Pedestals & Decking
The Components
Geotextiles
- With sand or aggregate bedding materials, geotextile will be needed to contain them and keep them from migrating into deck drains.
Protection board
- Most waterproofing systems require a protection board over them to prevent damage to the waterproofing from paving units and to reduce thermal stresses from temperature changes.
Insulation
- If a pedestrian plaza deck covers an inhabited space, insulation may be required. Insulation typically consists of foam or fiber boards placed over the waterproofing.
Drainage mats
- Drainage mats are generally placed under bedding sand and over waterproof membranes to accelerate drainage of water from the sand. Drainage mats are typically ¼” to ⅜” thick.
