Innovation built on experience



DCT SMTG XPS rigid board is designed to be used as thermal insulation in walls, floors, and roofing applications. DCT XPS insulation is an extruded polystyrene (XPS) blue board with a closed cell structure which means it won’t absorb moisture.

The DCT  SMTG XPS boards are designed with a tongue and grooved edge to ensure the boards lock together to prevent moisture passing through the joints where the tongue edge is up and the groove edge is facing down.

DCT SMTG XPS insulation offers excellent long term R-values that per unit thickness are superior to most alternative common insulation products.


  • Exterior walls over studs or non-insulating sheathing like OSB or plywood interior walls – concrete blocks
  • Ceilings – cathedral, vaulted or flat ceilings, finished attic
  • Exterior foundation walls
  • Interior foundation walls
  • Crawl space


  • Tongue and grooved edge
  • High strength-to-weight ratio
  • Long term retained R-Value
  • Very low water absorption
  • Low susceptibility to rot, mould or fungal growth
  • Clean, odourless and free from irritating dust

For more information about our DCT SMTG please visit:

DCT GA 300