A floor panel includes at least two reinforcing layers extending in a direction parallel to a plane defined by the panel to allow one of the at least two reinforcing layers to be situated at a level between 30˜70 percent of a thickness from a top surface of the panel to a highest part of a top surface of the tongue, and/or a bottom surface of the panel to a lowest part of an upper surface of the lower lip.

The present invention relates to a cleaning implement that includes a melamine-formaldehyde foam. The melamine-formaldehyde foam includes from about 0.1 to about 5 weight % of at least one linear polymer with a number average molecular weight M.sub.n in the range from 500 to 10,000 g/mol. Additionally the present invention encompasses processes for making and methods for cleaning hard surfaces with a cleaning implement according to the present invention.

The invention describes the construction of more or less thin house walls, of which the load-bearing panels are stabilized in such a way that they have an insulating middle layer, the middle layer containing carbon, which is brought in as insulation material by means of suitable binders such as cement, geopolymers, resins or foams or glass. In particular, biochar mortars and biochar foams are used, which with the help of fiber reinforcement of the outer stone slices become self-supporting wall and facade elements, which are able to store more carbon than what is produced in the form of CO2, escaping into the atmosphere. Fiber-stabilized stone disks with an insulating middle layer based on pyrogenic or otherwise manufactured or extracted carbon are constructed symmetrically and dimensioned in such a way that they can absorb loads and buckling forces with a comparatively very low weight. For this reason, in addition to its high carbon content, the insulation material should preferably have sufficient tensile stability.

Example embodiments of the described technology provide a prefabricated building panel. The prefabricated building panel may comprise an insulative core having first and second opposing faces. The prefabricated building panel may also comprise a cementitious layer encapsulating the insulative core. The cementitious layer may increase one or more performance characteristics of the panel.

Panels for coupling stone or brick units to a wall structure are disclosed herein. The panels can include an expanded polystyrene foam having a plurality of laterally extending channels formed on one or more of a first and second side of the panel. The channels can aid in adhering a plurality of stone or brick units to the panel. The width of the channels can be less than the width of the stone or brick units such that the stone or brick units are disposed outside the channels when coupled to the panel.

The present disclosure relates to a plaster board comprising a first layer of hardened plaster material comprising a first surface and an opposed second surface, a second layer of hardened plaster material comprising a first surface and an opposed second surface, wherein the first surface of the second layer faces the first surface of the first layer, and a viscoelastic interlayer disposed between the first surface of the first layer and the first surface of the second layer, wherein the interlayer includes a score-and-snap element.

A tile setting structure comprises a floor panel and a plurality of wall panels each attached to either the floor panel or one of the other wall panels with a waterproof caulk. Each of the wall panels includes a first rigid layer, a second rigid layer attached to the first rigid layer by a thinset mortar, and a waterproofing layer formed of a flexible material and attached to the second rigid layer by the thinset mortar.

Disclosed herein are plaster boards that include first and second layers of hardened plaster material, a liner attached to the first layer of hardened plaster material, and a first material (e.g., a polymer material such as a viscoelastic polymer) adhered between the liner and the second layer of hardened plaster material. The liner includes one or more structurally weakened regions each extending substantially from a first edge to a second opposing edge of the plaster board. The structurally weakened regions of the liner may facilitate creation of a fissure that propagates substantially within a plane within the plaster board. Methods for making the plaster boards may involve drying wet plaster material while it is in contact with a liner having structurally weakened regions, processing a liner to form its structurally weakened regions while in contact with wet plaster material, or processing a liner to form its structurally weakened regions while in contact with hardened plaster material.

Disclosed herein are plaster boards that include first and second layers of hardened plaster material, a liner attached to the first layer of hardened plaster material, and a first material (e.g., a polymer material such as a viscoelastic polymer) adhered between the liner and the second layer of hardened plaster material. The liner includes one or more structurally weakened regions each extending substantially from a first edge to a second opposing edge of the plaster board. The structurally weakened regions of the liner may facilitate creation of a fissure that propagates substantially within a plane within the plaster board. Methods for making the plaster boards may involve drying wet plaster material while it is in contact with a liner having structurally weakened regions, processing a liner to form its structurally weakened regions while in contact with wet plaster material, or processing a liner to form its structurally weakened regions while in contact with hardened plaster material.

Provided is a building material that is lightweight, exhibits excellent formability, and is inhibited from being damaged during transportation, and a method for producing the same. Specifically, provided is a method for producing a building material, including: a first step of curing a core layer material including a hydraulic material, a silica-containing material, and an aluminum powder, to react the aluminum powder and form bubbles, and incompletely hardening the hydraulic material and the silica-containing material, to form a foamed core layer; a second step of dispersing a surface layer material including a hydraulic material, and a silica-containing material, to form an unfoamed surface layer; a third step of stacking the foamed core layer on the unfoamed surface layer, to form a stack including the unfoamed surface layer and the foamed core layer; and a fourth step of pressing and curing the stack, and a building material produced therewith.