UV exposure fades turf over time and heavy traffic compacts the infill, flattening the fibres - and these are two separate failures that get priced separately. Fading is a sun problem, decided largely by the fibre's face weight and UV stabilisers. Flattening is a traffic and maintenance problem, decided by how much infill was installed and whether it has been topped up and brushed. Both look like an old lawn, and homeowners regularly pay for a replacement when an infill top-up and a brush would have restored the yard. Infill top-ups and proper brushing extend the turf's life, so the useful question is which of the two you are looking at. Here is what each one looks like, why it happens, what a licensed pro checks, how to prevent it, and what it costs to put right.
What fading and compaction look like
- Washed-out or greyish patches next to deeper green ones. Fading is uneven because the sun is uneven, so the colours expose which parts of the yard get the most direct sun.
- A silvery or shiny sheen in low sun. Fibres that have lost their pigment and their fine texture catch the light differently, which is the stage before they start to break down.
- Flattened, matted traffic lanes. A path from the gate to the door, a dog's run line, or the ground in front of the seating that has gone flat and shiny while the rest still stands up.
- Blades that no longer spring back. Brush them with your hand; turf with enough infill and healthy fibres springs upright, and turf without stays down.
- Infill that has settled below the base of the blades. If you can see and feel mostly backing between the blades rather than sand, the infill has compacted or washed down and is no longer doing its two jobs - holding the blades up and shielding the backing from UV.
- Wrinkles and creeping seams that go with the flat spots. Surface that is not held down tight will crawl through the day-to-night temperature swing, and that movement shows up first where the traffic is heaviest.
Why it happens here
- UV exposure degrades pigment, then fibre. Every season of intense sun bleaches the colour, and without adequate UV stabilisers the fibre itself embrittles. On the published UV Index scale, values of 8 and above are very high to extreme, and the guidance at that level is that extra protection is warranted even outside peak hours.
- Face weight and pile height decide how it wears. Higher face weight and denser backing generally mean a fuller look and a longer life, which is why cheap turf looks flat fast. Face weight in ounces per square yard, pile height, backing layers and UV stabilisers are the specs that predict the outcome.
- Too little infill, or the wrong kind. Infill provides the ballast that keeps the turf flat, protects the backing from UV, and supports the fibres so they stand upright. Skip or skimp on it and the proof shows up in flattened, shiny traffic lanes within a season or two, and the backing takes the sun directly.
- No brushing. Fibres lie over with use and stay over until something stands them up. Raking or brushing against the pile is the single most effective maintenance task, and it is the one most homeowners never do.
- Traffic that always follows the same line. A dog running a fence line or a family taking the same route to the door compresses the same strip of infill day after day. The infill does not recover on its own.
- A base that is not stable underneath. The published failure list pairs wrinkles and seam movement with a weak or shallow base, because a surface that is not held down tight crawls through the temperature swings - and Boise swings from a July afternoon in the nineties down to the forties at night, and through repeated freeze-thaw cycles from November to March.
- What the sun and the ground add. Boise is a cold-winter, hot-dry-summer valley market, and the case for artificial turf here inverts the desert-water argument used in the Southwest. The NOAA/NCEI 1991-2020 monthly normals for Boise Air Terminal (USW00024131, the station USDA uses for this valley) put January normal average at 32.2 F with a normal daily minimum of 25.5 F and a normal daily maximum of 38.8 F, July normal average at 77.3 F with a normal daily maximum of 92.7 F, annual precipitation at 11.51 inches, and the annual snowfall normal at 17.6 inches (https://www.ncei.noaa.gov/data/normals-monthly/1991-2020/access/USW00024131.csv, HTTP 200). The 2023 USDA Plant Hardiness Zone Map places Boise in zone 7a, i.e. an average annual extreme minimum of 0 to 5 F (map at https://planthardiness.ars.usda.gov/, HTTP 200; ZIP 83702 lookup returns 7a, https://phzmapi.org/83702.json, HTTP 200). Computed from the NOAA ACIS daily record for the same station over 1991-2025 (https://data.rcc-acis.org/StnData, HTTP 200), the median last spring freeze at or below 32 F falls on about May 1, the median first fall freeze on about October 18 - a frost-free window of roughly 170 days - and the station averages about 108 days a year with a minimum at or below 32 F. City of Boise design criteria state Boise's frost depth is 24 inches minimum below grade (https://www.cityofboise.org/departments/planning-and-development-services/building/homeowners-guide/, HTTP 200). Two consequences drive the whole market: for roughly a third of the year the lawn is dormant, muddy and physically unwalkable (a dog-run and back-door problem long before it is a water problem), and the ground itself moves through the freeze-thaw cycle on a scale of a hundred-plus freezing nights. Summer is the opposite - hot, dry and windy enough that keeping a real lawn green is a six-month irrigation project: Veolia's regional president puts service-area demand at 'above 90 million gallons a day' in summer against '25 million gallons during winter' (https://www.cityofboise.org/news/public-works/2026/july/city-of-boise-adopts-drought-ordinance, HTTP 200). The Treasure Valley floor is not the caliche of the Southwest but it hardpans just as decisively, and at worse depths. USDA-NRCS Soil Data Access samples across the seven towns return loess-and-volcanic-ash-derived Argidurids and Calciargids with silica-lime duripans, plus thick calcic horizons. Purdam, the mapping at the Meridian town centre, is a fine-silty, mixed, superactive, mesic Haploxeralfic Argidurids whose typical pedon carries a strongly cemented duripan from 24 to 38 inches, with depth to duripan ranging 20 to 40 inches and depth to calcium carbonate 12 to 28 inches (https://soilseries.sc.egov.usda.gov/OSD_Docs/P/PURDAM.html, HTTP 200); Purdam's type location is Canyon County about 4 miles southwest of Caldwell. Elijah, mapped across south Boise, is a fine-silty Xeric Argidurids with a continuous, very strongly cemented platy duripan in the typical pedon and a range of 20 to 40 inches to the pan (https://soilseries.sc.egov.usda.gov/OSD_Docs/E/ELIJAH.html, HTTP 200). Colthorp, the mapping at Kuna, is a loamy, shallow Xeric Argidurids with an indurated duripan at 10 to 20 inches and fractured basalt bedrock at 20 to 40 inches - in the typical pedon, duripan 19 to 28 inches and lithic contact at 28 inches (https://soilseries.sc.egov.usda.gov/OSD_Docs/C/COLTHORP.html, HTTP 200); its type location is in Ada County. Against those are the wet, lime-rich soils of Canyon County: Bram, mapped at Caldwell and typed in Canyon County about 2 miles southeast of Caldwell, is a coarse-silty Xeric Haplocalcids that is somewhat poorly drained with a fluctuating water table at 3 to 6 feet for a few months or longer, a calcic horizon from 17 to 32 inches, and subhorizons that are slightly to strongly saline or saline-alkali (https://soilseries.sc.egov.usda.gov/OSD_Docs/B/BRAM.html, HTTP 200). Paulmyers, mapped in north Meridian, is a fine-loamy Aquic Calciargids with a fluctuating water table at 30 to 40 inches from June to August that the series description explicitly says is induced from irrigation (https://soilseries.sc.egov.usda.gov/OSD_Docs/P/PAULMYERS.html, HTTP 200). The Foothills and the southeast benches are the third zone: the Aldape-Dangulch-Castlerock complex on 8 to 35 percent slopes is fine, smectitic and shrink-swell (Aridic Palexerolls, Calcic Argixerolls, Torrertic Argixerolls), and further up-slope the Hullsgulch-Quailridge-Cranegulch complex is fine-loamy to fine, mesic Aridic Argixerolls on 5 to 65 percent slopes (https://soilseries.sc.egov.usda.gov/OSD_Docs/H/HULLSGULCH.html and https://soilseries.sc.egov.usda.gov/OSD_Docs/Q/QUAILRIDGE.html, both HTTP 200). For an artificial turf build that means three things: base excavation and edge restraint can hit a cemented or indurated duripan at 10 to 40 inches, so final depth is whatever the pan allows, not whatever the spec says; in Canyon County the same excavation meets a seasonally high water table and saline-lime subsoil, where drainage, base course selection and what happens to the grade line under freeze-thaw matter more than the topsoil; and on the foothill smectitic clays the native soil shrinks and swells with moisture, so subgrade preparation and edge detail are the failure points. Urban land is the mapped unit over much of built-up Boise and west Boise, so verify the actual lot with USDA-NRCS Web Soil Survey before finalising base depth (https://websoilsurvey.nrcs.usda.gov/app/).
What a licensed pro checks before quoting
The first question is whether the fibre has failed or only the infill has, because the two carry very different prices. Everything else follows from that.
- The product spec sheet. Face weight in ounces per square yard, pile height, backing layers and UV stabilisers. Ask to see it rather than accepting a description, because face weight and pile height are the published drivers of how long a turf looks full.
- Infill type, amount and level. What the infill is made of, how many pounds per square foot were installed, and how far it has settled below the blade base. The manufacturer's recommended rate is typically 4 to 8 kilograms per square metre, brushed in against the pile.
- Whether the fibres still have life in them. A blade that springs upright when brushed is a candidate for a top-up; one that is brittle, bleached through and snapping is not.
- The base under the flat spots. Whether the surface is moving because the base is shallow or poorly compacted, because a top-up over a shifting base will not hold.
- The warranty, in writing. Manufacturers typically warrant the material 8 to 15 years against fading and fiber breakdown, and installers warrant workmanship 1 to 5 years. Check what a fading claim actually covers before relying on it.
- Price for both scopes. A top-up and brush, against a re-surface priced per square foot - so the decision is a comparison rather than an assumption.
How to prevent it
- Buy the face weight, not the colour. Higher face weight, denser backing, more backing layers and genuine UV stabilisers are what keep a lawn looking full and green for its whole life rather than for its first two summers.
- Insist on the correct infill at the correct rate - and check it. Ask for the infill type and pounds per square foot in writing, and check it during installation. Infill that is skipped to save money shows up as flat lanes within months.
- Brush it against the pile. Regular brushing or power-brooming lifts matted blades and redistributes infill to where it has thinned, especially on the busiest routes. Use a synthetic-bristled brush or turf rake - metal bristles tear the fibres.
- Top up the infill every year or two in heavy-use areas. This is the cheapest maintenance on the whole system and it protects the backing from UV at the same time.
- Spread the traffic. Move furniture periodically and, where the yard allows, give a dog more than one route so one strip is not taking all the wear.
- Keep the surface clean. Remove leaves, dust and debris so the fibres are not sitting under a layer that holds moisture and blocks light, and rinse pet areas so UV is not working alongside a chemical problem.
- Fix the base while you still can. If wrinkles accompany the flat spots, treat it as a drainage and stability problem first - a re-surface over a base that moves repeats the failure.
What a top-up or a re-surface costs
The published severity ladder is short and it is worth reading in order, because the scope jumps between the tiers: minor cases may only need sealing or resurfacing, moderate damage may require section replacement or levelling, and severe structural issues typically need full replacement with proper site preparation.
| Scope | Ballpark |
|---|---|
| Minor cases - infill top-up, brushing, re-levelling a section | a few hundred dollars |
| Moderate damage - section replacement or levelling | several thousand |
| Severe structural issues - full replacement with proper site preparation | full rebuild scope |
| Turf and infill, basic turf with silica sand | $4.00 per sq ft combined |
| Turf and infill, premium rapid-drain turf with zeolite infill | $6.00 per sq ft combined |
| Labour, standard installation | $5.50 per sq ft |
| Labour, pet installation | $6.50 per sq ft |
| 500 sq ft standard system, all in | $4,970.00 ($9.94 per sq ft) |
| 500 sq ft engineered pet system, all in | $6,827.00 ($13.65 per sq ft) |
Two things make the decision easier. Infill is the cheapest component of the entire system, so a top-up and a brush is the first thing to try on any lawn that is flat rather than bleached. And a lawn that is being re-surfaced should be priced with the base in view: a straight turf swap over a shallow or dense-graded base buys one more cycle of the same failures. The published lifespan for these systems is 15 to 20 years with proper maintenance, which is long enough that the specification you choose - and the infill you keep up - decides most of the outcome.
Frequently asked questions
Why does some turf look flat and matted after a year?
Four causes, in order of how often they show up: low face weight in the product, too little infill, no brushing, and dogs running the same path. Face weight and pile height decide how full the turf can look, and infill is the ballast that holds the blades upright and shields the backing. Where infill was skipped or has settled, the blades lie over and stay over, and the wear shows up first in traffic lanes. A top-up and a brush against the pile is the first thing to try, and it is priced at the low end of the ladder.
Is fading covered by the warranty?
It depends on what the warranty says, so get it in writing and read it before you rely on it. Manufacturers typically warrant the material 8 to 15 years against fading and fiber breakdown, while the installer's workmanship warranty runs 1 to 5 years - and those are two different documents covering two different things. A lawn that has faded well inside the material warranty is worth pursuing; one that has faded on the far side of it is a replacement decision priced per square foot.
Can I add infill to an existing lawn myself, or does it need a pro?
Infill can be topped up on an existing lawn, and it is the cheapest maintenance there is, but the amount and the material both matter. The published installation rate is typically 4 to 8 kilograms per square metre, brushed in against the pile with a stiff broom or a power brush, and an uneven spread leaves uneven blades. Use the right infill for the yard - silica sand as the standard choice, a zeolite or antimicrobial product where pets use the lawn, and never untreated silica sand in a pet yard, where it acts as an odor reservoir.
Related
Sources
- US EPA UV Index scale - what very high and extreme sun exposure does to an outdoor surface in Boise
- National Weather Service - local climate records, normals and extremes for Boise and the Treasure Valley
- USDA-NRCS official soil series descriptions - the series mapped across Ada County (Boise, Meridian, Eagle, Kuna, Star) and Canyon County (Nampa, Caldwell) - the two Treasure Valley counties on either side of the Boise River