Plastering & Rendering

Render cracking back to mesh

Anonymous user 03/03/2024 - 3.45 PM

Hi, we've just rendered a wall to 15mm using the Weber one coat render. Prepared the surface well and installed render mesh to further reinforce. Not a sunny day, did not dry out quickly but still we have a fine crack most of the way up the final finish and the lower half is blown. Hammering it off and it's taking it off cleanly back to the mesh. Any ideas why this would have happened and what we can do to avoid it happening again on the other walls still to render.

MEGA Maintenance & Waste

Rating: 4.9 out of 5

4.9/529 reviews

Milton Keynes

Best thing with using ocr is to make sure on your first coat ( scratch coat ) Pre stabilise the wall first using sbr water to wet it down and controll the suction, do a first coat were you embed your mesh and leave with a scratch finish, IE wavy lines, On 2nd top coat, again wet down a few times first to control suction, then when you put on you coat and float it to a finish, should be okay, when plaster or render looses the moisture to quick this can cause cracking or even air pockets blisters

Answered29 April 2023

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JW Plastering

Rating: 5 out of 5

5/574 reviews

Harlow

If your getting the render is coming off clean to the mesh you have applied the top coat to late the first coat was to dry.

Answered29 April 2023

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stephen harling

Rating: 5 out of 5

5/56 reviews

Weston Super Mare

You havnt mentioned what you have rendered on ie block work there’s no reason y you would need to use sbr the materials should be fine it’s supposed to be for how you done it however the answer on using a base coat and mesh and then the finish this would be needed on different backings like painted walls bricks etc

Answered9 May 2023

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Floor Specialist

Rating: 5 out of 5

5/52 reviews

Northwood

Sometime the small cracks is appear when is open space ( door, windows open or missing) is start dry quick

Answered5 August 2023

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