With tropical climate and monsoons (July to September) throughout the year, Karachi, the biggest city of Pakistan, experiences hot summers and mild winters: Spring and autumn are short-term seasons.
To reduce the effects of roof sagging due to moisture, a property owner can use metal flashing, shingles and other roofing material, improve gutter system and ventilation, and more. Other methods include:
- Angled braces
- Rain chains and turnbuckles
If you want a long-term and cost-effective solution, opt for ROOF WATER PROOFING SERVICES.
Water-Proofing Rooftops – Why is it Necessary?
A roof or terrace is an essential part (top cover) of your home, protecting the internal structure from extreme weather conditions and water ingress. There are several reasons that contribute to roof damage. Some of them are:
- Heat damage
- Cracks and ruptures
- Roof installations
To avoid any issues, the entire area needs a water-resistant coating: Increase the roof’s lifespan, maintain visual appeal, and prevent health deterioration of your loved ones by hiring a reliable firm like Waterproofing.pk.
Types of Roof Waterproofing Services in Karachi
Coatings are necessary for reducing the impact of the Sun’s rays. There are two types of liquid coatings available in Karachi, Pakistan:
- Liquid Roof Membranes
- Liquid Roof Coatings
Liquid Roof Membranes
Liquid membranes are monothilic, liquid-based coating applicable on different rooftops. It has a thicker application rate than liquid coatings, forming a durable protective barrier against ultra-violet radiation and excessive heat.
It is a cost-effective solution, especially for roof repair projects and renovations. Moreover, it can be applied on different substrates, including asphalt, concrete, and bitumen. Membranes are seamless and flat; they are used to fill in gaps, cracks, and voids in substrates.
Liquid Roof Coatings
This covering forms a protective layer against rain, snow, and Sun’s rays. With a much thinner application rate, liquid coatings are not guaranteed to ensure water intrusion. If water ponding takes place, the coating flakes up and exposes the surface underneath.
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Types of Coatings
To opt for the right type of coating is essential. If you are living in Karachi, it’s better to consult an expert before purchasing the product. Below are some essential types of liquid coatings available in the metropolis.
- Polyurethane Coatings
Known for their exceptional strength, polyurethane coatings have a wide range of commercial and residential applications. They can form an adhesive coat over different substances, including smooth BUR, modified bitumen, concrete, and more. These coatings can cure within 24 hours.
This coating is flexible and soft to touch: They hold up well against the effects of water ponding. In addition, it is impact-resistant, preferable for high-traffic areas. There are two types of polyurethane coatings:
Aliphatic polyurethane is used as a top coat whereas aromatic polyurethane is used as a base coat.
- Acrylic Coatings
Acrylic roof coatings are durable and UV-resistant: They are optimal for low-temperature environments. These coverings can be used on different surfaces:
- Modified bitumen
This coating type is optimum for:
- Businesses or entrepreneurs with limited-budget
- Metal roofs with minimal rust
- Cementitious Coatings
Concrete is a durable material used for different types of constructions, including bridges, dams, pools, and dwellings. However, it is porous and permeable, meaning water can penetrate through and cause loss in the long run. Cementitious waterproofing is the best solution; it provides positive and negative side waterproofing protection on masonry and concrete surfaces.
It can be applied on the following:
- Parking Structures & Lots
Cementitious coating is monothilic, chemical and abrasion-resistant, and offer excellent bonding capability.
- Silicone Coatings
To handle extreme temperatures and weather conditions, silicone coatings are the best choice. Silicone creates a seamless surface with water-resistant and anti-water-pooling properties. It does not rupture or wither away. In addition, it resists UV rays, stains, mold, and mildew. Silicone coatings can be applied on concrete, wood, mineral cap sheet, and metal roofs. It is an environmentally-safe coating, containing low VOCs (volatile organic compounds) and high solids content.
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- Bitumen Coatings
Bituminous coatings can be formulated from different combinations of dispersing agents, fillers, or solvents. Different types of thicknesses can be produced: Thin-film (3-mil) coatings and Thick-film (10-mil) coatings.
Before applying the coat, there are certain conditions that should be met.
- Sandblasting on corroded surfaces
- Removal of moisture, grease, salts, loose rust, and other particles
- Application of primer on rusty surfaces
Keeping away water seepage from roofs is essential in cities like Karachi where monsoons lasts for more than three months. To opt for a specific coating, ensure that the surface adheres to the chemical. For example, liquid bituminous membrane is excellent for concrete foundations.
If you want to purchase waterproofing chemicals, utilize waterproofing services, or inquire about the process, contact Waterproofing.pk, the best company for Roof Waterproofing in Karachi.