Cavity Closer Apparatus

The invention relates to a cavity closer apparatus in strip form for use with insulated concrete form (ICF) walls. The apparatus comprises a body member 10 including a central portion (62 figure 3 and 72 figure 4), for bridging the cavity between inner and outer wall leaves, and has respective front and rear projections 20 and 21 for engaging the exposed ends of the leaves. The body member 10 incorporates means 26 for lockable engagement of fixing cleats (69 figure 3) for a window or door frame. The central portion of the body member may include a housing defining one or more voids containing insulation material and the fixing cleats may comprise clips (69 figure 3) formed from a flat strip of resilient material adapted at the forward end portion for attachment to a door or window frame element and at the rearward end portion for lockable engagement with the body member 10. The apparatus may also include a spacer member 11 in strip form, the body 10 and spacer member 11 including means 30 and 37 for mutual engagement at a desired position of the spacer member 11 relative to the depth of the body member 10. The spacer member 11 preferably comprises a means 36 for lockable engagement of fixing cleats for the window or door frame.