Artificial grass in Scottsdale lives or fails below the surface. The turf fibre, infill, base preparation, and drainage system work as a single assembly, and a shortcut in any one layer shows up as puddles after a monsoon, lifted seams, odor that won't fade, or bare spots worn through to the backing in two seasons. This guide walks through each layer: what infill does, how much of it you need, what goes under the turf, how to prepare Scottsdale's hard caliche soil, and how drainage works in practice. Whether you are installing turf in a residential yard, a pet area, around a pool, or on a commercial property, the fundamentals are the same.
A homeowner who understands these layers can ask the right questions of any turf installer, read a written specification with confidence, and spot the difference between a crew that cuts corners and one that does the work properly. This is not a sales pitch. It is what you need to know before you call, and what you should see in writing before the work begins.
Turf Infill Options: Silica, Coated Sand, Zeolite and Envirofill
Infill is the material spread across the turf surface after installation. It serves multiple purposes: it props up the grass fibres so they stand upright and feel natural underfoot, it protects the turf backing from ultraviolet light, it adds weight to hold the turf in place during wind and use, and it plays a critical role in drainage and odor management. The type of infill you choose depends on the application, the turf product, and the specific challenges of your yard.
Silica sand is the foundation infill for most residential turf. It is inexpensive, readily available, and does the job of ballasting and protecting the backing. Silica sand is angular and relatively coarse, which means it settles over time and requires occasional raking to redistribute it evenly. Coated sand is silica sand treated with a polymer or mineral coating that rounds the grains and often adds colour. Coated sand is gentler on the skin and more pleasant to walk on barefoot, it resists compaction better than raw silica, and it is the standard choice for residential yards, patios, and pool surrounds where comfort matters. Zeolite is a microporous mineral that absorbs moisture and odor-causing compounds. It is often blended with silica or coated sand in pet turf applications, where it helps manage urine odor by trapping ammonia and moisture before they break down into foul-smelling gases.
Antimicrobial and cooling coated infills represent the next tier of performance. These are coated sand products infused with minerals or treatments designed to reduce bacterial growth and lower the surface temperature of the turf in direct sun. Envirofill is one example of a cooling and antimicrobial coated infill sold by manufacturers. These products cost more than standard coated sand, but in Scottsdale's heat and pet-heavy yards, they can make a real difference in comfort and odor control. Crumb rubber (recycled tire rubber) is used primarily in sports fields, courts, and playgrounds where impact absorption is the priority. It is not recommended for residential yards or pet areas because it retains heat in the Arizona sun, can smell when hot, and is difficult to clean.
How Much Infill Artificial Grass Needs, and Why
Infill is specified in pounds per square foot (psf), and this number matters. A typical residential turf product requires between 1.5 and 3 pounds of infill per square foot, depending on the fibre type, pile height, and intended use. Pet turf and play-area turf often call for the higher end of that range, sometimes 3 to 4 psf, because the extra infill cushions impacts and helps manage drainage and odor. Putting greens and sports surfaces may require even more, tailored to the specific product and performance standard.
Infill does four critical jobs. It holds the fibres upright so the turf looks full and feels natural, rather than matted and sparse. It shields the turf backing from UV degradation, which extends the life of the installation. It adds weight so wind and foot traffic do not shift the turf or open up seams. And it allows moisture and drainage to flow through the turf pile to the base below. Too little infill is a common shortcut taken by installers working on thin budgets. A yard that receives only 1 pound per square foot when it should have 2.5 will look thin within a year, the backing will degrade faster, and drainage will suffer because water will sit on the surface instead of filtering down.
When you receive a quote or a written specification, ask for the infill amount in pounds per square foot and get it in writing. Do not accept a vague answer like "we use industry-standard infill." The exact figure, the infill type (silica, coated sand, zeolite blend, or premium cooling product), and the pounds per square foot should appear on your contract or estimate.
What to Put Under Artificial Grass for Drainage
The path to good drainage starts before the turf goes down. The first step is removal: the existing lawn, old turf, roots, and debris must be cleared away. If you have a dead bermuda lawn or an old synthetic turf installation, those materials are excavated and hauled off. Roots left in place will decompose, creating voids that cause settling and dips. Once the site is cleared, the ground is graded and excavated to the depth required by the base specification, typically three to four inches below the finished turf height.
After excavation comes base preparation. In Scottsdale, the native soil is hard desert caliche and compacted earth that drains poorly, so it must be broken up and replaced with a free-draining material. Decomposed granite (DG) or crushed base rock is spread in lifts (usually two-inch layers) and compacted firmly with a plate compactor. Each lift is compacted before the next is added. This creates a stable, well-draining base that will not settle or develop soft spots. A weed barrier (landscape fabric) is sometimes laid over the compacted base to prevent weeds from growing up through the turf, especially in yards with a history of persistent weeds.
For patios, balconies, and hard surfaces, or for pet areas where cushioning and drainage matter, a draining underlay or foam pad is installed over the base before the turf. This pad adds comfort, helps manage moisture, and can reduce odor by improving air circulation. On concrete or existing pavers, turf is never glued flat to the slab without a draining layer underneath, because water will pool on the concrete and foul the backing. The turf goes down last, after all base and underlay work is complete and the surface is clean and level.
Base Prep on Scottsdale Caliche: Excavation, Base Rock and Compaction
Scottsdale sits on the Sonoran Desert floor, and the soil reflects it. Below the surface layer lies caliche, a hard, calcium-carbonate-cemented layer that sheds water rather than absorbing it. Native soil is compacted, dense, and has poor drainage. When you lay turf on unmodified native soil or caliche, water pools after a monsoon storm, the base stays wet, odor develops in pet areas, and the turf backing begins to break down. The solution is excavation and replacement with a proper base.
The base preparation process begins with excavation to remove the top layer of native soil and caliche. The depth depends on the turf product and the yard's existing drainage, but typically three to four inches of new base material is installed. The yard is graded so that water runs away from the house and away from any pool or hardscape. This fall (a slope of roughly 1 to 2 percent) is critical in monsoon season; without it, water collects in low spots and the turf sits in moisture. Decomposed granite or crushed base rock is then spread in two-inch lifts and compacted firmly with a plate compactor. Each lift must be compacted before the next is added. A compacted base is dense enough to support foot traffic and turf weight without settling, but still open enough to allow water to drain through it to the subgrade below.
An uncompacted base is one of the most common failures in low-cost turf work. Without compaction, the base settles unevenly over the first season, creating dips and soft spots where water pools. Those puddles do not drain, the turf sits in moisture, odor builds in pet areas, and the backing degrades. In Scottsdale's heat and monsoon rains, a compacted base is not optional. If your yard has a chronic drainage problem, water pooling, or standing moisture after storms, that issue must be solved before the turf goes down, or the installation will fail. In cases where the drainage problem is severe or cannot be resolved with grading and base work alone, we decline the job rather than promise a result we cannot deliver.
Artificial Grass Drainage and Underlay: Perforated vs Fully Permeable
Artificial grass drains by design, but only if the entire system works together. The turf backing itself is either perforated (punched with small holes) or fully permeable (woven or knitted so that water passes through the fibre structure). Perforated backing is standard for most residential turf; it is less expensive and adequate for typical rainfall and irrigation runoff. Fully permeable backing allows water to flow through more freely and is often used in pet turf, play areas, and sports surfaces where drainage speed matters. The drainage rate of the turf is measured in gallons per hour per square foot (GPH/SF). A typical residential turf drains at 30 to 60 GPH/SF, which means it can handle normal rain and irrigation without pooling. Pet turf and play-area turf often drain faster, at 60 GPH/SF or higher.
However, fast-draining turf fails catastrophically on a base that does not drain. If the base is uncompacted, poorly graded, or laid over native caliche, water pools on top of the backing even though the turf itself is permeable. In a monsoon downpour, which can drop an inch or more in minutes, the base cannot absorb or shed the water fast enough, and the turf becomes a soggy mat. This is where the base preparation and grading described above become critical. The base must be compacted, graded away from the house, and made of free-draining material. Only then will the turf's drainage performance matter.
For hard surfaces like concrete, pavers, or balconies, an underlay or draining pad is essential. This layer sits between the concrete and the turf, allows water to flow through it, and keeps the turf from sitting in standing water. Edge drainage (a perimeter channel or slope) ensures that water runs off the edges and does not pool at the perimeter. On a balcony or rooftop, proper slope and edge detail prevent water from backing up and damaging the structure below. Ask your installer for the drainage rate of the turf in writing, and ask how the base and underlay will handle Scottsdale's monsoon storms.
Seams, Nails, Edging and Power Brooming
The finishing details of a turf installation reveal whether the work was done by a crew that cares or one that is rushing to the next job. Seams, the joints where two pieces of turf meet, are a common failure point. A proper seam is joined with seam tape (a strip of adhesive-backed fabric) and turf seam adhesive applied to both edges. The grain of the turf (the direction the fibres lean) is aligned across the seam so the joint is invisible and the fibres stand uniformly. The adhesive is allowed to cure fully before the turf is walked on. A visible seam, a seam that gaps open when the turf is pulled, or a seam where the fibres stand in different directions tells you the work was not done carefully.
Nails or staples secure the turf to the base and hold the edges down. They are spaced at regular intervals (typically 6 to 12 inches apart, depending on the product and conditions) around the perimeter and along any seams. Spacing that is too wide allows the turf to shift and edges to lift. Spacing that is too tight can damage the backing. Edging is the perimeter detail that finishes the yard. Bender board (a flexible metal or plastic strip) is nailed along the edge to create a clean line and hold the turf in place. On a patio or pool surround, the turf is cut tight to the pavers so no backing shows and water drains cleanly off the edge. On a slope or a yard with a view fence, the edging is secured so wind and foot traffic do not pull it away from the base.
Power brooming is the final step. A power broom (a mechanical brush) is run over the turf surface to stand the fibres upright, spread the infill evenly, and give the turf a full, finished appearance. Without power brooming, the turf looks thin and matted, and the infill is unevenly distributed. A well-finished installation shows clean, tight seams, secure edges, firm turf that stands upright, and infill spread evenly across the surface. These details take time and skill, and they are what separate a professional installation from a quick-and-cheap job.
What a Written Turf Spec Should Include
Before any work begins, you should receive a written specification that details every material and method that will be used. This spec is your contract and your protection. It should include the turf product name and fibre type (polyethylene or nylon), the face weight (in ounces per square yard), the pile height (in millimeters), the backing type (perforated or fully permeable), and the drainage rate (in gallons per hour per square foot). It should name the infill type (silica sand, coated sand, zeolite blend, or cooling product) and specify the amount in pounds per square foot. It should state the base material (decomposed granite or crushed rock), the base depth (typically three to four inches), and the compaction method. It should note whether a weed barrier will be installed and specify the seam method (tape and adhesive), edging material, and whether power brooming is included. Cleanup and haul-off of old turf and debris should be listed. And the spec should state the workmanship warranty period (typically one to three years on the installation only).
A vague estimate that says "we will install turf" without these details is not a spec. Neither is a price per square foot without the product information. You are not being difficult by asking for this level of detail. Every professional turf installer should be willing to provide it, and should expect you to ask. The written spec protects both you and the installer by setting clear expectations about what will be done and what materials will be used. When you are ready to move forward, request a free on-site estimate and ask for a detailed written specification before you sign. For pricing information and typical ranges for Scottsdale projects, see our pricing guide. A homeowner who knows the spec will know whether the work was done right.