What You Need to Know About Exterior Waterproofing
During the construction of homes and basements, exterior waterproofing measures are put in place to help prevent water from seeping through the walls. These include a tar coating and drainage pipes that are surrounded by gravel next to the foundation footer.
However, these systems are susceptible to wear and tear and can clog over time. Adding or replacing an exterior drain tile system can provide significant benefits, such as protecting the building from structural damage and mold growth. Find out more at Pearland foundation inspection.
Waterproofing membranes
Waterproofing membranes are one of the most important elements for the construction process. They prevent moisture from entering the building and causing damage, extending the lifespan of the structure. They also protect the integrity of the foundation and reduce environmental risks for occupants.
These membranes come in either sheet or liquid form. They are often used in basement walls, tunnels, parking garages and roofs. They can be made from a variety of materials, including bitumen, PVC, and polyurethane.
The most popular type of waterproofing membrane is a sheet-based membrane. This is usually a synthetic rubber material that comes in rolls and is laid on the surface to be waterproofed. It causes water to run off the surface rather than soak into it, which protects against rot and corrosion.
The disadvantage of this method is that it can be difficult to use in existing buildings because accessing the interior foundation wall requires excavation & removal of landscaping. Waterproofing membranes also don’t provide a complete seal against water seepage, so additional measures should be taken to ensure the best results.
Bituminous membranes
Bituminous membranes are a common choice for exterior waterproofing because of their long lifespan and ability to resist water penetration. They can also be enhanced with polymers that decrease drying times and increase resistance to hydraulic pressure.
Some benefits of bituminous membranes include their strong thermal resistance, which means they can withstand temperature fluctuations without melting or softening. They also have self-healing properties, which means small punctures and cracks can repair themselves over time.
Bituminous membranes can be installed using either torch-on or self-adhesive methods. During installation, it is important to follow the manufacturer’s guidelines for surface preparation and cleaning. Proper surface preparation will ensure that the membrane adheres properly and will not be compromised by the surrounding environment. Likewise, end laps should be heat-welded or sealed with compatible roofing mastics as specified by the manufacturer.
Sealants
Sealants are a popular choice for DIY projects because they can be applied in just one step. However, not all sealants are created equal. Some offer greater durability than others, so it’s important to consider the kind of environment you are in before choosing a sealant. For example, if you live in an area with a lot of rain or snow, choose a sealant that is resistant to moisture and UV light.
Waterproofing prevents moisture infiltration, which can corrode metal elements and compromise the structural integrity of a building. It also reduces the risk of mould growth, which can affect occupant health. Exterior waterproofing is ideal for new constructions, high-water tables areas, and historic buildings, and offers a long-term solution. However, the process can be more time-consuming and disruptive than interior methods. It’s also less viable for properties with extensive landscaping, as the excavation and application process can disrupt existing plants. It’s also important to protect nearby plants with plastic sheeting, as sealant overspray can be harmful.
Drainage systems
Drainage systems are a good defence against water intrusion by channelling moisture away from the building. Moisture is a common cause of structural damage and can have different effects on different construction materials. Wood is prone to swelling and warping, concrete and masonry can crack and crumble and metal elements are susceptible to corrosion and rusting. These water-related issues can cause significant deterioration and damage to buildings and require remedial action.
Exterior drainage systems are typically a network of perforated pipes buried in a trench around your home’s foundation. The pipes draw water from soil, melted snow and groundwater and direct it away from your property. This helps reduce the risk of flooding, mold, pest infestation and other water damage concerns. However, they are expensive to install and can often clog with dirt – especially during heavy rains. They also require periodic inspections and maintenance to keep them working properly. They are best installed during home construction but can be retrofitted afterward as well.