1.How do installation environment and climate adaptability affect corrugated board installation?
Wind Resistance and Load Compatibility
High-wind areas (such as coastal areas and plateaus): Prioritize tiles with greater wave heights and denser rib spacing, as these tiles offer greater resistance to wind uplift. During installation, increase the spacing between fixings and use self-tapping screws with waterproof washers to prevent wind loads from causing tile displacement or leakage at the screw points.
Snowy areas: Calculate the roof's live load and select tiles with a baseplate thickness ≥ 0.45mm and a wave height ≥ 35mm to prevent snow accumulation from causing tile dents. During installation, allow for a drainage slope (recommended slopes of ≥ 1:10 for monopitch roofs and ≥ 1:15 for bi-pitch roofs) to prevent water accumulation after snow melts. Corrosion and Rust Prevention
For corrosive environments: In addition to choosing highly weather-resistant color-coated tiles, installation precautions include:
Use hot-dip galvanized and passivated self-tapping screws for fixings to prevent metal-to-metal corrosion;
Apply a weather-resistant sealant to the overlapping joints of the tiles to prevent the intrusion of corrosive gases and moisture;
Allow a 100-150mm ventilation gap at the bottom of the wall tiles to prevent moisture from rusting the back of the tiles.
2.How do structural adaptability factors affect corrugated board selection?
Matching Purlin Spacing to Tile Type
Purlin spacing directly determines the mid-span deflection of the tile and should be determined based on the tile's effective coverage width and load-bearing capacity:
Narrow corrugated tiles (e.g., YX25-205-820, effective width 820mm): purlin spacing is recommended to be ≤1.2m, suitable for lightweight roofs/walls;
Medium corrugated tiles (e.g., YX35-125-750, effective width 750mm): purlin spacing can be increased to 1.5-1.8m, suitable for conventional industrial plants;
High corrugated tiles (e.g., YX51-380-760, effective width 760mm): purlin spacing can be increased to 2.0-2.5m, suitable for large-span warehouses or public buildings.
Fixing method compatible with structural material
For steel roofs/walls: Self-drilling screws (directly penetrating the tile and purlin) are preferred. Screw diameters should be 5.5-6.3mm, and the length should be ≥15mm through the purlin (e.g., if the purlin is 2mm thick, the screw length should be 25-30mm).
For timber roofs/walls: Self-drilling screws with pre-drilled holes should be used to prevent cracking. Anti-corrosion gaskets should be placed between the tile and purlin to prevent moisture from eroding the back of the tile.
3.How do construction operations and efficiency factors affect the selection of corrugated board?
Tile Length and Transportation/Lifting Compatibility
For conventional roofs: Prefer factory-customized lengths (e.g., 6-12m) to minimize on-site lap joints (each additional lap joint increases the risk of leakage by 30%). However, be aware of transportation restrictions-the maximum length of a single tile for road transportation is no more than 13.5m (extra-wide/extra-long tiles require special transportation, which is more expensive).
For complex roofs (e.g., with many slope curves and heights greater than 15m): It is recommended to limit tile length to 6m or less to avoid bending and deformation during high-altitude lifting and to reduce the difficulty for workers. Overlap Method and Installation Difficulty
Horizontal overlap: For medium/high-corrugated tiles, a staggered overlap is recommended (the peaks of the next tile overlap the valleys of the previous tile). This simplifies installation and provides better sealing. Narrow-corrugated tiles require an aligned overlap, which requires additional waterproofing tape and reduces installation efficiency.
Vertical overlap: Concealed snap-on (rather than exposed screw) is preferred. While installation may be slightly more complex initially, the absence of exposed screws during installation enhances leak resistance and aesthetics, making it suitable for locations with stringent waterproofing requirements (such as food processing plants and office buildings).
4.How does waterproofing and drainage design affect the selection of corrugated board?
Roof Slope and Drainage Path
The smaller the shingle wave height, the higher the slope requirement: for example, for shingles with a wave height of 25mm, the roof slope must be ≥1:8; for shingles with a wave height of 51mm, the slope can be reduced to 1:12. If the slope is insufficient (e.g., for flat roof renovations with a slope less than 1:20), waterproofing membrane (such as SBS modified asphalt membrane) should be installed beneath the shingles to achieve "double waterproofing."
Drains/Gutters: The shingles must slope toward the drain (slope ≥2%), and the ends of the shingles must extend ≥100mm into the gutter. A waterproof underlayment should be installed in the gutter to prevent rainwater from seeping in at the junction of the shingles and the gutter. Joint waterproofing
Roof parapets, skylights, and pipe penetrations should be covered with flashing (bent from a color-coated sheet of the same material). The overlap between the flashing and the tile should be ≥ 200mm, and the joints should be sealed with weather-resistant sealant.
Wall corners (inside and outside): Corner pieces should be used to avoid bending the tile directly (a small bending radius can easily cause cracking of the coating). The overlap between the corner piece and the tile should be secured with self-tapping screws and sealed with glue.
5.How do post-maintenance and overhaul factors affect the selection of corrugated board?
Maintenance Walkway
For roof spans greater than 15m, a maintenance walkway (width ≥ 600mm) must be reserved in the middle of the roof. Purlins should be installed underneath the walkway to prevent deformation of the tiles caused by maintenance personnel stepping on it.
For wall heights greater than 6m, a maintenance ladder connection should be provided at an appropriate location on the wall. The ladder should be secured away from the crest of the tile to prevent damage to the tile structure.
Coating Protection and Repair Compatibility
During installation, avoid scratching the tile coating with tools (such as wrenches and scaffolding). If the coating is damaged, promptly reapply a matching color repair paint (such as fluorocarbon repair paint or polyester repair paint) to prevent corrosion of the substrate.
Select color-coated panels with a coating thickness of ≥ 20μm (on the front). This coating is more wear-resistant and has a longer maintenance cycle (5-8 years for conventional coatings, 10-12 years for thicker coatings).