One brief, four kinds of outdoor product
Every fault an inspection misses meets rain, sun, frost and, near the sea, salt air for months. The checks below apply across all outdoor ranges. Each material then has its own page with the detailed checklist:
| Product | Main outdoor risk | Detailed page |
|---|---|---|
| Teak, acacia, mango or sheesham pieces | Wet wood oiled too soon, unsealed end grain, tannin stains round steel screws | Outdoor wooden furniture |
| Steel or aluminium dining and lounge sets | Rust at welds under the powder, sealed tubes, mixed parts between sets | Outdoor metal furniture sets |
| Rope, wicker-strand and woven chairs | Slack weave, loose rope ends, frame coating scraped during weaving | Rope and woven outdoor furniture |
| Parasols, hammocks and gazebos | Wind load, rib and pole locks, hammock load, incomplete kits | Parasols, hammocks and gazebos |
Weathering and coatings: what we check
An outdoor finish has to cover every face. Water finds the underside of a seat, the inside of a tube and the foot of a leg first.
| Check | How it is checked | What fails |
|---|---|---|
| Hidden-face coverage | Pieces turned over; undersides, inner rails, leg feet and tube ends viewed in good light | Raw wood or bare metal on faces that face the ground or hold water |
| Coating at welds and edges | Every accessible weld and sharp edge checked; magnetic gauge reading on steel frames (ISO 2178 method) | Pinholes, bubbles or rust bloom at welds; thin coat on edges |
| Coating adhesion | Cross-cut test (ISO 2409) on a hidden area, reject piece or batch test panel | Coat lifting in the grid, a sign of poor pre-treatment |
| Wood finish cure | White cloth rubbed on oiled or lacquered surfaces | Tacky finish, colour transfer to the cloth |
| Drainage | Water poured on seats and table tops; hollow sections checked for a drain hole at the low point | Pooling water, sealed tubes, drain holes blocked by powder |
Salt spray tests to ISO 9227 take many hours in a lab cabinet and need a pass level written into your specification; we pull and seal samples for an accredited lab rather than run them on site.
UV resistance: a lab result, checked on the goods
Sunlight fades colour, chalks some coatings and makes plastic strand and rope brittle. Whether a rope, strand or cushion fabric resists it is shown by weathering tests, such as ISO 4892-2 xenon-arc exposure for plastics and ISO 105-B02 colour fastness to artificial light for textiles, plus the material supplier's data sheet. No inspector can see UV stability.
The EN 581 series covers the safety, strength and durability of outdoor seating and tables, but EN 581-2:2026, which replaced EN 581-2:2015 on 2 June 2026, states that it does not include resistance to ageing and degradation caused by light, temperature and moisture. A UV requirement therefore has to be written into your order on its own. What the inspection can do is make sure the shipped material is the material that was tested: colour reference, rope diameter and construction, and the supplier's batch label compared with the approved sample and the lab report.
Stability on patios, decks and lawns
Indoor furniture stands on a level floor. Outdoor furniture stands on paving joints, decking boards and grass. The inspector checks each sampled piece on a flat floor first, because a chair that rocks there will be worse outside:
- Rocking. Leg lengths and frame twist; adjustable glides present and working where specified.
- Tipping. Reclining and rocking chairs leaned back by hand; stacking chairs checked for a backwards tip when a person leans on the back.
- Folding and adjusting parts. Locks loaded by hand in the open position; gaps checked where frames cross, since a finger trap on a folding chair is a critical defect.
- Parasol bases and anchors. Base weight and fixing against the canopy size in the specification.
Strength and durability tests in EN 581 are lab tests on production samples. See EN furniture testing.
Hardware corrosion: bolts, screws and hinges
Fixings are often the first part to fail outdoors. A rusting bolt stains wood, locks threads and weakens its joint.
| Fixing | Outdoors | On-site check |
|---|---|---|
| Zinc-plated steel | Thin zinc layer; rusts quickly in rain | Strongly magnetic; bright, thin plating |
| Hot-dip galvanised steel | Thick zinc layer; much longer life than plating | Magnetic; dull grey, visibly thicker coat |
| Stainless steel A2 | Good for most inland gardens | Head mark such as A2-70 on bolts that carry one |
| Stainless steel A4 | Contains molybdenum; often specified for coastal sites and pool areas | Head mark such as A4-80; a magnet cannot tell A2 from A4 |
Austenitic stainless steel is usually non-magnetic or only weakly magnetic, so a magnet catches plain or plated steel but does not prove the grade. Grade and property class for stainless bolts are set out in ISO 3506-1; ask for the fastener supplier's certificate if the grade matters. Steel screws in aluminium frames, and iron in tannin-rich woods such as acacia, cause corrosion or black staining even before rust shows, so mixed metals are checked against the hardware list. Hinges, parasol cranks and folding brackets are checked as well as the bolts.
Common outdoor furniture defects and how they are classed
| Defect | Class | Why |
|---|---|---|
| Folding lock that releases under load, or a finger trap | Critical | Collapse or crushing injury in use |
| Recliner or rocker that tips backwards in normal use | Critical | Fall risk |
| Plain or zinc-plated fixings where stainless or galvanised was ordered | Major | Rust and stains within weeks outdoors |
| Bare metal or raw wood on hidden faces | Major | Rust creep, swelling and splits |
| Hollow section with no drain hole; seat that holds water | Major | Internal rust, rot, frost damage |
| Rope, strand or fabric that differs from the approved, tested sample | Major | UV and colour performance no longer covered by the report |
| Piece rocks on a flat floor | Major | Worse on paving; unusable for many customers |
| Small coating marks on non-visible faces, minor colour variation within tolerance | Minor | Cosmetic, if the coat is intact |
What to put in your purchase order, and when to inspect
- Finish system per material: oil or lacquer and coats for wood; powder only, hot-dip galvanising or both for steel; pre-treatment for aluminium.
- Coating thickness and the cross-cut class required; salt spray hours and pass criteria if you need a lab test.
- Fixing material and grade for every bolt, screw, washer and hinge.
- UV requirement for rope, strand and cushion fabric, with the test standard and the data sheet you accept.
- Drainage details, glides or adjustable feet, and the stability checks the inspector should run.
- The markets you sell in, so cushion fire labels and timber declarations are checked for the right rules: UK fire safety, EUDR, Lacey Act.
Book a during-production inspection before frames are coated, while the protection system can still be seen and changed, and a pre-shipment inspection once the order is fully made and at least 80% packed. Outdoor ranges ship for the spring season, often in full containers, so loading supervision by set is worth adding. Prices are on the pricing page.
Sources
- eCFR: 16 CFR 1640.3, definition of upholstered furniture (intended for indoor use)
- EVS: EN 581-2:2026, outdoor furniture, seating (scope; replaced EN 581-2:2015, withdrawn 2 Jun 2026)
- SIS: SS-EN 581-1:2017, outdoor seating and tables, general safety (abstract)
- ISO 3506-1:2020, mechanical properties of stainless steel fasteners
- ISO 2409:2020, Paints and varnishes: cross-cut test
- ISO 9227:2022, Corrosion tests in artificial atmospheres: salt spray tests
- ISO 4892-2:2013, Plastics: exposure to xenon-arc lamps