Slate Floor Tile Installation: Indoor vs Outdoor Guide

Installing natural slate floor tiles is straightforward when you follow the right process. Here’s a complete guide covering both indoor and outdoor applications.

Substrate Preparation

For indoor installations, a flat concrete or cement board substrate is essential. Outdoor patios require a properly graded base with adequate drainage. Never skip the waterproofing membrane for wet areas.

Sealing: The Critical Step

Natural slate is porous. Always apply a penetrating sealer before grouting to prevent stains. For outdoor tiles, use a UV-resistant sealer. Reapply every 3-5 years for indoor, 2-3 years for outdoor.

Grouting Tips

Use sanded grout for joints wider than 3mm. For the rustic crazy paving look, a wider joint (8-12mm) with dark grout creates stunning contrast.