A 362 mm seat build in six layers. The 100 mm support foam and the 180 mm pocket spring unit decide how the seat feels at year three; the other four layers decide how the seat feels in the showroom.
What this site is
Sprung.ae takes apart sofas, mattresses and chairs sold in Dubai, records the foam densities, the spring wire gauges and the joint types, then explains what each number does to comfort and to service life. Sprung.ae publishes no brand rankings, carries no affiliate links, and uses no adjective in place of a measurement.
Four long articles cover the four components that decide whether a sofa is still comfortable at year five: the foam inside the cushion, the geometry of the seat, the spring unit under a mattress, and the timber frame carrying all three. Every figure on sprung.ae came off a tape measure, a 0.1 g scale, a dial gauge or a published manufacturer spec sheet, and each article names the standard behind any figure not measured directly.
Articles
Foam
Polyurethane foam density runs 21 to 45 kg per cubic metre, and the grade decides service life more than any other number on a cushion spec sheet. A D21 seat core dishes after 24 months under an 80 kg adult. A D35 high resilience core holds height past year ten. Dubai re-foaming cost AED 900 to 1,400 in July 2026.
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Seating
A sofa advertised at 1100 mm deep leaves usable seat depth near 900 mm, while a 175 cm adult needs 560 mm and ends up perching on the front third with no back contact. Usable depth, seat height against popliteal height, and back angle between 100 and 112 degrees are the three figures that decide comfort.
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Springs
Bonnell wire runs 1.9 to 2.4 mm, continuous coil 1.6 to 2.0 mm, pocket springs 1.2 to 1.6 mm, and each gauge produces a different feel. Four counting tricks inflate the number printed on a mattress label, and coils per square metre defeats all four. Honest pocket units land at 330 to 470 coils per square metre.
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Frames
A dowelled and blocked beech corner deflects 2 mm under a 90 kg centre load and lasts 15 to 25 years. A stapled pine corner deflects 11 mm and fails inside three. Kiln dried hardwood at 8 to 12 percent moisture, 10 mm dowels and 75 mm corner blocks are the details worth checking under the dust cloth.
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Foam density is measured by cutting a 100 mm cube from a cushion, weighing that cube on a scale reading to 0.1 g and multiplying grams by 1000, which converts grams per litre into kilograms per cubic metre. Seat dimensions are taken twice with a 5 m steel tape, empty and loaded.
| Measurement | Instrument | Unit reported | Repeatability |
|---|---|---|---|
| Foam density | Kitchen scale, 100 mm cut cube | kg/m3 | Plus or minus 1 kg/m3 |
| Usable seat depth | 5 m steel tape, seated adult | mm | Plus or minus 5 mm |
| Back angle | Digital angle gauge | degrees | Plus or minus 1 degree |
| Coil count | Hand count through an unzipped panel | coils per m2 | Exact |
| Frame deflection | Dial gauge, 90 kg centre load | mm | Plus or minus 0.5 mm |
A seat cushion measuring 460 mm deep in an empty showroom sofa reads 420 mm once an 80 kg adult sits back in it, so sprung.ae reports the loaded figure and states the load. Mattress spring counts are recounted by hand through an unzipped panel rather than copied from a label, because four separate counting conventions produce four different numbers for the same unit.
Prices on sprung.ae are Dubai retail in AED, each carrying the month the price was checked, and Dubai furniture prices move. Treat every AED figure as an order of magnitude for the month stated beside it, and treat every millimetre, degree and kg/m3 figure as exact within the repeatability column above.