Impex Stone Mega Charcoal natural stone comes in panels for interior wall cladding. Shades of deep black and charcoal grey.
- 3 pieces per box, covering 4.36 sq. ft. (0.41 m²).
- Install with LTC white or LTC grey adhesive mortar, back-buttering both wall and stone.
⚠️ Slate can oxidize naturally on contact with moisture; a sealer can delay or reduce this, which is not covered by the warranty.
Substrate preparation
- Recommended substrate: lightweight concrete board (DuROCK®, PermaBASE®).
- Mega collection: lightweight concrete, or gypsum with galvanized lath, at any height because of its weight.
- Plywood: asphalt paper then galvanized lath, at any height.
- Filling the lath: allow one extra bag of adhesive mortar per 30 sq. ft.
Quantities
- LTC adhesive mortar: one 50 lb bag covers 40 to 50 sq. ft. with the recommended tools.
Impex Stone’s full installation guide is in the Documents section of this page.
Warranty
Manufacturer’s 10-year limited warranty from the date of purchase, with proof of purchase, when the product is installed in accordance with the National Building Code and Impex Stone’s installation guide. It covers defective materials only (labour excluded), is limited to the original purchaser and excludes, among others, non-compliant installation, wall movement, contact with chemicals, and discolouration caused by water, pollutants or friction. Full terms are in the installation guide.
