keder roof sheeting

The distinction between PE and PVC is more obvious.

PE keder roof sheeting:

Polyethylene is translucent and easy to process. So, this material is ubiquitous in our articles of daily use.

It’s odorless and non-toxic, with high resistance to moisture.

And It can be used normally at -70℃ to -100℃ benefit from the excellent low-temperature resistance and good chemical stability.

The production of PE keder roof sheeting is akin to PE tarp, it generally uses HDPE ( High-density polyethylene ), which offers such advantages as high rigidity and high chemical resistance. It’s also waterproof.

The PE keder roof sheeting production process:

Mixing & tape extrusion — Weaving PE fabric — Laminating on both sides–automated cutting — welding — Folding, packing & stacking

PE roof sheet is popular among many customers due to its lightweight, affordability and wide range of available colors and sizes.

PE keder roof sheeting is designed for temporary use, and it will not last as long as PVC roof sheet, it’s not suitable for long-term usage in the outside or bad weather environment.

Customers looking for quick short-term use will find our PE roof sheet to be a cost-effective solution.

On the other side, HDPE can cause stress cracking easily with the affection of environment, which limits its application in industry. Because of its wick tear strength, the disadvantage is that it is easy to tear and wear.

It’s hard to imagine the PE keder roof sheeting can not prevent water leaking after being used once or twice. You may suffer a loss or damage caused by the weakness.

PVC keder roof sheeting:

PVC keder roof sheeting is a high-strength polyester fabric coated with polyvinyl chloride (PVC) resin mixing with plasticizers, stabilizers, flame retardants, preservatives and other chemical additives, plasticized at high temperature.

The material, percentage of resin and density are keys in determining whether a PVC sheet performs well.

PVC sheet is based on polyester fabric, coated with enviromentally friendly resin on both sides, one-step forming. The PVC resin fill the gap of fabric, so the PVC keder roof sheeting has excellent property, such as:

• Properties of waterproof, mouldproof, cold resistance, aging resistance, anti-static electricity, etc.
• The elongation at the break, tensile strength and tear strength are better than traditional roof sheets.
• with superfine abrasion performance and anti-skid treatment on surface
• Heat sealing can be used to reduce the joints and eliminate sewing needle holes
• Various bright colours are available according to the needs.

  Manufacturing Process:  

  Polyester Standard Filament Fabric — Impregnated — Drying until firm –Calendering and cooling — Folding, packing & stacking.

  The keder roof sheet is made of PVC by coated resulting in an appropriate rain-proof function. It has better weathering quality than the PP and PE roof sheet. The waterproof effect also precedes other water-resistant tarpaulins.

  It can be used for long-term outdoor covering, such as waterproof cloth for truck transportation and cargo ship, wind prevention canvas for breeding industry, rain gear for coal-field, and so on.

  If you’re looking for the strongest and most long-lasting roof sheets, our PVC keder roof sheeting will be the right choice for you.

  the reasons why we use PVC instead of PE to manufacture keder roof sheeting are multifarious. Overall,

  1. The waterproof ability of PVC is better than PE.
  2. PVC keder roof sheeting is more hard-wearing.
  3. PVC sheeting is propitious to outdoor work.
  4. PVC keder roof sheet has much better ageing resistance than PE sheet.

  No matter the size of your project, we’ve got you covered.

The PVC tarpaulin is ideal for temporary roof coverings in keder roofs. The manufacturers will offer you PVC tarpaulins with widths that can fit the keder roof bay width of the scaffold. These rolls come with a variable-sized keder bead attached at the edges of the tarpaulin throughout the length so that you can easily install it on keder systems.

Follow these steps to install a PVC tarpaulin for keder temporary roofs:

• Make sure that the keder roof is correctly assembled and ready for the roof covering installation.
• Choose a tarpaulin that can fit with the roof bay width of the scaffold. Since all the roof bays have similar widths, choose several PVC tarpaulins to cover the whole roof area.
• You have to proceed by installing tarpaulins on each single truss bay individually. Start from any one side. Position the tarpaulin in front of the truss bay you have chosen.
• There is a hollow pocket at the end side of the roof sheet to insert a tube for pulling the sheet. Insert a tube through this pocket. Fasten a rope on two sides of this tube leaving some sagging in the center. Fasten another rope at the center of the previous rope. So, when you pull the second rope, the attached ends of the first rope will pull the tube at two points.
• Lay the long rope over the roof. You need to place the roof covering at the keder grooves and insert it.
• Pull the rope from the other side. Try to pull the rope evenly to prevent skewing. Also, make sure that the edges of the tarpaulin remain straight as you are pulling the rope.
• When the first end of the PVC tarpaulin reaches the other side, stop pulling, keeping a 15 cm to 20 cm extended portion. Make a fold with the extended portion around the frame rails at the opposite end.
• Now you need to secure the PVC tarpaulin with the rails. Use rail locking pins to sucre it. It is recommended that you use three pins at the edges and single locking pins in between the two edges, following a fixed interval.
• Follow the same steps to install the other tarpaulins until you cover the entire roof.