How To Plaster An Existing Wall LIKE A PRO

Any house building or remodelling project must include wall plastering because it creates a durable, smooth surface that you may enjoy for many years. Also, plastering walls requires skill and precise execution. Your walls get a robust, even, and long-lasting finish when you plaster them. A well-plastered room also makes an excellent paint foundation, helps soundproof a space, and maintains the integrity of older walls.

The type of plaster required and its application technique will depend on the kind of wall and surface you wish to plaster. Plastering a new wall or plasterboard, for instance, differs from plastering ancient masonry or an already-existing wall. While little plastering jobs or "touch-ups" can be completed by you, it's better to leave larger walls and rooms to an expert. But it doesn't mean you can't prepare the space and restore ancient brickwork to save money on your own.

Steps To Plaster An Existing Wall LIKE A PRO

To ensure that the old walls are suitable for wall plastering, additional preparation work is frequently needed before plastering walls as part of a renovation project.

Set Up The Space:

• Clear the space, cover the carpets, and cover everything that can't be taken out of the room before your plasterer starts.


• Make sure the road to the water source doesn't travel through your entire house without dragging plaster and dirt—your plasterer will need access to a water supply.


• It is generally easier for plasterers to plaster to a height of an inch or two above the floor rather than painting to the top of the baseboards, therefore remove the existing baseboards before plastering. Even though it takes longer, most plasterers should be able to plaster up to the existing baseboards if you choose to keep them in place.

Get Your Walls Ready:

• You must prepare your walls before painting old plaster walls with a fresh coat of paint.


• The old crumbling and broken plaster on the walls has to be removed before the brickwork below is cleaned.


• After removing any outdated wallpaper, use an adhesive, like a diluted PVA solution. An alternative would be to use a product that has tiny grains that resemble sand and attach to the wall, providing a great foundation for a fresh layer of plaster.


• Apply a plaster primer directly onto the wall surfaces.

Your plasterer can directly apply a base coat when it has dried.

Wall Plastering In A New Construction

A new home or expansion requires a different method of wall plastering than a renovation. Plaster can be applied directly to the gypsum board in new construction.

Here's how to plaster a freshly constructed wall:

• Tape the joints between the boards after countersink the gypsum board's screw heads.


• To get a clean finish at the exterior corners, metal angles should be utilized. Putting on a coat of plaster


• A layer of scratch plaster, or sand and cement plaster, should be applied to all block walls that are going to be plastered.


• To establish a strong basis for the subsequent coat, which is placed while the first scratch coat is still green but not completely dry, let this coat cure before rubbing it in a swirling motion.


• To level and fill in any voids and imperfections in the wall, apply these two coats.


• Applying the finishing plaster at this stage involves the expert plasterer determining if the plaster has adequately dried.

This is essentially the final surface of your new home's walls and ceilings, therefore it should be flawless and devoid of any faults or spackle marks.

Several Brand-New Homes Have No Wall Plastering At All

These are often internal walls or stud walls, although occasionally plasterboard is used to cover the inner surfaces of external walls before painting or wallpapering them; in this case, there is no plaster base.

Undoubtedly, the primary cause of this is the expense. Plasterers are thus not needed. Rather, the spaces between the boards are taped (scrim) and the screw holes are filled. After using a joint compound, you're ready to go.

We refer to this procedure as "tape and jointing."

Although this approach is less expensive than plastering, caution is needed since if the plasterboard gets too wet, it will weaken and if you're not careful, it may easily get damaged on the paper surface.

Can Plaster Be Applied Straight To A Brick Wall?

Even though it is less common these days, plastering straight onto old bricks or blocks is nevertheless occasionally required. This is typically done as a "touch-up" rather than on the entire wall, on tiny areas of the wall where bits of the old plaster have come away.

These walls need to be examined, and if needed, repaired. New wall plastering will not be tolerated over crumbling, ancient brickwork. For this reason, you must complete the following tasks before you may begin plastering:

• Using a wire brush, the surface of the ancient stonework needs to be removed.


• Then, to match the previous masonry's thickness, a layer of bonding, sometimes known as browning, a material akin to plaster, is put.


• A plasterer can then completely remove the surface.

Wet Plastering

The cost and difficulty of wall plastering increased before the development of the plasterboard. Still, some people favoured "wet plastering," or plastering directly over unplastered blocks or masonry to increase soundproofing.

This procedure involves trowelling cement plaster or gypsum foundation, sometimes known as a scratch coat, directly onto the brickwork, followed by a thin priming layer. Wet wall plastering has the drawback of being more prone to cracking and taking a lot longer to dry than a thin layer on plasterboard.

Plastering Over Plasterboard Will Save You Money And Time

Since only a base coat is needed, plastering over gypsum board is sometimes a simpler and less expensive alternative when remodelling than leaving the masonry unplastered. Furthermore, gypsum board may be fastened to bare walls using screws and wooden laths, allowing for the installation of an insulating layer as needed.

Gypsum boards can also be "dabbed" onto bare walls in certain situations. This entails using adhesive strips to attach tiny sheets of gypsum board to the wall. You may save your plasterer money and time by cutting the plasterboard yourself. You can use a hand saw.

Plasterboard can also be attached to the wall by you. The simplest method is to screw them straight into the wooden battens that are fastened to the ceiling and wall.

Before the plasterer removes the boards, the seams between them need to be covered with fabric tape.

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