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N (nitrogen) drives leaf growth, P (phosphorus) roots and flowering, K (potassium) stress and heat tolerance. In the UAE use a slow-release feed every 8–10 weeks from October to May, and cut feeding back sharply in peak summer — pushing new growth at 45 °C burns the plant.

Red palm weevil (chewed holes and a fermented smell at the crown), mealybug (white cottony clusters), whitefly, red spider mite (fine webbing and silvery leaf speckling) and scale insects. Inspect weekly — horticultural oil or insecticidal soap solves most infestations if you catch them early, before any chemical spray is needed.

Screen filters (120 mesh) suit clean mains water; disc filters handle algae and organic matter; sand media filters are for well or treated-sewage-effluent water. Clean or backwash every 2–4 weeks. A pressure difference above 0.5 bar between inlet and outlet means the filter is blocked — the single most common cause of dry patches in a lawn.

Water before sunrise or after sunset — midday irrigation loses up to 30% to evaporation. Deep and infrequent beats short and daily: it pulls roots downward. Yellowing leaves plus algae on the soil surface means over-watering; wilting at noon that recovers by evening is normal heat stress, not thirst.

Never remove more than one third of the blade in a single cut. Keep Paspalum and Bermuda lawns at 25–40 mm: taller grass shades the soil, holds moisture and crowds out weeds without any herbicide. Sharpen mower blades each season — a torn tip browns and invites disease.

Usually salt build-up, not disease. Gulf irrigation water leaves salts behind as it evaporates. Leach the bed once a season with 15–20% extra water to push salts below the root zone. Soil EC above 4 dS/m damages most ornamental planting — a cheap meter reading tells you more than a guess.

Free chlorine 1–3 ppm and pH 7.2–7.6 for a residential pool. Above pH 7.8 chlorine loses more than half its killing power and the water turns cloudy; below 7.0 it corrodes grout, ladders and eyes. Test twice a week in summer, weekly in winter.

Unstabilised chlorine burns off in under two hours of Gulf sun. Cyanuric acid — the stabiliser — at 30–50 ppm protects it. But above 100 ppm it locks the chlorine up instead, and the only fix is partly draining and refilling.

Total alkalinity 80–120 ppm keeps pH from bouncing; calcium hardness 200–400 ppm stops the water leaching calcium out of plaster and grout. High calcium leaves the white scale line at the waterline; low calcium eats the pool itself.

Sand traps 20–40 microns and is backwashed when pressure rises 0.5–0.7 bar above clean. Cartridge traps 10–15 microns and is rinsed every 4–6 weeks. DE is the finest at 2–5 microns. Whichever you have, run a full turnover — 6–8 hours of filtration a day in UAE summer.

A leaf skimmer net daily, a wall brush weekly (nylon bristles for vinyl and fibreglass, stainless only on bare concrete), a manual vacuum or a robotic cleaner, a telescopic pole, and a test kit. Empty the skimmer and pump baskets every few days — a blocked basket starves the pump and burns the motor.

Brush the walls and floor before vacuuming so the dust is suspended, run the filter continuously for 24 hours, then shock at night — daylight destroys the shock dose before it works. Check the filter pressure the next morning.

A salt cell makes chlorine from 3,000–4,000 ppm of dissolved salt, so you handle no chemicals weekly — but the chemistry rules are identical. Clean scale off the cell plates every 3–6 months, and watch TDS: more than 1,500 ppm above your fill water means it is time to dilute.

Double glazing with a 12–16 mm cavity cuts heat transfer by roughly half compared with single glass. In a UAE glass majlis that is not a comfort upgrade — it is the difference between a room you use and a room you close in May.

It reflects infrared while letting visible light through, bringing the solar heat gain coefficient (SHGC) down to about 0.25–0.35. You keep the daylight and the view and lose most of the heat — exactly the trade you want here.

Tempered is 4–5 times stronger and shatters into blunt granules. Laminated holds together on an interlayer, cuts noise and blocks around 99% of UV — so fabrics and timber inside do not fade. Many majlis projects use laminated on the sun side and tempered elsewhere.

Budget roughly one ton of cooling per 9–12 m² — about double a normal room of the same size. If the load looks impossible, insulate the roof rather than buying a bigger unit: the roof, not the glass, is usually the largest single heat source.

Condensation forms where humid outside air meets a cold surface. An aluminium frame without a thermal break conducts the cold straight through and drips. Specify thermally broken profiles and the problem disappears — retrofitting them does not.

Water with a neutral detergent and a rubber squeegee. Avoid ammonia cleaners and any metal blade — both scratch coatings permanently. Inspect the silicone and gaskets once a year; a failed seal fogs a double-glazed unit from the inside and cannot be cleaned.

Ask a structural engineer before drawing anything. An intensive roof garden can reach 300–500 kg/m² once saturated; a lightweight extensive scheme stays at 80–150 kg/m². Saturated weight, not dry weight, is the number that matters.

A root barrier membrane laid over the waterproofing, plus a protection board. Flood-test the roof for 48 hours before a single layer goes on top — finding a leak afterwards means lifting the entire garden.

A dimpled drainage board holds a little water and passes the rest, with a geotextile above it so soil never reaches the outlets. Keep every drain inspectable — a blocked outlet under 300 mm of substrate is invisible until the ceiling below stains.

Because it is heavy and it compacts. Engineered lightweight substrates using perlite, pumice and coir cut the weight 30–40% and keep air in the root zone, which is exactly what compaction destroys.

Wind speed at upper levels runs 20–30% higher than at ground. Anchor planters and shade structures, keep planting low and broad-rooted, and avoid loose gravel near a parapet — anything that can move eventually will.

Drip on a timer with a rain sensor, zoned separately from the ground-level garden. Evaporation on an exposed roof is far higher, and a rooftop bed dries out in a fraction of the time the same planting would at ground level.