How to Lay Artificial Grass: Materials and Steps

Measure the area that will actually receive artificial grass, not the surrounding paving or garden beds. Sketch the outline, note fixed edges, drains, trees and narrow passages, and divide an irregular shape into non-overlapping rectangles. Record each length and width in metres. The calculator handles rectangles, compares the locally sourced roll widths and shows the estimated seams, tape, infill and pins. Its estimate is a take-off, not a cutting diagram for every roll supplier.

Choose the pile direction from the main viewing point before you decide where seams will fall. Synthetic grass pieces can look like different colours when their fibres face different directions. The supplier guides cited for Australia recommend keeping the pile direction consistent. Ask the retailer whether the roll can be cut to your required lengths and whether its maximum roll length or delivery format changes the layout.

Measure edging height and decide where the finished turf should sit. That determines how much existing surface must be excavated and how much room remains for the base and grass backing. Check drainage paths and door thresholds before digging. If the site already has concrete or pavers, ask whether the selected product can be installed on that surface and how water will drain.

Australian supplier installation guides commonly describe a compacted crushed-rock base with a finer finishing layer, but their depths differ. Australian Paving Centre gives an example of excavating 75 to 100 mm, using about 50 to 70 mm of fine crushed rock, then a 10 to 20 mm crusher-dust layer. Synturf describes 75 mm crushed rock followed by 15 mm crushed dust. These are supplier methods, not a universal Australian specification.

Remove vegetation, roots, loose soil and debris, then shape the subgrade so water can drain away from buildings and low areas. Compact the ground and add the base in layers according to the product guide. Rework soft patches rather than hiding them under the finish. The calculator does not measure excavation, estimate base aggregate or soil removal, or decide whether the site requires a drainage design.

Check the compacted level against the surrounding edge so the backing and pile finish where planned. The APC guide specifies a drainage fall example and a gap below surrounding paving; the exact fall and finished level depend on the property and the installation system. Do not direct runoff onto a neighbour’s land or toward a building. Ask a landscaper if the site is flat, retains water or has complex levels.

For each rectangular area, compare the calculator’s roll-width layouts and check both the grass area and seam count. A layout with less total area can still be harder to install if it creates awkward joins. The calculator can reuse compatible strip cuts in its area estimate, but it does not account for every roll-length limit, obstacle, curve, colour batch or cutting offcut. Confirm final dimensions with the supplier before paying for custom cuts.

The Australian grass data includes roll widths of 3.71 m, 3.75 m and 4 m from the referenced suppliers. Those are examples of available products, not a national standard. Its installation data also uses supplier guidance for sand infill and pin spacing. The product you buy may require another infill, adhesive, edge restraint or spacing. Use the exact instructions for the grass, seam tape and fixing system.

Seam tape is estimated from seam length, while pins are estimated from listed perimeters and seams at the chosen interval. Rectangles that share an edge may be treated as separate exposed perimeters, so inspect the output against your sketch. Pins are not necessarily the right fixing for every substrate. Concrete edges, timber edging, retaining edges and high-wind exposures may need a specified adhesive or mechanical fixing.

Let a roll relax as its manufacturer recommends, then dry-fit all pieces before trimming. Align the pile direction, trim factory edges where instructed and cut from the backing side to reduce the chance of cutting fibres. Use a sharp blade with care, and make small cuts while checking the fit. Do not stretch pieces under tension to close a gap; that can pull seams or edges out of position later.

Bring seam edges together without overlapping them, and keep fibres clear of adhesive. Centre the specified joining tape under the joint and follow its application instructions. The APC guide describes spacing pins around the edges and near joins, but those values apply to that guide’s example only. Follow the method for your chosen grass and base, including how the perimeter is restrained.

Spread infill evenly only if the product calls for it. The APC guide describes kiln-dried silica sand at 5 to 8 kg/m², brushed into the pile; the tool uses that sourced range as a starting example. A grass product can specify a different rate or no infill. Brush in the direction stated by the maker and keep sand away from drains. Inspect the surface for trapped fibres, raised edges and open seams before use.

The most avoidable problems are ordering before confirming pile direction, leaving a soft base, using inconsistent cut lengths, trapping fibres in a seam and assuming every artificial lawn uses the same sand or fixing method. Take photographs and keep the dimensions, supplier product name and installation guide with the order. Check whether the selected grass is suitable for pets, play, sunlight and the expected foot traffic rather than relying on appearance alone.

This calculator estimates grass, seams, infill and pins from the dimensions and settings entered. It does not estimate crushed rock, crusher dust, excavation spoil, edging, drainage, adhesive, labour or tools. It also does not approve a base, warranty installation quality or prescribe an infill rate. Ask the supplier or a qualified landscaper about drainage, retaining edges, slopes or existing hard surfaces.

Before work, locate underground services and follow safe excavation and equipment instructions. Compaction plates, cutting tools, heavy rolls and bags need careful handling. Keep people away from active work, use suitable protective equipment, and arrange professional help where the site or access is beyond your experience. Check the current product documents because supplier methods and product availability can change.

Before ordering, confirm the final lawn measurements, pile direction, roll length, edge detail and selected infill with the supplier. Keep the product name and installation guide with the take-off so a substitute roll or fixing system is not assumed to have the same dimensions or instructions.

Check service locations before excavation and protect people from cutting, lifting and compaction equipment. Where levels, drainage or retaining edges are uncertain, get site-specific advice. The calculator estimates selected surface materials; it does not verify subgrade preparation or the finished lawn design.