DECKO Flexistone - Installation & Support Guide

DECKO Flexistone

Installation & Support Guide

Bring the natural beauty of stone to your home or commercial space with DECKO Flexistone — lightweight, flexible stone panels designed for easy DIY installation, indoors or out. Available in three ranges to suit different needs and aesthetics:

Product Ranges

Brico Range

Self-adhesive backing, interlocking design (approx. size: 4 bricks stacked offset)

Pietra Range

900 × 300 mm panels — no adhesive backing

Grande Range

1200 × 600 mm panels — no adhesive backing

Installation Guide

Step-by-step instructions for professional results

Substrate Requirements

Internal:

Suitable surfaces: Plasterboard, MDF (dry areas only), compressed fibre cement sheeting, brick, or concrete
Surface must be flat, clean, and dry

External:

Suitable surfaces: Compressed cement sheeting, exterior-grade plywood, brick, or concrete
Self-adhesive Brico panels not recommended outdoors
Priming may be required for porous or dusty surfaces

Cutting

Utility knife: For straight cuts (score multiple times)
Jigsaw or fine-toothed circular saw: For curves or high precision

⚠ Safety Warning - Silica Dust

Flexistone panels contain cement-based materials. Cutting may release respirable crystalline silica dust, which can be hazardous if inhaled.

Always follow these safety precautions:

Wear a P2 / N95 dust mask or respirator suitable for silica dust
Use safety goggles to protect eyes from fine particles
Wear gloves and long sleeves
Cut in a well-ventilated area, preferably outdoors
Use dust extraction or vacuum where possible

Corners & Edges

No pre-formed corner trims included

At external corners installers typically:

Butt the two corner panels together and the small gap that remains thanks to the slim panel thickness should be filled with colour-matched silicone or suitable sealant for a clean, finished appearance.
Use metal or colour-matched architectural trims

Window and door openings: Cut panels to fit and finish with sealant or trim

Adhesive Recommendations

Application	Product	Notes
Internal	Liquid Nails HD, Soudal Fix All	Brico range: uses self-adhesive tape (dry areas only)
External	Sikaflex 11FC, Bostik Seal N Flex FC	Only for Pietra & Grande ranges — NOT Brico
Tiling Glue	ARDEX X 18 Fibre Reinforced Flexible Tile Adhesive	It’s a cement-based mortar adhesive.
Temporary fixing	Double-sided high-bond tape	For dry internal walls (Pietra/Grande only)

💡 Pro Tip

For vertical applications, use bracing or painter's tape to hold panels until adhesive sets.

Spacing & Grouting

Panels are typically butt-jointed for seamless look
Grouting is not required
Optional: use colour-matched flexible sealant between joints for water resistance or aesthetics (especially outdoors)

Expansion Movement Notes

Flexistone panels may experience minor thermal movement due to temperature and humidity changes. When installed using construction adhesive or polymer-modified tile adhesive, movement is distributed across the adhesive layer and remains minimal.

A 1–2 mm expansion gap between panels is recommended to accommodate natural movement and ensure long-term stability. For large wall areas or exterior installations, small perimeter movement gaps should also be maintained where panels meet fixed building elements.

Care & Maintenance

Keep your Flexistone looking great for years to come

Cleaning

Use soft cloth or sponge with mild detergent
Avoid high-pressure water jets (especially on joints)
Do not use abrasive scrubbers or acidic cleaners

Outdoor Maintenance

Check joints annually and reseal if needed
Ensure proper drainage to avoid water pooling

Repairs

Individual panels can be removed and replaced if damaged
Use same adhesive and sealant type for replacements

Tips & Warnings

Important information for successful installation

⚠ Outdoor Use Warning

Do not use Brico range panels outdoors — tape adhesive may fail in moisture or UV exposure

✓ Substrate Preparation

Always ensure substrate is level and structurally sound before installation

⚠ Fireplace Safety

For fireplace surrounds, do not install in direct contact with flame or high heat zones

✓ Storage

Store panels flat in a cool, dry space prior to install

Need Help?

If you have further questions about your DECKO Flexistone installation or product selection, don't hesitate to contact our support team