No! You don't have to use drywall tape. There are some better options and alternatives. Tape in Mud is a tapeless solution for drywall finishing.
Drywall tape serves a single purpose: To help make the seams invisible. That it! Drywall tape does not offer an mechanical strength at all. If you skipped the drywall tape and just used joint compound to fill in the seams, the seams would become visible again after the compound dried. Joint compound shrinks!
Yes. All places where 2 sheets of drywall meet should be taped and muded. If you don't use tape you risk the joint cracking.
Yes you need to tape them. If you just fill the seams with mud sooner or later there will be a crack and then you will have to tape it to fix it. Better to do it right the first time - even if it takes longer.
After taping and smoothing drywall, wait one day to allow the mixture to dry overnight. Next, lightly sand off any bumps before applying another coat of mud. Go easy with the sanding at this point to avoid abrading the drywall tape paper.
Advantages of Mesh Tape
Self-Adhesive: Mesh drywall tape doesn't need joint compound added before applying, making application quicker than paper tape. Resistant to mold: Mesh tape is ideal for moist environments where mold can grow.
Tape in Mud is a tapeless solution for drywall finishing. Instead of applying drywall tape to the joints, they mix special fibers in the mud and apply the fiber reinforced mud to the joints directly. It's really easy to use and saves about 40% of labor time.
Assessment of Hole Size
Before starting your DIY repair project, measure the size of the hole to determine the method and materials needed. For holes smaller than 4 inches, you can typically use joint compound or spackle with drywall tape.
You've just painted your wall and now that it's dry, you can see the drywall tape showing through it. Chances are, if you can see the tape, mistakes were made when the paint was originally applied.
Drywall tape is a crucial element of any repair to drywall because it offers the necessary reinforcement and stops the drywall from deteriorating. Since there are many kinds of drywall on the market, determining the correct type of drywall tape isn't always straightforward.
Tape the flat joints before the corners
Spread the compound, and place the tape. Spread the joint compound at least 1/8 in. thick over the length of the joint. Starting in the corner, carefully place the tape on the surface of the compound over the joint.
It makes the job go faster, prevents popping and cracking, and reduces noise. Glues can be messy, cost more than fasteners alone, and are difficult to remove. Alternatives are drywall nails and screws, furring strips, and combining adhesives with fasteners.
Yes, tape is necessary (unless your patch is less than about 4" on a side). If it's not used you'll probably see hairline cracks around your patch within a year or two. Houses move. The trick is that any tape joint should be feathered out 8-12 inches in each direction.
Lay on the tape and embed it with a light stroke of your knife, leaving no more than about 1/16 inch of mud under the tape. Apply a thin second layer of mud over the tape. Lightly stroke down each side to taper the extra mud away from the center.
You can fill a hole up to about 1/2-inch with spackle. Larger holes unsupported by a backer tend to collapse.
Drywall is not a fan of moisture. When you skip taping, those seams become open invitations for moisture to seep in. This can lead to mold growth, warping, and, in severe cases, structural damage. So, if you enjoy dry walls, keep them dry—tape them up!
Moisture Resilience: Mesh Drywall Tape
Mesh tape holds up better against moisture and mold than its paper counterpart, making it the optimal choice for damp areas such as kitchens and bathrooms.
A wall should look smooth and unified. It shouldn't show seams, or places where one sheet of drywall meets another. If it does show seams, it's a sign that the job was rushed or incomplete, or an inadequate job was done with drywall tape and/or drywall compound — a bad drywall mud job, in other words.
Paper tape is always preferred in the angles(corners). Because if you use mesh tape in the angles they will tend to get rounded. Where the paper tape has a crease in it and conforms better to the square corner.
There's no need to pre-wet paper tape. Number one - you can't run wet tape through an automatic taper. Number two - it just makes it mushy and want to tear. And take forever to dry.
The downsides of mesh tape, though, are that it is much more difficult to apply by hand (it can easily get crooked without an applicator and needs a different, special applicator for inside corners) and that you'll need to finish it with setting-type compound (rather than standard compound), so you'll need some extra ...