I just checked out this blog on Why Waterproof Windows Are a Non-Negotiable in Coastal Cities Like Chennai, and it really struck a chord. The posts makes a strong case for using aluminium windows that are waterproof and durable — they can stand up to heavy rains, high humidity, salt in the air, and even cyclonic winds without letting water seep in or rust take over. If you live near the coast and hate dealing with damp walls or mould every monsoon, this one’s a must-read: