Patching Concrete Rendered Wall

Repairing cracks in a concrete wall is a simple procedure that can usually be completed within a day or so.

Patching concrete rendered wall.

Dunlop render joint and patch is a two in one formulation suitable for jointing fibre cement sheet or blueboard prior to rendering as well as patching cracks and holes of existing render to a depth or width of up to 5mm. Apply the render using the filling knife to the required depth max. The methods discussed in this article can be used to repair minor non. Hacking off old render raking out the joints cleaning down the wall and then applying a new 22mm cement lime sand render in two coats to a masonry wall will cost in the region of 68 m.

Cut the nozzle to the width of the crack and apply a bead of the mixture into the crack. However for cracks wider than inch quick setting cement based fillers are advisable to use. Apply a coat of sealer to the concrete rendered wall if the render is made of acrylic. Using a sponge lightly rub the render to achieve the desired effect and to blend with the existing material.

Once dry run your hand over the finish and feel for an abrasive or. Remove the masking tape and any excess material and allow to dry. Ready mixed easy to apply. Ensure the mixture doesn t overlay the existing render but form a protruding nib of material 2 3mm in front of the line of the existing render.

Cracks that form in a concrete wall particularly a basement wall due to settlement frost heave or ground movement can be either structural or non structural. Filling cracks in render. Fill a cartridge with the mixture and load into a cartridge gun. Small patch repair of up to 0 5m will cost around 75.

Render joint and patch has superior workability and it s texture will provide a seamless result when used for patching existing render. For cracks up to 1 2 inch wide in horizontal concrete surfaces concrete crack sealants and caulk based concrete fillers will be the best option.