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What is 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.
What is Hardwall used for?
Hardwall plaster is an undercoat plaster that is most commonly used with masonry backgrounds like bricks and medium-density blocks. Just like the other undercoat plasters we’ve spoken about, hardwall is an ideal base to work with; more so, its easy application is one of the reasons it is so popular.
What is a Hardwall?
noun. a type of gypsum plaster used as a basecoat.
What can I use instead of bonding?
What is another word for bonding? adhesion adherence tie sticking union fixing coherence gluing US cohesion glueing UK.
Should I PVA before Hardwall?
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.
Can you Hardwall over bonding?
Bonding plaster has incredible “stickabilty” and does not rely on an absorbent surface to bond to. Bonding can be applied to really dense concrete blocks or engineering bricks and even concrete itself. Browning Plaster: Browning plaster is also an undercoat plaster for use on more absorbent surfaces.
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.
How long does Hardwall take to go off?
Thistle Hardwall stored correctly has a shelf life of 4 months and bags are printed with the ‘use by:’ date in order to permit use in strict rotation.
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.
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.
What is Hardwall 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.
How thick can bonding be?
Both bonding and browning plasters are considered undercoat plasters. Undercoat plasters are typically applied at 8mm thickness for ceilings and 11mm thickness for walls. Following application of undercoat layers then a finish coat is added which should be 2mm thick normally.
How thick can bonding coat be?
Floating coats should be applied at a thickness of 8mm, up to a total plaster thickness of 25mm, and wire scratched between each coat. The final floating coat should be ruled to an even surface and lightly scratched to form a key for Thistle finish plaster, such as Thistle MultiFinish.
What is the best plaster for walls?
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.
How much does a bag of Hardwall coverage?
Thistle HardWall Order Code Nominal bag weight (kg) Approx coverage (m²) 06110/3 25 3.0.
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.
Can I use bonding plaster to fill holes?
Bonding coat can fill large holes/chunks. It’s all in the mix – your looking for a whipped cream consistency. I find it makes it very easy to apply. Slap it on and leave it rough, don’t try to finish it when it’s just been applied.
How long after Hardwall Can you plaster?
Bonding about 2-3 hours, but some do leave it to following day before skimming depends on size of area. The 3-4 days is a guide, the colour of the plaster will tell you when it’s dry enough to paint.
Can you tile onto sand and cement?
The render must be a minimum of 2 weeks old to enable movement caused by drying shrinkage to have taken place. It must be clean, dry and free from dust, laitance or any other contaminants which may act as a release agent, preventing the adhesive from bonding to the render.
Can you tile over one coat render?
When tiling with a cementitious-based tile adhesive, prime the render with one coat of BAL Primer or BAL Prime APD – diluted 1:1 by volume with water. Allow to dry before tiling. No priming is required when using a ready-mixed adhesive such as BAL White Star Plus or BAL All Star.
