DPC (Damp Proof Course) cream is applied to seal gaps and cracks in a building's foundation to prevent rising damp. Here's how to use it effectively:
Preparation: Drilling the Holes
First, you need to prepare the area for injection. This typically involves:
- Drilling horizontal holes into the mortar joint, approximately 150mm (6 inches) above ground level. A 12mm (½ inch) drill bit is usually recommended. (Reference 1)
- If drilling at this specific height is impossible due to obstacles, alternative methods like flanking works must be implemented to ensure the damp-proof course isn't bridged. (Reference 1)
Injection Process
Once the holes are drilled, the DPC cream is injected:
- Use a low-pressure sprayer or cartridge gun to inject the cream into the boreholes. (Reference 2) This ensures even distribution and prevents over-pressurization.
Important Considerations
- Type of Cream: The specific instructions may vary depending on the brand and type of DPC cream you're using. Always consult the manufacturer's guidelines for detailed instructions.
- Safety: Wear appropriate protective gear, including gloves and eye protection, when handling and applying the DPC cream.
- Drying Time: Allow sufficient drying time before applying any finishing materials or coatings.
