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Benefits of rendering external walls

Rendering is an integral part of the building. The durability and appearance of the facade depend on the correct execution of the work.

House rendering – essential protection of every facade

External rendering plays an essential role in building protection – it protect the wall covering from the effects of atmospheric factors, such as precipitation, changing temperatures, wind, and sunlight. In addition, renders protect the wall from mechanical damage, fire, and moisture.

They also improve its thermal insulation properties and make a home more energy efficient. In addition, they can prevent the appearance of unsightly fungi, etc. Before choosing a new render, it is necessary to take into account the external environment where you live and assess what will be the biggest threat to the building in the future.

What render materials effectively protect the building?

Thick-layer renders

Thick-coat render, also known as traditional or cement render is obtained by mixing sand, cement, lime, and water. Such cement based render is used on single-layer walls made of expanded clay or expanded concrete blocks, as well as on three-layer walls with a facade layer made of ceramic blocks or ordinary bricks. Due to their heavy weight and thickness (a layer of such plaster is 2-3 cm), cement or lime render is not suitable for two-layer walls.

Thin layer renders

Thin-coat renders are applied on two-layer external wall insulated with the light-wet method. They are available in a dry mixture mixed with water or a ready-to-apply mass that does not require painting. They are not applied directly to the cavity wall insulation but on a layer of adhesive mortar. House render is applied in one layer, 2-10 mm thick, using a stainless steel float, starting from the top of the wall. External house rendering is the most common method of finishing existing house.

Thin layer renders are offered in many colors and varieties. Mineral render is characterized by high vapor permeability. For this reason, they are recommended for render finish with external wall insulation. Unfortunately, they are not very resistant to water. Such a problem does not exist in the case of acrylic render, which is flexible and protect the wall well from rainwater. Due to its low vapor permeability, such type of render is not applied to mineral wool.

Less popular, due to their higher price, are silicate and silicone renders. They are more durable than mineral and acrylic exterior walls. They boast high resistance to external factors. Thanks to their hydrophobic properties, they do not attract water molecules, make it difficult for dirt to settle, and rainfall contributes to self-cleaning of the existing render.

How to choose the perfect color for your home’s facade?

As it turns out, the color of the render matters not only from the point of view of aesthetics. Keep in mind that dark-colored renders can fade and crack after some time, so if you expose them to prolonged UV radiation (in this case it is worth getting products enriched with inorganic pigments that do not fade). For buildings standing in very sunny places, let’s choose lighter plasters – they will not be as susceptible to surface heating.


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