Light panels Apan

The Apans are the double-layered formed panels with the upper, respectively the exterior layer usually made of the cast acrylic Aglas or of some other thermoplast (extruded acrylic, solid polycarbonate), and the bottom layer made of the structured polycarbonate sheets (SPC sheets) of various thickness and various structures. The structured polycarbonate panels improve the heat and sound insulation performance of the light panels Apan.

The Apans are used as light elements of the trapezoidal or corrugated roof coverings, made of metal, galvanized sheet, or fibre cement sheets.

The light panels Apan are always fixed to the appropriate secondary substructure (most frequently to the metal Z profiles). They are suitable for the incorporation on roofs with the inclination, no smaller than 6°.

The Apan is a low-cost type of the skylight, however, it shall be taken in consideration that it is always fixed and therefore it can not provide air ventilation of premises and the natural smoke and heat exhausting in the case of fire.

Composition of the Apan formed light panels

The light panel Apan is made of the upper and the bottom layer. The upper layer is usually made of the cast acrylic Aglas or of some other thermoplast (extruded acrylic, solid polycarbonate), while the bottom layer is made of the structured polycarbonate sheets (SPC sheets). The fitting of the panels along the length and width is carried out by overlapping.

The upper layer is adjusted to the shape of the basic corrugated or trapezoidal roof covering. The bottom SPC sheet is frontally pasted with the vapour transmission perforated tape. The space between the acrylic sheet and the polycarbonate sheet is closed with the polycarbonate elements, whose shape is adjusted to the opening between the bottom and the upper layer of the panel. The elements of the polycarbonate and the acrylic sheets are glued with the sealing agglutinative mass. All the joints are sealed, therefore no condensation appear between the polycarbonate and the acrylic sheet.

Scheme 1: Presentation of the basic cross-section of the light panel Apan. The polycarbonate sheet is drawn schematically, various thicknesses have different number of chambers, and nevertheless, the polycarbonate sheets can be done in various structures.

Scheme 2: Ground plan of the light panel Apan

Scheme 3: Longitudinal cross-section of the Apan panel

Types of Apan panels

The light panels Apan can be manufactured in various designs regarding the choice of material of which the upper or the bottom layers are made of.

Upper layer

The basic function of the upper layer is to adjust itself, by means of its trapezoidal or corrugated shape, to the basic roof covering, thus enabling the incorporation of the light panel to the roof covering. Considering the fact that this layer is exposed to the exterior weather conditions, it is important that it is made of the high quality and correctly shaped material.

Bottom layer

The basic function of the bottom layer is to improve the insulation and sound properties of the light panels Apan. We can achieve various values of the heat and sound transmission with the choice of the suitable SPC sheets. The light transmission of the light panels Apan depends on the choice of the type of the SPC sheet, as well.