Categories Home improvement

Considerations to Make for Roof Waterproofing | General Waterproofing & Service

A dependable roof waterproofing service in Singapore may help you have a high-quality, safe roof, whether your roof is flat or sloping. Instead of replacing the entire roof, you may add a waterproof coating to keep water out of the structure.

Water can pool on your roof and leak through fractures during heavy rains. It can cause damage to your property. Mould and mildew may form on your walls. The wooden components of your property may also decay. Waterproofing your roof will protect your property from moisture damage.

8 Considerations to Make Before Choosing Roof Waterproofing

There are several types of roof waterproofing for various Singapore property types. However, you need to determine the best type for your roof application. Here are several considerations before selecting the best waterproofing membrane for your property.

#1 Existing Roof Surface Compatibility

Paying attention to the current coating of your roof can help minimise costly damage. Consult a waterproofing expert if you use roof tiles on your property.

#2 UV Damage

Unless there are trees above your structure, the waterproofing membrane must be UV stable or resistant. Otherwise, it would lose its vigour when the sun beats down on it.

#3 Stretchability/Expansion

The waterproofing membrane must be able to stretch to allow movement and conceal gaps that may form in the concrete over time. If the material has a 150% extension rate, it may extend up to 1.5 times beyond its native form.

#4 Absorbency

Effective waterproofing for concrete and roof tiles might retain water within your structure if moisture unintentionally leaks through. Look for a barrier that inhibits water from passing while allowing vapour to travel through.

#5 Durability

Even if your material has a high elongation rate, it might tear when subjected to significant force. Your concrete and roof waterproofing membrane should be strong enough to resist strong winds and rain.

#6 Abrasion Resistance

The material must also survive wear and tear from daily use. You can determine its abrasion resistance when heavy objects land on the material during construction. Leaks will enter your property if abrasive things rupture the membrane.

#7 Endurance

The membrane should tolerate toxins from surrounding industrial locations and falling debris. If the membrane is not chemically inert, it may degrade when exposed to soil and construction materials.

#8 Conformity

The waterproofing membrane for roof tiles must be flexible enough to fit around your irregularly shaped roof. A liquid membrane would be ideal in this situation because it can adopt any shape. On the other hand, a sheet membrane can fold and wrinkle, causing gaps between the membrane and the underlay.

Materials Used for Waterproofing

There are two common types of waterproofing you can opt for: bituminous and liquid polyurethane. Roof waterproofing manufacturers in Singapore and abroad employ various materials for bituminous membrane and liquid polyurethane waterproofing.

#1 Bituminous Membrane

Contractors commonly use bituminous membrane sheets for concrete roof waterproofing treatment. It is a combination of sticky organic liquids and asphalts. These sheets are securely sealed and packed in a factory before arriving on-site in roll form. Consider fire protection and safety during installation since it requires a torch for application. The membrane comes in three layers to ensure the seal on your roof.

  • The top layer protects the membrane from damage. Most roof waterproofing contractors in Singapore and abroad use sand, slate, talc, polyethene or aluminium.
  • A polymer-bitumen compound serves as the next layer for concrete roof waterproofing to prevent moisture from further seeping. It is common to see this layer made of atactic polypropylene (APP) or styrene-butadiene-styrene (SBS).
  • The last layer, a bituminous layer, serves as reinforcement and is usually made from polyester and fibreglass. This layer aims to prevent damage from shock, fatigue and punctures.


#2 Polyurethane Liquid

Polyurethane liquid membrane waterproofs flat roofings. It is a valuable material to use in areas with inclement weather. The type of polymer contractors use determines its endurance. However, it can typically last a few decades. The components of this concrete roof waterproofing material depend on the number of layers you want on your property.

  • Water-based liquid membranes are environmentally friendly and energy-efficient. It has impressive UV stability and is simple to install. It is the best material if you are in a mild or warm climate.
  • One-component polyurethane liquid membranes are flexible at low temperatures. It can cure in various situations. It also helps expedite the installation procedure.
  • The perfect substantial concrete roof waterproofing material is two-component polyurethane liquid membranes. It dries and heals quickly, allowing you to continue like usual.

3 Considerations when Choosing a Contractor

The majority of houses and facilities have waterproofing materials just in the foundation. If you perform a comprehensive check of your property and discover symptoms of the damage, it is essential to contact a waterproofing professional. The following are three considerations when choosing a roof waterproofing contractor in Singapore.

#1 Material Use

Waterproofing contractors recognise that different situations necessitate individualised waterproofing solutions. If you live in a humid city, a waterproofing contractor should provide a solution to tolerate moist conditions. Most essential, a reputable contractor will utilise concrete and roof waterproofing materials that satisfy regulations.

#2 Specialisation

Consider whether a possible contractor can do concrete and roof waterproofing successfully. It is even more crucial for commercial establishments. A home waterproofing contractor will solely be concerned with what is going on in the domestic sector. They may be unaware of new commercial and industrial waterproofing solutions.

#3 Meticulous Facility Inspection

Immediately contact a waterproofing expert when you smell mould or observe wet areas within your property. Also, prepare yourself for costly wall leakage repair procedures. A waterproofing contractor would often locate the problem spot and fix it to avoid further leaks. If a contractor inspects the entire site for other issue areas, they are the best choice for your needs.

Only Work with a Trusted Contractor

General Waterproofing Services is a top provider of roof repair and waterproofing services in Singapore. The organisation has a team that pays close attention to each project and takes it seriously. Their crew gives special attention to and addresses each project seriously. Contact them for consultations and inquiries. You can also visit their website for more information.