What is EPS insulation made from?

EPS insulation is made from expanded polystyrene beads that are fused together to form rigid boards. This composition gives EPS its strength, durability and excellent thermal performance, making it ideal for use in residential, commercial and industrial insulation projects.

Where can EPS insulation be used?

EPS insulation is suitable for both external and internal wall insulation. It can be applied to masonry, timber and system-built properties, as well as used beneath renders or within cavity wall insulation systems. Its versatility makes it a popular choice for new-build and retrofit projects alike.

How is EPS insulation installed?

EPS boards are typically installed using a dual fixing method, adhesive and mechanical fixings, to ensure a secure hold. For best results, we recommend using EWI-220 EPS Basecoat Adhesive, a specially formulated product designed to bond EPS insulation boards securely to masonry and other substrates. Once the boards are fixed, they should be covered with a basecoat and reinforcing fibreglass mesh. The surface should be rasped or sanded before applying the basecoat to create a better key for adhesion. EPS can be finished with EWI-075 Silicone Render or EWI-040 Acrylic Render, both of which complement its non-breathable nature and provide a durable decorative finish.

Can EPS insulation be used internally?

Yes, EPS can also be used for internal wall insulation. However, external wall insulation generally achieves better results by preventing thermal bridging and reducing the risk of internal condensation.

Why is EPS insulation cost-effective?

EPS insulation offers exceptional performance at a lower price point compared to many other materials. Its lightweight structure means it requires less adhesive strength and uses plastic fixings rather than metal, reducing both material and labour costs without compromising quality.

What is the difference between EPS and XPS insulation?

EPS (Expanded Polystyrene) and XPS (Extruded Polystyrene) are made from the same base resin but produced using different processes. EPS is lighter, more affordable and ideal for wall insulation. XPS is denser and stronger, making it better suited for below-ground or flooring applications. Both materials deliver excellent thermal performance, but EPS is often preferred for external wall insulation systems due to its cost-effectiveness and ease of installation.

Is EPS insulation waterproof?

Yes, EPS insulation is highly water-resistant. It helps protect your property against damp and mildew, maintaining a healthy wall structure. For added protection, you can pair EPS insulation with a waterproof render such as Nano Drex Silicone Render or Premium Bio Silicone Render to enhance weather resistance.

Lime Wash (EWI-707) - 10L

Brand: EWI Pro

SKU: EWI-707-10

£95.99 Incl. VAT

£95.99 Incl. VAT (regular price)

Please note: This product has a slightly longer lead time. Our team wiil notify you with an estimated delivery date.

Quantity:

Lime Wash (EWI-707) - 10L

EWI-707 Lime Wash is primarily a protective layer for lime coatings and masonry substrates. On new lime renders and plasters, it unifies and protects the surface whilst the new plaster is building strength. As lime wash is essentially diluted lime putty, it maintains all breathable qualities, contributing to a fully breathable lime system. EWI-707 Lime Wash is also a repairing material, being used to fill small shrinkage cracks on the lime coverings. Lime wash can also be used in conjunction with various aggregates to make shelter coats for friable masonry and will act as a sacrificial protective coat. Historically, lime wash was used as the primary decorative coat, however, it has been superseded by lime paint in that department.

Intended Uses

Specially designed for exterior restoration projects, Bio-construction, and all kinds of decorative work, generating healthy and highly comfortable environments. Compatible with classical and current construction methods and materials from the chemical, structural and mechanical points of view, adopting a harmonious behaviour with the rest of the materials.

Substrate Preparation

The substrate must be firm, dry and clean; free of poorly adhered parts, previous applications of grout, water repellents, release agents, mould release agents or waxes, rust, oils, grease, dust, efflorescence, microorganisms (mould or verdigris), traces of pollution, construction material or any element that prevents the excellent adherence of the product to the support. Avoid treating with a chemical medium; if a chemical medium has been used, rinse thoroughly with water and allow it to dry.

Product Preparation

The product comes ready to use. It is essential to stir the paint at low speeds before use until it is completely homogeneous.

Application

Apply with a roller, brush or air-less gun. Apply wash by loading the surface in even coats. It is recommended to apply a minimum of two coats. The final appearance will vary depending on the tool used in the application and the absorption of the support.

Storage Conditions

This product comes in powder form in a 10L Jerry Can. Store in a cool, dry place. Avoid ingress of water. Shelf life: up to 12 months from the date of manufacture.

Frequently Asked Questions

EWI-707 Lime Wash is a protective and breathable coating designed for use on lime renders, lime plasters and masonry substrates. It unifies and protects new lime surfaces while allowing them to strengthen naturally. Lime wash also helps fill small shrinkage cracks and can be used to create a sacrificial protective layer for friable masonry.

Yes. As it is made from diluted lime putty, EWI-707 Lime Wash maintains all the breathable qualities of lime. This allows moisture to escape freely from the substrate, helping to prevent damp, mould and condensation.

EWI-707 Lime Wash is suitable for exterior use on lime-based renders, plasters and masonry. While primarily used externally, it can also be applied indoors on compatible lime surfaces for a natural, traditional finish.

EWI-707 comes ready to use in a 10-litre jerrycan. Stir the product thoroughly at low speed before use. Apply using a brush, roller or airless spray gun, ensuring even coverage. A minimum of two coats is recommended for a consistent and durable finish.

The substrate must be clean, dry and free from dust, grease, efflorescence or loose materials. Avoid chemical cleaning products; if they are used, rinse thoroughly with water and allow the surface to dry before application.

Traditionally, lime wash was used as a decorative coating, but it is now mainly used as a protective finish. For a more decorative or coloured surface, we recommend EWI-705 Lime Paint, which offers a longer-lasting and more vibrant finish while maintaining breathability.

Store in a cool, dry place away from frost and direct sunlight. Keep the container sealed when not in use. The product has a shelf life of up to 12 months from the date of manufacture.

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