Oldcastle Building Products Canada, Inc.

Les Materiaux De'construction Oldcastle Canada Inc.

Marc-André Lacas

Bertin Castonguay

Marcel Thomassen

Robert Daoust

Robert Declos

Sébastien Bouchard

Joël Rémillard

A concrete block includes a dry cast concrete body having opposite first and second sides, opposite first and second end faces extending between the first and second sides, and opposite first and second bearing faces extending between the first and second sides and the first and second end faces. Each of the first and second bearing faces defines an inset region sized to receive a key that will also fit into the inset region of a like block stacked thereon. The body has at least a pair of rod-receiving apertures extending completely therethrough between the first and second sides to permit attachment to a like block through the first and second sides with a rod extending through each of the apertures. The block can be tapered to form curved walls.

Concrete building block and methods

A concrete block system is provided and allows for the use of a single type of non-integral connector to perform different functions in a mortarless structure, the system comprising a plurality of structural concrete blocks and a plurality of veneer units. The same connector can be used to connect veneer units to structural blocks, to retain the veneer units in different orientations; to create near vertical installations or a setback between stacked rows of structural blocks. In addition, the system provides a single structural block, which can be used for both straight portions or corners of a same structure. The structural block can also be used to create double-sided walls, with opposite lateral walls being configured to received/retain veneer units thereon.

Concrete block system, method and connector

Disclosed is an economical and effective way of producing a modular retaining wall, using only blocks which in and of themselves are of insufficient thickness to function as retaining wall blocks. The modular wall includes backer blocks and facing blocks which are connected by connectors in a back to back, spaced apart arrangement, thereby forming a hollow retaining wall. The hollow wall can be filled with loose filler material to increase the mass and retaining capacity of the wall. Further disclosed are wall components and a wall kit for a modular retaining wall. A double sided decorative wall is also disclosed. The modular wall system allows for the construction of retaining walls and freestanding, double sided, decorative walls forming both straight and curved walls.

Retaining wall

A covering unit for use in combination with similar units for covering a surface with a natural random look, the unit having an hexagonal body comprising first, second and third pairs of opposed and parallel sides. Each side has a central point of angular symmetry. The second and third pairs are similar to each other while the first pair is different from the others. The sides of the second and third pairs are provided with at least one split deviation along their length arranged so that each side of the second pair is a rotational image of the sides of the third pair, whereby in use in combination with other covering units: each side is matingly engageable with the sides of an equivalent pair of a neighboring unit; and the unit has a central point of angular symmetry and is matingly engageable with a plurality of neighboring unit.

Covering unit

An apparatus for molding dry cast products having a textured side surface is disclosed. The apparatus comprises an open compartment for receiving a dry concrete mixture and a plurality of walls laterally enclosing the compartment. At least one of the walls has a multilevel surface with a plurality of sections in an overhanging relationship with each other and transitional curvilinear steps bridging adjacent one of the sections to impart a textured side surface resembling a natural rockface and allowing stripping of the dry cast products from an open bottom side of the compartment.

Growing community of inventors

Laval, Canada

Marc-André Lacas