Had to reframe aournd door openings and now in the process of applying drywall around the smaller openings. The walls have already been painted (eggshell in the game room and semi gloss in the bathroom. Do i need to prep the painted walls prior to taping the joints?
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Sand lightly to remove the gloss, and give the new mud a place to bite.
"When asked if you can do something, tell'em "Why certainly I can", then get busy and find a way to do it." T. Roosevelt
I agree with the sand lightly comment.
But also, you may have drywall joints that do not have a factory edge. If so, you might want to take a rasp or a knife and cut away some of the paper so that when you tape the joint, you are not building it up higher than the surrounding area. A jagged edge hides the joint better than a straight one. By jagged edge, I mean rip the paper in a jagged pattern, not cut all the drywall jagged.
There is also a tool that makes butt joints into tapered ones. It is not a device that you put behind and it pulls down the two edges, like a butt blocker, but instead reforms the edges into a tapered edge. It works great and is called a Butt-Taper. You can find them at Butt-Taper.com or All Wall.
http://www.butttaper.com/video.htm
I gotta say, that looks like a sweet tool!
I wish I could part with $189 for only occasional use though.Rebuilding my home in Cypress, CA
Also a CRX fanatic!
It does work great. It also works on patches which the other back blocker systems cannot do. It also is a one time purchase since it doesn't become part of the wall like the other systems. I like that it saves a lot of time and material and makes a dead flat wall for countertops and cabinets to abut to.The prices have gone up, but if you have a whole house to remodel, it should be worth it to you.And no, I don't have any affiliation with the company. Just a cool tool I came across and use.
You sir are eeeeeviiiiiiilll. Talking me into making a smart tool purchace - SHEESH!Rebuilding my home in Cypress, CA
Also a CRX fanatic!
I hope I am not talking you into anything. Just that you are recognizing a good thing when you see it and are taking appropriate action. If it works for you, go for it. If not, pass.I have two. One complete set and one extra tool. The set stays with my drywall kit for the big jobs and the tool rides in my truck for the occasional patch.Once you try it, you will be amazed at how well it works and how good the joint is. Just remember to use setting type compound or "hot mud" .I have had to break apart set walls that I used this on and the joints are very tough, much tougher than standard bevel joints and very flat.Kirk