Do you find old buildings’ musty and damp smell unpleasant and uncomfortable? Not only that, but it can also pose major health risks that you should avoid. Fortunately, there is a solution to this problem – Damp Proof Course (DPC) construction. DPC is typically associated with newly built structures. However, it can also prevent moisture seepage from the ground level from rising through walls. In this article, we will dive into the meaning of DPC construction, its methods, materials and factors to consider.
See also: Everything you need to know about using clamps in construction
What is DPC construction?
It is a damp-proofing measure that safeguards buildings against moisture damage. It involves installing a horizontal barrier at the base of the walls to prevent rising dampness, which can cause structural damage and health risks. This construction tactic effectively enhances the lifespan of the building. It blocks humidity and moisture from harming the foundation.
What are the types of materials used in DPC construction?
| Material | Purpose |
| Bitumen membrane | Bitumen membranes possess remarkable waterproofing properties, which make them a popular choice for DPC. They are created by combining polymers with bitumen, producing a flexible and long-lasting barrier against moisture. |
| Polyethylene sheets | DPC frequently uses polyethylene sheets due to their water and chemical resistance. Available in different thicknesses, they can be installed effortlessly by overlapping and sealing the joints. |
| PVC membrane | PVC (Polyvinyl Chloride) membranes are a common choice because of their high durability and water resistance. These membranes come in rolls and can be easily installed by welding the joints together. |
| Rubberised asphalt | Rubberized asphalt is a blend of rubber and bitumen that enhances its elasticity and waterproofing features. It is frequently utilized for DPC in areas with high levels of moisture. |
| Bentonite clay | Bentonite clay is a natural substance that swells when it comes into contact with water, creating an impermeable barrier. DPC often employs it in areas with low water pressure. |
| Concrete with waterproofing admixtures | Concrete mixed with waterproofing admixtures is another option for. These admixtures reduce the permeability of concrete, making it resistant to water penetration. |
| Metal sheets | In specific cases, metal sheets like lead or copper can be utilized for DPC. They are highly water-resistant and provide exceptional protection against dampness. |
What are the methods of DPC construction?
- Physical DPC involves using a layer of waterproofing material between the layers of masonry or concrete. This method aims to create a barrier against moisture.
- Chemical DPC is achieved by injecting a chemical solution into the walls or floors. This method is commonly used in existing buildings where physical DPC is not present or ineffective.
- Integral DPC involves incorporating a waterproofing additive into the concrete or mortar mix during construction. This additive forms a crystalline structure within the concrete, which blocks the passage of moisture. Integral DPC is commonly used in basements, foundations, and retaining walls.
- Cavity wall DPC is used in buildings with cavity walls. A horizontal barrier is installed at the base of the cavity to prevent moisture from rising. This barrier can be made of materials like slate, engineering bricks, or precast concrete blocks.
- External DPC, on the other hand, is installed on the external surface of the walls or floors to prevent moisture ingress. This method involves applying a waterproofing membrane or coating on the external surface. External DPC is commonly used in areas with high rainfall or where the groundwater level is high.
What factors should be considered during DPC construction?
Material selection
The type of building, soil conditions, and budget are some of the factors that can influence the choice of materials for DPC construction.
Installation process
The installation process must be carried out by skilled professionals who can lay the DPC at the correct height and thickness, ensuring complete coverage and continuity.
Building regulations
It is crucial to adhere to building regulations and codes while constructing DPC, as these regulations ensure its quality and effectiveness.
Cost and maintenance
The cost of can vary depending on the material and size of the building. It is important to consider long-term maintenance costs as well.
Damp Proof Course (DPC) construction can be a reliable way to protect a building’s integrity without incurring significant maintenance costs. However, it is essential to perform periodic upkeep and care to ensure its effectiveness in the long run.
FAQs
Why is DPC construction important?
DPC construction is important because it prevents moisture seepage from the ground level from rising through walls, which can cause structural damage and health risks. It effectively enhances the lifespan of the building and blocks humidity and moisture from harming the foundation.
What is the purpose of DPC in construction?
The purpose of DPC in construction is to create a barrier against moisture, preventing it from seeping through the walls and causing structural damage and health risks.
What are the benefits of DPC construction?
Benefits of DPC construction include the prevention of structural damage, the elimination of health risks associated with dampness, and the enhancement of the lifespan of the building.
When is DPC construction needed?
DPC construction is needed when there is a risk of moisture seepage from the ground level rising through walls, such as in old buildings or in areas with high groundwater levels.
How long does DPC construction take?
The time it takes to complete DPC construction depends on the size of the building and the method of construction used. It typically takes a few days to a few weeks.
Can DPC construction be done on existing buildings?
Yes, DPC construction can be done on existing buildings using chemical DPC. This involves injecting a chemical solution into the walls or floors to create a damp-proof course.
How can you tell if a building has rising dampness?
Signs of rising dampness include a musty and damp smell, peeling paint or wallpaper, damp patches on walls, and visible mould growth.
| Got any questions or point of view on our article? We would love to hear from you. Write to our Editor-in-Chief Jhumur Ghosh at jhumur.ghosh1@housing.com |