I used fiberglass tape and regular drywall compound . Initially the finish was good but later ridges developed in the paint along the taped line. I understand now that perhaps I should have use setting compound initially. However, how do I repair the current problem?
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Replies
Give it another coat of two of regular mud right over the paint.
It happened because regular drywall compound shrinks as it sets. Another coat (or maybe 2) is all you really need.
In a different thread, 9 out of 10 pro drywallers chose paper tape over FG.
Who wants to do 3 coats?
Who wants to do 3 coats?
Maybe someone who wants to do a good job?
junk
I don't remember the thread, fibreglas done right is no problem. Paper is my pref. but, I've use fibreglas with excellent results. Not a pro drywaller, but have worked with them and am a pro remodeler.
The results are what counts, and how you get there is just part of the scheme.
edit: take that back, am a pro drywaller. Just know when to call a better one.
and they use Fiberglas, except when using a banjo.
What kind of mud did you use for the bedding coat? My guess is it didn't cure before you put the next coat on. The guys I watch, use hot mud for bedding the tape and then finish with joint compound.
Yeah, "hot mud" doesn't
Yeah, "hot mud" doesn't shrink (as much) as it sets, so it will not "reveal" the fiberglass texture as much as regular mud.
What is hot mud exactly.
gm
Dry chemical setting joint compound. Durabond, Easysand are two USG products.
Plaster of paris would be another kind.
Durhams rock hard water putty.
If you've used those, you'd know the temperature change (hot) that goes on as it "kicks". These harden w/o the water needing to dry off. They shrink less and in the case of the Durabond/POP/Durhams-they dry harder than bucket mud.
The joint compound dry powders are rated to "time". Roughly the working time of the mixed up compound. 20, 45, 90 are common.
For example:
http://www.usg.com/sheetrock-durabond-setting-type-joint-compound.html
Fiberglass tape
I recommend not using fiberglass tape. I used it in the 80's briefly and noticed that tiny fissures developed when it was used. I've never had this issue before with paper tape. If your concerned with mold issues and don't want to use paper tape then I'd suggest using a product from Fiba Tape called Fiba Fuse drywall joint tape. It's a glass mat tape and so far so good since I've been using it.
user
What did you first coat that fibreglas tape with?