Industrial coated textilesTent & awning connections
Keder for Tents & Awnings
Specify the connection that brings your fabric and frame together. DERFLEX supplies PVC-coated keder fabric and supports custom keder enquiries for tent manufacturers, awning fabricators and OEM buyers. Start with the rail profile, finished bead and attachment flap, then match the fabric and joining process. Whether you need material for your own production or a finished keder construction, define the supply format and approve a representative sample before bulk purchasing.
One connection.
Three supply decisions.
Coated textile for wrapping, forming and joining in your own fabrication process.
A wrapped-core profile with the agreed attachment flap and roll presentation.
Attachment to the tent or awning panel is a separate fabrication scope to specify.
What is keder, and what does the fabric do?
Keder is a beaded fabric edge that slides into a matching rail or track. The rounded bead is retained inside the channel while an attachment flap extends through the opening to join the main textile panel. In a PVC keder construction, a coated textile wraps the core and provides the area used for welding or sewing.
The core, wrap, flap and panel joint perform different jobs. A round bead alone does not establish the strength of the edge. The rail geometry, joining detail and main fabric all influence how the assembled connection behaves.
For material sourcing, begin with the PVC-coated fabric construction. For a replacement roof or wall, the complete keder tent panel also needs its own shape, edge position and dimensional references.
Keep rails, structural frames, installation and engineering approval as separate quotation items unless they are expressly included. A fabric or keder order does not by itself include a complete tent or awning system.
Tent keder and awning keder face different demands
Choose the edge around the way the cover is made, installed and used. A repeatedly dismantled marquee, a fixed canopy and a rolling awning need different sample checks even when their profiles appear similar.
On smaller screens, scroll the table horizontally.
| Application | Main selection question | What to evaluate | Detail to include |
|---|---|---|---|
| Event tents & marquees | Will the edge travel through the rail repeatedly? | Feeding, removal, flap alignment and wear at the rail entry. | Rail section, installation direction and expected handling pattern. |
| Warehouse & storage tents | How is the panel retained and tensioned? | Panel-to-edge joint, exposed seam and the specified load path. | Roof or wall position, fabric construction and system designer's requirements. |
| Fixed awnings & canopies | How will the edge meet the main awning cloth? | Joining compatibility, runoff detail and attachment orientation. | PVC-coated or other textile, seam drawing and exposure conditions. |
| Retractable covers | Does the edge also roll, fold or pass moving hardware? | Finished stack thickness, flexing and clearance through the movement cycle. | Roller or fold geometry, stops, guides and a representative assembly. |
Choose the main tent fabric alongside the edge. For moving shelters, review the retractable tent fabric requirements before treating a successful static fit as approval for repeated movement.
Single flap, double flap or a different edge detail?
Single flap
One attachment leg joins the panel from one side. This can simplify an edge that has a defined panel orientation and does not require a second leg. Check the available joining area after the rail slot and nearby hardware have been accounted for.
Double flap
Two legs can place the main panel between them. The added layers change the seam stack and how heat or stitching reaches the joint. Compare the completed assembly rather than assuming that an extra flap guarantees a stronger result.
Specify the drawing, not just the product name. Confirm the number of flaps, their coated faces, usable attachment width and orientation. Request confirmation of the exact construction available for your order.
Core diameter is not finished bead diameter
The bare cord and the textile-wrapped bead are different measurement references. Coating, fabric thickness, wrapping and joining can affect the outside profile. A nominal diameter without a drawing can therefore leave two suppliers quoting different components.
Send these interface details
- The rail cross-section: internal channel, retaining slot, entry and any profile changes.
- The finished edge: core reference, wrapped-bead reference, flap layout and panel stack.
- The installation route: feed direction, rail joints, bends and end restraints.
- A sample reference: a physical rail section and existing keder where available.
Agree how dimensions will be checked
For flexible parts, measuring pressure and sample condition can change a reading. Identify the reference points and the agreed inspection method on the drawing.
Use the actual rail for a trial of the completed edge, including its joint to the main cloth. Record both smooth travel and retention under the conditions required by the system designer.
Do not derive an allowable load from a successful hand-feeding trial. Rail fit, seam strength and structural performance are separate acceptance questions. The PVC tarpaulin keder overview explains the basic edge-to-track connection.
Turn a sample into a clear supply agreement
DERFLEX's keder range is based on PVC-coated textile. Select the exact fabric, core and finished construction for the application, then record the agreed values and acceptance criteria. The fields below are quotation inputs, not a universal stock specification.
On smaller screens, scroll the specification table horizontally.
| Specification field | What the buyer should define | Why it matters |
|---|---|---|
| Supply format | Textile roll or strip, finished keder, or a separately specified panel assembly. | Sets the work included in the price. |
| Wrap & main panel | Coating type and face, base textile, selected grade and panel material. | Establishes the material pairing for joining trials. |
| Core & finished bead | Material, shape, dimensional references and agreed tolerances. | Prevents confusion between bare cord and wrapped profile. |
| Flap & attachment | Leg count, usable width, orientation, joint position and seam stack. | Defines fabrication access and the finished edge layout. |
| Service requirements | Exposure, movement, cleaning and any named test or documentation requirement. | Connects evidence to the intended construction. |
| Rolls & identification | Length, permitted joins, winding, labels, colour reference and packaging. | Supports cutting plans and repeat-order identification. |
For wider material selection, see the keder tarpaulin product overview. Use one approved specification for purchasing, sample approval and incoming inspection so that a visual match does not replace a construction match.
Look closely at the wrap and the joining area
Attachment area
Evaluate the fabric available for joining, the wrap orientation and the transition from bead to flap. A photograph cannot establish weld strength or rail compatibility.
Colour & surface reference
Use an approved physical sample to define colour and surface appearance. These pictured examples do not establish stock availability or a full colour range.
Validate the seam with your production materials
PVC-coated panels
Compatible PVC surfaces may be joined using a suitable hot-air, hot-wedge or high-frequency process. The appropriate method depends on the coating, equipment, accessible joining area and complete material stack. Establish the process on representative offcuts before approving finished rolls or panels.
Check the prepared surface, seam continuity and bead shape after joining. A strong base textile does not guarantee an equally strong completed joint, and an attractive seam is not a substitute for an agreed seam test.
Other awning textiles
An acrylic or other non-PVC cloth may require a sewing construction instead of direct PVC welding. Specify the thread, stitch layout, reinforcement and water-management detail with the fabricator.
For every method, trial the edge as it will be delivered. Extra layers or a joint placed too close to the rail opening can change clearance even when the unfinished keder fits.
Weather and fire requirements belong to the selected construction. Request applicable grade-specific evidence. A flame-retardant textile is not non-combustible; a fabric test does not establish a complete shelter's fire classification or wind resistance.
A practical sample-to-production review
Use the following approval sequence to turn the initial enquiry into a repeatable purchase. Agree which records and checks are part of the order; the sequence is a buyer review framework, not a claim that a specific product has passed these tests.
Define the reference
Identify the drawing revision, application, rail and main fabric. Record which supplier provides each part and who approves the assembled interface.
Make a representative edge
Include the selected wrap, core, flap and actual panel joint. Evaluate the finished assembly rather than the loose cord or fabric alone.
Review fit and required evidence
Check feeding and removal in the actual profile. Separately agree the seam, retention, exposure or movement tests required for the intended system.
Release the approved construction
Retain the reference sample and specification. Set dimensional checks, roll presentation, identification and the way later material changes must be communicated.
DERFLEX's quality control overview describes its broader material and roll inspection approach. Ask which inspection records apply to the particular keder order.
Plan handling, replacement and quotation details
Installation & service notes
Inspect rail entries, joins and damaged surfaces before feeding the edge. Clean the track using the system supplier's method, maintain the intended feed alignment and investigate any binding before applying more force.
Keep end restraints, panel tensioning and water runoff in the system detail. Inspect concentrated wear near entries and joints during service. Clean and dry textile components before storage according to their material guidance.
For replacements, compare the full existing edge and rail. A colour match or a familiar nominal size is insufficient to define a compatible replacement.
What changes the keder price?
The material construction, wrap width, core, flap arrangement, processing scope and quantity affect the quotation. Colour requirements, permitted roll joins, packaging, inspection documents and delivery terms can also change the commercial offer.
Compare quotations against the same drawing and supply scope. Ask for MOQ, sample arrangements, lead time and shipping terms for the selected construction instead of assuming that an advertised material range represents ready stock.
For OEM supply, identify the first approval order separately from the repeat-order forecast. This lets the quotation reflect the actual review and delivery stages.
Keder sourcing FAQ
What is the difference between keder fabric and finished keder?
Keder fabric is the textile used to wrap the core and form the attachment flap. Finished keder includes the wrapped core and its joined flap construction. A quotation should identify which form is supplied and whether attachment to the main panel is included.
How do I choose the right keder diameter for my tent or awning?
Use the rail drawing and a physical rail section to specify the finished bead, channel and slot together. Clarify whether a quoted diameter describes the bare core or the wrapped bead. Approve a complete edge sample in the actual rail before ordering production quantities.
Is single flap or double flap keder better?
Choose according to the panel layout and joining method. A single flap provides one attachment leg; a double flap can place the panel between two legs. Additional layers change the weld or stitch construction, so neither design is automatically stronger for every application.
Can PVC keder be attached to acrylic awning fabric?
The joining process must suit both materials. A sewing construction may be needed for an acrylic textile that cannot be welded like PVC-coated fabric. Specify the thread, seam, reinforcement and water-management detail, then evaluate a representative sample.
Are UV resistance and flame retardancy standard on every keder?
These properties depend on the selected textile, core and construction. State the required exposure and any applicable fire-test requirement in the enquiry. Ask for evidence that identifies the exact supplied grade and scope; a fabric report does not certify the complete tent or awning.
What should I send DERFLEX for a custom keder quotation?
Send an application photo or rail drawing, a rail section if available, core and finished-bead references, flap layout, panel fabric, joining method, quantity and destination. Include the required documentation and delivery plan. If dimensions are unknown, start with photos and an existing sample.
Tell us about your tent or awning connection
Send a rail drawing or a clear photo, an existing edge sample if available, the main fabric, required supply format, quantity and destination. Add your joining method and any documentation requirements. You can start with an application photo when the dimensions are not yet known.
DERFLEX · PVC-coated textile and keder enquiries · sales@derflex.com