Artificial grass looks good on the surface, but what matters most is what lies beneath. The infill, base preparation, and drainage system determine whether your turf will last, drain properly, stay odor-free, and look natural underfoot. This guide walks you through each layer of a well-built artificial grass installation, from soil excavation through final power brooming, so you understand what separates a durable installation from a shortcut job. Whether you are installing turf in a residential yard, a pet area, or around a pool surround, the principles are the same.
Oceanside's sandy coastal soil, salt air, and mild climate create specific challenges for any lawn, real or artificial. This guide is written for homeowners in Oceanside and surrounding areas who want to understand what goes into a turf installation and what to expect from a professional installer.
Turf Infill Options: Silica, Coated Sand, Zeolite and Envirofill
Infill is the granular material that sits on top of the turf backing and fills the space between the synthetic fibres. It serves multiple purposes: it holds the fibres upright, protects the backing from ultraviolet light, adds weight to keep the turf in place, and plays a role in drainage and odor control. Different infill types are suited to different applications, and your choice depends on your yard's use and your priorities.
Silica sand is the most common and least expensive infill. It is simply angular or rounded sand, typically washed and graded by size. Silica sand ballasts the turf and does the job, but it is harder underfoot and does not offer any special odor control or cooling properties. Coated sand is silica sand with a polymer or mineral coating that softens the feel, reduces dust, and can be dyed to match your turf colour. Coated sand is gentler on bare feet and is often preferred in residential yards and play areas. Zeolite is a microporous mineral that absorbs and neutralizes ammonia and other odors, making it a popular choice for pet turf and dog runs. It does not eliminate odor on its own, but it reduces it significantly when combined with proper drainage and cleaning. Antimicrobial and cooling coated infills, such as Envirofill, are engineered to inhibit bacteria growth and reduce surface temperature in hot sun. These products cost more than basic silica but may be worth considering in high-use areas or where odor and heat are concerns.
Crumb rubber, made from recycled tires, is standard in sports fields and synthetic courts because it provides cushioning and is cost-effective at scale. It is rarely used in residential installations, and residential turf specifications typically call for sand-based infills. If you are considering a sports or gym application, discuss infill options with your installer.
How Much Infill Artificial Grass Needs, and Why
Infill is specified by weight, measured in pounds per square foot (psf). This number tells you how much infill will be spread across the turf to fill the fibres and create a stable, durable surface. A typical residential installation calls for 2 to 4 pounds per square foot, depending on the turf product, pile height, and intended use. Pet areas and play zones often use infill at the higher end of the range because they see more foot traffic and need extra cushioning and stability. Putting greens and sports surfaces may use different specifications altogether.
Infill amount is one of the easiest places for an installer to cut corners. Too little infill means the fibres do not stand up properly, the backing is exposed to UV damage, and the turf becomes matted and worn in high-traffic areas. It also compromises drainage and allows odor to linger in pet areas. A properly specified installation will include the infill weight in writing before the work begins, and a reputable installer will not shy away from this detail. Ask for the figure in pounds per square foot and have it included in your written specification. The amount depends on the exact turf product, so it should be determined during the site visit and confirmed in your estimate.
What to Put Under Artificial Grass for Drainage
The foundation under artificial grass is as important as the turf itself. The process begins with removal of the existing lawn, dead turf, or old sod, along with roots and organic matter that would decompose and create voids underneath. Once the surface is cleared, the area is excavated to a depth that allows room for a compacted base layer, typically 3 to 4 inches. The goal is to create a stable, well-draining platform that will not settle or develop low spots over time.
After excavation, a weed barrier (landscape fabric) is laid in most cases to prevent weeds from growing through from below. This is not always necessary, but it is standard practice and prevents long-term maintenance headaches. Next comes the base layer, usually 3 to 4 inches of decomposed granite, crushed limestone, or crushed base rock. This material is spread evenly and then compacted firmly using a plate compactor or hand tamper, working in thin lifts (layers) to achieve uniform density. Proper compaction is critical because an uncompacted base will settle unevenly, creating dips and soft spots where water pools and odors linger.
For patios, balconies, and hard surfaces, the process differs. Turf should never be glued flat onto a concrete slab or deck that cannot drain water. Instead, a draining underlay or cushion pad is laid first, allowing water to flow to the edges and away from the structure. For pet areas and play zones, an optional drainage pad or pet underlay is sometimes added on top of the compacted base to provide extra cushioning and improve drainage further. The turf is then laid and secured over this prepared base.
Base Prep on Oceanside Soil: Excavation, Base Rock and Compaction
Oceanside's soil is predominantly sandy and loose, especially near the coast, with pockets of clay and harder subsoil in older neighborhoods and the San Luis Rey valley. Sandy soil drains quickly, which sounds ideal but can actually cause problems if the base is not built correctly. Water runs through loose sand without spreading evenly, creating dry pockets and concentrated flow paths that erode the base and leave soft spots. In areas with clay or compacted subsoil, drainage is slower, and standing water becomes a problem if the base is not graded to slope away from structures.
Base preparation in Oceanside typically requires excavation to remove the top layer of poor soil, then installation of a 3 to 4 inch layer of decomposed granite or crushed base rock. The ground is graded to slope gently away from your house and any pool or patio, so water flows toward the yard's edges or drainage points rather than pooling. The base material is then compacted in lifts using a plate compactor, creating a firm, stable platform that will not shift or settle. This compaction step is what separates a professional installation from a rushed one. An uncompacted base will develop dips and soft spots within months, especially in sandy soil or under heavy foot traffic, and these depressions become traps for water and odor.
If your yard has a history of poor drainage, standing water, or a high water table, the base preparation is even more critical. In some cases, additional grading, subsurface drainage, or perforated drain lines may be necessary to solve the underlying problem. If drainage cannot be adequately addressed, the turf installation will fail. We assess drainage carefully during the site visit and will recommend solutions or decline the job if the water problem cannot be solved responsibly.
Artificial Grass Drainage and Underlay: Perforated vs Fully Permeable
Artificial grass is permeable, meaning water passes through it, but the rate of drainage depends on the turf backing and any underlay beneath it. Perforated backing has small holes punched through it to allow water to drain downward. Fully permeable backing allows water to flow through the entire backing material without holes, offering faster and more uniform drainage. Drainage rate is measured in gallons per hour per square foot (GPH/SF). A typical residential turf might drain at 20 to 40 GPH/SF, while pet and play-area turfs often drain faster to handle urine and heavy use.
However, fast-draining turf still fails on a base that does not drain. If water cannot move through the base layer and away from the site, it will pool on top of the turf or sit in the base, causing odor, soft spots, and premature wear. This is why base preparation and grading are non-negotiable. The turf and base must work together. For pet applications, drainage is especially important because urine needs to flow through the system quickly to prevent odor buildup. For patios, balconies, and hard surfaces, a drainage underlay or cushion pad is installed beneath the turf to create a gap for water to escape. On concrete or composite decking, edge drainage channels or perimeter gutters may be added to direct water away from the structure.
When evaluating a turf product or installation plan, ask for the drainage rate in writing and confirm that the base has been prepared to slope away from structures. If your installer cannot answer this question or dismisses it, that is a red flag.
Seams, Nails, Edging and Power Brooming
The finishing details of a turf installation reveal whether the work was done carefully or rushed. Seams are the joints where two pieces of turf meet. A proper seam is created by overlapping the turf pieces slightly, aligning the grain so the fibres run in the same direction on both sides of the seam, then joining them with seam tape and flexible adhesive applied to the backing. When done correctly, the seam is nearly invisible and very strong. A visible seam, a gap, or a seam that lifts at the edges tells you the grain was not matched or the adhesive was not applied properly. In full sun, a seam can also fail if the adhesive was not heat-resistant or if the turf was not allowed to acclimate to the site temperature before seaming.
Edging and perimeter work keeps the turf from fraying and rolling up at the edges. Turf is secured with galvanized nails or staples spaced 6 to 12 inches apart around the perimeter, and the edge is finished with bender board, landscape edging, or a secured perimeter that keeps the turf in place. Turf laid against pavers, pool decks, or concrete is cut tight to the hard edge so water drains away and the turf does not curl or trip. Power brooming is the final step: the entire surface is swept with a power broom to stand the fibres upright, spread the infill evenly, and remove footprints and wrinkles from installation. A turf that has not been power broomed will look matted and uneven.
These finishing details take time and skill. When you visit a completed installation, look at the seams, check that the edges are tight and secure, and feel the turf to confirm the fibres stand up evenly. If seams are visible, edges are loose, or the surface feels flat and matted, the installer cut corners on finishing work.
What a Written Turf Spec Should Include
Before any turf is ordered or installation begins, you should receive a written specification that details every material and method that will be used. This document protects you and ensures there are no surprises. A complete spec includes the following elements:
- Turf product and fibre type: the brand or product name, fibre material (polyethylene, polypropylene, or nylon), and colour.
- Face weight: measured in ounces per square yard, this indicates the density of the fibres. Higher face weight generally means better durability and appearance.
- Pile height: the length of the fibres, typically 1.5 to 2.5 inches for residential turf.
- Backing type and drainage rate: whether the backing is perforated or fully permeable, and the drainage rate in gallons per hour per square foot.
- Infill type and amount: the specific infill material (silica sand, coated sand, zeolite, etc.) and the weight in pounds per square foot.
- Base depth, material, and compaction method: typically 3 to 4 inches of decomposed granite or crushed base rock, compacted in lifts with a plate compactor.
- Weed barrier: whether landscape fabric will be used.
- Seam method: seam tape and adhesive, with grain alignment specified.
- Edging and perimeter finish: type of edging material and fastening method.
- Cleanup and haul-off: removal of old turf and debris from the site.
- Workmanship warranty: the period during which the installer guarantees the work, typically one to three years.
A written spec is your assurance that the installer knows the job, has thought through every detail, and stands behind the work. If an installer cannot or will not provide a written spec, move on. For a free on-site estimate and a detailed specification for your yard, contact us. See our pricing page for typical ranges and what to expect.