Patching Concrete Rendered Wall

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.

Patching concrete rendered wall.

Filling cracks in render. Cut the nozzle to the width of the crack and apply a bead of the mixture into the crack. Allow this to dry for several hours. Using a sponge lightly rub the render to achieve the desired effect and to blend with the existing material.

The methods discussed in this article can be used to repair minor non. 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. Remove the masking tape and any excess material and allow to dry. 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.

Render joint and patch has superior workability and it s texture will provide a seamless result when used for patching 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. Apply a coat of sealer to the concrete rendered wall if the render is made of acrylic. Fill a cartridge with the mixture and load into a cartridge gun.

However for cracks wider than inch quick setting cement based fillers are advisable to use. Small patch repair of up to 0 5m will cost around 75. 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. Excellent workability with a render texture finish.

Apply the render using the filling knife to the required depth max. Ready mixed easy to apply.