Methods are provided for repairing an existing structure to cover at least a portion of the existing structure with a repair structure. Such methods comprise mounting one or more standoff retainers to the existing structure; coupling one or more standoffs to the standoff retainers such that the standoffs extend away from the existing structure; coupling one or more cladding panels to the standoffs such that the panels are spaced apart from the structure to provide a space therebetween; and introducing a curable material to the space between the panels and the existing structure, the panels acting as at least a portion of a formwork for containing the curable material until the curable material cures to provide a repair structure cladded, at least in part, by the panels. Corresponding apparatus for effecting such methods are also provided.

The bottom of an expansion form is carved to approximately match the contour of the bottom of a crack or joint, while the top is allowed to run wild above the surface level. A generous bead of flexible caulk is applied to the bottom of the crack or joint and the expansion form is gently pressed into the caulk to seal the bottom of the expansion form to the bottom of the crack or joint. The damaged area is backfilled and graded, and the top of the form is trimmed after backfill sets. The lower portion of the expansion form is made from a closed-cell polyethylene foam board with sawed sides, which opens the cells to improve the adhesion of the expansion form to the backfill material. Lateral blocking may be used to support the expansion form upright and following the joint or crack while the backfill sets.

Herein are disclosed wall repair compounds comprising at least one or more polymeric binder latex emulsions, one or more inorganic fillers, and comprising an amount of organic polymeric thickener that is less than about 0.1 percent by weight based on the total weight of the wall repair compound. In certain embodiments, the wall repair compound comprises an inorganic filler system selected such that such that synthetic inorganic fillers comprise essentially 100 percent of the inorganic filler used. In certain embodiments, the wall repair compound comprises one or more glycol ether smoothing agents.

A wall repair patch is capable of repairing a hole in drywall in just a few minutes. A wall-textured top surface provides a visual appearance similar to the rest of the wall. The base is threaded and the top has a slotted or cross-shaped socket or another receiver for a screw drive system, allowing the patch to be screwed into a wall. The base is hollow and tapered, and the diameter of the top surface is greater than the diameter of the base at the latter's broadest part. Various diameters of base and top surface may be used in order to accommodate the repair of walls containing different sized holes. The length of the base is generally greater than the thickness of a drywall panel, but a length less than the thickness of drywall may be used when needed to avoid penetrating a wall stud.

A repair apparatus is configured to repair a hole in a curved wall portion of a material guide. The repair apparatus includes a patch body that can conform to the shape of the curved wall portion and a retainer that non-destructively holds the patch body in place on the wall portion over the hole. In certain embodiments, the retainers are magnets or straps. The patch body can be flexible so that it can be adjusted to conform to the shape of curved wall portions of various sizes and curvatures. The patch body can include a wear-resistant inner surface. In some embodiments, the patch body includes an outer shell and a wear-resistant inner liner connected to the shell. The liner can have one side that is unattached to the shell.

A drywall repair apparatus and method. The apparatus includes a plastic puck that is dimensioned to fill a hole in damaged drywall. The apparatus is anchored inside the wall. The apparatus may have an integrated plastic puck mounted on a plastic plank. The device mounts inside the wall and the puck fills the deep void, leaving only 1/16 to be filled with joint compound. There is no time-consuming multiple layering required. There is no need for broad feathering to hide the repair and the repair is as solid as the original wall before damage.

A gap caulking device and a caulking method are provided, wherein the gap caulking device includes long plates, short plates, a dial plate, a three-way joint, a tensioner and a limit rod, and a closed quadrilateral structure with an adjustable angle is formed by two long plates hinged to each other and two short plates hinged to each other, a dial plate and a pointer are respectively provided on the two short plates, damping rods hinged on the two short plates to each other and a three-way joint matched with the two long plates are passed through by a limit rod to achieve connection limiting, and a shape memory alloy wire is connected to the three-way joint by a tensioner and is parallel to the limit rod. The problem is overcome that the original traditional wedge-shaped material that gaps rely on has a single filling function.

A portable grout device is provided. The device includes a grout hopper, a cylindrical tube portion connected to and operable to receive grout from the grout hopper, and a drive shaft and auger assembly within the cylindrical tube portion. The drive shaft and auger assembly includes a central shaft and a helical auger screw operable to push the grout out of an end of the cylindrical tube portion.

A construction process for enhancing or repairing a concrete floor structure that includes a carbon fiber grid as a reinforcement component is disclosed. The process includes forming a trench at a top surface of the concrete floor structure, and placing a reinforcement material in the formed trench. Then, a concrete bonding agent is applied into the trench. Then, the trench is filled with concrete. As a result, the concrete floor structure is enhanced or repaired to have at least one additional reinforcement component other than the carbon fiber grid.

As may be implemented in accordance with one or more aspects characterized herein, a wall patch is adhered to a wall surface having a damaged region. The wall patch has a base layer and a plurality of layers of transparent material stacked on the base layer, with the base layer being visible through the transparent material and therein aligned around the damaged region. A surface coating is applied to an area of the wall surface around the wall patch and to the wall patch, after which a top removable layer of the wall patch is removed to expose a top surface of an underlying one of the layers. A further coating is applied to the exposed top surface of the underlying layer, and to the area of the wall surface around the wall patch.