Materials for drainage, waterproofing and civil engineering
Roof Garden, Landscape & Parking Deck Drainage
Roof Garden, Landscape & Parking Deck Drainage
HDPE dimpled drainage boards for underground garage roof decks, with coordinated materials for roof gardens and landscaped platforms.
Discuss Your Application
Healthier, Greener Cities
Reliable Systems for Demanding Sites
From Design to Realization
Application scenarios
Design Around the Use of the Deck
Planted roof areas
Support healthy plant growth while managing excess water and maintaining long-term performance.
Landscaped podiums
Combine drainage, water storage and paving to create functional and attractive outdoor spaces.
Parking & paved zones
Provide drainage beneath pavements while protecting the waterproofing system.
System build-up
Typical Roof Garden Build-up
- Planting / Growing medium
- Filter geotextile
- Drainage & water-storage layer
- Protective layer
- Waterproofing membrane
- Structural slab
A Balanced System for Greener Spaces
Each layer works together to manage water, support plant growth and protect the structure for long-term performance.
Learn About MaterialsIllustrative planting-zone assembly. Parking zones require a project-specific load-bearing build-up.
Related materials
Match the Material to the Layer
HDPE Water Storage Drainage Board
Provides drainage and water storage within the build-up.
HDPE Composite Siphon Drainage Board
For projects using siphon drainage systems. Not a universal substitute.
Nonwoven Geotextile
Filters soil and prevents fines from clogging the drainage layer.
HDPE Geomembrane
Barrier material selection follows the roof or deck design.
Design considerations
Key Selection Factors
Loads & surface use
- Pedestrian, landscape or vehicle loading
- Pavement type and thickness
- Long-term durability
Water movement
- Drainage capacity and flow path
- Water storage requirements
- Outlet locations and spacing
- Integration with siphon systems where applicable
Root and membrane protection
- Root resistance requirements
- Use of protective layers
- Material compatibility
- Long-term system performance
Installation details
Coordinate Details Before Installation
Outlets & edges
Detail connections at outlets, edges and upstands.
Layer continuity
Ensure continuous coverage and correct overlaps between layers.
Construction protection
Protect installed layers during subsequent construction works.
Frequently asked questions
Can the same build-up be used under parking areas?
No. Loading, pavement layers and drainage details must be reviewed for the specific zone.
HDPE dimpled drainage board
Underground Garage Roof Deck Drainage
Our HDPE dimpled drainage board is used on underground garage roof decks. The photographs below show the supplied product laid horizontally across the deck.
Drainage Board Installation
The dimpled sheets form the drainage layer on the garage roof deck. Confirm the complete layer arrangement and outlet details for the project.
View the Drainage Board →
Continuous Deck Coverage
Plan sheet joints and connections for the specific garage roof deck. Use the selected product with the project’s specified adjacent layers.
Discuss Your Project →Landscape protection
Tree Wrapping in Practice
Green nonwoven tree wrap is supplied for tree-trunk wrapping and landscape protection applications.
Completed Landscape Protection
Client-supplied photograph showing wrapped tree trunks and protected planting areas.
Explore Tree Wrap →
Green Nonwoven Tree Wrap
Discuss the roll width, length and quantity needed for your planting project.
View Product Details →Get in touch
Share Your Roof or Deck Requirements
Discuss suitable material solutions for your project with our team.
Your details will be used to respond to your inquiry.