Fix sheets on purlins at maximum centres of 45cm. Corrugation end lap: 20cm Corrugation side lap: One Nails per sheet: 25
Sheets must be laid on fully supporting roof deck. Corrugation end lap: 30cm Corrugation side lap: Two Nails per sheet: 20
Start alternate courses of sheets with a half width sheet; this forms a broken bond sheet pattern, thus avoiding a 4 ply sheet thickness build up at the corners of sheets.
Position and fix an additional purlin at the ridge to take ridge fixings. The sheets should be laid to ridge apex to ensure sufficient weathering cover is provided.
Check the deck is at least 20mm thick to accept nails. If thinner you can either apply battens, or boarding as detailed above, or substitute nails with screws.
Fix by nailing through washer assemble and top of the sheet corrugation into the purlin below. The nail will penetrate the purlin by nominally 20mm.
Complete the fixing by clipping the integral cap onto washer body to create a weather-tight seal to the roof.
Alternatively, substitute nail with 65mm exterior screw. Length of screw can be reduced (55mm min.) for fixing onto thin decks. Check cap will clip over screw head.
Measure the size of the material required and mark out the line to be cut with chalk line or pencil onto the sheet surface prior to cutting. Always measure twice so you only cut once!
When cutting complex shapes use a pair of oiled tin snips. First mark the cut line onto the sheet and then cut to required shape.
Support the sheet and cut using a coarse bladed saw, taking time to clean and lubricate with a spray of oil on the saw as required.
Alternatively a circular power saw can be used; support the sheet either side of line to be cut, using saw in accordance with manufacturer’s instructions.
First mark out cut line in the base of the sheet corrugation. Then cut or score the sheet with a knife.
Overhang the sheets at the fascia by 5cm to form a drip edge. Reduce the fixing centre to the first purlin up from the eaves by 5cm to compensate for overhang.
Ensure the sheets are positioned square to the line of the eaves and verge, first nailing the sheet edges (allowing for laps) to keep sheets square to the eaves line.
Position and fix the verge barge board within the last sheet corrugation then fold down over the board and nail using 10mm galvanised clout nails at 15cm centres.
Alternatively, align and fix the verge barge board level with top of purlins, then overlap the sheet by 5mm off the roof edge and secure by nailing the sheet at every purlin.
Fix the sheets to ridge line, overlay ridge piece and mark out fixing line then nail ridge to one roof slope. Then next carefully bend ridge and fix to reverse side of the roof.
The ridges feature pre-formed end alignment grooves which are embossed into them. Simply overlap and align them and you are assured a professional finish.
The ridges are flexible enough to be formed to the required roof angle. Lay them square to the ridge line and fix one side first by nailing every other corrugation.
Fix timber ridge board level with corrugation height to rear of building; then fix ridge to the roof and fold ridge and nail to the ridge board to finish.
Terminate the ridge end by marking out and cutting a treated timber finial to match the ridge profile. The ridge piece is lapped onto the finial.
The finial is then simply fixed to the verge barge boards and finished to match the decorative finish applied.
65mn Spring Steel
Steel Strip, Steel Packing Strap, Galvanized Steel Strip, Iron Packing Strip - JinHe Metal,https://www.jinhejinshu.com/