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What Is Plaster Made Of?

Plaster is one of the most commonly used materials when it comes to building construction. It’s a crucial component that’s incorporated in coating walls, ceilings as well as partitions and it hardens on drying. Plastering is one of the most ancient building materials which has taken over mud to plaster reed or sapling huts so as to serve as a protection against the elements. Here, we’re going to take a look at the multiple compositions of plaster. These components are very important due to the fact that they form a protective coating on whatever they are used on. They work to protect surfaces such as ceiling and underlying walls from scratches or any form of damage.

Plaster comprises a few materials which includes gypsum, lime or cement and all operates in a similar way. Gypsum is made of calcium sulfate dihydrate and it’s the main component of main forms of plaster, sidewalk chalk, blackboard, drywall and more. Meanwhile, lime plaster is made up of sand, water and lime ( mostly non hydraulic hydrated lime). And lastly, cement which is a mix of suitable plaster, portland cement, sand as well as water.

The plaster is usually produced as a dry powder which is mixed thoroughly with water to create a stiff but also a paste that’s workable immediately before it’s applied to the wall or ceiling.

It’s quite easy to confuse a drywall with a plaster but there are some differences. Not only is plaster a much older style of wall construction than dry wall, but it’s also a lot more expensive than installing a drywall. Plaster walls are also able to provide you with a more durable finish when compared to a drywall and it makes for a better quality finish.

Artex was originally made using white asbestos to make it stronger. However, this stopped in the mid-1980s, and the use of asbestos was banned in the UK in 1999, due to its extreme health risks. So, any artex you buy today won’t contain asbestos.

If you have an artex ceiling or wall that was created before 1999, it may have asbestos in it. This won’t be a health hazard if you leave it undisturbed, so it’s not necessary to remove it. However, if you want to get rid of or alter your artex ceiling or wall, you must get it tested to check if it has asbestos in or not first. If it does, you’ll need to hire a qualified professional to work on it.

Also referred to as drywall, plasterboard is a panel that features an inner layer of gypsum and spread between facer as well as backer paper. It is mostly incorporated in the construction of both interior walls and ceilings. Plasterboard can be made to be humidity resistant, fire resistant as well as noise resistant. Due to these reasons and also the fact that it’s very easy to install and very affordable, plasterboard is a very popular choice when it comes to interior walls and ceilings.

One of the major issues that most homeowners face when fitting plasterboard is the thickness required to make the project a long lasting one. But not to worry, we got you covered! If you’re about to install plasterboard for your ceiling and wondering the thickness that’ll be appropriate, then you’ve come to the right place. In general, the standard plasterboard sheet size is 120 cm in width and within the range of 180 cm to 360 cm in height. These sizes are designed to provide the much needed support to the standard stud spacing which is 160 cm. Depending on the manufacturer, plasterboard can be in four different widths.

Now talking about the thickness, there are two standard thicknesses of plasterboard - 9.5 mm and 12.5 mm. The sizes of plasterboard for ceilings are 9.5 mm or 10 mm. Most individuals tend to assume that the thicker the plasterboard the better, but this is absolutely false. A thicker plasterboard will only stick harder to the ceiling which will make it hard to seal joints if required.

Plasterboards are a great noise insulators which can also reduce disturbances from other activities. As a result, for walls, size of plasterboards that’s considered appropriate for walls is 12.5 mm or 13 mm.

It’s possible to paint your artex ceiling if you want to smarten it up or make it a different colour.

If it’s never been painted before, you’ll need to paint it with a PVA-based solution or water-thinned paint layer to start with. You may want to scrape or sand off any loose or peeling patches beforehand, but only do this if you’re sure that the artex doesn’t contain any asbestos.

Once you’ve done this, follow with two coats of your paint of choice – ideally an emulsion. If your artex ceiling has been painted before then you can paint directly without priming. However, if you’re painting over a particularly bold colour with a lighter one, you might want apply a layer of white paint first.

Can You Plaster Over Artex?

The short and simple answer to this question is yes, you can plaster over Artex. However, you must also note that plastering over Artex may not be the best choice as Artex is porous and as such, you’d have to detach the stripping so as to get a smooth and even coating. In the event whereby your ceilings or walls have Artex on them, you’ll have to smooth the Artex in order to obtain a plaster of solid coat.

✓ Preparing Artex for plastering. First and foremost, you’ll have to detach any bumps before you can plaster over the Artex. Do note that you don’t have to completely remove the Artex, all that’s needed is just enough to get a coat of plaster. Make use of a scraper to get rid of the bumps on various Artex designs like swirl and bark. Once you’re through getting rid of as much bumps as possible, there’s the need to seal the Artex due to the fact that it can absorb the moisture out of the plaster which will cut the time to get a good finish to little or nothing. You can use a PVA and water mix to do the job!

✓ The PVA mix. This is done to seal off the porous Artex in order to stop it from absorbing moisture from your plaster which can make it start to crack and crumble. To do this, simply mix half PVA and half water, then use a brush to paint the mixture over the plastering area. Once done, you can give the plastering surface about two to three coats and wait for the solution to dry off within a hour or two.

Plastering over Artex is not as hard as it seems, but if you lack the confidence to complete the task, simply contact a professional for help.

Can You Plaster Over WallPaper?

If you have wallpaper installed on your wall surface and you’re considering plastering the wall, when you put into consideration the stress involved in removing a wallpaper you may want to consider plastering directly over the wallpaper. This is quite understandable as removing a wallpaper can be quite time consuming and tedious, but plastering directly over wallpaper is a mistake that should never be made. Plastering over wallpaper is in no way a viable option due to the fact that it can only turn out disastrous after a couple of weeks or even days in some cases as the plaster will crack and crumble. As a result, you’ll have to firstly scrape off the wallpaper in order to assist the plaster get to be firmly secured to the wall behind.

When you plaster over a wallpaper, this will make the wallpaper wet and it’ll absorb the moisture. And once the plaster does not have moisture, the only result is for it to crack and start to crumble. Hence, plaster and wallpaper is never a good combination.

Asides from cracking and crumbling, anther issue is that the wallpaper will bubble. You can actually key the wallpaper with the help of a knife and it might look secured for some time, however it’ll eventually crumble and you’d have to scrape off the plaster complete to start all over again. The wallpaper will bubble as the plaster can’t be keyed into a wallpaper and the wallpaper will only work as a barrier between the plaster and the wall.

Overall, plaster always needs to slowly dry off as well as a good and proper surface to grip to. No matter the amount of PVA mix you spread on the wallpaper, it will always remain a barrier. So you’d have to remove the wallpaper completely to get a great result.

Artex is a type of interior surface coating, similar to plaster. It’s used to create decorative textured finishes on ceilings and walls, so it takes longer to dry than plaster.

Artex is actually a brand name, but it’s used to refer to similar products made by other manufacturers too. It was particularly popular in the 1970s, but is still used to create attractive wall and ceiling finishes today.

Installing a plasterboard to a ceiling is not the easiest of tasks, and even though it can be done by one person, it’s usually a lot easier when done by two people. If you’re an experienced DIYer, this task becomes a lot easier to undertake, with both confidence and patience needed to ensure a successful outcome. If you lack these essential attributes, we’d strongly recommend you call in a reliable professional who can guarantee the best results for help. In this guide, we’re going to take you through the processes involved to plasterboard your ceiling. Let’s take a look!

✓ Take a measurement of your ceiling. Knowing the length and width of your room is crucial here. You have nothing to worry about if it’s not a perfect square as that’ll only mean more cutting.

✓ Make the necessary plasterboard cuts. Cut the plasterboard sheet with a utility knife in accordance to ceiling space measured.

✓ Remove existing plaster. Once done, examine the trusses and beams to ensure they’re still in a great condition before you proceed. Also, make sure there’s no loose plaster that can compromise your new installation.

✓ Apply construction adhesive. For a better fit, you’d have to apply adhesive along the beams while also avoiding the edges as this could affect your screw placement.

✓ Start in a level corner. You have to start the installation from the most level corner.

✓ Work along the outside edges. Secure it using a screw along the outside edge. This will make your plasterboard held to your ceiling perfectly. It won’t bend or break as your proceed with the installation.

✓ Complete the installation. Install the plasterboard on your entire ceiling and complete the installation by taping the seams and plastering for a smooth surface.