Roof Waterproofing in Pakistan: Chemical Coating vs Membrane and the Right Time to Do It

Damp patches on the ceiling, peeling paint in the top-floor rooms and water on the stairs every monsoon come from one place: the roof. Waterproofing it properly stops the damage and the yearly repainting that goes with it.

The two questions every owner asks are which method to use and when to do it. The short answers: it depends on the roof’s condition, and before the rains, not during them.

Why it happens in Pakistani homes and buildings

Concrete roofs develop hairline cracks from heat and movement; water pools where the slope is poor; old bitumen fails. Water finds the cracks, travels along the slab and appears as damp far from where it entered.

Signs you need roof waterproofing

• Damp patches or peeling paint on top-floor ceilings
• Water pooling on the roof after rain
• Cracks in the roof surface or around parapets
• Previous waterproofing more than a few years old

How Shield Agro does roof waterproofing

1. Inspection. We inspect the roof and the rooms below, trace the leak paths and identify pooling and cracks.
2. Surface preparation. The roof is cleaned, cracks opened and filled, and damaged screed repaired.
3. Drainage correction. Slope is corrected where water pools and outlets are cleared and sealed.
4. Coating. Liquid waterproofing is applied in multiple coats with reinforcing fabric at weak points.
5. Water test and handover. The roof is flooded and checked before handover, with the scope documented.

What is included

• Leak tracing from above and below
• Crack filling and screed repair
• Slope correction to drains
• Multi-coat liquid waterproofing system
• Reinforcement at parapets, joints and outlets
• Water pond test before handover

What does roof waterproofing cost in Pakistan?

Roof Waterproofing is priced on site after a free inspection. Priced per square foot by the method chosen and the condition of the roof, quoted after a site visit. There is no call-out charge, and the price we agree is the price you pay.

How to keep the problem from coming back

• Keep roof drains clear so water does not pool
• Fix the slope where water collects
• Waterproof before the monsoon so the coating cures in dry weather
• Do not paint over damp; treat the roof first

Frequently asked questions

What decides the cost?

The roof area, how much repair the surface needs before coating, the number of parapets, outlets and pipes to detail, and the coating system chosen. We measure and inspect before giving a fixed per-square-foot price.

Can it be done in the monsoon?

The surface has to be dry for the coating to bond, so we schedule around dry days and cover work if a shower arrives. The best time is before the rains, when the roof is dry and the leaks from last year are known.

Can we walk on the roof afterwards?

Yes for normal foot traffic once fully cured, typically a few days. Heavy fixtures, water tanks and AC units should sit on pads rather than directly on the coating, and we detail around any that are already there.

Book roof waterproofing with Shield Agro

We are based in Johar Town, Lahore, and cover waterproofing across Pakistan, with teams in Lahore, Karachi, Islamabad, Rawalpindi, Faisalabad and Multan and scheduled visits elsewhere. Read the full service page for Roof Waterproofing, book a free inspection, call 0321-4583500 or message us on WhatsApp with a photo of the problem and your area. We reply under 30 minutes in working hours.