taping a corner where plaster meets drywall

arnold4321February 27, 2010

I have a crack along the ceiling of a bedroom where a plaster wall meets a drywall ceiling. The crack was there when I moved into the house a few months ago. Looks like whoever taped the joint didn't do it right, but I'm not sure what they did wrong.

What's the best way to tape an inside corner where plaster meets drywall? Will paper tape work on plaster? Obviously it will work on the drywall side.

Are there any other products I should consider that will fill the crack and let me sand & paint over top? The crack is about 1/16 wide and about 15 feet long.

Thanks!

Thank you for reporting this comment. Undo
sombreuil_mongrel

I always spray, roll or brush a bonding agent (Link or Plasterweld) into cracks or old plaster edges before taping. I embed the tape (paper for corners) in a setting-type compound, like Durabond 90 (sets in 90 mins or less). So the second coat can go on the same day. For second coats you can use another setting-type compound, Easysand (setting time @ 90, 45, etc), or regular green-lid drywall mud. Finishing touches with regular mud, for ease of sanding. Since it's a ceiling corner, it would be all right to use the dust-reduced type of mud, which I do not recommend for general work as it is very soft, but at a ceiling it wouldn't see any rough handling. It could, of course, all be done with ordinary green-lid mud, but I have had a great track record with durabond for old plaster repairs.
Casey

    Bookmark   February 27, 2010 at 2:16PM
Thank you for reporting this comment. Undo
PRO
Christopher Nelson Wallcovering and Painting

I have been told that fiberglass tape is better for a plaster and drywall joint.I would do all else exactly as sombreuil posted.

    Bookmark   February 28, 2010 at 5:27AM
Thank you for reporting this comment. Undo
brickeyee

The biggest problem with joining to old plaster is that it sucks moisture out of the compound so rapidly the setting compounds do not set correctly, and the pre-mixed mud does not stick to it very well, even with e bonding agent.

I use a bonding agent to cover large ares of old plaster, but getting it into a crack is so hit or miss it is rarely worth the trouble.

If you dampen the old plaster then wipe off any surface water after about 5 minutes the new setting compound will not get sucked dry and will set up properly.

For a small crack a hand spray bottle set to create a narrow spray (almost a stream) to get into the crack works well.

    Bookmark   February 28, 2010 at 11:33AM
Sign Up to comment
More Discussions
Pocket door questions
I am considering a butler's pantry/scullery addition...
rockybird
Small bath remodel - problem tub size
I could use some advice. We decided it is high time...
thomis
Popcorn Ceiling Removal...Is it worth it?
I have read many of the posts regarding Popcorn Ceilings...
cudjoegal
need help designing shed dormers
we bought an 1864 post and beam house and want to add...
lisafromvermont
Structural Engineer - What do I need to Know?
I'm planning a kitchen gut/remodel in my three-story,...
Carrie B
Sponsored Products
InvisiLED 24V 100W Class 2 Plug-In Transformer by WAC Lighting
| Lumens
Flexbrite Ultra Warm White 75-Foot LED Rope Light Kit
Lamps Plus
Reel Waterproof RGB ColorChase LED Strip Light
EnvironmentalLights.com
Serena & Lily Organic Cotton Crib Skirt
Serena & Lily
Mylight.Me Other Lighting 10 ft. LED Flex Strip Adjustable Timer Motion
$59.99 | Home Depot
Linea Single Shower Dispenser
$49.50 | FRONTGATE
ECR4KIDS Hardwood Tape Dispenser with 10 Assortment Tape Rolls - ELR-0359
$75.00 | Hayneedle
Painted Medallion Jewel Outdoor Pillow
$139.00 | FRONTGATE
People viewed this after searching for:
© 2015 Houzz Inc. Houzz® The new way to design your home™