If you’re planning or starting a home project that involves concrete, you may be wondering about the weather and asking if it’s possible to pour concrete in the rain. The short answer is yes, it can be poured in the rain, but there are several factors to consider.
In this article, we take a closer look at what you need to know and do if it’s raining the day you want to pour your concrete for your shed base, foundations, path or other project that involves pouring concrete.
What issues can arise when pouring concrete in the rain?
Mixing concrete requires an exact balance of cement, aggregates, and water to ensure it will be strong and reliable. When it’s poured in the rain, it can create several issues, including:
A weakened surface that is soft, powdery and flaky
Pitting marks on the top layer that look like dimples
Takes longer to set due to the rain
An inconsistent mix that can alter the material ratio
When is it safe to pour concrete in the rain?
The timing and intensity of the rain will impact when it’s safe to pour concrete in the rain. If there is light rain before pouring, you can continue with no issues as long as the site is prepared correctly and the sub-base isn’t waterlogged.
If there is light rain after you’ve poured, this will not significantly affect the concrete, and in hot climates, it can help slow evaporation. Heavy or persistent rain can be a greater concern, as it can wash away cement and impact the overall finish and durability. If heavy and persistent rain is forecast, it may be best to delay.
Top tips for pouring concrete in the rain
It’s not always an option to delay the pour, so if the weather really isn’t on your side, here are some top tips for pouring concrete in the rain:
Use plastic sheeting or tarpaulins to keep the area dry until you’re ready to pour
Keep covers nearby to protect the slab immediately if rain starts during the pour
Make sure the sub-base is compacted and not saturated
Remove any puddles and avoid pouring onto mud or standing water
Plan your pour during a dry window, even if it’s short
Have enough labour on hand to finish the surface quickly before the rain
Avoid overworking the concrete, as this can weaken the surface
Once the surface is set, cover the slab with plastic to allow for consistent curing.
What to do if rain damages wet concrete
If rain damages wet concrete, allow the surface water to naturally evaporate or drain before inspecting the area. Light rainfall often affects only the top layer and can be lightly brushed or reworked. If the damage is more severe, professional advice may be necessary, as repairs or resurfacing may be required.
Are you planning a home project?
If you’re planning a home project, then you may want to consider using ready mixed concrete. Using our ready mixed concrete ensures you don’t mix or pay for too much concrete. Plus, having a consistent mix enables you to work quickly if the weather changes and you have to pour in the rain.
Please call us to discuss your requirements. Contact us today by calling 01327 206 650 or by completing our contact form.