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Hardwall Plaster is typically used in both residential and commercial construction as a finishing coat over cement render or concrete in preparation for painting. When used with hydrated lime (lime putty), a high gloss finish is produced which can be waxed to create a decorative finish.
What’s the difference between Hardwall and bonding?
Bonding– it is a gypsum based undercoat plaster for low suction backgrounds like tiling, dense concrete blocks, engineering bricks, concrete, plasterboard surfaces. Hardwall- it is a gypsum based undercoat plaster used for more absorbent surfaces (mostly on masonry) than bonding.
Do you need to PVA before Hardwall?
4 Answers from MyBuilder Plasterers You should put PVA on, but you cannot tile onto hardwall. It will need to be gone over with multifinish and then allowed to dry. A tiling sealer (not PVA) should then be applied prior to fixing tiles.
What is a Hardwall?
noun. a type of gypsum plaster used as a basecoat.
What is Hardwall plaster made of?
Thistle Hardwall is a lightweight, retarded hemihydrate, pre-mixed gypsum plaster, incorporating special aggregates and additives, requiring only the addition of clean water to prepare it for use.
Can you tile onto Hardwall?
Re: Tiling on to hardwall Dri-Coat is the only undercoat plaster you can tile directly on. Ideally you’d take it back to brick and either dot & dab plasterboard or use tile backer boards.
How thick can you apply Hardwall?
When a substantial area is covered, Thistle Hardwall is worked and ruled as in hand plastering. It is easier to attain the required thickness of plaster in one application by machine, but the total thickness should not normally exceed 25mm (subject to background suitability).
Can I plaster straight onto brick?
Plastering directly to bare brickwork or blocks, known as ‘wet plastering’, is still favoured by some for its superior soundproofing. A cement render or gypsum backing (known as a scratch coat) is first trowelled directly onto blockwork before this is finished with a thin skim coat.
When can you skim over Hardwall?
Hardwall is more for blocks. Best to Hardwall and skim in the same day. If not possible whenever your ready to skim the wall apply two coats of pva first to stop the suction .
Can you use SBR instead of PVA?
One key difference is that, whereas PVA remains water soluble after drying, once dry SBR is not. Consequently, the SBR bonding agent is more suitable for situations where damp might be a factor, such as external finishes, shower areas and swimming pools, as well as in sand or cement screeds and renders.
What can you use instead of Hardwall?
Hardwall is gypsum based so is not ideal to use on a solid wall in an older property. It will adhere fine, as it’s designed to go over brick and blockworkyou don’t pva, just wet the wall, but you would be better with either sand and cement or a renovating plaster due to the possibility of damp coming through.
Can you plaster over HardWall?
My plasterer liked to apply hardwall (or bonding as appropriate) and then get the skim coat on once the hardwall had just gone off. If you let the hardwall go off completely the skim coat doesn’t apply as nicely – so he said at the time. That’s really useful, but a bit late for the walls that I’ve done.
How do Hardwall hangers work?
Hardwall hangers are plastic hooks with metal pins on top that penetrate through the surface of the wall. They typically support objects no heavier than 20 pounds, and the objects must exert a downward pull only and not away from the wall.
Can I paint over Hardwall?
Thistle plasters can be decorated with most paint finishes and wallcoverings. A permeable paint can be used in the interim. Take care with Thistle Hardwall which dries from the surface, appearing surface dry before it is fully dry in depth.
Can you use Hardwall in a bathroom?
2 Answers from MyBuilder Plasterers You can dryline the shower walls using Aquaboard and wet plaster over that. Or depending on the substrate, the plasterer will use either Gyproc Hardwall or Gyproc Bonding. Providing the area is fully tiled, any one of these methods will be okay.
What is the best plaster?
Plaster Types – The Top 11 Bonding Plaster. A Base Plaster for Smooth Surfaces. Hardwall Plaster. Similar to Browning Plaster, a High Impact Resistance Base Coat. Tough Coat Plaster. Hardwall Plaster’s Tougher Brother. One Coat Plaster. ThistlePro DuraFinish. Board Finish Plaster. Thistle Bonding 60. Multi-Finish Plaster.
What is primer for tiles?
to reduce the porosity (absorbency) of substrates or bases to prevent the formation of air bubbles or pinholes. to minimise the risk of a chemical reaction with cement-based adhesives. to add surface strength to weak (or powdery) surfaces. to help prepare surfaces prior to waterproofing.
How much does a bag of Hardwall coverage?
Thistle HardWall Order Code Nominal bag weight (kg) Approx coverage (m²) 06110/3 25 3.0.
How much water do you mix with Hardwall?
Using Thistle Hardwall onto breeze blocks (internal wall). No Nonsense PVA suggests 3 PVA to 1 Water for concrete or mortar application. And for plastering 5 PVA to 1 Water.
What is the difference between plaster and render?
The basic difference between plastering and rendering is; plastering is carried out on interior surfaces while rendering is undertaken on exterior surfaces. More specifically, the difference between plastering and rendering concerns the combination and type of materials used.
How much does a plasterer charge per day?
Usually, plasterers rates are around £150 to £200 per day. However, it’s a good idea to make sure you have enough work for at least a day because many plasterers charge a minimum fee of around £100. Plasterers also charge by the hour for small jobs, such as repair jobs spread over many rooms.
Can I plaster a wall myself?
Plastering is most definitely a skill, so you should understand that before you begin. Any skill can be learnt, but it’s going to take you a bit of time and a bit of practise. With a bit of time, learning and careful work, you can totally tackle plastering through DIY!Sep 10, 2019.
