Strange Lines. - Paint Talk - Professional Painting Contractors Forum
CLICK HERE AND JOIN OUR COMMUNITY TODAY, IT'S FREE!
Go Back   Paint Talk - Professional Painting Contractors Forum > Painting Forum > General Painting Discussion

Reply
 
Thread Tools Display Modes
Old 04-29-2009, 06:51 PM   #1
 
Join Date: Apr 2009
Posts: 1
Rewards Points: 10
Thanks: 0
Thanked 0 Times in 0 Posts
View seanhutch's Photo Album My Photos
Default Strange Lines.

I went to quote an interior job and found something I had never seen before. All the painted drywall on exterior walls only had floor to ceiling lines every 16 inches. It was obvious to me these were the studs. Also on these lines were screw head size dots every 15 inches or so which I assume are the drywall screws. The client had in some places wiped with a damp cloth and the discoloration comes off like a layer of soot. I was wondering if anyone has seen this before and may know what it is caused by.
Sean.
seanhutch is offline   Reply With Quote

Warning: The topics covered on this site include activities in which there exists the potential for serious injury or death. PaintTalk.com DOES NOT guarantee the accuracy or completeness of any information contained on this site. Always use proper safety precaution and reference reliable outside sources before attempting any construction or remodeling task!

Sponsored Links
Advertisement
 
Old 04-29-2009, 07:14 PM   #2
Senior Member
 
JNLP's Avatar
 
Join Date: Dec 2007
Location: PA
Posts: 2,384
Rewards Points: 1,000
Thanks: 491
Thanked 325 Times in 202 Posts
View JNLP's Photo Album My Photos
Default

Look around this thread?
https://www.painttalk.com/f2/metals-s...-drywall-4763/
JNLP is offline   Reply With Quote
Old 04-30-2009, 12:14 AM   #3
Go Cardinals!!!
 
DelW's Avatar
 
Join Date: Apr 2007
Location: Pekin, IL
Posts: 145
Rewards Points: 75
Thanks: 0
Thanked 7 Times in 2 Posts
View DelW's Photo Album My Photos
Default

Yup, its called "Ghosting" Here is something I copied(can't remember from where) when I ran into the same problem a few years back. hope it helps.


Ghosting
Ghosting is a phenomenon that is generally seen during the winter months. Ghosting can be identified as dark lines on the drywall of ceilings and walls that outline the wall studs or the ceiling joists inside the living space. Even though insulation is installed between the joists themselves are exposed to the cold winter temperatures in the attic. Since the wood joists are not effective insulators, they act as thermal bridges. Consequently, the temperature at the underside of each joist (attached to the drywall) is lower than the adjacent sections of the drywall that are covered with insulation bats. The lower temperature along the bottom of the joists encourages the formation of microscopic condensation. Over time, the moisture will trap dust particles hat show up as shadow lines that outline the wood joists or studs.
To prevent ghosting, install insulation bats over the exposed ceiling joists. Ideally, the insulation should fill the spaces between the joists and cover the tops of the joists as well. The same holds true for the stud spaces; however, the fix would be more difficult.
__________________
There are 2 types of scuba divers. Those that pee in their wetsuits and those that lie and say they don't.
DelW is offline   Reply With Quote
Reply

Tags
None

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not 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
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Ceiling Lines RCP Surface Preparation and Application 83 05-16-2010 01:09 PM
Really Strange... Wolfgang Off Topic (Non Trade) 24 03-27-2009 12:14 AM
Strange anomaly on the index page TooledUp Off Topic (Non Trade) 7 02-09-2009 03:17 AM
Strange Picture richiemcdon Off Topic (Non Trade) 9 03-13-2008 12:32 AM


All times are GMT -4. The time now is 09:03 PM.


Powered by vBulletin® Version 3.8.8
Copyright ©2000 - 2019, vBulletin Solutions, Inc.
Content Relevant URLs by vBSEO 3.6.1
vBulletin Security provided by vBSecurity v2.2.2 (Pro) - vBulletin Mods & Addons Copyright © 2019 DragonByte Technologies Ltd.
User Alert System provided by Advanced User Tagging (Pro) - vBulletin Mods & Addons Copyright © 2019 DragonByte Technologies Ltd.
Our Pro Sites Network
ContractorTalk.com | DrywallTalk.com | ElectricianTalk.com | HVACSite.com | PlumbingZone.com | RoofingTalk.com