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Instructions for installing 4-wave ASA plastic louvers under glass, polycarbonate, and corrugated metal roofs.
Install ASA plastic 4-wave louvers under glass/poly roofing (code G-4S219X25) by securing the tongue and groove joints with stainless steel screws. The panels are connected to each other via tongue and groove joints on the panel edges.
The G-4S219X25 ceiling installations must be constructed on a frame that meets the following four conditions:
- Durable material: Galvanized steel bars or stainless steel bars.
- Sturdy dimensions: Bar thickness ≥1,2mm, side length ≥25mm.
- Safe distance: Distance between bone bars ≤30cm.
- Construction in the correct direction: The support beams must be installed perpendicular to the direction of the panel installation. Specifically, for vertical panel installation, install horizontal support beams; for horizontal panel installation, install vertical support beams.



Step 1: Prepare tools and materials for installing the ASA G-4S219X25 4-wave plastic louvers. under glass, polycarbonate, and corrugated iron roofs
7 essential materials needed when installing ASA G-4S219X25 4-wave plastic louvers. under glass, polycarbonate, and corrugated iron roofs the:
- Reinforcing bar (material: stainless steel, galvanized steel; dimensions: side ≥25mm, thickness ≥1,2mm)
- 4-wave ASA plastic lamella (G-4S219X25)
- ASA plastic V-shaped trim (G-V45X45)
- Insulation materials (silver foam 5mm or more, heat-insulating corrugated iron, plastic foam)
- Stainless steel flathead screws (using the flathead to securely fasten the screw to a rigid support beam)
- Copper nail
- Kosmos Exterior Glue
7 essential tools for installing ASA G-4S219X25 fluted panel cladding. under glass, polycarbonate, and corrugated iron roofs These include: angle grinder, drill, welding machine, laser level, tape measure, protractor, and nail gun.


Step 2: Construct an additional frame structure to install the 4-wave ASA plastic louvers under the glass, polycarbonate, or corrugated iron roof.
Construct a new frame layer (stainless steel or galvanized steel, each bar has the following dimensions) ≥25x25mm, thickness ≥1,2mm). At the connection point of 2 panels, 2 double ribs with a distance of 5mm are needed.
| Vertical ceiling panels Using a welding machine, weld the ribs firmly with the distance between the ribs. ≤30cm horizontally, the weld needs to be smoothed and painted with anti-rust paint. | Horizontal ceiling tiles Using a welding machine, weld the ribs firmly with the distance between the ribs. ≤30cm vertically, the weld needs to be smoothed and painted with anti-rust paint. |
Erect a horizontal frame under the glass, polycarbonate, or corrugated iron roof.

Step 3: Install the insulation material onto the frame.
After having a new skeleton system, install a layer of insulation material (silver foam 5mm thick or more, heat-insulating corrugated iron or plastic foam) on top of this skeleton and fix it with glue or stainless steel screws.

Step 4: Weld the new frame onto the existing frame for the glass, polycarbonate, or corrugated iron roof.
Weld the new frame (a frame with pre-installed insulation) to the existing frame of the glass, polycarbonate, or corrugated iron roof.
- The weld should be smoothed and painted with anti-rust paint.
- The distance between the new frame and the glass, polycarbonate, or corrugated iron roof should be 300-500mm.
- The frame is slightly sloped outwards by 2-3% to prevent rainwater from seeping back in.
- The gap between the frame and the wall (if any) is 7-10mm. This is a safe distance to allow for the expansion of the frame and the ASA plastic cladding panels.

Step 5: Install the ASA plastic 4-wave louvers onto the frame.
Secure the 4-wave ASA plastic louvers (G-4S219X25) to the ceiling frame using Kosmos exterior adhesive and stainless steel screws, specifically:
- Apply adhesive to the frame before installing the fluted panel.
- Place the ASA plastic fluted panel (G-4S219X25) in the position where adhesive has been applied to the support frame.
- Drill pilot holes into the groove of the fluted panel before screwing in the stainless steel fasteners (the distance between pilot holes and screws should be equal to the distance between the support bars ≤30cm).
- Screw the fluted panel onto the support beam through the pilot holes.
- Install the male tongue and groove to conceal the female tongue and groove of the 4-wave louver panel.
Perform the process of securing the female and male tongue-and-groove joints continuously until the entire wall surface is covered. A gap of 7-10mm should be left at the end point against the wall for installing the V-shaped trim.










Step 6: Cover the edges of the ASA G-4S219X25 fluted plastic panel ceiling with V-shaped trim.
There are two ways to secure the V-shaped trim to the ASA G-4S219X25 fluted plastic panel during construction. bare the:
- Secure the trim with adhesive and stainless steel screws (flip-top/fish-tail type), with the screw holes spaced ≤300mm (≤30cm).
- Secure the trim with adhesive and a nail gun, ensuring the nail holes are spaced ≤100mm (≤10cm) apart.
Note: When joining a V-shaped trim at a right angle, cut both ends of the trim at a 45-degree angle.


*Kosmos recommends
To ensure the durability and aesthetic appeal of ceiling panels made from ASA 4-wave plastic, and to prevent rainwater from accumulating and causing mold, customers should install additional "water strips" to ensure the ceiling's longevity.
A water line is a line that is usually raised with mortar on balconies and loggias. A water cut-off strip/water hook can be used instead. This detail prevents rainwater from flowing back into the ceiling.

Note: Instructions for installing ASA G-4S219X25 4-wave plastic louvers. under the glass roof, poly This information is for reference only. To determine the most suitable construction plan, a specific site survey is required to develop an optimal construction solution.
In addition to ceiling panels, customers can also Wall cladding using fluted panel G-4S219X25.
Installation of 4-wave ASA plastic cladding. under glass, polycarbonate, and corrugated iron roofs Proper application techniques will ensure a beautiful, durable finish and a lifespan of 5-10 years. If you require further assistance, please contact us. Consulting on construction methodsPlease contact us at this number. 0932.067.388 For the quickest and most accurate support.







