Concrete form system

A form for pouring concrete which comprises;

• (a) two opposed walls with a cavity between them to receive the concrete, one wall being made of a plurality of plywood or metal panels having vertical edge-to-edge joins between them and the other wall being made of a plurality of foam panels having vertical edge-to-edge joins between them;
• (b) said foam panels and said plywood or metal panels being so assembled that the vertical joins between the plywood or metal panels and the vertical joins between the foam panels are opposite one another;
• (c) a plurality of ties, each extending between the plywood or metal panels and the foam panels at a place where each has a vertical join;
• (d) means attaching each tie firmly to at least one plywood or metal panel;
• and
• (e) tie retaining means for retaining the tie against at least one foam panel adjacent its said vertical join with a second foam panel so that the outward pressure from wet concrete within the cavity is transferred by said tie retaining means to the tie and by the tie to the plywood or metal panel to which the tie is attached,
• (f) said foam panels being supplied with slots adjacent one vertical edge,
• (g) said tie retaining means being positioned in said slots to retain the ties in a rigid relationship with the foam panel,
• (h) said tie retaining means having a blade portion which extends through a said slot and into the cavity, and a head which lies against the surface of the foam panel remote from the cavity, and a first tie retaining clip.