Shamal season: dust is the enemy of a good finish
The shamal — the north-westerly wind that carries fine desert dust across the Gulf — blows hardest in early summer, typically late May through July, with a lesser winter season around December and January. For painters, shamal days are a quiet disaster. Airborne dust settles on tacky paint and reads as a gritty, sandpaper texture under raking light; it contaminates wet edges on exterior work; and it finds its way indoors through window seals and door gaps faster than most residents expect.
Dust matters before the first coat too. UAE walls that have gone two or three years without painting carry a fine film of settled dust bonded with humidity, and paint applied straight over it adheres to the dust, not the wall. Proper prep — washing, light sanding, spot-priming patches — is the least glamorous line in a quote and the one most worth paying for.