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Unvented EWI Systems

Explore our selection of Unvented EWI Systems, including  the most popular Insulated Render systems.

Unvented External Wall Insulation Systems (EWI) involve fixing the insulation to the building's exterior,
and the protective, weatherproof finishing layer is then installed straight onto the insulation, forming a continuous barrier with no cavity,
creating a continuous thermal layer that eliminates cold spots and ensures a thermal bridge-free facade

The final weather barrier is provided by a robust, aesthetically pleasing topcoat, such as flexible, thin coat render:
- Silicone
- Acrylic
- Silicate
- Mineral
or with Brick or Stone Slips or Tiles.

Types of insulation used in those systems:

- fire-resistant Rock Wool
- cost-effective EPS Polystyrene (white or grey)
- highly efficient Phenolic 
- water-resistant XPS Polystyrene (usually below DPC level)

 

Choose subcategory or scroll down to see products

Brand: Wemico Model and Size: 90602
Delivery Time: 1 - 2 days
A box shaped base profile for 20mm thermal insulation board - also available in Stainless Steel. Larger sizes can be made to order. Connectors and render clips are also available to suit this product...
£7.00
£8.40 inc VAT
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Brand: Wemico Model and Size: 37404 6mm
Delivery Time: 1 - 2 days
6mm render thickness PVC clips with mesh wing designed to suit base profiles. Also available in aluminium and stainless steel, please contact us for more details...
£7.38
£8.86 inc VAT
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Brand: Arbet Model and Size: 1000x500mm - 30m2
Delivery Time: In Stock 1-2 working days
10mm Grey Polystyrene (Graphite) is a high quality expanded polystyrene (EPS) board enhanced with integrated graphite within its bead structure and of grey colour. The high-purity graphite particles integrated within the insulation beads reflects radiant heat and significantly improves insulation ca..
£39.33
£47.20 inc VAT
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Brand: Kingspan Model and Size: 1200mm x 400mm - 8.64m2
Delivery Time: In Stock 1-2 working days
20mm Kingspan Kooltherm K5 External Wall Insulation Board is a premium performance external wall insulation board specifically designed for masonry walls. It features a rigid phenolic foam core, providing exceptional thermal insulation properties that help reduce energy consumption and enhance the o..
£144.00
£172.80 inc VAT
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Single Board 20mm Kooltherm K5 External Wall Insulation Board Kingspan - 1200mm x 400mm Single Board 20mm Kooltherm K5 External Wall Insulation Board Kingspan - 1200mm x 400mm
Guide Price
Brand: Kingspan Model and Size: 1200mm x 400m - 0.48 m2
Delivery Time: In Stock 1-2 working days
20mm Kingspan Kooltherm K5 External Wall Insulation Board is a premium performance external wall insulation board specifically designed for masonry walls. It features a rigid phenolic foam core, providing exceptional thermal insulation properties that help reduce energy consumption and enhance the o..
Guide Price: £9.80
£11.76 inc VAT
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Brand: Rockwool Model and Size: 1000mm x 600mm - 4.80m2
Delivery Time: 1-3 working days
20mm Rockwool Frontrock S is a rigid high density thermal and acoustic insulation slab made from volcanic rock, thus extremely durable, fire resistant and specifically created for external wall applications to go directly under render. Using Frontrock S you can be sure that the facade will be durabl..
£40.33
£48.40 inc VAT
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Ceresit CT84 Express - Foam Adhesive for Internal and External Wall Insulation Boards
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Brand: Ceresit Model and Size: CT84
Delivery Time: In Stock 1-2 working days
Ceresit CT84 Express is a one-component low expansion polyurethane adhesive for fixing an External Wall Insulation boards (Phenolic, PIR, Expanded Polystyrene) and also plasterboards in drylining. Approximately 2 hours after application, the insulation boards may be smoothed, anchored and, then the ..
£12.71 (£15.25 inc VAT)
£11.82
£14.18 inc VAT
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Brand: Ceresit Model and Size: Ceresit PU
Delivery Time: In Stock 1-2 working days
Ceresit Profi cleaner is used for removing fresh foam spots and cleaning the applicator.Cleaning of the applicator is necessary if:difficulties have been experienced while using a gun gun has not been used for more than 1 monthafter removing the can from the gun without replacing it with a new ..
£10.59
£12.71 inc VAT
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Ceresit ZU Insulation and Mesh Adhesive and Base Coat Render for Insulated Render Systems
SALE!
Brand: Ceresit Model and Size: ZU-25kg
Delivery Time: 1 - 2 days
Ceresit ZU Insulation and Mesh Adhesive + Basecoat for Insulated Render Systems is a cement-based, polymer-modified adhesive specifically designed for fixing white or graphite expanded polystyrene (EPS) or phenolic insulation boards to exterior walls and making a reinforced basecoat. The EPS bo..
£14.88 (£17.86 inc VAT)
£13.84
£16.61 inc VAT
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Ceresit CT87 White Adhesive-Filler Mortar 2 in 1
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Brand: Ceresit Model and Size: CT87
Delivery Time: In Stock 1-2 working days
Ceresit CT87 mortar is designed to insulate external walls of the buildings by application of external thermal insulation composite system using EPS- or mineral wool facade boards. It is an element of following ETICS from Ceresit Ceretherm Premium, Express and Wool Premium. CT 87 mortar is used for ..
£27.20 (£32.64 inc VAT)
£25.30
£30.36 inc VAT
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Brand: Klimas W-M Model and Size: 70mm
Delivery Time: 1 - 2 days
70mm Universal Insulation Panel Fixing with Metal Pin LMX10 is for fixing 10mm thick polystyrene, mineral wool and phenolic external insulation on concrete, brick, light and autoclave concrete substrates. The anchor is made of polypropylene and is impact resistant. The expander pin is made of zinc c..
£38.00
£45.60 inc VAT
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Brand: Koelner Model and Size: 70mm x 10mm- Free Delivery
Delivery Time: 1 - 2 days
70mm Plastic insulation panel fixings are used for fixing rigid and semi-rigid insulation boards to external solid walls. Plug and nail are made from polypropylene, the nylon nail is reinforced with glass fibre. These plastic panel fixings offer high fixing thicknesses and no thermal bridg..
£39.53
£47.44 inc VAT
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Brand: Klimas W-M Model and Size: 60mm - Free Delivery
Delivery Time: 1 - 2 days
TD060 Nylon Support Disc for Polystyrene, Mineral Wool and Lamella Mineral Wool external wall insulation, to be mounted with a galvanized steel screw. The disc has a stopper, which is used to plug the hole, covering the screw and preventing thermal bridging.CHARACTERISTICSImpact resistant nylon disk..
£25.15
£30.18 inc VAT
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Brand: Protektor Model and Size: 1m x 50m (50m2)
Delivery Time: 1 - 2 days
Fiberglass reinforcing mesh is coated with acrylic acid copolymer liquid and is therefore water, alkali and age resistant. The mesh has high tensile strength, good dimensional stability, good elasticity, capillary action and corrosion resistance.CHARACTERISTICSExcellent stability, strength and cohes..
£39.80
£47.76 inc VAT
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Ceresit CT325 Glass-Fibre Mesh (roll) Ceresit CT325 Glass-Fibre Mesh (roll)
SALE!
Brand: Ceresit Model and Size: 1.1m x 50m - 55m2
Delivery Time: In Stock 1-2 working days
Ceresit CT325 Glass-Fibre Mesh is a high-quality, alkali-resistant glass-fibre reinforcing mesh designed for use with Ceresit exterior insulation and finishing systems. This durable mesh provides enhanced tensile strength and crack resistance to the overall system, helping to prevent the formation o..
£65.20 (£78.24 inc VAT)
£60.64
£72.77 inc VAT
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Brand: ZVM Model and Size: 2.5m
Delivery Time: 1 - 2 days
Plastic corner bead with fibreglass mesh for insulated rendersAPPLICATIONExternal wall insulation systemsMineral, acrylic, silicone and silicate rendersCorners and around recessed windows ..
£2.45
£2.94 inc VAT
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Brand: Ceresit Model and Size: 3.33L - 5kg
Delivery Time: In Stock 1-2 working days
Ceresit CT16 is a high-performance, water-based primer designed to prepare surfaces for the application of Ceresit renders and coatings. This versatile primer enhances the adhesion and coverage of the subsequent render or coating, ensuring a durable, long-lasting finish. It is suitable for use on a ..
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Ceresit CT137 Mineral Render 1.5 mm grain (stone texture)
SALE!
Brand: Ceresit Model and Size: CT137
Delivery Time: In Stock 1-2 working days
Ceresit CT137 is a cement-based, mineral render that is commonly used as a decorative facade render within Ceresit's ETICS (External Thermal Insulation Composite Systems). It is designed to be applied as the base coat and finishing render over EPS (Expanded Polystyrene) boards or mineral wool insula..
£38.00 (£45.60 inc VAT)
£35.34
£42.41 inc VAT
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Brand: Ceresit Model and Size: CT34 - 25kg
Delivery Time: 7 - 10 days
Ceresit CT34 Smooth Mineral Render White is a high-performance, cement-based render designed for interior and exterior applications. Formulated with carefully selected mineral aggregates, this render provides a smooth, uniform finish that is both durable and aesthetically pleasing. The render applie..
£38.00
£45.60 inc VAT
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Brand: Ceresit Model and Size: 1.5mm CT74 - 25kg
Delivery Time: In Stock 1-2 working days
Silicone Render Ceresit CT74 - 1.5mm grain - Self Clean is a premium, silicone-modified, thin-layer exterior render with advanced self-cleaning properties. It is formulated to provide exceptional weather protection and a long-lasting, attractive finish for exterior walls. The silicone technology giv..
£55.46
£66.55 inc VAT
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Ceresit CT174 Silicate-Silicone Aquastatic Render 1.5mm grain
SALE!
Brand: Ceresit Model and Size: CT174 - 25kg
Delivery Time: In Stock 1-2 working days
1.5mm grain Ceresit CT174 Silicate-Silicone Render is a high-performance, exterior thin-layer decorative render. It is particularly recommended for use as a facade render within Ceresit ETICS (External Thermal Insulation Composite Systems), where it can be applied over EPS (Expanded Polystyrene) boa..
£58.00 (£69.60 inc VAT)
£53.94
£64.73 inc VAT
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Ceresit CT72 Silicate Render - 1.5 mm grain
Guide Price
Brand: Ceresit Model and Size: CT72
Delivery Time: 5 - 7 days
Ceresit CT72 Silicate Render is a high-performance, ready-to-use mineral-based render designed for decorative façade finishes. It provides excellent vapour permeability, making it ideal for exterior walls that require breathability. CT72 offers high resistance to weather conditions, UV rays, and bio..
Guide Price: £55.10
£66.12 inc VAT
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Brand: Wemico Model and Size: 93304
Delivery Time: 1 - 2 days
Aluminium Stop Track Profile for thermal insulation systems with render, designed for 40mm thickness of insulating board. These profiles can be powder coated to any standard RAL colour...
£114.93
£137.92 inc VAT
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25mm Undersill Flashing and Window Sill Extensions (with full end caps-pair) - 2.5m Length 25mm Undersill Flashing and Window Sill Extensions (with full end caps-pair) - 2.5m Length
Guide Price
Brand: Wemico Model and Size: WEC731/25
Delivery Time: 1 - 2 days
25mm Undersill Flashing and Window Sill Extension is suitable for most conditions requiring the weathering of External Wall Insulation Systems and Rendering. Aluminium White Coated with peel-off low tack film to protect the section during transportation and fixing on-site. Jointing pieces to suit an..
Guide Price: £22.18
£26.62 inc VAT
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Brand: Wemico Model and Size: C2
Delivery Time: 1 - 2 days
2mm Render Only PVC Corner Bead for external insulation systems. Drip bead and movement bead for render are also available to suit this product.Available colours: White..
£60.97
£73.16 inc VAT
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Brand: Wemico Model and Size: M4
Delivery Time: 1 - 2 days
A PVC movement bead used where the underlying substrate changes, or where minor movement in the structure beneath the render is expected.  ..
£46.19
£55.43 inc VAT
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Brand: Wemico Model and Size: P4
Delivery Time: 1 - 2 days
4mm PVC Render Stop Bead is used on door and window openings also at base of wall and ceiling level. It is designed to deliver a clean edge, protect and finish plaster and render edges. 25mm Wing..
£41.15
£49.38 inc VAT
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Brand: Wemico Model and Size: R4
Delivery Time: 1 - 2 days
4mm PVC Render Stop Bead is used on door and window openings also at base of wall and ceiling level. It is designed to deliver a clean edge, protect and finish plaster and render edges.  ..
£41.27
£49.52 inc VAT
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50mm CTP Insulation Panel Fixings (pack of 300)
Guide Price
Brand: Friulsider Model and Size: 50x4.5mm CTP - Free Delivery
Delivery Time: 1 - 2 days
50mm CTP Insulation Panel Fixings for rigid and semi-rigid insulating boards and panels. APPLICATIONWood, Panels & sheets..
Guide Price: £64.76
£77.71 inc VAT
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Brand: Jablite Model and Size: Jablite 40mm - 10.80m2
Delivery Time: 3 - 4 days
40mm Jablite External Wall Insulation Board is a very lightweight and easy to handle and install EPS 70wall board containing a flame-retardant additive, designed to be used as a part of various external wall insulation systems. It can be bonded or mechanically fixed to the wall. Installing insulatio..
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