Plastering & Rendering

Hard wall or sand and cement over brick

Anonymous user 03/03/2024 - 3.16 PM

Update: 3rd October 2017 With reference to the below question, so far managed to render the walls using s/c with waterproofer. Took some practice, but did a good job, with the aid of a Darby. Question, I have a wooden joist across the top of two walls above the bricks, what is the best and correct method to apply wet plaster i.e. s/c? I have researched wire mesh, seen some at toolstation galvanised wire mesh, will this work and hold the render? If yes, do I secure the mesh tight against the wooden joist, or loose and allow a gap between the joist and the mesh? Your help and advise has been beneficial so far, much appreciated! Thank you very much for your advice, much appreciated. I have some additional questions: I am planning to go with s/c, but how much lime do I use and which type? Is it 4:1:1 i.e. sand/cement/lime, isn't the lime already added to the cement? I understand it helps with the workability, hmm maybe prevent cracking, I'll leave this to you guys to clarify! If I also add waterproofer to the mix, how much? Lastly, how much material (above) would I require for a box room, only three walls, one is a stud wall adjacent to the bathroom. Reason to go with s/c, tight budget, I hear you on the dry lining with thermal boards, but I'll lose space internally. Despite the internal insulation, I am planning to insulate externally in the next few years. Again, appreciate your advice. Glad I stumbled across my builder :) Hello, Renovating three bedrooms of my 1930's semi detached house. Removed wallpaper, also had to remove all the plaster back to brick (only done this to the box room so far) most of it was blown, the base coat was a light grey colour. A polish plasterer popped over to take a look, (recommended from brother in law). He advised as it's solid walls no cavity he will use sand and cement followed by two coats of multi finish. He also advised to only patch other room walls where the plaster has blown, then fill with bonding, and prep the walls with one coat of PVA, then he will do the rest the next day. He also said to remove the plaster if you see cracks. I have looked into hard wall.plaster, do you recommend hard wall over sand and cement for exterior facing walls? I haven't seen any signs of damp, I have installed a vent in the box room. I appreciate your advice, especially to my last question. Regards Aj