Wellcool offers expert terrace and balcony waterproofing services in Pakistan for houses, apartments and commercial buildings. We stop water leaking into the rooms below, protect tiled and plain terraces from monsoon rain and summer heat, and seal the edges, drains and door thresholds where most leaks begin.
★★★★★ Trusted by homeowners & businesses across Pakistan
Membranes designed for ponding rain and heavy downpours
Waterproofing under tiles or as an exposed coating
Inspection before any work begins
Terraces and balconies are among the most loved parts of a Pakistani home. Families use them for evening tea, drying clothes, potted plants, barbecues and catching the winter sun. But an open slab that sits directly above a bedroom, drawing room or shop is also one of the most leak-prone parts of a building. It faces direct monsoon rain, water from plant pots and washing, and extreme temperature swings from 45–50°C summer afternoons to cold winter nights. These cycles open up hairline cracks, loosen tiles and break down old waterproofing. When water finds a way through, it shows up as stains, dripping and peeling paint on the ceiling of the room below.
Wellcool provides complete terrace and balcony waterproofing in Pakistan, designed around how these spaces are actually used. We check the slope, drains, parapet joints, door thresholds, railing posts and tile condition, then recommend a system that suits your terrace: a membrane under new tiles, a walkable coating on a plain slab, or targeted repair of a tiled balcony without breaking the whole floor where conditions allow. The aim is a terrace you can use freely without worrying about the ceiling below.
Unlike a main roof, a terrace or balcony is walked on, decorated and often tiled, which hides problems until they reach the room below. The most common cause is poor slope. If the floor does not drain towards the outlet, rainwater ponds for hours or days and slowly forces its way through tile joints and cracks. Blocked or undersized drain outlets, often choked with leaves, dust and plant soil, make ponding worse during monsoon storms.
The second big cause is joints and edges. The junction between the floor and the parapet or boundary wall moves with temperature and opens up over time. Door thresholds where the terrace meets an indoor room are frequently left without a proper upstand, so water flows straight under the door frame. Railing posts and grill anchors drilled into the slab, AC drain pipes, water taps and electric conduits all create small openings. Old cement tile grout cracks and lets water sit beneath the tiles, where it cannot evaporate. Over the years this trapped water travels across the slab and appears as a leak in a completely different spot below.
Watch for these signs both on the terrace and in the room underneath:
Pakistani terraces usually fall into two types. The first is the tiled terrace or balcony, finished with ceramic, porcelain, marble chips or terrazzo. Here the waterproofing must sit beneath the tiles. When leaks are severe, the best long-term repair is to remove tiles and screed, waterproof the slab with a flexible membrane, carry it up the walls and into the drain, then re-tile. For limited problems, we may be able to treat grout lines and joints with penetrating and sealing products, but we tell you honestly when this will only be a short-term fix.
The second type is the exposed or plain terrace, usually a cement-finished slab or a roof-top terrace. Here a walkable liquid-applied membrane, such as a polyurethane or acrylic system with a top coat, can be applied directly after preparation. These coatings form a seamless skin with no joints, can be reinforced at cracks and edges, and some also reflect sunlight, helping reduce heat in the room below during summer.
We fix ponding at the source, not only the surface
Door edges and upstands sealed to stop indoor leaks
Systems suitable for daily foot traffic and furniture
We explain when tiles must come up and when they need not
For plain and roof-top terraces, a polyurethane membrane is applied in multiple coats to form a seamless, elastic skin that bridges hairline cracks and moves with the slab as it expands in summer heat and contracts in winter. A UV-stable top coat protects it from sunlight and foot traffic. Reinforcing fabric is embedded at cracks, corners and parapet joints.
When a terrace is being re-tiled, we apply a flexible two-component cementitious membrane over the prepared slab, turned up the walls by several inches and dressed into the drain outlet. Tiles are then fixed with a suitable adhesive on top. Because the membrane is protected by tiles, it is shielded from sun and abrasion and can perform for a long time.
For balconies and lighter-use terraces, high-build acrylic elastomeric coatings offer a cost-effective, walkable waterproof layer. Light-coloured versions reflect sunlight, which helps on terraces directly above bedrooms that become uncomfortably hot in June and July.
Where tiles are sound but grout has failed, we can rake out old grout, refill with polymer or epoxy grout and treat the surface with a penetrating water repellent. This option is suitable only where leaks are minor and the waterproofing beneath has not completely failed, and we assess this during inspection.
We fit or repair drain outlets with proper collars so the membrane runs into the pipe rather than stopping short of it. At door thresholds we create an upstand or step and seal the junction under the door frame. These small details are responsible for a large share of terrace leaks in Pakistani homes.
If water ponds on the terrace, we can lay a sloped screed towards the outlet before waterproofing, so rain drains away quickly rather than sitting on the surface through the monsoon.
Check slope, drains, tiles, joints and the ceiling below
Tiled or exposed system and scope explained clearly
Clean, grind, remove loose tiles or plaster and open cracks
Fill cracks, form coves at wall junctions, fix outlets
Multiple coats with reinforcement at weak points
Curing, top coat or tiling and drainage check
Balconies in apartments and houses have their own challenges. Cantilevered balcony slabs are thin and exposed on three sides, so rainwater can reach them from above and below. Water often seeps along the railing anchors and down into the slab edge, rusting the steel and cracking the concrete at the front edge, a problem known as spalling. Balconies used for washing machines or plants receive water almost every day, not only during the rain. We treat the balcony surface, seal railing bases, repair spalled edges with polymer-modified mortar and add a drip edge so water falls clear of the slab underside.
Every terrace is different, so we provide a written quote only after inspecting the site. The cost depends on:
Call or WhatsApp 0321-4156036 to arrange a terrace or balcony inspection. You can also send photos of the terrace and the ceiling below on WhatsApp.
The ideal time is in the dry months before the monsoon, roughly from March to early June, or after the rains from October to December. The slab needs to be dry enough for most membranes to bond, and fair weather allows proper curing. Waiting until the ceiling is dripping in August means working around rain and wet surfaces. If you notice ceiling stains during this monsoon, book an inspection now and plan the work for the next dry spell.
Terrace leaks often link with other problems. See roof waterproofing, terrace heatproofing, wall and ceiling waterproofing, crack filling and repair and leakage and seepage treatment. For damaged surfaces, read about roof surface repair.
Commercial plazas and apartment buildings in Lahore, Islamabad, Rawalpindi and Peshawar often use roof-top terraces for water tanks, solar panels, generator rooms and sometimes rooftop cafes or gathering areas. These terraces carry heavy equipment, foot traffic from maintenance staff and frequent water spills from tanks and air-conditioning units. Leaks here affect top-floor offices, flats and shops, and finding the source can be difficult because equipment covers much of the slab. We plan the work around equipment bases, seal around solar mounting frames and tank stands, and choose systems that tolerate both foot traffic and constant exposure to sun. Work can be phased so that building services stay running.
Many terraces in Pakistan leak again within a year or two because of avoidable mistakes. Applying a coating over dusty, wet or loose surfaces prevents it from bonding. Stopping the membrane at the floor instead of turning it up the parapet leaves the most vulnerable joint unprotected. Laying new tiles directly over old cracked tiles without any membrane simply hides the problem. Pouring a thick layer of mud phuska or brick bats without proper slope adds weight while still allowing ponding. Using a single thin coat to save material leaves pinholes. Our process is designed specifically to avoid these shortcuts so that the treatment lasts through many monsoon seasons.
Every Wellcool customer receives the same complete service — from the first inspection to the final check. No shortcuts, no half-finished work.
Terrace surface and ceiling below checked together
Cleaning, grinding and removal of loose material
Reinforced at cracks, coves and parapet joints
Membrane dressed properly into drains
Door edges protected against water entry
Drainage and finish checked before handover
Your building is our priority. From the first phone call to the final check, our team treats your property as if it were our own. We arrive on time, protect your home while we work, and leave the site clean.
We follow one simple rule: prepare properly, apply correctly, check thoroughly. That is how results last for years — not just for one season.
Punjab, KPK & Islamabad
Site survey & quote
Tested systems
Clear timelines
Sometimes. If the tiles are firmly bonded and leaks are minor, grout replacement and a penetrating sealer may help. However, if water is already trapped under the tiles, tiles are hollow or leaks are severe, the reliable repair is to remove tiles, waterproof the slab with a membrane and re-tile. We assess this honestly during inspection.
Water that gets under tiles or into the screed can travel across the slab before finding a crack to drip through. That is why a ceiling stain may appear several feet away from the actual entry point. Our inspection traces the path by checking slope, joints, outlets and the ceiling pattern together.
For exposed terraces, a UV-stable polyurethane membrane is a strong choice because it is seamless and flexible in extreme heat. Under tiles, a flexible cementitious membrane works well. Acrylic elastomeric coatings suit lighter-use balconies. The right choice depends on use, finish and budget.
Yes, once the system has cured. Walkable top coats and tiled finishes are designed for regular foot traffic. We will tell you how long to wait before light use and before placing furniture or plant pots back on the surface.
Some light-coloured and reflective coatings reduce surface heat, which helps the room below. If heat is a major concern, we can combine waterproofing with terrace heatproofing so you get both leak protection and lower temperatures.
We build or repair an upstand at the threshold, slope the floor away from the door and carry the membrane up and under the frame junction. A sealant is applied where the frame meets the masonry. This stops wind-driven rain and pooled water from flowing indoors.
Yes. We remove loose concrete, clean and treat rusted reinforcement with an anti-corrosion primer, rebuild the edge with polymer-modified repair mortar and then waterproof the balcony so water no longer reaches the steel.
Complete waterproofing for every part of your building, from roof to foundation.
Seamless protection for flat RCC roofs
Stop leaks under tiles and floors
Keep below-ground floors dry
Safe lining for overhead tanks
Stop water loss from pools
End damp walls and ceiling stains
Find and fix hidden leaks
Seal structural and surface cracks
Tell us your city and the problem, send a few photos on WhatsApp, and our team will arrange a site visit. No obligation, no hidden cost.
Call, WhatsApp or fill in our quote form for a free estimate.