New Zealand’s summer UV index regularly hits 12 and above – around 40% higher than a European city at the same latitude. That single fact explains why the “outdoor” cushions from a chain store go chalky and threadbare in two seasons. Choosing outdoor fabric in NZ means choosing for our sun first and everything else second.
Why most outdoor fabric fails here
Two things kill outdoor fabric: ultraviolet light and moisture. UV breaks down both the dye and the fibre itself. Moisture feeds mould in any fabric that holds water and rots natural fibres outright. Add salt if you’re near the coast, which corrodes fixings and abrades the surface.
Fabrics sold as outdoor overseas are usually tested to survive perhaps 500 hours of accelerated UV exposure. That is fine in Melbourne. In Nelson or Northland it is roughly one summer. For anything that stays outside, look for a UV rating of 1,000 hours or more, or better still a fibre that doesn’t rely on a finish at all.
Fibres ranked for NZ conditions
| Fibre | UV resistance | Mould resistance | Feel | Typical use |
|---|---|---|---|---|
| Solution-dyed acrylic | Excellent (8–10 yrs) | Excellent | Canvas-like, soft | Cushions, awnings, boat covers |
| Solution-dyed olefin | Very good (3–5 yrs) | Excellent | Slightly waxy | Cushions, sling seats |
| Solution-dyed polyester | Good (2–4 yrs) | Good | Soft, wide colour range | Cushions under cover |
| PVC coated polyester | Good | Fair (no breathing) | Firm, plastic | Waterproof covers, tonneaus |
| Piece-dyed polyester | Poor (1–2 yrs) | Fair | Soft | Indoor-outdoor only |
| Cotton canvas | Poor | Poor | Lovely | Don’t |
Solution-dyed acrylic: the benchmark
In solution-dyed fibres, the pigment is mixed into the liquid polymer before it’s spun, so colour runs through the fibre like a carrot rather than sitting on the outside like a radish. It cannot wash out or burn off. Acrylic on top of that is naturally UV-stable, dries quickly and resists mildew. It is the same material used for boat biminis, which tells you how tough it is. Our Coastal Outdoor Canvas is a solution-dyed acrylic in cushion weight.
Acrylic comes in two weights worth knowing: a cover grade around 300 g/m² for awnings and boat canopies, and a heavier cushion or “furniture” grade that’s woven tighter for abrasion. Use the cushion grade for anything you sit on – the cover grade is fine for a sail but will wear at the piping on a seat.
Olefin: the value option
Solution-dyed olefin (polypropylene) is cheaper than acrylic and beats it on stain resistance. UV life is shorter but still respectable under a pergola or on a covered deck. It doesn’t like heat, so keep it off black metal furniture in full sun and never iron it.
PVC coated fabric: covers, not cushions
For a fully waterproof cover – outdoor furniture, barbecue, boat, trailer – a PVC coated polyester is the right tool. It won’t breathe, so leave a gap for air, but it will keep rain out completely for years.
Matching fabric to the job
Deck and patio cushions
Solution-dyed acrylic or olefin, 300–350 g/m², in a woven (not knitted) construction. Use a quick-dry reticulated foam inside so a shower doesn’t turn the cushion into a sponge, and wrap it in a thin polyester wadding to soften the edges. Zips should be plastic coil, not metal.
Sling chairs and hammocks
These carry load, not just weather. Look for a PVC-coated mesh or a heavy solution-dyed olefin with a stated tensile strength. Standard cushion fabric will stretch and sag.
Awnings, shade sails and pergola curtains
Solution-dyed acrylic in the 300 g/m² cover weight is standard. For a permanently tensioned sail, a purpose-made HDPE shade cloth is better – acrylic will stretch under constant load.
Boat and marine
The same acrylic works for boom tents and mooring covers. For seats you actually sit on in the wet, switch to marine vinyl – our outdoor & marine range has both.
Fixings matter as much as fabric
We see far more cushions ruined by rust stains than by fabric failure. Within 5 km of the coast – which covers most of NZ – any plated staple, tack or press stud will corrode and bleed through in a season. Use stainless steel 71-series staples, stainless or nylon press studs and UV-treated bonded polyester thread. Ordinary sewing thread rots in sun long before the fabric does.
Colour and pattern in strong sun
Even solution-dyed fabric shows fade eventually; it’s just far slower. Darker, saturated colours make any fade more obvious. Mid-tones, heathers and small textures are the most forgiving. If you love navy or charcoal, buy the acrylic, and flip cushions regularly so both sides age together.
Making it last
- Hose off salt and pollen monthly; brush before it dries.
- Clean with mild soap and water. Solution-dyed acrylic tolerates a 1:10 bleach solution for mould – test first.
- Re-apply a fabric protector when rain stops beading, usually every 2–3 summers.
- Store cushions dry over winter. Our NZ fabric buyer’s guide has more on lightfastness ratings if you want the numbers.
A five-point checklist before you buy
- Is it solution-dyed? If the product page doesn’t say, assume it isn’t.
- What is the UV rating in hours? 1,000+ for anything left outside.
- Is there a mildew or antimicrobial treatment? Essential in Auckland and Northland humidity.
- Is it water-repellent (cushions) or waterproof (covers)? They’re different products.
- Do the width and the weight suit the job – 300 g/m² for cushions and covers, heavier for slings?
How much to order
Outdoor fabrics run 150–160 cm wide, wider than most indoor weaves. A standard 500 × 500 mm seat cushion with a 100 mm box takes about 0.7 m; a 1,800 mm bench squab about 1.5 m. Add 10% for a directional weave. For an awning or cover, measure at the longest and widest points, add 150 mm all round for hems and send the numbers to us via the contact page – we’ll check the width works before you cut.
If you’d rather not sew a fitted cover yourself, or you need a boat canopy patterned properly, our sister workshop Upholstery World in Auckland makes outdoor and marine covers to measure and is happy to work with fabric you’ve chosen from us.
Shop it: Solution-dyed acrylic, olefin and PVC coated fabrics are all in our outdoor & marine collection. Pair them with reticulated dry-fast foam from foam & padding, cut to your cushion size. Everything ships nationwide from our workshop — courier to any New Zealand address, or click & collect.