Waterproof
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I would like to ask those with experience: is it more effective to lay another layer on top of the existing SBS waterproofing layer to fix leaks, or is it better to remove it and redo the installation?
Just lay a layer directly; it’s hard to work with it after removing it
Generally, a layer is applied directly. Before laying the new one, first tidy up the old one
It is recommended to remove the existing waterproof layer; laying it directly will increase the load. The SBS load in this province is not very high, but a leveling layer and a protective layer are required, so the load generally increases by around 40 kg per square meter.
First of all, it’s best to level the base surface; if it’s not already level, it’s better to remove it. Additionally, if there is moisture between the existing waterproof layer and the base surface, this could cause bulging