This job was done in St Helens Tasmania, on a 150 year old house. The room here was full of what we call crazy cracks through out the whole ceiling. It was not an option to re-sheet the ceiling as the owner wanted to keep the heritage style of the building, which is fair enough as it is a very old residence.
What we did here was to dig out any cracks that were big enough to do so, the small hairlines do not need this. Then once dug out we trowelled them back up with cornice cement to set hard again.
After the dug out cracks were set hard again all the cracks were then taped with a fibreglass joint taped called FibaFuse. The cracks were then given another coat of base and then a final coat of topping to allow for sanding.
As you can see the entire ceiling was nearly trowelled, as myself and the owner had a few jokes about, but this is what was needed to be done to maintain this lovely 150 year old buildings heritage. #ceilingcracks
This is a rondo suspended ceiling on a raked angle from 3m down to 2.5m. Because usually 10ml plasterboard is used in residential housing, these metal battens, called furring channels are spaced at a maximum 450ml centres to comply with Australian Safety Standards. The blue colour board you can see in the background is for the bathroom, it is called “wetboard”, and is commonly used in any wet environments.
This is the finished sanded product. The angle you are looking at now between the wall and ceiling junctions was created using an adjustable PVC splade bead. This bead was then coated 3 times. 2 x base coats and 1 x top coat, this is also to comply with CSR Gyprocks warranty standards, trowelled any other way would void your warranty.
Well then. You have become brave and decided well i can save some money here if i sheet my 12m lounge room ceiling myself. But your probably wondering well what do i need to do to install it correctly. Well here is some simple advice i hope helps you along the way. Firstly you need to measure you room and work out all the sheets you need to get, remembering the biggest plasterboard sheet size you can get is 6m long.
Once you have worked out how many sheets you need, you will then need to think about labour, as in how many friends you will need to get it done. If you have a plasterboard sheet lifter like the one pictured below, then you can get away with sheeting your ceiling with you and your mate. If you do not have one of these machines then the minimum you will need is 3 people, but 4 is recommended. You can how ever hire out these sheet lifters for around $50 a day so that is not bad value really compared to your mates wanting a carton of beer each and a free barbie.
Now to the sheeting part. Usually you will start against a back wall, never in the middle, sometimes you have too, but usually against a back wall. If your finish is a square set finish it is advised to take of the 50ml recess on the edge of the first sheet when you start, thus making your first sheet 1150ml wide and not the regular 1200ml. If it is cornice then you do not need to worry, as the cornice will cover the recessed edge. Before you throw up your first sheet you need to glue it with a product called Stud Adhesive. You can see some i installed on the ceilings below. Now the stud adhesive is placed on at 200ml, 400ml, leave the centre then 800ml and 1000ml. Look at the picture below to get a better understanding. The reason we do not glue the centre is because that is where we will be screwing the sheet, 2 x 25ml screws either side of the 600ml line. If i was to put glue there and then screw in the same place it would cause problems because as the glue drys it pulls the sheet harder to the battens and will pull the head of the screw through the paper faced plasterboard.
Now also if your room is longer then 6m you will need a butt join, that is where the ends of 2 sheets meet together in a ceiling or wall. Now as you can see, my example sheet below stops halfway between 2 metal ceiling battens(these battens are installed at 450ml centres for 10ml sheet and 600ml centres for 13ml sheet), the reason for this is so the ceiling can be backed blocked (will explain this in a later post) so it pitches up where the join meets. This allows the tradesman to trowel the butt join back to a flat level later. You will have to measure the plasterboard to make sure it does stop between 2 battens because it does not always work out that a full 6m will land in that position.
Now once its glued and cut to the right size you can throw the sheet up making sure you screw with 25ml screws for 10ml or 32ml screws for 13ml sheet, both ends of the sheet on each batten and 2 in the centre on either side of the 600ml line. Now this is the way its done in Hobart, Devonport and Burnie, but in Launceston it is screwed another way, but this way is fine, less sanding later.
Just one last thing. When sheeting ceilings that are bigger than 6m long, make sure that butt joins are staggered at LEAST 600ml apart from the previous sheet, you can have them inline if there is a 1200 sheet between them but sheets next to each other must be staggered minimum 600ml to make it easier to hide the joins when trowelling.
Ok, now you know how to throw up 6m long plasterboard sheets, enjoy and have fun with it, it is heavy work but it is not impossible for you to do on your own and save yourself 1000’s of dollars in the process. #plasterboard
note: photos below were taken at Sorell Springs near Oatlands at a sheep station cottage called Brooklands. Hi Jack 🙂
How Much Insulation: Guide to work out quantities
Ok, so you have demolished all your walls in your bedroom and you are now ready to plaster them with new Gyprock plasterboard. One major component you should really consider is am i going to insulate. Me personally i would insulate every wall in my house and as we speak i am actually doing this to my own house now. I am using a soundproof insulation though which offers great noise reducing properties but is quite expensive per bag. Most new houses are insulated with R 2.0 wall batts and only on the external walls, which for me personally you might as well cop the extra expense and do the whole house while it is an empty shell. #insulatebeforeplaster
Anyway that is not the point i am trying to make here today. What i would like to discuss with you all is how much insulation do you actually need to buy to insulate your chosen room. Its simple really. You need to measure how many square meters the room actually is, remember i am only talking about walls here not the ceilings.
First thing you do, if its a square/rectangle room, is measure the width x length. Now say for example your bedroom is 6 metres long x 4 metres wide and the ceiling height is 2.7 meters high, a big bedroom hey, well then to get the square metres of the room you would add together 6 x 4, the room length and width, then x 2.7 the room height. So that would be 6 x 4 x 2.7 = 64.8 square meters. That will give you the total square metres for your walls in your bedroom. If you want to insulate the ceiling also, then you only times together the walls which is 6 x 4 = 24 square meters. For this example only we will stick with walls only, most people leave there existing ceiling and renew the walls only.
So after that calculation you need 64.8 square metres of insulation. This is great because when you buy insulation there is a sticker on the bag telling you how many square meters that bag will cover. See picture below.
You see on the bottom there the coverage is 4.5m2, well that is the only information you need to know to work out how many bags to buy. So for this example, mind you this insulation is the expensive soundbatts not the normal r2.0 wall batts, which have a much bigger coverage area per bag, we would divide our room by the coverage area of the bag.
Now lets calculate that: 64.8 square metres is your room and the coverage per bag in the photo is 4.5. SO 64.78/4.5 = 14.39. So for this example you would need 15 bags of the expensive R2.0 soundbatts to do the walls only in your bedroom. But that is if you use soundbatts because there is not as many per bag compared to normal R2.0 wall batts. I think from memory there is 6 per bag in sound batts and there is 22 per bag for normal batts.
Well i hope this helps you guys out when your trying to work how much insulation you need for your job, just remember work out the square meters and you can from that work out how many bags to buy…
Oh and if your not in a store to look at the bags, just get the rep to check the square meters it says on the bag of the insulation you want and you can do the math at home.
Anyway happy insulating everyone, this is a job i normally palm of to the apprentices lol, i have done plenty of insulating in my plastering lifetime. #howtoinsulate
Phillip Cordwell : http://ptcplastering.business.site
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Patch Drywall – Patching big holes in Plasterboard
Ok. You might have a patch like this and here are some basic drywall repair notes to keep in mind. Firstly find out what the cause of the damage was in the first place. If it is say for example water damage make sure the problem is fixed first before even attempting to patch or you will have to patch again later. Once that is sorted you need to cut out the damaged area into a nice square shape in which you will replace with new plasterboard. Once hole is cut put some timber blocks around edge of cut out hole so you can replace with new plasterboard. As seen below top left.
Now once you have sheeted the new plasterboard, you will need to tape this border with paper tape so it does not crack back out later down the track. Once you have done that, as it sets you scrape off any high areas in preparation for the second coat which i have done in the picture below bottom left. Again as this drys make sure you scratch/scrape of any high areas again in preparation for the top coat. Now your first 2 coats were done with a base compound as it sets hard and holds the tape in from cracking. The final coat is the top coat, which basically allows you to sand back the patch to a smooth finish ready for painting. I do recommend though when sanding always use a light to show imperfections up so you can patch before painting. #drywallrepair
Phillip Cordwell – http://ptcplastering.business.site
How To Plaster a Wall – Basic Sheeting Help
Ok, a question that i get asked a fair bit is how do you install plasterboard on to a timber framed stud wall. Well the first thing you need to do in measure the height of your ceilings. Why? Because if its 2.4m high the you can order 2 x 1200ml wide sheets. If it is 2700 high you can order 2 x 1350ml sheets. Plasterboard comes in these widths only, 1200ml and 1350ml(wide not length). Now if your ceiling is 3.0m high then you would use 2 x 1200 sheets then get 1 more 1200 sheet that you cut in half at 600ml. Just take a look at the right picture, i am installing the 600ml wide sheet first then i will put a 1200ml wide on top of that then another 1200ml wide sheet on top of that, making a total of 3.0m high.As you can see, on 3.0m high ceilings you always start with the 600ml wide sheet first. Why you ask? This is so you can reach the join easy when you trowel it up, if you put it near the top you will need a ladder to reach.
Anyway, before sheeting the wall you need to put insulation in, if the client wants it and you need to put the stud adhesive on the wall prior to putting the sheet on. Now a sheet is normally 1200 wide so in this case you would put daubs of stud adhesive at 200ml, 400ml, 600ml and 800ml on each timber stud. The top of the sheet is screwed or clouted and the bottom of the sheet is screwed or clouted. Do not put screw or clouts in the middle of the sheet. Later they will break the paper surface of the plaster and show through. If your sheeting big sheets like a 4.8m long or 6.0m long sheet, you can put some screws in the middle to hold it back till the glue sets. But remember to take these temporary screws out after and just plaster the little hole up, if you leave it in it will pull through the plaster down the track.
Well i hope this helps you DIY types and remember, the first thing you do before sheeting any wall be it timber or steel or brick is to measure the height of your ceiling so you know the right type of sheets to get. #howtoplasterawall
Phillip Cordwell – http://ptcplastering.business.site
Just a quick one here on sanding and plaster repair. If you remember back to last posting i was talking about taping in internal angles using paper tape. Well as you can see on your left the wall and nib wall are now got a coat of paint on it. But before i painted i had to sand this area. After i used my dustless sanding machine you still have to go through and BLOCK sand the internals and anywhere else the machine could not reach. i.e around the power points etc.
If ever you end up doing this for yourself, make sure you buy the angled sanding blocks as you can see in the images below, not the straight edge ones, because with the angled sanding blocks you will not dig out the plaster on the other side of the internal as your sanding it. If you use a straight block it hits the other wall in the corner and digs out the plaster, leaving plaster repair work to be done.
Anyway just a quickie
Phillip Cordwell – http://ptcplastering.business.site