Bituminous Membrane Waterproofing Services in Pakistan
Bituminous membranes are the workhorse of roof waterproofing in Pakistan. Thick, reinforced and proven over decades, they protect flat roofs, terraces, basements and foundations from water. Waterproofing Hawks installs modern modified bitumen membranes with proper preparation, detailing and protection, so they deliver the long life they are designed for.
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A bituminous membrane is a waterproof sheet made from bitumen, the dark, sticky material refined from crude oil, that has been modified with polymers and reinforced with a polyester or glass fibre mat. The polymers make the bitumen more flexible and more resistant to heat, while the reinforcement gives the sheet strength so it does not tear when the building moves.
Membranes usually come in rolls one metre wide and around 3 to 5 mm thick. They are bonded to a primed surface by torching, by self-adhesive backing or with cold adhesives, and the sheets are overlapped and sealed at every joint so they form one continuous layer.
Bituminous membrane vs liquid bitumen
Many Pakistani roofs have been treated with hot liquid bitumen poured from a drum. That is very different from a modern bituminous membrane. Poured bitumen has no reinforcement, no controlled thickness and no polymer modification, so it becomes brittle and cracks within a few summers. A factory-made membrane has an even thickness everywhere, stays flexible and can bridge cracks in the slab.
Main types
The two main types are APP modified membranes, which handle high temperatures well, and SBS modified membranes, which stay elastic in the cold. We help you choose the right one for your building and climate. See APP membrane installation and SBS membrane installation.
Where we use bituminous membrane waterproofing and why
Where bituminous membranes work best
- Flat RCC roofs of houses, plazas and offices
- Terraces that will be covered with screed or tiles
- Basement walls and floors, applied on the outside before backfilling
- Foundations and retaining walls
- Large commercial and industrial roofs
- Car park decks under protection layers
Benefits
- Thick and tough, resisting punctures and foot traffic during construction
- Consistent thickness because it is made in a factory
- Crack bridging thanks to polymer modification and reinforcement
- Proven over decades on buildings in hot climates
- Cost-effective for large flat areas
Four simple steps to a dry home
A clear, hassle-free process from your first call to the final handover.
Get in Touch
Call, WhatsApp or fill the form and tell us about the problem.
Free Inspection
Our expert visits your site and finds the exact source of the issue.
Clear Quotation
You receive a detailed quote with materials, timeline and warranty.
Work & Handover
We complete the treatment on time and hand over your warranty.
Surface preparation: the step that decides how long bituminous membrane waterproofing lasts
Every membrane system, however good, depends on the surface it is applied to. Most membrane failures we repair across Pakistan were caused by poor preparation rather than poor material. That is why we treat preparation as the most important part of the job.
Removing what will not hold
Old coatings that are peeling, cracked bitumen, loose screed and wet mud or brick tile layers are removed. Laying a new membrane over failed material only seals water in and leads to blisters and early failure.
Repairing the base
Cracks are opened and filled, honeycombed or weak concrete is repaired with polymer mortar, and any exposed steel is cleaned and treated against rust.
Correcting slopes
Water that stands on a membrane for hours shortens its life. Low spots are filled so water runs freely to the outlets or drains.
Cleaning and drying
Dust, oil and loose particles are removed. Most systems need a dry surface, so we check moisture before applying primer and membrane.
Forming fillets
A rounded fillet is formed where horizontal surfaces meet walls, so the membrane turns the corner smoothly instead of being stretched over a sharp edge.
How we carry out bituminous membrane waterproofing
After preparation, a bitumen primer is applied and allowed to dry. Details such as outlets, corners and pipes are reinforced with strips of membrane. The main sheets are then unrolled from the lowest point upwards, so overlaps shed water rather than catching it. Side laps of around 100 mm and end laps of around 150 mm are fully bonded and pressed down, and the edges are checked for a continuous bead of bitumen. The membrane is turned up parapets and walls and fixed with a termination bar or tucked into a groove. On exposed roofs we finish with a reflective coating or use a mineral-surfaced cap sheet. On terraces and basements the membrane is covered with screed, tiles or protection board.
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Detailing: where membranes succeed or fail
On any membrane project, the open flat areas are the easy part. The details are where water finds its way in, so we treat them before the main membrane goes down.
- Drains and outlets are reinforced with extra membrane or fabric and lapped into the pipe.
- Pipe penetrations receive collars or liquid membrane details.
- Wall upturns run up parapets and walls, usually 150 to 300 mm, and are terminated securely so water cannot get behind them.
- Expansion joints are bridged with flexible strips that allow the structure to move.
- Corners and edges are reinforced because they take the most stress.
- Tank bases, AC stands and solar frames are wrapped and sealed.
Careful detailing takes time, but it is what makes the difference between a membrane that lasts many years and one that leaks after the first monsoon.
Protecting the membrane after installation
A membrane is only as long-lasting as the protection over it. Sun, foot traffic, dropped tools and later construction work are the main threats. Depending on the area, we use one of these protection methods.
Reflective top coats
On exposed roofs, a white or aluminium coating reflects sunlight, keeps the membrane cooler and shields it from UV. It also reduces the heat entering the rooms below.
Mineral cap sheets
Some sheet membranes come with a factory-applied mineral granule surface that protects them from UV without an extra coating.
Protection screed and tiles
On terraces and roofs that are used regularly, a cement screed and tiles over the membrane give a hard-wearing surface while keeping the membrane safe underneath.
Protection boards
Below ground, on basement walls and foundations, boards protect the membrane from damage during backfilling and from sharp stones and roots.
Why homeowners rely on us
Honest advice, quality materials and clean work — on every single project.
Quality Service
We deliver reliable waterproofing solutions for long-lasting protection.
Skilled Team
Our team focuses on effective bituminous membrane waterproofing work and protection.
Quick Response
We respond promptly to your bituminous membrane waterproofing service inquiries.
Fair Pricing
We help customers explore suitable waterproofing options within budgets.
Leak Prevention
Our solutions help reduce water penetration and moisture damage.
Roof Protection
We help protect residential and commercial roofs from leakage.
Testing and quality control
We check the work at each stage rather than only at the end. During application we check overlaps on sheet membranes and measure wet film thickness on liquid membranes, so every area receives the specified amount. Before protection layers are added, we carry out a water test wherever practical by plugging drains and ponding the area for 24 to 48 hours, or by spraying walls and details. Only after the area passes do we add the protective finish. This way any small fault is found and fixed while it is easy to reach, not after tiles or screed have been laid over it.
New construction
The best time to install any membrane is during construction, before finishes are laid. Surfaces are accessible, details can be designed in, and the membrane can be fully protected. We are happy to work with your architect or contractor to plan waterproofing at the design stage, including drainage, upturn heights and protection layers.
Existing buildings
For older buildings, we first assess what is already there. Sometimes a new membrane can be installed over a sound existing surface after cleaning and priming. In other cases, failed layers, wet filling or old bitumen must be removed so the new system bonds properly. We explain the options and the trade-offs in cost, weight and life span, so you can make an informed decision. See old membrane removal and replacement.
What Our Customers Say.
We don't just fix leaks — we build trust. Real reviews from homeowners and businesses across Pakistan, straight from our Google Business profile.
Pakistan has some of the toughest conditions for waterproofing anywhere. Summer roof temperatures in Punjab and Sindh can damage weak materials within a few seasons. The monsoon brings weeks of heavy rain to Lahore, Islamabad, Sialkot and much of the north-east. Karachi and the coast have salty, humid air that attacks exposed materials, while Quetta, Gilgit and the northern hills face cold winters and snow.
A membrane chosen for one of these conditions may not suit another. In very hot areas we prefer UV-stable, reflective or protected systems. In heavy rain areas we focus on thickness, drainage and detailing. In coastal areas we choose salt and UV-resistant top coats. In cold areas we use membranes that stay flexible at low temperatures. We explain these choices during the inspection so you know why a system is recommended for your building.
Common membrane installation mistakes
- Installing on a wet surface, which leads to blisters and loss of bond
- Skipping the primer, so the membrane does not stick properly
- Narrow or poorly sealed overlaps that open after a few months
- No upturn at walls, letting water run behind the membrane
- Leaving bitumen exposed to the sun without protection
- Ignoring drains and pipes, which are where most leaks start
- No water test before covering the membrane
Our process is designed to avoid each of these mistakes, which is why our membranes deliver the life they are designed for.
Membranes need very little care, but a few simple checks extend their life. Clean drains and outlets before the monsoon so water never ponds. Inspect exposed areas after major storms for damage or lifted edges. Refresh reflective top coats every few years. Avoid drilling or fixing anything through the membrane without sealed details, and call us before installing solar panels, dish antennas or new pipes. Small repairs made early are quick and inexpensive. See membrane repair and maintenance.
Bituminous Membrane Waterproofing for homes, businesses and industry
We install bituminous membrane waterproofing for a wide range of clients across Pakistan. For homeowners, we focus on protecting top floor rooms and keeping costs clear and fair. For builders and developers, we work to construction schedules and coordinate with other trades so the membrane is installed and protected at the right stage. For commercial buildings such as plazas, offices, hospitals and schools, we plan work around opening hours and keep disruption low. For factories and warehouses, we cover large areas in phases so operations continue. Whatever the building, every project gets the same careful preparation, detailing and testing.
Our commitment on every membrane project
On every project we arrive on time, explain our findings clearly and give a written quote before starting. We protect your property, keep the site tidy, test our work wherever practical and return after the next rain to make sure everything is dry. If a warranty issue arises, we come back and put it right.
What affects the cost of bituminous membrane waterproofing
- Area, including wall upturns, parapets and details
- Condition of the surface and how much repair is needed
- Removal of old layers such as mud, tiles or failed membranes
- Number of details such as drains, pipes and equipment bases
- Protection layer, such as reflective coat, screed or tiles
- Access, including height and material lifting
After a free inspection we provide a written quote listing each item, the membrane thickness or number of layers and the warranty period.
Why choose Waterproofing Hawks for bituminous membrane waterproofing
- Experience with all major membrane systems, so we recommend what fits rather than one product
- Thorough surface preparation and detailing
- Quality checks and water testing before finishing
- Trained, safety-conscious applicators
- Clean sites and clear communication
- Written quote and warranty
We work across Pakistan, including Lahore, Islamabad, Rawalpindi, Karachi, Faisalabad, Multan and Peshawar. Call or WhatsApp 0321-4156036 or request a free inspection.
Related services you may need
Water and heat problems rarely come alone. These related services are often done together with bituminous membrane waterproofing.
Questions about Bituminous Membrane Waterproofing
Answers to the questions customers ask us most about bituminous membrane waterproofing.
0321-4156036
Is a bituminous membrane better than poured bitumen?
Yes. A modern membrane is reinforced, polymer-modified and of even thickness, so it lasts far longer and bridges cracks. Poured bitumen becomes brittle and cracks quickly.
Can bituminous membranes be left exposed?
Only with UV protection, such as a mineral-surfaced cap sheet or a reflective coating. Bare bitumen degrades in strong sun.
How thick should the membrane be?
For most roofs we use 3 to 4 mm sheets. Heavy-duty or below-ground applications may use thicker or double layers.
Can it be used in basements?
Yes, on the outside of basement walls and under floors, protected by board or brick before backfilling.
Can membranes be installed in winter?
Yes, in most areas, on dry days. In cold northern areas we avoid freezing conditions.
Do membranes add weight to the roof?
Very little. Most membranes are much lighter than traditional mud and tile layers.
Do you provide a written warranty?
Yes. Complete systems come with a written warranty. The period depends on the system and is stated clearly in your quote.
How do I get a quote?
Call or WhatsApp 0321-4156036 or fill in the quote form on this page. We arrange a free inspection, then send a written quote with the scope, materials, timeline and warranty.
Can you work while we live in the building?
Yes. We plan work in stages, keep the site clean and safe, and agree working hours with you so daily life and business can continue with minimal disruption.
Which cities do you work in?
We work across Pakistan, including Lahore, Islamabad, Rawalpindi, Karachi, Faisalabad, Multan, Peshawar and many other cities. Call 0321-4156036 to check your area.
Latest tips & guides
Practical advice to help you protect your home from leakage and heat.