Replastering

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Thermal Render

Part of the Peter Cox DryWall Range

It's essential that the correct plastering materials are used after the treatment to prevent further damage to internal decorations. Thermal Render, part of the Peter Cox DryWall range was developed to provide an economical method of wall insulation, while dealing with salt affected plaster.

The render helps the wall retain more heat,  reducing the amount of thermal loss through external walls, meaning a reduction in heating bills. Although it can be used to replace old or damaged plaster, it is especially useful after the insertion of a remedial damp proof course, as it prevents salts in the wall migrating to the plaster surface.

Because this product helps reduce Carbon Emissions (CO2) it can be charged, along with all associated works, at 5% VAT, including removing and refitting skirting boards, radiators etc.

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Salt retardant

Following the installation of a remedial damp proof course, it is vital that a special salt retardant plaster is used to create a barrier to hold the salts in the wall. This will stop the top surface of plaster from becoming contaminated by hygroscopic salts. Traditional lightweight plasters are not able to prevent salts migrating to the surface, which means the wall will appear wet again. Thermal Render is ideal as it prevents the migration of salt.

Thermally efficient

Thermal Render is more thermally efficient than traditional sand and cement renders, reducing heating bills. The product reduces condensation and mould growth as the thermal render raises the surface temperature of the wall. Thermal Render is also comparable with traditional lime based mortars in terms of shrinkage and breathability.

The term U-value is a measurement of how effectively a structure retains heat. U-values are obtained by calculating the resistances of all the elements involved.

The lower the U-value the better the material is as a heat insulator, so less heat is lost. An uninsulated, solid wall (229mm thickness) would have a U-value of 2.0 W/m2 K. This takes into account all materials including bricks, basecoat plaster, and finish coat plaster.

Benefits

  • A guaranteed solution to prevent salts from migrating to the surface in a wall previously affected by rising damp

  • EVA coating allows the wall to breathe so residual moisture can dry off through the plaster finish (Only light non-vinyl decorations should be used for 12 months)

  • It helps keep valuable heat in your home meaning it can pay for itself over time whilst reducing CO2 emissions

  • A plaster skim finish is applied internally matching existing plaster, meaning no visual differences between the thermal render and standard non-thermal plaster finishes

  • Thermal Render is guaranteed, giving you peace of mind

Features

  • Thermal Render uses EVA (Ethylene Vinyl Acetate) emulsion as a bonding agent and as a salt retardant additive, preventing the migration of salts

  • EVA is microporous allowing the wall to breathe

  • Thermal Render is significantly more thermally efficient compared to sand and cement renders

  • Thermal Render combined with DryWall DPC provides a guaranteed solution to rising damp, condensation and mould.

  • A variety of finishes can be applied as a topcoat

  • In areas where old plaster was thick or consisted of multi-coats of render, Thermal Render can be built up in one coat

  • BBA Certificated product as a Thermal Render

  • BBA Certificated product as a damp proof plaster

  • BBA Certificated product as an insulating plaster

  • Energy Saving Trust approved

How it's Applied

1.

Hack off the existing plaster & remove dust from surface.

2.

Apply the EVA Primer to the prepared wall. This prevents salt migration to the new plastering.

3.

Apply the Thermal Render on top of the EVA Primer while this is still wet, building up to match existing finishing thickness.

4.

Once the Thermal Render is set, apply a skim plaster coat.

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