #5
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Back rolling will help you get the results you are looking for.
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Old 11-04-2009, 08:42 PM   #6
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What about a Prep coat material?
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Old 11-04-2009, 08:56 PM   #7
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Backrolling works as long as the paper is not oversanded, as Capital said. I have it when some drywallers gets the new porter cable power drywall sander. It seems to ensure oversanding. We had one house a couple years back where I think they had sanding half the drywall portion. That was not fun to sand out.
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Old 11-04-2009, 09:00 PM   #8
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When I sand my drywall I usually use a porter cable attached to a vaccuum. Then I do go over it again with a 360 for flex-edge, and make sure its sanded good. After I get a broom, and gently sweep excess dust off the walls. Some people even use a damp floor mop or floor sponge, and dampen the walls a little. Spray primer, then quickly sanding. Sanding in-between coats is a must!
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Old 11-05-2009, 02:02 AM   #9
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I bet elastomerics would cover it up because its so thick or maybe peelbond, thats thick too!

vvvv What this guys says though vvvvv is good advice.

Quote:
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Ive had it fur up when I rolled the primer on not just back rolled. Its from the drywall guy over sanding the paper area right outside the mud. Just sand after priming doesnt take long. I use the radius 360 sander that SW sells now as its alot easier to control then the standard rectangle sander and it goes from pole to pole easy.
I dust with the Wooster dust eater, that thing is BOSS!
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Old 11-05-2009, 08:05 AM   #10
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Originally Posted by tsunamicontract View Post
I bet elastomerics would cover it up because its so thick or maybe peelbond, thats thick too!

vvvv What this guys says though vvvvv is good advice.



I dust with the Wooster dust eater, that thing is BOSS!
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Old 11-05-2009, 06:45 PM   #11
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Quote:
Originally Posted by DeanV
Backrolling works as long as the paper is not oversanded...
True that
Over-sanding the paper can be a problem also
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Old 11-06-2009, 11:41 AM   #12
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I just sand after priming.
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Old 11-08-2009, 09:36 PM   #13
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Quote:
Originally Posted by bunny View Post
Are there any drywall primers out there that won't furr up the drywall when spraying?
Realy, its not the primer, its the dust. Drywallers use the porta-cable, I have three of em. Yes, I know that they fur up the paper, but thats the way it is, asking a drywaller not to use em would be like asking you to brush paint everything, no rollers, no airless. Things are the way they are.

Before you go into the RIGHT way to do stuff, we live in a world where we do what the market prescribes. When I paint em after drywalling em, I brush the wall with a broom, then spray and back-roll the primer, then sand between each coat. Problem solved. No primer will fix the problem by itself, its not the paint, its the dust and trying to get by without rolling or sanding.

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Old 11-08-2009, 10:42 PM   #14
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Answer to original question is NO. And another comment, its not dust that causes that. Have you seen how an airless blows dust off the floor when you shoot walls. Thats not dust capn, its paper, its torn, scuffed paper that causes that. I've put a lot into researching this exact topic.

Not sure about you guys but when I pour a handful of drywall dust into water, it dissolves. And, when you shoot primer on CLEAN drywall simply hung without sanding or mud, it produces that fuzziness.
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Old 11-08-2009, 11:16 PM   #15
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Do we get an apple now?

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Old 11-08-2009, 11:41 PM   #16
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Take your pick
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Old 11-09-2009, 08:07 PM   #17
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Quote:
Originally Posted by jack pauhl View Post
Answer to original question is NO. And another comment, its not dust that causes that. Have you seen how an airless blows dust off the floor when you shoot walls. Thats not dust capn, its paper, its torn, scuffed paper that causes that. I've put a lot into researching this exact topic.

Not sure about you guys but when I pour a handful of drywall dust into water, it dissolves. And, when you shoot primer on CLEAN drywall simply hung without sanding or mud, it produces that fuzziness.
Respectfully sir, your wrong. an airless "freezes" or "captures" everything on the wall, including the DUST, but back-rolling it will "melt" it back into the paint. If it were not so, why do we sand between coats?

I don't mean to start a kick=fest, but I do understand drywall, a bunch
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Old 09-07-2011, 11:22 PM   #18
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I know this is an old post but wanted to bring this subject up again
its definately not dust. Why would there only be dust on the paper and not the taped areas?
The paper has been scored and its raises up when its painted I had a large room recently. I sprayed one area and in another area I sprayed and backrolled the primer. Same result. All the papered areas were like 80 grit sandpaper Sanding the crap out of it still left a texture which is very visible when looking down the wall It wont pass QC on government jobs
I did two large test areas after sanding, spray and backroll and straight spray The issue is still noticable
The taper is saying its my fault because I sprayed it ,he does not know I rolled 70% of the room
The taper needs to skim the rough textured areas to smooth it out IMO
The GC is having a N.A.C.E qualified inspector to come in and resolve the issue Will keep you advised
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Old 09-07-2011, 11:36 PM   #19
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Quote:
Originally Posted by torpainter View Post
I know this is an old post but wanted to bring this subject up again
its definately not dust. Why would there only be dust on the paper and not the taped areas?
The paper has been scored and its raises up when its painted I had a large room recently. I sprayed one area and in another area I sprayed and backrolled the primer. Same result. All the papered areas were like 80 grit sandpaper Sanding the crap out of it still left a texture which is very visible when looking down the wall It wont pass QC on government jobs
I did two large test areas after sanding, spray and backroll and straight spray The issue is still noticable
The taper is saying its my fault because I sprayed it ,he does not know I rolled 70% of the room
The taper needs to skim the rough textured areas to smooth it out IMO
The GC is having a N.A.C.E qualified inspector to come in and resolve the issue Will keep you advised
Its not dust, Do not listen to that BS. Understand that the surface of drywall is different between board types and companies. We see phases of the same board go through batches of nice board vs not so nice. So you have variations in board surfaces and paints and primers will behave differently over them.

Some of these drywall guys are using muds that don't sand to feather easy so they over-sand to feather to paper which destroys the surface paper.

Grab yourself a magnifying glass and look at some board types when they are bare.

If I can see a photo of it I can tell you whats going on. Some drywallers leave tell tale signs of their destruction. There are so damn many stupid myths about painting a book can be written. Some people have no damn clue what they're looking at.
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Old 09-08-2011, 05:36 AM   #20
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All I know is that drywall is always rough after priming. That's why I always sand it after priming.

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