If you need to construct a concrete building during a bout of bad weather, here are a couple of tips that you may find helpful.
Ask your contractor to use precast concrete instead of site-cast concrete
Site-cast concrete can be problematic if a building site is located in an area which is prone to bad weather. The reason for this is as follows; if your concrete contractor casts the concrete on-site and it happens to rain whilst they are doing this, the rainwater could have a serious impact on both the appearance and the structural soundness of the freshly-poured concrete.
It could, for example, result in some of the cement within the fresh concrete rinsing away, which would leave the aggregate exposed (concrete is comprised of a combination of aggregate and cement). This could have a significant effect on the overall appearance of the structure.
Perhaps more worryingly, rainwater on freshly-poured concrete can also prevent the top layer of the concrete from sealing properly when it eventually hardens. This could make the concrete structurally weak after it has dried; as such, if the affected patch of concrete is subjected to a forceful impact of any kind in the future, it could easily crack or crumble.
This is why you should ask your concrete contractor to use precast concrete if you will be constructing the building during a period of severe weather. Precast concrete, as the name itself suggests, is a type of concrete which is moulded into a specific shape (such as a slab or a brick) in a manufacturing facility and then delivered to a construction site in 'readymade' condition.
In addition to saving you time (as your contractor won't have to spend hours upon hours casting the concrete at the construction site), using precast concrete instead of site-cast concrete will also eliminate the possibility of your building's appearance or structural soundness being affected by any rain showers that happen to occur during the course of your project, as the concrete will already be dry by the time it arrives at your site.
Be careful about how you stack the concrete bricks or slabs that your contractor will be using
It is extremely important to be careful about the way in which you stack any concrete bricks or slabs that your contractor will be using during your construction project.
The reason for this is as follows; concrete tends to be very heavy. If you leave a tall, unstable stack of loose concrete bricks somewhere on the building site and the weather becomes extremely windy, these bricks could be blown over onto a nearby labourer by a powerful gust of wind.
Being struck by such heavy objects could leave this person with a concussion or multiple fractures. As such, it is important to avoid stacking your concrete slabs or bricks too high or leaving them on any tall platforms (such as scaffolding, for example).