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Pour the required amount of water into the mixing bucket (see selector chart for details). Only add clean water and do not use any additives. Add plaster to the water and mix by hand or a slow speed, high torque mechanical whisk. Thistle plasters should be mixed to a smooth creamy consistency.
How much water do I mix with Thistle Hardwall?
Using Thistle Hardwall onto breeze blocks (internal wall). No Nonsense PVA suggests 3 PVA to 1 Water for concrete or mortar application.
How do you mix Hardwall?
Thistle Hardwall is pre-mixed with aggregate and only clean water needs to be added to prepare it for use. Hand mixing should be carried out in a clean tray or bath. Excessive mechanical mixing should be avoided. Tools and water used in mixing must be clean.
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.
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 does a bag of multi finish cover?
How much will a bag of multi finish cover? Well if you go by the spec a bag of Multi and Board finish will cover 10.25-75 m2 at a coverage of 2mm on Plaster board.
Can you tile over multi finish?
At least its new plaster so if it’s been applied correctly, then it’s unlikely to delaminate. Make sure it’s dried out well, couple of coats of primer then off you go. You’ll need flexible tile adhesive (bagged) for porcelain.
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
Can Hardwall be used on external walls?
On an external wall that is single brick you must use sand and cement. out of line etc Straight walls, pre-mix plaster, hardwall etc or sand and cement(lime aswell). Use multi finish for top coat. PS walls will need to be prep with PVA or build grit depending on surface requirements.
Is thistle multi finish breathable?
Breathaplasta is a high-performance, quick setting lime plaster that is a healthier alternative to standard internal plasters and helps reduce problems with condensation, damp and mould. Its natural lime, the bio-based formulation is flexible, highly breathable and moisture regulating (hygroscopic).
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 before plastering should I PVA?
Nojob Smallenuf New Member. Not a plastering expert but I think the routine is to apply 1 coat of PVA and allow to dry fully i.e. 24 hrs., and then apply second coat of PVA maybe 1 hour or so prior to application of plaster. The second coat should be tacky rather than dry.
How soon can you skim over bonding?
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. Need to leave decent time between paint coats, for each to throughly dry before applying the next one.
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.
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 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.
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.
Why is Hardwall plaster cracking?
If the background has a lot of suction/or is very dry, the plaster will crack as the moisture is absorbed too quickly into the substrate,, it needs prep first, to control the suction. Too much heat will do the same by drying the plaster to quickly causing it to shrink and crack.
Can you tile on Thistle bonding?
No, tiles should not be applied directly to Thistle undercoats, with the exception of Thistle DriCoat.
Can you Hardwall over 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 tile directly onto 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.
What’s the difference between plastering and skimming?
Skimming is the name given to a plastering technique where a wall is plastered with a layer of thin coat. It is usually applied to an existing plaster to smooth the surface. Another difference between skim and plaster is that plaster surfaces are always rough whereas a skimmed surface is smooth.
Can I tile onto undercoat plaster?
yes you can,but it would be better with a finish coat,there will be to much suction on browning/bonding so you will have to kill the suction with uni-bond/water mix,leave for 24 hours and then tile straight onto the backing coat.
