Repairing drywall

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Posted by: from Mercier
4/11/2014 at 4:11:20 PM


So my question is: How would you repair an inside corner where there was roughly a 2x3ft hole cut out at the bottom on both walls?

Thank you for your time!

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Date/Time4/11/2014 at 5:45:33 PM

If you have to ask you need a pro.

I would charge $4-600 minimum depending on how far do you live, how soon you need it. Cheaper if I can do it as a fill in job. To bring it to paint ready, add $150-200/ wall plus the paint and baseboard cost if you want to never know the holes were there..

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Date/Time4/11/2014 at 6:34:44 PM

In GTA area minimum charge to do job like that is $500. 2 days job repair because the plaster need dry to sand and paint.

Manny the handy man

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Date/Time4/11/2014 at 9:34:46 PM


I'll give you the answer to your question.

First you cut a piece of drywall to fit in the left hand side. Screw it into the studs with drywall screws. (be care full there are no electrical wires or anything else to hit with the screws.

Then cut and fit the piece for the right side and install it the same way. use self sticking mesh tape on all of the edges.

Then apply the first coat of mud "plaster" with a corner plaster trowel on the inside corner. Let it dry over night. Apply a second thin coat to be sure the inside corner is finished properly. Let it dry.

Then using a flat plaster trowel apply plaster to all the other areas of tape. And carefully seam the edge of the plaster to the drywall from the plaster you applied to the corner.

Let everything dry, then sand. you will see where you need a second coat. Do this, let it dry then sand again. If everything looks good prime, if not touch up the plaster and let dry and sand again.

Hope that helps.

James Fram

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Chris from FC Construction in Milton
Date/Time4/13/2014 at 8:58:03 PM

While applying mud make sure to use a bigger/wider mud knife with each coat that way you are over lapping each edge as you go along. This will help you to achieve a better finish, remember fan the mud out don't be afraid to make it 8 - 12" wide.

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Date/Time4/17/2014 at 8:28:30 PM


If there are no studs you can screw into, just cut a piece of plywood to fit in behind the drywall to use as a backing for your joints. Those joints like to crack, so use that plywood backing at all the joints.

As for the muding, if you're not very good at it, just use the fiber tape. Don't sand it until after at least 3 coats, or you'll probably sand into your tape. Use a lot of mud, and make wide passes. At the corner, that fiber tape works well, if u get an inside corner muding knife.

It's never a bad idea to go on youtube and watch someone do it too. They have videos showing how to do everything on there.

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Date/Time4/18/2014 at 10:22:17 AM

Thank you for your question. Assuming the existing framing is still in tact, install new drywall to cut out area. Before purchasing new drywall you need to measure the thickness of the existing drywall and determine whether it is 1/4,3/8,1/2,or 5/8 inch thickness. Then cut pieces to fit each side and install using drywall fasteners. Pre-fill joint seams with a bond 20 ,let dry, then using an all purpose pre-mix drywall compound apply to both sides of corner first with a 3 or 4 inch drywall knife, then apply paper drywall tape to corner after creasing the tape and then apply over the wet drywall compound. Corner tape should be tapered at least 1 ft past the butt seam. Wipe out excess compound one side at a time using the same knife.Then apply compound to the flat seams and apply paper tape over wet drywall compound then wipe out smooth. Fiber tape not recommended here because it will likely crack shortly after you paint it. After taping all seams,let dry. Then apply drywall compound to seams with a 4x12 trowel using at least 2-4 applications,allowing to dry between each application. Use a 3 or 4 inch drywall knife to apply compound to the corner one side at a time. Once you determine seams are smooth and flat enough then sand with a fine sponge block sander to smooth finish. Vacuum dust then apply primer, after primer dries apply 2 coats of finish paint. If you use Benjamin Moore Aura "bath n spa" paint you can avoid using primer. Re-install baseboard, paint and its good as new.

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