Milling

If a screed is already present, channels can be milled into it. The milling machine is connected to a powerful vacuum to create dust-free grooves.

For a renovation project with a screed of at least 30 mm, this is economically the best option. Standard 16 mm pipes are installed, with the grooves milled to an average depth of 20 mm. The exact depth varies due to wear on the milling blade.

There may be existing utility pipes in the floor — gas, water or electricity. The route of these pipes is mapped as thoroughly as possible to prevent damage during milling.

During milling work, utilities are shut off, with the exception of the required electrical circuit. Unfortunately, damage to existing pipes cannot always be prevented. Often, immediate repair is possible, for which additional costs are charged. In some cases, a third party must be called in. Please anticipate unexpected additional costs.

The milling dust is collected in bags — expect approximately 10 household waste bags per 50 m². A container or big bag can be arranged, or you can bring the bags to a waste separation station yourself. Lift the transparent bags from the sides, by the cable ties.

After installation, the system is pressurised with water to test for leaks. Then the grooves are filled with low-shrinkage, dimensionally stable repair mortar. This is important: open grooves reduce heat transfer because trapped air acts as insulation. In addition, open grooves can cause problems with sharp edges. Caldi therefore prefers to fill the grooves ourselves.