I have a flat cast concrete roof (10 cm thick) on an outside shed.
There is a 22 cm diameter hole punched through it from a previous boiler flue - no longer there.
How would I go about filling this is? I don't want to botch it so if someone ever walks on it in the future they don't injure themselves by putting their foot through it.
There is a 22 cm diameter hole punched through it from a previous boiler flue - no longer there.
How would I go about filling this is? I don't want to botch it so if someone ever walks on it in the future they don't injure themselves by putting their foot through it.