Dimple board, also known as drainage board or dimple mat, is a type of plastic sheeting with a pattern of raised dimples or studs on one side. It’s commonly used in construction and landscaping projects for its drainage and waterproofing properties. Here’s how it’s typically used:
1. **Foundation Waterproofing:** Dimple board is often installed on the exterior of foundation walls to provide a protective barrier against moisture infiltration. The dimples create an air gap between the foundation wall and the backfill, allowing water to drain down and away from the wall instead of seeping into it.
2. **Basement Waterproofing:** In below-grade applications, dimple board can be installed on basement walls before backfilling to prevent water penetration and dampness. By creating a drainage path, it helps keep the basement interior dry and reduces the risk of mold and mildew growth.
3. **Green Roof and Plaza Deck Construction:** Dimple board is used as a drainage layer in green roof and plaza deck assemblies. It provides a separation layer between the growing medium and the waterproofing membrane, allowing excess water to drain away efficiently and promoting healthy plant growth.
4. **Under Slab Drainage:** In slab-on-grade construction, dimple board may be placed beneath the concrete slab to provide drainage and moisture management. This helps prevent moisture-related issues such as efflorescence and mold growth in the finished floor.
5. **Landscaping:** Dimple board can also be used in landscaping applications to improve drainage in retaining walls, planter boxes, and other hardscape features. It helps prevent water pressure buildup behind the structure, reducing the risk of damage and soil erosion.
Overall, dimple board is valued for its versatility, durability, and effectiveness in managing water drainage and moisture control in various construction and landscaping applications.