![]() ![]() Instead, once the rain passes, use a float to push the water off the edge of the slab before you start finishing.This will impair the finish and further weaken the top layer. Don’t broadcast dry cement onto the concrete to soak up surface water.Don’t work the rainwater into the concrete surface, this is the biggest mistake you can make.Here’s how to react if it does pour down on your freshly placed concrete: Photo by: Mr.Note19/Shutterstock Tips for Handling Rain After Pouring Concrete Heavy rain after a concrete pour can be concerning if the concrete hasn’t been finished and had enough time for the intial curing process. Rainwater gushing from downspouts or cascading over the edge of a roof without gutters will carve a trench into wet concrete if the slab is directly beneath the overflow. Make sure to seal the edges so rainwater can’t seep underneath.Īlso scope out the jobsite before the project begins, looking for the presence and location of gutters and downspouts. Even if rain isn’t predicted, you should always be prepared to cover the concrete work with a tarp or plastic sheeting just in case. If rain is in the forecast, you should postpone a large concrete pour until conditions improve. ![]() Advice for Pouring Concrete in Rainĭespite modern weather forecasting technology and radar maps, an unexpected rain shower can develop without warning, especially during the wettest months of the year ( see these guidelines for placing concrete by region and season). Here are some tips for preventing and troubleshooting rain-damaged concrete. Once the damage is done, it can be hard to rectify and will often ruin the appearance of the finished surface. ![]() Pouring concrete in the rain can compromise its strength, increasing the tendency for dusting and scaling to develop. But after freshly mixed concrete has been placed, water in the form of a driving rain can do much more harm than good. Water is a key component of all concrete, mixing with cement and causing it to hydrate and gain strength. Pouring concrete in the rain is not only miserable, but it can also lead to problems with the final surface strength. ![]()
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