To protect the fence from the destructive effects of atmospheric phenomena, a so-called apron is installed on top of it, which is made of a metal profile, galvanized or copper. Its design must include special drippers, through which water will be diverted from the structure. Thanks to the drippers, water getting onto the fence structure is practically excluded.
Often, for concrete or brick fences, the metal apron is replaced with concrete slabs or decorative stone laid on top of them.
In any roofing structure there are areas that are particularly dangerous in terms of water leakage and corrosion. For example, the installation of a steel apron is carried out through finland mobile database crutches, so all fastening points must be treated with silicone sealant, the roof-to-parapet junction, as particularly susceptible to water leakage, must be reliably sealed. Sealing is also required for the joints between concrete slabs laid on top of the enclosing curb.
This type of connection is achieved by joining the roof and parapet together using a lateral or frontal connection.
Along the fence, niches and curtains are provided for the installation of aprons, for example, from galvanized sheets of roofing metal, with subsequent fastening. The upper part of the metal sheets is inserted into these recesses. Black roofing steel can also be used for these purposes, but only if it is painted twice on both sides, using hot drying oil. The need for niches and curtains when arranging an abutment arises due to the fact that, as a rule, one roofing sheet of one type or another is not enough to ensure a reliable and tight fit. For example, due to its not quite even vertical part or due to the destructive effects of precipitation, temperature changes, etc., the material may come off the curb.
Adjoining device
The technology for arranging these areas, depending on the presence of curtains or niches, differs somewhat.
When the top of the galvanized or black roofing sheet is installed in the recess, its height should be at least 10 cm.