By Mark Wu, Co-founder & Technical Director, Sichuan Zhifang Net Industry Co., Ltd.
A weed mat quotation usually arrives as one line: "black woven ground cover, 2 m wide, 100 m roll, price per roll".
That is not enough to compare two offers, and it is why two quotes that look similar in price can be wildly different products. Here are the six lines that should be on every quotation, and what each one actually predicts.
Weight is the first number to compare, and the one most often left out.
It is quoted either in grams per square metre or ounces per square yard, depending on where the supplier sits. 6 oz is roughly 200 gsm; 4.75 oz is roughly 160 gsm; a typical agricultural ground cover runs 90 to 150 gsm, while heavy commercial grades go higher.
Weight predicts three things: how long the mat holds tension, how well it resists puncture from boots and stakes, and how quickly it fails once UV has done its work. It does not predict shade, because all opaque mats block light completely.
Three constructions are sold under the same name.
Woven is a grid of flat tapes. It holds tension, drains through the gaps, and is the standard for rows and orchards.
Non-woven is a mat of fibres. It distributes water laterally, cuts cleanly, and is soft to handle, but it stretches under load.
Hybrid fuses both, usually a woven base with a non-woven face. It exists because buyers wanted woven strength with non-woven water behaviour, and some hybrids also carry printed planting stripes at fixed intervals, which is genuinely useful on a commercial row.
This is the line that decides the mat's real life, and it is the line most often written as a vague promise.
"UV treated" is a sentence. A guaranteed dose in kly is a specification. If the supplier only offers years, ask what the years assume: buried, mulched, or fully exposed. The same mat can be a five-year product in one position and fifteen in another.
Where a supplier quotes a long life, such as twenty-five years, the honest question is under what exposure. A mat buried under mulch in a temperate climate is barely tested by ultraviolet. A mat holding down a windy, sunny orchard row is being tested every day.
Width decides how many seams you have, and seams are where mats fail first.
Two metres is common; three and four metre widths exist and cost more per square metre. On a wide orchard row, the wider roll removes an entire seam line, and that is usually worth the difference. On a narrow bed, it is waste.
Length matters for a different reason: a long roll means fewer cross joins in a row, and fewer places for a join to lift.
Not usually printed on the quotation, and the first thing to ask about.
A heat-sealed or stitched edge stops the tapes running. A raw cut edge will start to fray at the first handling, and once a run starts, the panel loses tension from that corner inward.
If the price is much lower than another offer of the same weight and width, the edge is often where the difference is.
Water passage is quoted as a flow rate, and most buyers ignore it. The useful distinction is simpler: does water pass through the fabric structure (non-woven) or through the gaps between tapes (woven)?
Both drain. But a very tight weave sheds water on a slope, and a very open one lets fine silt through, which then becomes a seed bed on top of the mat. If your soil is silty and your site is sloping, that detail matters more than the weight.
Three things a spec sheet cannot answer, and you should ask anyway.
How it behaves when lifted. A mat that tears on removal is a one-installation product, whatever the UV figure says.
How it handles a stake. Ground pins through a tight weave hold well; through a loose weave they pull out in wind.
What it looks like after a season of silt. Some fabrics shed dust and rain clean. Others hold it, and the mat becomes a seed bed.
Put the six numbers side by side, then divide price by expected years. A mat at a higher price per square metre that lasts twice as long is the lower-cost mat, before you count the labour of laying it again.
If a supplier cannot give you weight and UV dose, that is the answer to the comparison. They are selling a roll, not a specification.
Sichuan Zhifang Net Industry Co., Ltd. has been making woven ground cover and shade netting since 2011, from a plant of nearly 10,000 m² with more than 50 production lines, supplying growers in 32 countries. Our ground cover is woven from 100% virgin HDPE with a guaranteed UV stabilisation of 500 kly, in weights from 90 to 150 gsm, and every roll carries a ZF security label inside the pack.
For a permanent row, yes up to a point. Past the weight the frame and soil can carry, you are paying for stiffness nobody needs. For a seasonal bed, a lighter mat is the rational choice.
Roughly 160 gsm. The conversion is about 33.9 grams per ounce per square yard, so multiply ounces by roughly 34 to compare with a metric quotation.
Construction and edge finish. A woven 150 gsm and a non-woven 150 gsm behave nothing alike, and a finished edge changes how both handle. Weight is the starting number, not the whole story. If you want the comparison of material types rather than numbers, this covers it, and the ground cover range lists weight and width per item. Heavy woven grades are the ones quoted for orchard rows.
