Here's how to replace a rotten wooden floor with a concrete floor. The same method is also used when replacing a floor containing red ash.
John explains the layers necessary to create a solid concrete floor. This involves:
🔵 Hardcore;
🔵 Sand blinding;
🔵 Damp proof membrane (DPM);
🔵 Insulation; and finally
🔵 Concrete.
The hardcore is first compacted using a wacker plate. A thin layer (approx. 30mm) of sand is then laid on top to prevent the stones from the hardcore penetrating the damp proof membrane. This is called sand blinding.
The damp proof membrane is a thin layer of plastic sheeting (such as Visqueen), which, of course, prevents damp from coming up into the concrete floor.
A layer of rigid insulation is inserted before the final layer of concrete.
Replacing and old unstable floor with a concrete floor is quite common in our refurbishment projects. As Stoke-on-Trent is a former mining area, many of the older properties have red ash floors.
Due to a lack of building supplies after the Second World War, products like red ash were often used as infill below concrete floor slabs between 1945 to 1970.
The problem with red ash is that it contains sulphate. When sulphate gets damp it causes a chemical reaction - during which a gas is released causing the overlying concrete to crack or bulge (sulphate attack).
This can cause serious structural issues in a property. Hence the need to install a new concrete floor.
…
We're not just here for the major refurbishments. We're also here for the smaller jobs.
Need your old wooden floor replacing with a concrete floor? Get HYPE.
Call us on 01782 930043.
#concretefloor #floorreplacement #howtoreplaceafloor
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