Asked by: Sampson Sanchez Ocaña
home and garden interior decorating

How long does HardWall take to dry?

17
Allow The Bond Coat 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.


Simply so, how thick should HardWall plaster be?

Your basecoat plaster should be around 1.5 – 2mm thick, while the finish coat should have a 2 – 3mm thickness.

Beside above, what's the difference between HardWall and bonding? bonding is a undercoat plaster for low suction background like concrete. hardwall has high impact resistance and is quicker drying. browning is a undercoat plaster for moderate backrounds with adequate mecanical key.

Keeping this in consideration, how much water does a HardWall need?

I have been mixing hardwall in a jumbo bucket, so that I can mix one whole bag at a time with electric whisk. The manufacturers state 15 litres of water to a bag.

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.

Related Question Answers

Ladislav Schifflechner

Professional

How much does 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.

Manie Zekraoui

Professional

Can I plaster straight onto brick?

Plastering Directly to Brickwork
Although uncommon these days, it is sometimes still necessary to plaster directly to old brickwork or blocks. This is more commonly done on small areas of wall where sections of old plaster have come away and is done as a 'patching in' job, rather than over an entire wall.

Eudosio Cristov

Explainer

Is Multi finish breathable?

Original plaster contributes immeasurably to the qualities of an old building. Unlike modern cement-based products and gypsum plasters, which are hard, inflexible and non-breathable, traditional lime and clay formulas have a soft, characterful appearance, offer a degree of flexibility and are breathable.

Aamer Caballe

Explainer

Can HardWall be used on external walls?

Hi this may help but I know that on an internal brick wall and cavity wall you can use Hardwall and skim. 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.

Jurdana Ernesti

Explainer

How long do you leave bonding coat before skimming?

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.

Ibtissam Schafers

Pundit

What is the difference between board finish and multi finish?

Board Finish is for low to medium suction whereas Multi-Finish is for nearly all variations of suction.

Abib Gastaminza

Pundit

How thick can you apply bonding?

What thickness should bonding plaster be applied at? Both bonding and browning plasters are considered undercoat plasters. Undercoat plasters are typically applied at 8mm thickness for ceilings and 11mm thickness for walls.

Martiria Quagliani

Pundit

Should I PVA before Hardwall?

Don't generally need pva for hardwall, just wet the wall, but if very porus, then a thin mix won't hurt.

Kerman Funk

Pundit

What is the mix ratio for plastering?

Mix Ratio of Plaster: Mix ratio mean the ratio of Volume of Cement to the Sand used in the mixture. Plaster of mix ratio 1:4 mean that it contains one part of cement and 4 parts of sand by volume.

Eveline Gachev

Pundit

Should you PVA plasterboard before plastering?

The plasterboard does not need to have any PVA applied - you are fine to just apply the plaster direct. However if the plasterboard is old or you are concerned for any other reason -then applying PVA will not cause any problems. Applying a small amount of plaster to test the suction is always a good idea.

Zhengwei Hazai

Teacher

How do you bond plaster?

How to mix up bonding plaster
  1. Add the water. Start with a half bucket of clean water poured into the mixing bucket.
  2. Add the plaster and mix. Then add the bonding plaster to the bucket and start to mix with the drill and paddle, slowly adding more plaster as you go.
  3. Mixing the plaster thoroughly.
  4. Take your time.

Vicente Ferro

Teacher

What is multi finish plaster used for?

Thistle Multi-Finish is a gypsum finish plaster for use on a wide range of backgrounds it provides a smooth, inert, high quality surface to internal walls and ceilings, and a durable base for the application of decorative finishes.

Lizer Landaregui

Supporter

Should you PVA before bonding?

in my experience some backgrounds need a few coats of bonding. apply the pva and leave for five min,if it goes dry quickly,apply another coat. idealy the pva should be tacky to the touch before applying the plaster. personaly i would never apply plaster directly on to wet pva.

Josephine Santosjuanes

Beginner

Can I use bonding to stick plasterboard?

Dot and dab is used where there is no stud wall to screw (or nail) the plasterboard to. It is much quicker to use a direct bond to stick the plasterboard directly to the wall rather than having to build a stud frame first. It is a very quick and effective way to dryline an internal masonry of brick wall.

Erick Godejohann

Beginner

Can I use bonding on plasterboard?

To put it into context - standard plasterboard is the same - this will also not withstand continued dampness but is fine on a bathroom ceiling. One coat of bonding coat over your existing plasterboards (sealed with PVA if in doubt) can then be ruled flat with a straight edge.

Fae Via

Beginner

Why is plaster pink?

UK plaster is pink due to impurities that they don't bother to remove, so it should be dirt cheapit isn't. Gypsum is Calcium Sulphate. 1/2 water. It is white in it's normal state.

Rosalino Palas

Beginner

How do you use thistle bonding?

Im using thistle bonding plaster, first rough coat up to 1cm thick then smooth with thin second coat . When is good set but still wet you can skim with multifinish or when completely dry paint with pva and then skim.

Marceli Gabiola

Beginner

How thick can multi Finish be?

Multi can be applied 2-5mm thick so you could build it up in, say, 3 coats but it may well craze badly if you dont get it right.

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EveryThingWhat Staff Editor

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2nd July, 2021

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