External Rendering

TYPES OF RENDER OFFERED:

– Traditional Sand/Cement Renders

– Coloured Renders,

– Acrylic Renders,

We have a selection of different types of external render and decorative finishes to protect and enhance the appearance of your home. They range from the traditional sand/cement render which can be painted, to modern coloured renders that don’t require painting.

Traditional sand/cement renders

Traditional renders consist of sharp washed sand, Portland cement and hydrated lime. The proportions of each depend on the type of wall and level of exposure to weather.

Stainless steel or plastic rendering beads are fixed to corners for protection; bellcast beads are fixed above damp proof course, windows and doors to protect them, and to deflect rainwater.

Coloured renders e.g. K Rend

‘Through colour’ renders are premixed bags of render, which are pre-coloured during manufacture. These renders are particularly appealing as they do not require painting and offer long-term protection on a broad range of surfaces.

Coloured renders consist of graded aggregates; white Portland cement, lime, polymer admixtures, silicones and a colour pigment. The silicone repellents are an integral part of the render, as they repel water from the surface whilst allowing water vapour to pass through and let the substrate breathe, reducing condensation.

The renders come in a wide range of colours and can be finished in different textures, from a flat-sponged float finish or a rougher scraped finish and pebbledash.

Colour PVC corner beads and stop beads can be used to match the render or provide a contrast.

Acrylic Render

Acrylic renders are becoming very popular; recently they were used on the Sugar Cube development in Bristol, featured on Grand Designs.

Acrylic render is factory premixed, it consists of aggregates (sand) ranging from 1mm to 3mm in size and acrylic resin as the main binder, not cement. This makes it a flexible and crack resistant finish that can be applied to new or existing render. Ideal for refurbishment giving tired and dull looking structures a new lease of life, and available in a wide range of colours and textures.

Acrylics have exceptional weather proofing properties; they are vapour permeable reducing condensation, and have self-cleaning properties for low maintenance.

TYPES OF RENDER FINISH:

Smooth finish

Render is applied in 2 coats. Topcoat is ruled flat, then floated and sponged to a smooth finish.

Tyrolean finish

A textured finish, render is applied in 3 coats. The top Tyrolean coat is applied with a machine; several layers are applied to create a ‘honeycomb finish’.

Pebbledash (also known as dry dash)

Pebbledash is achieved by throwing decorative stones (3-8mm) or chippings on to a wet topcoat. Coloured stones/renders can be used to create attractive finishes.

       

Roughcast (also known as wet dash)

Roughcast is a coarse durable finish applied in 3 coats. The top roughcast coat is a wet slurry mix of sand/cement/stone that is thrown onto the render.

Scraped textured finish

Scraped textured finish is applied to coloured renders. When the render is almost set a scraping tool is used to remove 2mm from the surface, creating a textured finish.

RENDERING BEADS

Metal or plastic beads are fixed to the building during the rendering process to produce a straight edge and provide protection to the render against impact.

Here are some examples:

Corner Bead

Used on corners produce a straight edge and provide protection against impact.

Bellcast Bead

Designed to provide a stop to the render just above the damp proof course and above reveals to produce a straight edge, provide protection against impact and deflect rainwater.

Stop Bead

Designed to provide a stop to the render at window and doorframes and at changes to the facade to produce a straight finish and protection against impact.