Renovating Plaster

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Overview

Contact

Call: 03444 630 046 Email: limelite@tarmacbp.co.uk

Uses:

Limelite Renovating Plaster can be used to replace existing lime based plaster or as part of a new plaster system in both modern and traditional buildings and is an ideal solution for flood damage repair or flood damage prevention.

Features:

  • Breathable – can be applied directly to damp walls and substrates
  • Prevents corrosion of metal fixtures, such as angle beads and lath
  • Provides a barrier to salt and efflorescence
  • Lightweight – less than half the weight of a sand and cement plaster
  • Insulating
  • Fibre reinforced
  • Reduces condensation
  • Rapid drying – 24 hours per coat
  • Lime content makes the product naturally aseptic, preventing mould growth

Downloads:

Technical Data Sheet (pdf) Safety Data Sheet (pdf)

Product Description:

Limelite Renovating Plaster has been developed specifically for use in renovation projects. It offers many of the advantages of a traditional lime plaster but with easier workability and far quicker drying times.

Breathable
Conventional gypsum plaster is hygroscopic, meaning that moisture from the atmosphere or substrate is absorbed and retained. Limelite Renovating Plaster is breathable, allowing moisture to be released.

Reduces mould growth
Improved breathability and less retained moisture helps to avoid mould growth and efflorescence. Lime is naturally aseptic and inhibits the growth of bacteria and mould.

Versatile
Can be used on a wide range of traditional substrates such as solid brick and stone walls, wooden lath. It can also be used on walls that have previously suffered from damp or flooding.

Quick drying
A quick drying renovating plaster, it dries quickly. Additional plaster coats or paint to be applied in just 24 hours. This allows faster completion and less disruption.

Reduced shrinkage
Incorporates polypropylene fibres to control shrinkage, avoid cracking and improve the flexural strength and impact resistance of the finish.

Renovating plaster is part of the Limelite Breathable Plaster System, a system BBA approved eliminate damp and mould
Part 1 - Limelite Easy Bond – breathable primer
Part 2 - Limelite Renovating Plaster
Part 3 - Limelite High Impact Finishing Plaster

Learn more about the system

Protects architectural features
Less retained moisture and efflorescence helps to protect adjoining materials such as timber beams, stone or ironwork from damage or discolouration. It also prevents corrosion of metal lathing, angle beads and conduit.

Trusted performance
Limelite Plasters have been trusted by conservation professionals in some of the most sensitive and demanding heritage environments such as historic buildings, museums and art galleries.

Excellent finish
Limelite plasters are lightweight, easy to mix and make it easy to achieve a smooth, matte finish that complements traditional and historic buildings. It can be left unpainted for a natural, off white finish. They are applied using standard plastering tools and techniques without any additional training requirements.

Repair of damp or flooded properties
Can be applied to damp walls, making it a fast, effective solution for repair of flood damaged buildings. As it is breathable, it allows any moisture still present in the substrate to be released. It also helps to mitigate future flood damage by helping surfaces to dry out faster.

Fire resistance and thermal performance
Limelite Renovating Plaster contains lightweight perlite, a material proven to improve insulation. This, combined with the ability to remove trapped moisture significantly improves thermal performance.

Responsibly sourced
All of our products are manufactured in the UK and certified under BES 6001 Responsible sourcing. Tarmac was the first company within the cement and lime sectors to be awarded the BES6001 ‘Excellent’ rating across its entire product range.

Fire Resistance
Limelite Renovating Plaster is a non-combustible product (as defined in BS 476: Part 4), and can be designated Class O in accordance with the requirements of the National Building Regulations for use as a surface finishing material.

Salt Resistance
Limelite Renovating Plaster contains salt inhibitors to prevent efflorescence and salt transfer. In areas of heavy contamination,heavy contamination, such as chimney breasts, Limelite Easy-Bond slurry primer should be used prior to the application of Limelite Renovating plaster.

Compatibility
Limelite Renovating Plaster is compatible with most building materials. Lime plaster, however, is not compatible with gypsum, and therefore Limelite Renovating Plaster must not be used with gypsum finishing plaster or gypsum plasterboard. Bituminous coatings and traces of gypsum should be removed before plastering.

Technical Data

Dry powder density 600 kg/m3
Density air dried 800 kg/m3
Density oven dried 725 kg/m3
Compressive strength at 28 days 3.0 N/mm2
Flexural Strength at 28 days 1.4 N/mm2
Modulus of Elasticity 2,100 N/mm2
Appearance as supplied Fine grey powder
Appearance after application (dried) Light grey keyed finish
Thermal conductivity (k) at 0% moisture by volume 0.13 W/m°C
Thermal conductivity (k) at 3% moisture by volume 0.21 W/m°C
Thermal resistance (R) at 13mm and 3% moisture by volume 0.058 m2 °C/W
Thermal data above is obtained from CIBSE A3 Guide Thermal Properties of Building Structures

Thermal data above is obtained from CIBSE A3 Guide: Thermal Properties of Building Structures.

Technical performance is derived by laboratory testing at 20°C.

Typical Coverage

Application Thickness Coverage/25kg Coverage/Tonne
10 mm 3m3 120m3
20 mm 1.5m3 60m3
30 mm 1m3 40m3

Figures are approximate and do not account for site wastage.

Model Specification

Limelite Renovating Plaster is associated with the following NBS clause:

M20 Plastered/Rendered/Roughcast coatings

 - 330 PROPRIETARY LIME:SAND

Limelite Renovating Plaster should always be used with a skim coat of Limelite High Impact Finishing Plaster.

Mixing Instructions

For best results Limelite Renovating Plaster should be mixed in a clean mixing vessel using a mechanical mixer such as a slow-speed drill and paddle mixer.

Fill bucket with approximately 12.5 litres of cool, clean water. Add 25kg of dry powder to the water and mix for 2-3 minutes until a smooth, homogeneous working consistency is achieved.

Allow to rest for 3 - 5 minutes, then re-mix back to consistency adding small amounts of water if necessary.

Application Instructions

Solid substrates – Brick, block, stone etc.
Substrates should be cleaned and any loose or friable material removed. Traces of gypsum plaster, bitumen or other materials that could cause a barrier to adhesion must be removed.

Substrates should be primed with Limelite Easy-Bond and the first coat of plaster should be applied once the priming coat is tacky.

The plaster should be applied in coats between 7-15mm and a minimum of 24 hours is required between coats. A suitable horizontal scratch should be applied between each coat for a key.

Once the desired thickness has been achieved Limelite High Impact Finish should be applied as a skim coat. Note that gypsum finishing plasters are not suitable for use with Limelite Renovating Plaster.

Wooden Lath

The lath should be cleaned and repaired to a reasonable condition. An initial coat of approximately 6mm of Limelite Renovating Plaster should be pushed into the lath to create a solid backing. This should then immediately receive a further coat of Limelite Renovating Plaster which should be used to level.

The plaster should receive a suitable horizontal scratch and be left to cure for a minimum of 24 hours before applying Limelite High Impact Finishing Plaster. Note that gypsum finishing plasters are not suitable for use with Limelite Renovating Plaster.

Decoration

Limelite plasters can be decorated 24 hours after application of Limelite High Impact Finishing Plaster. Paints used must be breathable, such as mineral based or water based paints.

Wallpaper and tiling is not recommended due to the non-porous nature of the finish. However, if wallpaper or tiling is used the moisture content of the plaster must be checked and deemed suitable by the supplier of the decorative finishes before application.

Clean Up & Spillages

Tools and equipment can easily be cleaned using water. Cleaning of tools and equipment should be carried out as soon as possible after application.