How to install McMonagle Stoneer Cladding

McMonagle Stoneer offers a simple, efficient way to achieve the look of full-thickness natural stone. Follow our step-by-step guide to estimate and install our 30mm cladding system.

    Natural Stone Cladding Made Easy  – DIY Installation Guide

    McMonagle Stoneer Cladding is a 100% natural stone system designed to replicate the look of full-thickness stone at just 30mm depth. Suitable for both interior and exterior applications, it offers a lightweight, cost-effective, and easy-to-install solution for transforming walls and facades.

    Available in a range of premium materials including Quartzite, Sandstone, Slate, and Limestone, Stoneer cladding is supplied in flat pieces and L-shaped corners, ensuring a seamless and professional finish

    1. Estimating Materials

    Flats (Wall Area)

    To calculate the amount of flat stone required:

    • Measure height × width of the area
    • Subtract openings (windows, doors, etc.)
    • Total = required coverage in square metres (m²)

    Flats are sold per m².

    Corners

    To estimate corner pieces:

    • Measure all external vertical corners (e.g. wall edges, window and door reveals)
    • Total = required length in linear metres

    Corners are sold per metre.

    Adhesive / Mortar

    We recommend Ardex X7G Plus Adhesive for installation.

    • Allow approximately 1 bag per 3m² of flat stone
    • For corners: multiply total linear metres by 0.2 to estimate additional bags
    • Note: Usage may vary depending on stone type and substrate

    2. Surface Preparation

    New Blockwork

    • No major preparation required
    • Apply a scratch coat with water proofer (especially for chimney stacks)

    Existing Surfaces

    • Remove existing finishes by:
      • Sandblasting
      • Water blasting
      • Acid etching
      • Wire brushing
    • Alternatively, fix a metal lath and apply a scratch coat

    Uneven or Rough Surfaces

    • Apply a scratch coat to create a level base before installation

    3. Installation Guide

    Step 1: Pre-Application Setup

    • Open multiple boxes and mix stone pieces for a natural blend
    • Lay out stones to plan variation in colour, shape, and size
    • Avoid clustering similar tones together

    Step 2: Install Corner Pieces First

    • Start at corners and work toward the centre
    • Alternate long and short returns for a natural appearance

    Application:

    • Lightly dampen the back of each stone
    • Apply approx. 10mm of adhesive to the back
    • Press firmly onto the wall with a slight twist
    • Remove excess mortar before it sets

    Keep joints consistent and relatively narrow for best results.

    Step 3: Fit Flats & Grout Joints

    • Continue placing flat stones, filling gaps as needed
    • Use smaller pieces to fill irregular spaces

    Step 4: Final Cleaning

    • Use a medium bristle brush to remove dust and debris
    • Avoid excessive water during early curing stages

    4. Pro Tips for Best Results

    • Work in manageable sections
    • Regularly step back to check alignment and variation
    • Cut stones as required for a tight, professional fit
    • Protect installed areas from heavy rain or frost during curing.

    McMonagle Stoneer Cladding offers a fast, efficient, and visually striking way to achieve the look of natural stone walls. With proper preparation and installation, you can create a durable and timeless finish suitable for any project.

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