Table of Contents
bonding is a undercoat plaster for low suction background like concrete. hardwall has high impact resistance and is quicker drying.
What is Hardwall used for?
Thistle Hardwall is a gypsum undercoat plaster for use on most masonry. With a final coat of Thistle Multi-Finish, it provides a smooth, inert, high quality surface to internal walls.
Can I use Hardwall instead of bonding?
Hardwall is for block and brick, i also use it for filling in chases. If you want to use hardwall for low suction backgrounds such as a artex ceiling i would use a bonding agent such as bond-it or wicks plaster bonding agent rather that pva, That is what i do anyway.
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.
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.
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. It is suitable for application by hand or by plaster projection machine.
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.
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 plaster on to 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 Gyproc Hardwall?
Thistle HardWall is a quick drying undercoat plaster suitable for use on most masonry backgrounds such as bricks, medium-density and aircrete blocks. Thistle HardWall can be hand or spray applied and is ideal for use in a 2-coat plaster system.
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.
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
Which plaster is best for walls?
Cement plaster is the best bet when it comes to plastering exterior walls because it is moisture-resistant and will protect the wall against climate changes as well as environmental pollution. Moreover the durability factor in cement plaster makes it the ideal choice for internal plastering too.
How many Metres does a bag of Hardwall do?
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. As the manufacturer will tell you this is, of course, just a guide. For a re-skim it’s probably a metre or so less and for Bond a metre less again, but thats just my opinion.
How long before you can 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.
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 Hardwall?
If you are part tiling a wall of hardwall, you are obviously better to skim it all. 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.
Where should Hardwall plaster be used?
Hardwall Plaster: Hardwall is similar to Browning except that it offers a higher impact resistance and quicker drying surface. It is the most often used undercoat plaster these days, and can be applied to most masonry surfaces.
Can you Hardwall onto brick?
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.
