Tremco Retention Squares

Tremco Retention Squares are high-density polyethylene reservoir boards designed for use in GreenScape and amenity deck applications where a deep-well type water storage system is desired.


  • When additional water storage capacity is required, the board is used as an underlying reservoir holding 0.27 gal/sq.ft. when filled with mineral aggregate
  • The special underside channel profile provides high volume multi-directional drainage
  • Used in conjunction with Tremco 7611+ Moisture Retention Mat