Pour a concrete slab

Pour a concrete slab

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Pouring a concrete slab is not a very difficult task. However, a few rules must be followed to avoid imperfections and cracks. In this article, you will discover how to pour a slab which will become the ground of your future construction. For a house, it will be necessary to make foundations. Find more articles on the theme: Quotation of exterior landscaping works

Pouring a concrete slab: the steps

1 - Drill the ground: The slab is generally installed at depth. It is therefore important to dig the soil to a depth of about 25 cm. The entire surface of the future slab must be hollowed out. 2 - Prepare the bottom of the slab: You will lay a 15 cm thick pebble layer before pouring the concrete. Above the pebbles, you will pour gravel or sand, in order to wedge the stones. The next step is to cover the entire surface of the water, to secure the bottom. It is recommended to let the water penetrate perfectly over the entire surface. This break should last a few hours. Then you can level the floor using a mason's lady. You will then lay a polyane cloth over it, to control the rising humidity. It is recommended to allow the canvas to protrude about 15 cm on all sides, so that it can then cover the formwork. 3 - Install the formwork: As soon as the surface is ready, it is time to put formwork and metal trellis on the site of the future slab. The formwork boards must perfectly delimit the slab, while remaining in contact. 4 - Pour the slab: You will have the concrete in superimposed layers of a few centimeters. It is recommended to use a concrete mixer in order to obtain fresh concrete. Once all the concrete has been poured, you will level the surface using a mason ruler. Concrete should dry in 48 hours. However, it is advisable to wait at least 2 weeks before laying the covering or performing the first work on the slab.

Tips for pouring a concrete slab

In addition to the basic method, it is essential to have the right reflexes when it comes to handling concrete. Here are some tips to help you pour the slab in the best conditions. Check the weather: To lay a slab outdoors, to build a terrace for example, you must make sure to cover the site well, especially if it is likely to rain. You should also protect the concrete in summer, as the sun may cause the water to evaporate. Create a slope: If you are laying an outdoor slab, consider creating a slope: this will prevent the water from stagnating when it rains. Respect the drying time: The drying time should never be less than 48 hours, even if the concrete seems dry. Think about plumbing: If you plan to pour a slab indoors, you will need to consider installing future electrical networks and plumbing.