Installation of polycarbonate skylights on different roof cladding

Installation of skylights on asphalt shingles and PVC membrane cladding

Asphalt shingles and PVC membrane are two types of roof cladding which allow the greatest freedom of choice in planning and designing roof skylights. The biggest advantages of such claddings are the facts that they prevent water and snow retention and facilitate the installation of aluminum elements and clogging the skylights with asphalt.

Installation of skylights on metal roof cladding

Box profile metal sheets and corrugated profile metal sheets do not possess the advantages mentioned above. Rain water and snow which slide down the roof with metal cladding should by no means encounter any obstacles.

In the case of box profile sheet cladding, the skylights should not be installed below the roof ridge or the topmost part of the roof. This will help to avoid a situation in which their side walls create a hollow which would accumulate rain water and cause its leaking into the building.

Skylight along the roof ridge:

Skylight across the roof ridge:

Skylight base

The easiest and the cheapest way to make a skylight base is profile from a metal sheet.

A metal sheet of 1,5 or 2 mm in thickness is usually enough for skylights of around 3 m in width.

What needs to be taken into account, however, is that the height of the base should be 15 - 20 cm higher than the outermost roof cladding layer. Moreover, in order to facilitate its installation with electrical tools, the base should be 30 cm high

What needs to be taken into account, however, is that the height of the base should be 15 - 20 cm higher than the outermost roof cladding layer.

Moreover, in order to facilitate its installation with electrical tools, the base should be 30 cm high.