Roofing Accessories: Self-Drilling Screws, PU Foam & Sealants Installation Guide
Essential Accessories for Professional Roofing
The quality of a roof installation depends as much on the panels as on the accessories used. Choosing the right components ensures a watertight, durable, and aesthetically pleasing roof.
Screws and Fixings
Self-Drilling Screws
Stainless steel self-drilling screws with EPDM washers are the standard option for fixing polycarbonate and FRP panels. The rubber washer provides a watertight seal that prevents leakage.
Fixing Hooks
For installations on wooden structures, hooks with neoprene washers offer secure fixing with thermal movement compensation.
Sealants and Tapes
Neutral Silicone Sealant
Essential for joints and connections, neutral silicone sealant is compatible with polycarbonate and does not cause cracking or discoloration of the material.
Sealing Tapes
Aluminum tape is used to seal the upper ends of hollow panels, while micro-perforated tape is applied to the lower ends to allow condensation drainage.
Aluminum Profiles
H Profile (Joint)
Connects two adjacent hollow panels, providing a clean and watertight joint.
U Profile (End Cap)
Closes the ends of hollow panels, protecting internal chambers from dust, insects, and moisture.
F Profile (Edge)
Provides a clean finish on roof edges, combining closure function and water channeling.
Accessory Selection Table
| Accessory | Material | Primary Use |
|---|---|---|
| Self-drilling screw | Stainless + EPDM | Fixing on metal |
| Fixing hook | Galv. steel + neoprene | Fixing on wood |
| Silicone sealant | Neutral silicone | Joints and connections |
| Aluminum tape | Adhesive aluminum | Upper sealing |
| Micro-perforated tape | Perforated PE | Lower sealing |
| H Profile | Aluminum / PC | Panel joining |
| U Profile | Aluminum / PC | End closure |
Selection Tips
Always choose accessories from the same supplier as the panels to ensure perfect compatibility. BONAI offers complete accessory kits specifically designed for each panel type.