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From £52.81 + VAT per bag

Vapour control plaster – UdiMULTIGRUND

UdiMULTIGRUND vapour control plaster is:-

  • the base coat plaster for all internal Udi wood fibre insulation systems
  • a lime based bonding coat plaster which regulates moisture flow in insulation systems.
  • a strong, reinforcing coat with fibreglass mesh.
  • a natural white fine finish coat

Gallery
UdiMULTIGRUND_clipped_rev_2 Material in action. UdiMULTIGRUND bonds extremely well to all wood fibre substrates as well as masonry of carrier board substrates. It is normally applied at around 4mm thickness and should always be used with a reinforcing mesh, as in this picture, to ensure it is crack free. As a base coat, it forms a very robust, airtight surface which can then receive any other lime or clay finishes as well as receiving airtight tapes and membranes if required.

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Product overview

Where is it used?

  • It can be used internally on all wood fibre and wood wool substrates and is used in conjunction with UdiREINFORCEMENT mesh to provide a robust reinforced plaster layer.
  • It can also be used internally on concrete, masonry, lime and lime/cement plasters so long as they are sound and able to take another plaster layer.

How is it used?

  • UdiMULTIGRUND vapour control plaster is best mixed clean tap water, using a plaster whisk to a smooth lump free consistency.
  • It’s ‘sticky’ nature means it is very easy to apply to a whole range of backgrounds.
  • It should be applied with a clean steel trowel and the whole surface ‘combed’ with a 20mm round knotched trowel whilst it is still wet, aiming for a minimum 5mm layer.
  • UdiREINFORCEMENT mesh should then be trowelled in to the surface (overlapping each piece by 100mm) and covered by the UdiMULTIGRUND so that it is no longer visible.
  • Allow a drying period of 1mm per day before applying subsequent finishes.
  • As with all lime based materials, it should only be used when temperatures are above 5 degrees Celsius and away from strong, drying winds and direct sunlight.
  • For full instructions please read the data sheet.

How much will you need?

UdiMULTIGRUND has a density of 1.5kg per mm per m² (1mm thickness of plaster over 1m²). Each 25kg bag will cover up to 4.2m² at 4mm thickness.

Frequently asked questions

How long does it take to set?

Setting times vary with temperature and humidity but in the summer the product will usually stiffen enough to finish in a few hours and set hard overnight. In winter stiffening may be extended to more than one day with hardening more than two days.

Technical details

Product downloads

Product Data Sheet – UdiMULTIGRUND

Pricing & shipping

This product will require one pallet space and so shipping is likely to cost between £50 and £100, depending on where you live. Contact Us for a more accurate costing.

Bag weight (kg) Coverage [m²]Single bag costFull pallet bag cost
253.5£58.10£52.29

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We’d like to hear from you. Call us on 01392 861763 or email us at chris@backtoearth.co.uk with any questions or comments.

If you can’t seem to find what you need on our website or you have large quantities of materials to purchase please contact us for a chat and we’ll offer you a more bespoke solution.

We’re normally open from 8.30 am to 5 pm Monday to Thursday, and 8.30 am to 1pm on Friday.

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