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Rendering

SUPER RENDER CONTINUES A PROUD RENDERING TRADITION WITH NEW, INTEGRATED TECHNOLOGIES

Rendering is one of the oldest and more traditional practices in construction but has evolved vertiginously on the past decade. Its main function is to protect the substrate where it is being applied and equalize its surface in order to provide a better finish itself or set the tone for painting/ texture. At the beginning the common practice would be only Lime or Sand & Cement render but now the market allows plenty of new technological process as acrylic, polymer and texture rendering.

Rendering is one of the oldest and most traditional practices in building construction and finishing.  However, the last 20 years have seen it evolve and improve almost beyond measure. Its main function has always been to protect the building’s substrate against weathering and degradation, with a secondary purpose of homogenising the outer surface for improved aesthetics and ease of painting and applying textures.

Ancient rendering relied on crude mixtures of mud and animal dung to achieve something approaching a uniform surface. With the introduction of lime, and later sand and cement combinations, renderers achieved more consistent, stable, and durable finishes.

Today, research and development in chemistry at nanometric level, combined with alternative lightweight reinforcing meshes and rapid application techniques, give modern owners, builders, and facade specialists many more options.

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Acrylic/polymer renders

Acrylic/polymer renders are manufactured using specially blended mineral fillers and additives. Their inorganic chemical systems allow for vastly improved flexibility and crack resistance over traditional renders. These are some of the advantages these renders offer:

  • Superior adhesion to the substrate
  • Easier and more consistent handling and quality with measured, pre-mixed bags
  • Improved abrasion resistance
  • Faster curing (two days, compared with 28 for sand and cement)
  • Suitable for a wide range of substrates including: clay and cement bricks/ blocks; autoclaved aerated concrete (AAC) panels and blocks (Hebel and others); fibre cement sheets (Blueboard and similar); expanded polystyrene sheets (EPS); PVC walling systems (Dincel and others); cement waterproofing membranes and most painted surfaces.

Sand and cement render

Sand and cement rendering is our most traditional process. We recommend its application on prepared coarse and rigid substrates like brickwork, cement block work, or porous stone walls.

It is one of the most cost-effective render finishes, but its quality relies heavily on the renderers’ skill and experience since all materials are mixed on site. Its advantages are:

  • Low cost
  • Excellent for both exterior and interior facade protection
  • Outstanding coverage for fixing walls to receive joinery and tiles.

Texture coatings

Texture coatings are pure acrylic/polymer renders that offer both smooth and granular finishes for a beautiful and timeless appearance. They come in two versions, coloured and nude. Up to twenty times thicker than paint, the coloured texture is a finished product (does not require painting) that provides a flat, natural, sandy finish from fine to coarse and robust protection with a warranty of up to 10 years.

The nude texture coat has the same properties as the coloured version but needs to be painted with two top coats of elastomer membrane (see Painting and coatings). These extra coats over the texture form what is called Full System or Five Coats System, one of the most reliable rendering systems on the market, with a 15 year warranty. Its advantages are:

  • Highly crack resistant
  • Excellent weather resistance
  • Fully warranted system.

Gypsum plaster/white set

Also known as white hard-set, this general-purpose product is designed to provide a tough, smooth abrasion-resistant finish over masonry, concrete, autoclaved aerated concrete (AAC panels), plasterboard, or other rendered surfaces.

It is a setting compound mixing lime and gypsum to give a smooth and durable internal finish. It also allows for a hard, white and blemish-free surface delivering:

  • A polished lustre due to its fine aggregate composition
  • Potential for artistic finishes with wax polishing (see Decorative finishes)
  • High end internal finish.

Lime render

First used in the days of the ancient Roman empire, lime is still used today to preserve the originality of valued historical and heritage buildings.

Preparation and application techniques require highly skilled artisanship, with variable mortar ratios designed to reflect the exact characteristics of each specific project. Lime offers:

  • Timeless historical preservation
  • A wholly natural material
  • Breathable coating allowing the building to regulate humidity and temperature.

Decorative and special coatings

Decorative and special finishes started as a rendering niche 10 years ago but grew so much that today it is considered a discipline in its own right. Super Render’s own expansion reflects this development, with our own dedicated division. Find out more on our Decorative finishes page.