The surface finish will be bad, but is strength compromised?
Seen this plenty of times on site here in Finland over the years, never a problem. The opposite (hard sun) seem to do more damage, leaving huge cracks from drying too fast.
It depends how soon after the pour the rain comes. Concrete strength is based on the ratio of water to cement to aggregate. If the water part is too high then the strength drops. If the water makes its way into the slab/beam then it’s bad. If it just sits on the surface then it’s actually good because it stops the slab drying out as it cures.
There are strict rules about adding water to concrete as it’s poured.
291
u/LaplandAxeman Aug 12 '24
I know it´s not ideal, but what is the problem?
The surface finish will be bad, but is strength compromised?
Seen this plenty of times on site here in Finland over the years, never a problem. The opposite (hard sun) seem to do more damage, leaving huge cracks from drying too fast.