Yes, all vertical drywall joints must be supported by a stud or solid backing. Failing to support your seams will cause the drywall to flex. This movement will inevitably cause the joint compound to crack and the tape to peel, resulting in failed repairs.
1) My first rule is to try and avoid having any butted seams. This is done by using longer lengths of drywall. Rooms 16 feet or under should not have any butted seams. I do mostly residential jobs where the walls are traditionally hung horizontally, so if a wall is over 16 ft long it will have butted seams.
Avoiding Common Drywall Plastering and Taping Mistakes for a Professional Finish
Screwing directly into drywall without an anchor provides virtually no holding strength. The screw will quickly sag, strip the hole, and eventually pull completely out under the slightest weight, leaving an ugly, widened hole in your wall.
One of the most immediate and obvious consequences of forgoing drywall tape is the appearance of visible seams and cracks. You'll have uneven, unsightly lines running across your wall that will make even the most forgiving paint job look terrible.
Two common mistakes made during drywalling are improper joint compound application (such as applying it too thickly or not feathering the edges), and failing to stagger the seams across different studs, which weakens the wall and increases the risk of cracking.
Some drywall finishers add a small amount of dish soap (like Dawn) to drywall mud as a workability hack. They do this to act as a surfactant, which reduces the surface tension of the mud.
A bare screw or nail in hollow drywall with no anchors should not be trusted to hold more than 5 to 10 pounds. Because gypsum board is brittle, a heavier load will likely cause the fastener to strip, tear the drywall, and fall out.
Nails are a favorite for large jobs in construction because they're cheaper than screws and offer shear strength — or the ability to withstand shear pressure, where two surfaces slide past each other.
Yes, but you should never screw directly into empty drywall for anything weighing more than a few ounces. Drywall is soft gypsum; threads cannot grip it, and the screw will easily pull out, leaving a hole.
Yes, you should apply a layer of mud (joint compound) over the tape immediately. This step, known as “embedding” or “bedding” the tape, ensures there are no air bubbles and that it bonds securely to the wall.
Common Signs of a Bad Drywall Job
Visible seams or joint lines: You shouldn't be able to see where one drywall sheet ends and the next begins. If seams are showing through paint or primer, it likely means the taping and mudding were rushed or done unevenly. Uneven corners: Corners should be crisp and consistent.
Over time, breathing the dust from drywall joint compounds may cause persistent throat and airway irritation, coughing, phlegm production, and breathing difficulties similar to asthma.
Vertical joints in drywall are also called "butt joints." Always leave a 1/2-inch gap at the floor. This allows for floor and wall expansion without cracking the drywall. It also helps prevents moisture wicking if the floor floods.
For the majority of projects, paper tape is considered better because it offers superior tensile strength, resists cracking, and folds perfectly into corners. However, mesh tape is preferred for quick patches because it is self-adhesive and easy for beginners to use.
Assuming your drywall subcontractor was working towards level 4 or level 5 finish, below are some signs of a poor installation:
Nails are generally recommended over screws for several reasons. Structural nails, such as galvanised nails or stainless-steel nails, are specifically designed for use with joist hangers. They provide the necessary shear strength to support heavy loads and resist the forces acting on the joist.
Common Wood Framing Mistakes
Bad Luck:
In many cultures, it's believed that cutting nails inside the home can bring bad luck.
Any item over 20 pounds is too heavy for bare drywall without specialized supports. Drywall is brittle, so relying on nails or screws directly into it without anchors risks cracking the gypsum board or having the item rip out of the wall.
Signs You Need to Replace Your Drywall
Yes, you can mount a 75-inch TV on drywall. However, because 75-inch TVs weigh roughly 60 to 100 pounds, you cannot rely on standard plastic anchors. You must either anchor directly into structural wood or metal studs, or use heavy-duty hardware specifically rated for hollow walls to prevent the TV from pulling down the drywall.
An orbital sander is an option for a large drywall project. This tool is lightweight and can perform the task in less time, but as a power tool it must be used carefully to avoid damaging the drywall surface. Use fine grit sandpaper, between 150 and 180 grit, to achieve the desired results.
Plaster is rarely used in modern construction primarily because drywall (gypsum board) is faster, significantly cheaper, and easier to install. While plaster is highly durable and offers better soundproofing and fire resistance, traditional multi-coat plastering requires highly skilled labor and lengthy drying times, making it inefficient for modern housing demands.
Apply a layer of drywall mud to the seam first, then press drywall tape into the wet compound. Use a putty knife to smooth the tape, remove air bubbles and ensure strong adhesion before applying additional coats of mud.