The Best Outdoor Porcelain Tile Pedestal System Guide
03/07/2026
Outdoor tile pedestal systems are one of the fastest‑growing ways to build beautiful, level patios, balconies, and roof terraces without wet mortar or complex groundwork. At Pro Tiler Tools, we understand that successful projects depend not only on quality materials but also on using the right tools and accessories. This guide explains how porcelain tile pedestal systems work, their benefits, and the tools that help you achieve professional results efficiently and safely.
What is an Outdoor Porcelain Tile Pedestal System?
An outdoor tile pedestal system is a raised, dry‑laid substructure that supports 20 mm outdoor porcelain tiles on adjustable or fixed pedestals instead of traditional tile adhesive or mortar beds. The tiles rest on the heads of pedestals, creating a level, ventilated deck above the waterproofing or sub‑base.
Outdoor porcelain tile pedestal systems are widely used in rooftop decks, residential patios, commercial terraces or pool surrounds.
Explore swimming pool materials today!
Benefits of Outdoor Porcelain Tile Pedestal System
For homeowners, architects, and installers, pairing porcelain with pedestals offers a strong mix of performance and aesthetics:
1. Superior Drainage Performance
Unlike traditional mortar-set installations, pedestal systems allow rainwater to drain through the open joints between tiles and flow beneath the surface. This helps reduce standing water and minimises the risk of water-related damage.
2. Perfect Surface Leveling
Outdoor surfaces often contain slopes or uneven areas. Adjustable pedestals combined with leveling accessories such as levelling clips, tile wedges, spin caps allow tilers to create perfectly flat walking surfaces without extensive substrate preparation.
3. Fast Installation
Because no tile adhesives or tile grout are required, installation can be completed significantly faster than traditional paving methods. Using professional pedestal adjustment tools can further accelerate the process while ensuring precise height settings.
4. Easy Access to Utilities
One of the biggest advantages of raised flooring systems is accessibility. Installers can lift individual tiles to access:
Drainage systems
Irrigation lines
Electrical wiring
HVAC components
This makes maintenance and repairs much simpler.
5. Long-Term Durability
Porcelain pavers offer exceptional resistance to:
UV exposure
Frost and freeze-thaw cycles
Moisture
Stains
Heavy foot traffic
When paired with high-quality pedestal supports, they provide decades of reliable performance. Also consider tile sealers and tile cleaners for keeping your tiles looking new.
Types of Tile Pedestals
There are two pedestal types that are suitable for different purposes:
Best for small areas with relatively consistent height.
Lower cost but limited flexibility.
£4.42 INC VAT
£9.46 INC VAT
£34.01 INC VAT
£13.24 INC VAT
Self‑levelling head pedestals
Built‑in tilting heads automatically compensate for falls in the substrate.
Ideal where waterproof membranes must remain sloped for drainage, but the tile surface must be level.
£141.11 INC VAT
£152.45 INC VAT
£149.93 INC VAT
£154.36 INC VAT
How to Plan a Tile Pedestal System
Step 1 - Survey and Measure
Establish the lowest and highest points of your substrate using a laser level. Calculate the minimum and maximum pedestal heights needed. Add a safety margin of 20mm to each end to allow for adjustment during installation.
Step 2 - Lay Out the Grid
Sketch a tile layout plan on graph paper or in a simple CAD tool. Pedestals are positioned at each tile corner, meaning they are shared between up to four tiles. For a 600×600mm tile on a standard grid, pedestal centres are at 600mm intervals in both directions.
Mark any cuts, drainage channels, or service access points with chalk lines or marking paints. Tiles over service hatches may need to be removable - don't bond these with tile adhesive.
Step 3 - Specify the Right Tiles
For outdoor pedestal applications, always use 20mm-thick porcelain. Thinner tiles (10mm or 12mm) lack the flexural strength to span between supports and risk cracking under point loads. Don’t forget to check the declared breaking load. According to Infinity Lab, Group BIa fully vitrified porcelain tiles are required to have a minimum breaking strength of ≥ 1,300 N for residential use; between 1,500N and 3,000N for commercial use under the ISO 13006 / EN 14411 standard.
Read More:
How To Cut 20mm Porcelain Tiles | Best Porcelain Tile Tool Tips
How to Cut an Outdoor Tile | Outdoor Tiling Guide | Outdoor Tiling How To
Step 4 - Check Compatibility
Confirm that your tile supplier and pedestal manufacturer are compatible. Some tile manufacturers void their warranty if their product is used with pedestals that don't appear on an approved list. If in doubt, ask both parties in writing.
Step 5 - Prepare the Substrate
The waterproofing membrane must be complete and tested before any pedestals are placed. Ensure drainage outlets are correctly positioned and clear. Sweep the membrane clean - grit beneath a pedestal base can act as a stress concentrator and puncture softer membranes over time.
A porcelain tile pedestal system is a durable, and surprisingly practical solution for outdoor living spaces. When correctly specified and installed, it delivers a finish that looks sharp, drains effectively, protects the waterproofing beneath, and can last for decades with minimal intervention. At Pro Tiler Tools, we supply a variety of high-quality pedestal systems from Schluter, Peygran and Mapei which suit your different needs. If you require any additional support regarding the tile pedestal systems, please get in touch with our friendly team via email [email protected] or give us a call at 01604 859800.