The best pergola shade covers

The densest fabric on this page, from the only brand in the category that publishes how its cloth is built.

Knitted HDPE at up to 90% UV block, in a tape and monofilament construction, with air flowing through the knit. Ninety per cent is the figure that makes a pergola genuinely comfortable at midday rather than merely patterned — and it still breathes, which is why it does not balloon on the rafters the way a solid panel does.

A fifteen-year fabric warranty against cracks, splits and tears due to UV degradation. That is the longest published term on any shade fabric we track, by a very wide margin, and it is written against the exact failure mode that kills shade cloth: the cloth going brittle and splitting rather than tearing from a snag.

6 x 15 ft, 6 x 50 ft, 6 x 100 ft and 12 x 50 ft. The 12 ft width is the useful one on a pergola — it lets you span a 10 to 12 ft bay in a single piece rather than seaming two runs over a rafter.

The honest cons: it blocks rain not at all, and it is a knitted fabric with no edge hardware. Grommets, lacing cord or batten strips are a separate purchase, and a cover with no tensioning provision will sag into a water-collecting pocket in a week. How to add shade to a pergola covers the fixing methods that actually hold.

The only fabric here sold cut to your dimensions, which on a pergola is frequently the whole problem solved.

Custom cut from 6 to 24 ft wide by 1 to 300 ft long. Pergola bays are rarely 6 ft, and a cover seamed across a rafter is a cover that fails at the seam. Buying the exact span is worth more than any spec on this page.

180 GSM knitted polyethylene at a 75% block rate, up to 95% UV stabilized, in a lock-stitch knitted construction. Note that the two percentages are different things: 75% is how much light it stops, 95% UV stabilized is how well the fibre resists being destroyed by it. GSM and shade percentage explained separates them properly.

A three-year limited warranty, which is ordinary for the category and five times shorter than Coolaroo's.

And the published trade, in the maker's own words: a cut edge, no edge taping. Grommets, tape and fixings are all a separate purchase, and an untaped knitted edge will run if it is loaded hard at one point. Budget for edge tape or a batten the whole way round.

A different approach to the same problem, and for many pergolas the better one: instead of lying a cloth on the rafters, tension a finished sail above them.

190 GSM virgin HDPE mesh at 95% UV block, breathable, with reinforced stitched seams. This is a manufactured product with a hemmed edge, so there is nothing to tape and nothing to run.

A stainless steel D-ring at each corner. That is the real argument for a sail over a cloth: four defined load points you can tension properly, rather than a cut edge you are trying to hold along its whole length. A tensioned fabric does not flap, and fabric that does not flap does not wear out.

Three years under normal weather and usage, in fourteen sizes from 8 x 10 ft to 16 x 20 ft.

The cons: cable rope and hardware kits are sold separately, and tensioning above a pergola means the sail has to clear the rafters, so you need height to play with. Shade sail sizing and tension covers the geometry, and best shade sails ranks the field.

The least expensive cover on this page, and it is not a lesser product — it is a lesser density, which for a lot of pergolas is the right answer.

Knitted HDPE at up to 70% UV block, breathable. Seventy per cent takes the sting out of afternoon sun while leaving the space underneath feeling like a garden rather than a room. For a dining pergola used in the evening it is frequently the better choice than 90%.

6 x 15 ft, 6 x 50 ft, 6 x 100 ft and 12 x 50 ft — the same width options as the 90% fabric, including the 12 ft roll that spans a bay in one piece.

The gap worth naming: Coolaroo publishes no warranty term for this density, where the 90% and the 50% garden fabric both carry fifteen years against UV degradation. Same brand, same knitted HDPE, no published term — so if a warranty is part of the decision, the denser fabric is the one with a document behind it.

Same fixing requirement as every cloth here. No hardware, no edge treatment, no tensioning provision in the box.

Included because a lot of people searching for a pergola cover want to keep a table dry, and no fabric above will do it at any density.

Terylene polyester, waterproof, UV 95, on a webbing-reinforced perimeter. A solid coated fabric rather than a breathable mesh — it sheds water instead of passing it.

And that is a real trade, not a free upgrade. A waterproof panel catches wind in exactly the measure it sheds rain, because there is nothing for a gust to pass through. Over a pergola it has to be pitched to drain or it will pond, and a pond deepens as it fills. Do shade sails block rain sets out what each fabric type actually does.

Three years, on a webbing edge rather than a cable one — adequate for a modest span and not for a large or windy one.

The honest recommendation: if you want rain cover over a pergola permanently, a solid roof is the right answer rather than a fabric one. Best pergolas with a roof ranks the structures that do it properly.