Once it starts ripping,
there’s no skipping
Protecting keder ends effectively is the key to avoid the costly debacle of repairing or replacing or keep repairing.
With Coverfeed® it should’nt be a question anymore
When keders were introduced roughly 35 years ago, it replaced the technique of lacing together the roof tops of tent structures and saved many hours of labor and eased installments in the industry.
It is by far the most effective and easy way of harnessing paneled sheets to structures, whether on tents, yacht sails, cars or tarpaulins. The keder concept has also introduced some challenges, such as the eventual ripping of the keder. Though no one has the problem - except from everybody else - the key to solve the problem is understanding it.
The patented Coverfeed® fittings are made to protect keder ends - the mother of most keder debacles - like no other invention seen before. The Coverfeed®
hardshell the leading edge of the keder and protect the fragile woven keder wrap from fraying and ripping...
The 5 points of damage
The path for a keder end and a Coverfeed® is paved with trouble both the forth and back movement when installing and maintaining shelter on mobile structures. Here are the crucial hotspots for keder ends
Mobile structures are typically built from crossbeams with tracks on top, that connects the next crossbeam with supports and a roof panel attached by keder. Hence a shade and shelter is established.

In the process of installing the roof panel - any panel actually - the keder works exactly like the car tire on the road; This is the transition point of the forces from the engine to the tires, that move the car the same way the panel apply forces to the to the structure on a tent via the keder.
Just by stretching a heavy PVC roof panel straight will give you an idea of the powers. The forces involved enhances the trouble for keder when it meets uneven obstacles on its way, from being fed in one end to the transition over the ridge, to the other side of the crossbeam.

Everything from unaligned crowns to grafters. To most manufacturers in the industry this is well known factors and even obvious, but at Coverfeed® we'd like to establish our mindset when speaking of the way we have solved the problem.
To a tent owner, that is involved in thousands of other managerial factors before even raising a shelter, we aknowledge the costs and debacles it applies in the field, and offer our somehow nerdish support in understanding why the trouble arise in the first place.

We'd like to share our knowledge about the issue of keder damage and how we recommend ending it.
1. The entry feed
From flaked sheet to entering the feeding; First, your keder ends and naked woven keder wrap will meet with the hard edges of the alloy beam and then the whole keder will be bent 75 degrees and get slid upwards across the eave line, constantly chafing at the truss end if not featuring a prefeed roller.
2. Sliding upwards
This is the least deteriorating process to the keder and only the quality of the tracks decide whether it will be a smooth ride. At the end of the track (eave-line) there is still continous chafe. As the weight of the sheet increases proportionally with the distance ravelled, the keder is pressed increasingly harder toward the outside of the track, hence adding furthermore friction.
3. Over the ridge/ peak/ crown
At this point, the ride is at the most critical point. Most crowns are separate units aligned with the trusses and maybe even in another matrial. An uneven alignment is a ’keder-eater’ along with the forces of the pullers and the sharp turn. Together, this represent a key challenge in protecting a keder.

4. Sliding downwards
Same issues going on as in 1, 2, and 3.
5. Downwards exit of keder end
As when entering the track, going out will make the sheet bent at the eave line and then chafe the keder when gravity pushes down the excess sheet.
6. Fastening over the eave line
Tightening the sheet all across the whole surface, making it a nice and smooth installment, takes a lot of downward racheting, putting a lot of tension on the keder, especially the parts bending over the eave line. Friction and chafe is unavoidable in this process and tensions multiplied.
keder Closeups
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