A stay-in-place concrete formwork system allows stucco to be applied directly to the formwork, avoiding the need to provide a further surface treatment of the wall prior to applying stucco. Apertures are provided on an exterior facing wall of the formwork panel to receive and embed stucco therein. The panel may also be formed with outward stucco-engaging projections. Other features include using rigid insulation to brace the stucco and keep concrete from the apertures, a sealing joint element, extendible panels for use in curved formwork, rainscreen features and an alligator connector panel for adjustable lengths of formwork faces.

A tie for a concrete formwork comprises: a tie anchor configured to be embedded in a block of insulating material, the tie anchor having a first connecting feature accessible from a concrete-facing surface of the block; and a tie member having a second connecting feature configured to connect to the first connecting feature of the tie anchor. The tie member has at least one connector for connecting to an abutting tie member.

A concrete form includes a first sidewall and a second sidewall positioned in parallel and spaced relation to each other, where the first sidewall has a first passage extending therethrough, with a first insert received in the first passage of the first sidewall. The form also includes a first cross tie having opposed first and second ends, where the first sidewall is removably secured to the first end of the first cross tie and the second sidewall is secured to the second end of the first cross tie. A first fastener extends through the first passage and engages the first insert and the first end of the first cross tie to removably secure the first sidewall to the first cross tie. The second sidewall may be removably or non-removably secured to the first cross tie.

An insulating concrete form system uses a stacked arrangement of foam panels to receive pourable concrete to construct a concrete wall of a building structure. Webs located in the panels hold the panels in parallel spaced relation. The webs have laterally extending ties. The ties have one or more projecting members having arms extending into grooves adapted to receive rebar. Outwardly extending truss member are used to fasten multiple webs during shipping. Couplings releasably connect the ties to end portions of the web and allow the ties to be moved along the length of the end portions as desired.

A tie for a concrete formwork comprises: a tie anchor configured to be embedded in a block of insulating material, the tie anchor having a first connecting feature accessible from a concrete-facing surface of the block; and a tie member having a second connecting feature configured to connect to the first connecting feature of the tie anchor. The tie member has at least one connector for connecting to an abutting tie member.

Plastic cross ties constructed of a plastic pipe with two separate connectors attached to both ends act as a unit to position opposing masonry shells as part of a stay-in-place concrete form system. A three part cross tie assembly constructed of a pipe and concrete from connectors are snapped together with zip rods eliminating the need for screwing, nailing or gluing.

A panel (6) is disclosed for use in construction. The panel (6) comprises opposing surfaces (6A, 6B) that extend between first and second opposite ends (7A, 7B). The panel (6) also comprises a plurality of parallel (e.g. sawtooth) ridges (7). The ridges (7) are provided on at least one of the opposing surfaces (6A and/or 6B). The ridges (7) extend along and adjacent to a first of the opposite ends (7A or 7B) of the panel for at least a part length thereof. The ridges (7) are arranged to engage with and move past corresponding ridges of an adjacent panel (6) when the panels move relative to each other in opposite directions. The ridges (7) are further arranged so as to interfere with the ridges of the adjacent panel to resist relative movement in a reverse of the opposite direction.

A collapsible formwork element, the element including: a pair of opposing side wall panels; and at least one connector member extending between the side wall panels, wherein the formwork element is movable between an expanded configuration, wherein the opposing panels are spaced apart, and a collapsed configuration, wherein the opposing panels are relatively closer together.

The present invention provides a system 10 for construction of formwork where a settable compound is pourable into a cavity in the formwork and retained by the formwork to set to form a completed structure. The formwork comprises structural panels 12, 14 connected by adjustable connectors 34 for varying the spacing between the panels.

Disclosed is an economical and effective way of producing a double sided wall using facing panels having a face surface and a back surface with a retaining structure. The facing panels are stacked in a back-to-back arrangement into a pair of first and second wall components connected by separate articulated connectors. The articulated connectors each have a first base connector that fits into a respective retaining groove in the first wall component and a second base connector that fits into a respective retaining groove of the second wall component. The first and second base connectors are connected to each other by a link that forms a first pivot joint at the first base connector and a second pivot joint at the second base connector.