How to Install a Raised Access Flooring System

If you're planning a refurbishment, fitting out an office, or setting up a data center, a raised access flooring system can be the perfect solution for managing cables, airflow, and future flexibility. Done right, it’s a fast and cost-effective upgrade — but getting the installation process right is key to performance and durability. Here’s a full step-by-step guide.

What Is Raised Access Flooring?

Raised access flooring is a type of modular floor structure that sits above the building’s original floor slab. It uses adjustable pedestals and panels to create a void for cables, electrical systems, and HVAC equipment — keeping everything hidden but easily accessible.

• Office spaces
• Server rooms
• Retail fit-outs
• Control rooms

Step 1: Preparation

Before any materials arrive, start with a clean, flat, and dry subfloor.

• Sweep and clean the subfloor thoroughly
• Mark out any zones, walls, or fixed items
• Confirm final floor heights (including panel + pedestal + adhesive thickness)
• Check for moisture issues — access flooring needs dry conditions

Tip: A good laser level will make your life much easier when setting heights!

Step 2: Setting Out the Grid

Using your floor plan, mark the starting points:

• Find the center point or key axis of the room
• Snap chalk lines or laser lines across the room to create a master grid
• Set pedestals where the panels will intersect (typically 600mm x 600mm)

Step 3: Fixing the Pedestals

Most raised floor pedestals are glued with a two-part adhesive, while others may use mechanical fixings.

• Mix adhesive as per manufacturer’s instructions
• Apply to the base of each pedestal
• Press firmly into position along your grid lines
• Allow the adhesive to cure fully (this is critical for stability!)
• Adjust the pedestal heads to the correct height using a spirit level or laser level

Step 4: Installing the Stringers (if required)

Some systems use additional stringers — metal bars between pedestals — for extra rigidity, especially in heavy-load areas.

• Clip, bolt or screw the stringers to the pedestal heads
• Check for squareness regularly as you go

Step 5: Laying the Access Floor Panels

Once the pedestal system is stable:

• Start placing floor panels carefully into the grid
• Ensure each panel sits securely on the pedestal head gasket or fixing plate
• If required, screw down the panels
• Stagger cuts and panels where needed for strength
• Adjust heights if needed to eliminate rocking panels

Step 6: Trimming and Finishing

At the edges of the room:

• Cut panels neatly using a circular saw (wear dust protection)
• Leave expansion gaps against perimeter walls
• Install skirting trims or edge details as required

Common Mistakes to Avoid

• Rushing the pedestal setting out — leads to poor alignment later
• Skipping curing time on adhesives
• Not checking the level constantly across the floor
• Cutting panels without dust control

Why Proper Installation Matters

A poorly installed access floor will develop squeaks, movement, uneven gaps, and costly rework later. A proper install guarantees:

• A safe, professional appearance
• Smooth cable management
• Easier future maintenance
• Longer lifespan

Conclusion

Installing a raised access floor isn’t difficult with good preparation, careful layout, and attention to detail. By following the right steps, you'll create a solid, level platform ready for whatever your project needs — from high-spec offices to high-load data centers.