Artificial grass installed in Killeen sits on a foundation that determines whether it drains well, stays level, resists odor and lasts. This guide walks through infill choices, base preparation on Killeen's limestone and clay soils, drainage design, and the finishing details that separate a professional installation from a shortcut job. Whether you are converting a lawn that has died in drought, building a dog run, preparing a patio or pool surround, or replacing turf that has failed, understanding what goes under and inside the grass helps you ask the right questions and recognize quality work.
The guide is written for homeowners in Killeen and the surrounding areas who want to know how artificial turf is built to work in our heat, sudden storms, and the clay-over-limestone terrain between the Hill Country and the Blackland Prairie. It covers the choices you have, the trade-offs between them, and what to insist on in writing before installation begins.
Turf Infill Options: Silica, Coated Sand, Zeolite and Envirofill
Infill is the granular material spread across the turf after installation. It sits between and on top of the synthetic fibres, holding them upright, protecting the backing from ultraviolet light, adding weight to keep the turf from shifting, and helping water drain through. The most common infill is silica sand, a basic mineral ballast that is inexpensive and widely available. Silica does the job, but it is angular, can compact over time, and in Killeen's heat it can become hot to the touch. Coated sand is silica that has been rounded and often coloured or treated to soften its edges and improve drainage. Coated sand costs more than raw silica but performs better underfoot and resists compaction longer.
Zeolite is a microporous mineral that absorbs and neutralizes odors, making it popular in pet turf and dog run installations. It does not eliminate odor on its own but works best as part of a complete drainage system and regular cleaning routine. Antimicrobial and cooling coated infills, sold under brand names such as Envirofill, are silica or sand coated with additives designed to inhibit bacterial growth and reduce surface heat. These products cost more but are worth considering in high-traffic pet areas or where heat is a concern. Crumb rubber, made from recycled tires, is standard for sports fields and synthetic athletic courts where impact absorption matters, but it is not recommended for residential yards or pet areas because it retains heat, can stain light-colored clothing, and raises questions about long-term exposure that are best avoided in a home setting.
How Much Infill Artificial Grass Needs, and Why
Infill is specified in pounds per square foot, a measurement that tells you how much material is actually in the turf. The amount matters because too little infill is one of the most common shortcuts in cheap installations. Insufficient infill leaves the fibres floppy and unsupported, exposes the backing to sun damage, reduces the weight that keeps the turf in place, and allows drainage to slow. Typical residential turf is specified between 1.5 and 3 pounds per square foot, depending on the pile height, fibre type, and intended use. Pet turf and high-traffic areas often call for the higher end of that range. Play and sports surfaces have their own specifications, sometimes running higher. The exact amount depends on the product you choose, and that is why it must be stated in writing before work begins.
When you ask an installer for a quote, insist that they include the infill weight in pounds per square foot in their written specification. Do not accept vague language such as "properly filled" or "industry standard." A professional installer measures your yard on site, calculates the square footage accurately, and tells you the product name, the pile height, the face weight of the fibre, the infill type, and the infill weight in writing. This specificity is how you know the job is being priced fairly and built to last. If an installer resists putting these numbers on paper, that is a signal to get another bid.
What to Put Under Artificial Grass for Drainage
Artificial grass must sit on a foundation that allows water to pass through and does not hold moisture against the backing. The process starts with removal of the existing lawn, dead sod, or old turf and all roots and debris. Once the area is cleared, the ground is excavated to the depth needed for a stable base, typically three to four inches. On top of bare soil, a weed barrier fabric is laid to prevent weeds from growing up through the turf. The barrier is permeable, allowing water to drain through while blocking root growth. Over the weed barrier, a free-draining base material such as decomposed granite or crushed base rock is spread and compacted firmly in layers. This base is the skeleton of the installation and must be done right.
For patios, balconies, and hard surfaces, the approach is different. Turf cannot be glued flat to concrete or pavers that hold water, because moisture will be trapped against the backing and cause odor, mold, and premature failure. Instead, a draining underlay or pad is laid over the hard surface, creating a gap that allows air and water to flow beneath the turf. Edges must be managed so water does not pool at the perimeter. For pet areas, a drainage pad under the turf adds comfort and helps with odor control. For pool surrounds, the pad protects the backing and allows drainage away from the pool structure. The order of layers is always the same: prepare the ground, lay the barrier or pad, compact the base, then install the turf on top.
Base Prep on Killeen Soil: Excavation, Base Rock and Compaction
Killeen sits on rolling limestone hills with thin rocky soil and pockets of sticky dark clay that overlies limestone ledges. This soil composition creates both opportunities and challenges for turf installation. Where the soil is sandy or already drains well, base prep is straightforward. Where clay is present or the ground is compacted, excavation and grading are essential. A base that is not properly prepared will settle unevenly, creating dips and soft spots where water pools, odor builds, and the turf wears prematurely. Compaction is the key to preventing these problems.
Base preparation begins with excavating to remove poor soil and create a level or slightly sloped foundation. The slope should fall away from the house and away from any pool or structure to direct water toward drainage. Decomposed granite or crushed base rock, typically three to four inches deep, is spread over the prepared ground and compacted firmly using a plate compactor in multiple passes. This compaction binds the material together and creates a stable, level surface that will not shift under foot traffic or rain. On yards with real drainage problems, standing water, or clay that stays wet, the issue must be addressed before turf is installed. If the site cannot drain adequately even with a proper base, the installation is declined in favor of fixing the drainage first. Turf can mask a water problem for a time, but it will not solve it, and a wet base leads to failure.
Artificial Grass Drainage and Underlay: Perforated vs Fully Permeable
Artificial grass is permeable by design, but how fast water passes through depends on the backing. Most residential turf has either perforated backing, which includes small holes punched through the material, or fully permeable backing, which is open-weave and allows water to flow freely. Drainage rate is measured in gallons per hour per square foot. A fast-draining turf might allow 60 or more gallons per hour per square foot, while a slower product might drain 15 to 30. For typical residential yards, a moderate drainage rate is adequate. For pet areas where urine is a daily concern, or for yards in areas prone to heavy downpours, a faster-draining product is worth the investment.
However, fast-draining turf installed on a base that does not drain is like putting a strainer on top of a bucket with a hole in the bottom. The water has nowhere to go. This is why base preparation and compaction are not optional. An underlay or drainage pad beneath the turf can improve performance on hard surfaces such as concrete, pavers, or balconies, and can add comfort in pet areas. The pad allows water to flow laterally beneath the turf toward the edges and away from the structure. No product specification should be accepted without knowing the drainage rate in writing. When you ask an installer about drainage, ask them to tell you the rate in gallons per hour per square foot and to explain how water will leave your yard. A vague answer is a red flag.
Seams, Nails, Edging and Power Brooming
The finishing details of a turf installation reveal whether the work was done by a professional or a crew cutting corners. Seams, where two pieces of turf meet, must be joined with seam tape and seam adhesive, with the pile grain aligned so the seam is nearly invisible. Poor seam work shows as a visible line, a ridge, or a gap where water can enter. Nails or staples hold the turf at the perimeter and along seams, spaced at the correct intervals (typically 6 to 12 inches) to keep the turf from shifting without over-fastening and tearing the backing. Edging is secured with bender board, metal or plastic edging, or a landscape border that holds the turf perimeter down and creates a clean line. Turf cut tight to pavers, cool decks, or pool coping prevents tripping and keeps water from pooling at the edge.
After installation, the turf is power broomed, a process that stands the synthetic fibres upright and spreads the infill evenly across the surface. This finishing step is what makes new turf look full and uniform. A seam that is visible or lifting, an edge that is loose or curling, or turf that lies flat without the texture of properly spread infill are all signs that the work was rushed or incomplete. When you inspect a finished installation, run your hand across the seams, press on the edges, and look for consistency in pile height and infill distribution. These details cost nothing extra but separate a quality job from one that was done to a price.
What a Written Turf Spec Should Include
Before any work begins, you should receive a written specification that covers every material going into the ground and every step of the installation. The spec should name the turf product and fibre type (for example, polyethylene or nylon), the face weight in ounces per square yard, the pile height in millimeters, the backing type and its drainage rate in gallons per hour per square foot, the infill type and weight in pounds per square foot, the base material and depth, the compaction method, whether a weed barrier is included, the seam method and edging material, cleanup and haul-off, and the workmanship warranty period. This written spec is your protection and the installer's commitment. It prevents misunderstandings and gives you a standard against which to measure the finished work.
A professional installer will measure your yard on site, provide a detailed written estimate, and answer your questions about each line item. You should understand what is going in, why it is going in, and what the cost covers. Do not accept a price per square foot without a site visit. Do not accept vague language such as "premium turf" or "complete installation." Ask for the spec in writing before you sign anything. If you are ready to move forward, call us at (254) 277-1537 for a free estimate and a detailed specification. For more information on pricing, visit our pricing page.