A ventilation panel for a soil gas barrier system includes: an insulating foam body having first and second opposing faces and a plurality of grooves to define, in cross-section, an interconnected plurality of ventilation channels having walls that extend into the ventilation panel from the second face toward the first face; and a film of substantially gas-impervious material attached to at least one of the first face and the second face.

A method of assembling resilient floorboards is disclosed that includes the step of bending an edge of a floorboard during the assembling. The bending reduces the force required for connection of the edge to another edge of a juxtaposed floorboard. The floorboards may be provided with a mechanical locking system for vertical and horizontal locking of two adjacent floorboards.

A method of assembling resilient floorboards is disclosed that includes the step of bending an edge of a floorboard during the assembling. The bending reduces the force required for connection of the edge to another edge of a juxtaposed floorboard. The floorboards may be provided with a mechanical locking system for vertical and horizontal locking of two adjacent floorboards.

A method of assembling resilient floorboards is disclosed that includes the step of bending an edge of a floorboard during the assembling. The bending reduces the force required for connection of the edge to another edge of a juxtaposed floorboard. The floorboards may be provided with a mechanical locking system for vertical and horizontal locking of two adjacent floorboards.

A method of assembling resilient floorboards is disclosed that includes the step of bending an edge of a floorboard during the assembling. The bending reduces the force required for connection of the edge to another edge of a juxtaposed floorboard. The floorboards may be provided with a mechanical locking system for vertical and horizontal locking of two adjacent floorboards.

An underlay mat (10) for floor coverings, includes a polyurethane layer (14), a self-adhesive film (20) on the topside of the polyurethane layer (14) and which includes a carrier film (12), a layer of adhesive (22) applied to carrier film (12), and a mesh structure (24) made of fibers which is embedded in the adhesive layer (22), and a removable protective film (26) on the topside of self-adhesive film (20).

An underlay mat (10) for floor coverings, includes a polyurethane layer (14), a self-adhesive film (20) on the topside of the polyurethane layer (14) and which includes a carrier film (12), a layer of adhesive (22) applied to carrier film (12), and a mesh structure (24) made of fibers which is embedded in the adhesive layer (22), and a removable protective film (26) on the topside of self-adhesive film (20).

A flooring system that folds up to form a large crate. This crate can be used to hold constructions materials for the building to be built on the floor. The crate is designed to be placed on a foundation. The crate is placed on top of the foundation in the center, perpendicular to beams that make up part of the foundation. Once the base is in place on the beams the crate is unfolded and a flat floor is achieved. All of the pieces of the crate have the flanges that fit onto the beams. They can then be fastened to the beams to secure them in place. The system uses a unique hinge and locking system. At the edges of the sides of each floor panel of the crate are torque tubes that support a cam link and a cam arm that are used to fold and unfold the floor.

A flooring system that folds up to form a large crate. This crate can be used to hold constructions materials for the building to be built on the floor. The crate is designed to be placed on a foundation. The crate is placed on top of the foundation in the center, perpendicular to beams that make up part of the foundation. Once the base is in place on the beams the crate is unfolded and a flat floor is achieved. All of the pieces of the crate have the flanges that fit onto the beams. They can then be fastened to the beams to secure them in place. The system uses a unique hinge and locking system. At the edges of the sides of each floor panel of the crate are torque tubes that support a cam link and a cam arm that are used to fold and unfold the floor.

Floor panels which are provided with a mechanical locking system including an extruded flexible tongue in a sidewardly open groove which during a vertical folding motion is bent horizontally. A tongue adapted for being received in a sidewardly open groove of a floor panel, wherein the tongue, which is an elongated extruded section, when received in the groove is bendable in a plane substantially parallel with a front face of the floor panel, such that the tongue is at least partially resiliently displaceable inside said sidewardly open groove in said plane during locking of the floor panel with another floor panel and wherein a vertical protrusion, serving as a friction connection between the tongue and the groove, is arranged at an upper or lower part of the tongue, wherein a total width of tongue varies in a longitudinal direction of the tongue.