Igloo unit

How this node works

The plastic dome units rest on the blinding and act as permanent formwork: concrete fills the legs to form little columns, and the slab is cast over the domes. The continuous void beneath is the ventilated space; a barrier under it stops damp and radon.

Key points

• R.C. slab + mesh
• Dome (igloo)
• Air space
• Cast leg (between domes)
• Damp / radon barrier
• Blinding