PermaRock Exterior Render System (Back-ventilated Render Rainscreen) (Non-Insulated)

Board joints:

PermaRock Joint Masking Tape 060/10: 50 mm wide joint tape with self-adhesive backing, for application across all render board joints to prevent render entry into the joint area.

Movement joints:

Live construction movement joints should be brought through the system. Refer to manufacturer's standard details.

Reinforcement layer:

- Basecoat:

• PermaRock Bedding Mortar - is a high-performance, polymer-modified, cement-based reinforcement layer render supplied as a mineral dry powder pre-mix, requiring only the addition of water and mixing on site. Used in combination with PermaRock Reinforcing Mesh.

- Mesh reinforcement:

• PermaRock Reinforcing Mesh: Alkali-resistant coated, multi-strand glass fibre reinforcing mesh for incorporation into a PermaRock basecoat render (PermaRock Bedding Mortar) to create a reinforced basecoat layer which confers mechanical resistance and dimensional stability to the system.

- Mechanical fixings (anchored reinforcement):

Consult manufacturer for recommendations.

Render/ Finish:

- Top (finish) coat:

Type:

PermaRock Acrylic K-Finish stippled render/ R-Finish corrugated render:

High performance, ready-to-use, through-colour, synthetic resin textured renders reinforced with siloxane to impart improved water repellence. Flexible, weather resistant, water repellent and water vapour permeable.

• Texture: Type ‘K’: Stippled; Type ‘R’: Corrugated.

• Resistance to soiling: Good.

• Colour fastness: Good; colour shade dependent.

• Colour range: Over 1250 standard colours (PermaRock Colour Chart; RAL, NCS, BS 4800, etc.). Colour matching available.

PermaRock Brick Slips:

Lightweight, flexible and breathable, synthetic resin brick tiles used to create a brickwork effect.

Facing brick slips and corner (pistol) brick slips provide a traditional or contemporary brick appearance to wall surfaces. Manufactured from high quality raw materials using modern machinery and the skills of experienced craftsmen, these simulated bricks offer a multitude of outstanding product characteristics.

The brick slips offer flexible application and design features, and are durable, robust, impact resistant and easy to clean. The brick slips are bonded to the primed reinforcement layer using a ready-mixed dispersion adhesive. Joints are subsequently pointed with a coloured, semi-dry synthetic pointing mortar.

• Size: Flat facing bricks: 215 x 65 x 4–6 mm-thick; Corner-facing bricks: 215 x 102 x 65 x 4-6 mm thick. Other sizes available, subject to minimum order quantities.

• Coverage: Flat facing bricks: Approximately 58 per m²; Corner (pistol) bricks: Approximately 13 per metre.

• Resistance to soiling: Very good.

• Colour fastness: Excellent.

• Colour range: 12 standard colours. Colour matching available, subject to minimum order quantities.

• Textures: Flat, textured or sand particle.

PermaRock Mineral K-Finish/ R-Finish Through-colour Textured Renders:

Lime-cement-based, non-combustible, lightweight, ecologically-compatible and cost effective renders providing an economical alternative to synthetic through-colour textured renders (due to low consumption rates and ease of application).

Hydraulically curing materials are based on a white cement and lime binder system with lightweight additives, minimal organic content, and additives to induce water repellency.

• Texture: Type ‘K’: Stippled; Type ‘R’: Corrugated.

• Resistance to soiling: Good.

• Colour fastness: Very good.

• Colour range: Over 900 standard colour shades (lightness factor (LF) ≥30); consult manufacturer's literature for details. For colours with LF 20–30, over-painting with a PermaRock equalising paint is advisable.

PermaRock Silicone ULTRA K-Finish/ R-Finish Through-colour Textured Renders:

Based on a hybrid binder system of organically crosslinked nano-quartz particles and silicone emulsion, offering a self-cleaning effect with enhanced resistance to dirt pick-up and mould/ algae growth, which provides cleaner surfaces for longer than conventional silicone, acrylic or mineral renders.

Lightweight, water repellent, excellent water vapour permeability and can resist aggressive air pollutants. Low environmental impact renders also contain a preservative against coating deterioration due to algae and fungus.

• Texture: Type ‘K’: Stippled; Type ‘R’: Corrugated.

• Resistance to soiling: Excellent.

• Colour range: Over 1000 options, including over 500 ‘A1’ colour shades: PermaRock Colour Chart, RAL (non-A1 shades) and BS 4800 (non-A1 shades). Colour matching service available.

• Colour fastness: ‘A1’ colours provide excellent resistance to colour fade and chalking. Colour fastness of non-A1 colours is dependent on the colour shade selected.

Beads/ Trims/ Profiles:

Render-only beads, including verge trims, top trims, starter tracks, full system stop beads, render stop beads, window sealing strips (reveals beads), movement joint beads/ profiles for vertical and horizontal joints. Sealing tapes and expansion joint tapes. All as system manufacturer’s or architect’s details, to be supplied by PermaRock.

Additional requirements:

• Specify movement joint trims, etc. or refer to detail drawings.

• Specify areas for additional reinforcement mesh e.g. at locations prone to greater risk or intensity of impact, etc.

• Provide details of brick coursing, bond and features to quoins, door/ window heads and raised feature bands or margins around doors/ windows etc., or refer to drawings.

• Provide details of colour changes, panelization/ faux joints, etc., or refer to detail drawings.