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Don’t generally need pva for hardwall, just wet the wall, but if very porus, then a thin mix won’t hurt.
Should you 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.
Do you need to PVA before bonding plaster?
Do you need to PVA before skimming? Preparing a wall for re plastering requires a dilution of around 3 parts water to 1 part PVA glue. PVA glue can be applied immediately before the skim coat is applied having allowed the PVA glue dilution to have become tacky before plastering.
Can you plaster straight onto Hardwall?
You can plaster directly over hardwall the day after. As Wine~o said, pva either day before or prior to skimming. Try not to over saturate the hardwall as it will blister. Blue Grit will give a much longer workable time.
How long do you leave PVA before bonding?
Clamping is required for 30 minutes to 1 hour to set the glue; curing time is 18 to 24 hours. School glue, a type of white glue, dries more slowly. Inexpensive and nonflammable, PVA glue dries clear.
How long does Hardwall take to go off?
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.
Should you PVA before dot and dab?
I would dilute pva with water, about 4-1 and roller it on as its quicker, when dry it will be hard and wont be sandy at all. Ideal for dot and dab.
Do you PVA bonding plaster?
Yep just like any other backing plaster and certainly no need to PVA unless its been on a good while and then you can just wet it.
Does Hardwall go off?
Kitchy said: Mate hardwall goes off quick in the best of times is it really worth it in using 2 bags!Mar 3, 2016
How long after PVA can I plaster?
For high suction, seal up at least 24 hours before . PVA not much good on a high suciton background unless it has well set, usually even a few coats the same day not good enough. Then, of course, apply plaster to a tacky fresh coat of diluted PVA.
How thick can you put Hardwall on?
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).
What is the difference between PVA and waterproof PVA?
When it says waterproof it is not completely waterproof but it is substantially more so than ordinary PVA, which makes it far more suitable for applying under water based paint. Anyone who has used ordinary PVA knows that it’s difficult to paint over with water based paints, but not this.
Is PVA a good sealer?
Timber can be sealed with PVA to give it a waterproof quality, although if the surface of the timber is to be subject to any wear or traffic, then PVA, as it is an emulsion, will eventually fail. Similarly we do not recommend using PVA as a sealer on walls that are to be over painted with emulsion paints.
Is SBR better than 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 is dry coat plaster?
Gyproc Dri-Coat is a cement-based renovating plaster formulated for re-plastering after the successful installation of a new damp proof course. Gyproc Dri-Coat should only be used for re-plastering after the successful installation of a new damp proof course, or elimination of the source of dampness.
How much does a bag of Hardwall coverage?
Thistle HardWall
| Order Code | Nominal bag weight (kg) | Approx coverage (m²) |
|---|---|---|
| 06110/3 | 25 | 3.0 |
What’s the difference between bonding and Hardwall?
bonding is a undercoat plaster for low suction background like concrete. hardwall has high impact resistance and is quicker drying.
What is the difference between Hardwall and multi finish?
Hardwall Plaster: Hardwall is similar to Browning except that it offers a higher impact resistance and quicker drying surface. Multi-Finish Plaster: Thistle multifinish is a top coat plaster which is suitable for a great finish on all the other surfaces.
Can you tile on Carlite bonding?
Can you tile on Carlite bonding? I spoke to the plasterer this afternoon and he has told me that carlite bonding is perfectly ok to tile on providing the suction has been neutralised by applying something like Bal Bond SBR prior to tiling.
Is PVA a Waterproofer?
Although most PVA glues used industrially are water resistant to grade 2, which means they can sustain several cycles of soaking/drying without having the glue fail, they are NOT Waterproof.
Can I tile on to Hardwall?
If you want a surface to tile, sand and cement is the one, but any sound skimmed surface will do you. You can tile onto hardwall and it will last, and you can get hardwall closed in good enough with fat to help the tiler.
How long does Thistle Hardwall take to dry?
Allow Bond Coat to dry for 45-90 minutes depending on the thickness and environment that it’s drying in. When its no longer wet to the touch you are ready for the finish coat of plaster.
How thick should bonding plaster be?
How thick should a 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 Multi-Finish.
