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Specify the protective sheet around the tent floor it needs to fit. Bring DERFLEX your floor outline, finished-size requirement, connection details and packing target to review a custom tent footprint or camping groundsheet program. Material, cutting route and attachment construction are confirmed for the proposed product before sampling and bulk quotation.
This page is for the custom under-tent sheet: a tent groundsheet, tent ground sheet tarp or model-specific footprint. It is a procurement brief for a separate article, rather than a complete tent or roof system.
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| Product | Primary job | What to specify |
|---|---|---|
| Under-tent groundsheet | A separate protective layer positioned against ground contact below a tent floor. | Finished floor outline, abrasion contact, edge fit, seam placement and storage routine. |
| Overhead shelter tarp | A pitched sheet above people, tents or equipment. | Protected space, roof slope, support, drainage and reinforced overhead tie-outs. |
| Integrated or bathtub floor | A floor with raised sides or a designed connection to the tent body. | A separate construction brief covering side height, corners, seams and tent interfaces. |
Discuss coated fabric rolls for your own conversion, pre-cut panels or finished groundsheet tarps. A roll-material quotation does not include the same work as a finished footprint with hems, loops and retail packing. State the required format at the start.
For overhead coverage, use camping tarp shelter planning. For wider selection questions, see the camping tarp guide. Here, the order is defined by the tent floor, the finished sheet and its agreed connections.
Use the floor outline of the erected tent, or the tent maker’s approved pattern, as the starting reference. Packed dimensions and rainfly dimensions describe different things.
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| Shape or area | Provide with the brief | Approval point |
|---|---|---|
| Rectangle or square | Floor length, width, corner treatment and a check dimension such as the diagonal. | Specify the finished groundsheet dimensions separately from the tent-floor dimensions. |
| Tapered footprint | Overall length, both end widths, orientation and corner reference points. | Do not infer the narrow end from a single maximum width. |
| Curved, circular or irregular outline | A dimensioned outline or agreed template, centre references and any cut-outs. | State which edges follow a curve and which are straight; submit the pattern for cutting review. |
| Porch or vestibule extension | A separate labelled outline and exposure/drainage brief. | An extended sheet can collect runoff. Review the tent configuration and maker’s instructions before including it. |
Set the edge inset with the drawing. An exposed edge can catch rain and direct it below the tent floor. Follow the tent maker’s fit guidance and approve the groundsheet boundary for the actual model. There is no universal inset value that fits every tent.
Identify whether dimensions refer to the tent floor, cut blank, finished fabric edge or outer attachment envelope. Hem returns, joining and loops change these boundaries. Define dimensional tolerances and the measurement condition before signing off.
Record the tent model, pattern revision, orientation and size code. A model name alone may not identify a revised tent floor. For repeat orders, use the approved drawing and retained sample rather than reconstructing the pattern from a catalogue title.
Mark each connection on the pattern with a reference such as A, B, C or D. Give the offset from a known corner or centreline, projection beyond the finished edge, required clear opening and intended direction of pull.
A loop used to keep a sheet aligned during pitching has a different interface from a tent-pole fitting or load-bearing tie-out. Specify the mating pole tip, clip, buckle or stake arrangement where relevant. Do not assume an eyelet that accepts a stake also fits a pole.
Submit the proposed webbing, loop or hardware detail for material and assembly review. If you intend to supply a proprietary connector, include the part drawing or a physical reference.
For a finished cut-to-fit sheet, show the boundary and hem return. If a prototype needs an edge folded underneath for a trial fit, photograph that return and agree the revised production outline. Avoid leaving an exposed flap that catches runoff.
An under-folded edge does not create a sealed bathtub floor. Raised sides, sewn-in floors and zip-in connections need their own construction brief.
Select the material and assembly together. The chosen sheet must work with the floor shape, seam process, cleaning routine and storage target for the intended camping product.
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| Decision | What to agree | Practical boundary |
|---|---|---|
| Proposed material | Construction, grade, surface, mass per area and the reference sample. | PVC coated polyester can be reviewed for durable, vehicle-carried or campsite products. A lightweight backpacking target needs its own material review. |
| Abrasion and puncture exposure | Contact surface, expected repeated use and proposed acceptance checks. | A groundsheet is a sacrificial protective layer, not a puncture-proof barrier over sharp objects. |
| Seams and edge finishing | Panel plan, seam locations, hem or binding detail and tolerances. | Material waterproofness does not establish leak resistance at joins or attachment penetrations. |
| Packed product | Maximum folded size, packed mass target, bag brief and clean/dirty-side handling. | Fabric GSM is only one part of finished mass. Hardware, seams, reinforcement and packaging also contribute. |
Read about PVC coated fabric construction and cutting PVC tarp panels when preparing the manufacturing brief. A cutting guide is not proof that every shape, tolerance or attachment can be supplied.
Specify a waterproof camping groundsheet through evidence. Agree how the material and finished joins will be assessed under the intended ground-contact conditions. This page assigns no water-pressure value, abrasion rating, cold limit or service-life guarantee to an unconfirmed grade.
Request actual, identifiable sample photographs with the measurement record. The schematic above cannot replace a measured prototype or demonstrate its material and attachment performance.
Photograph the complete relaxed sample, its ID and orientation, with the full boundary visible. Keep the camera square to the surface so the outline can be reviewed.
Show the tape from the agreed datum to the finished edge. Include a close view of each reading, both end widths for a taper and the diagonal or other agreed check dimension.
Show each labelled strap or loop, its projection, the reinforcement and the mating part. Photograph any edge folded under for the trial and identify the intended final cut line.
Show the sample under the intended tent without a projecting rain-catching edge. Record the approved folding sequence and packed dimensions; include measured mass if it is an acceptance item.
A sample can fit the floor yet still need changes to seam placement, reinforcement or folding. Record dimensional results, attachment observations and any agreed fabric or seam test as separate checks.
Keep the accepted pattern, material reference, hardware list, photographs and packing specification together. Record changes before bulk production. See DERFLEX quality control for the wider inspection workflow; product-specific acceptance criteria belong in the order.
Identify the compatible tent model and revision, size code, front/back orientation and included fittings. Separate a groundsheet-only SKU from a kit containing additional parts. Approve the label, instructions, barcode and retail packing brief with the sample.
For in-house fabrication, request the relevant tarpaulin roll supply information and define which cutting and finishing operations your business will complete.
Specify cleaning frequency, inspection points, drying and storage space. Consider identification marks that remain useful when sheets are wet or folded. Agree how staff distinguish different outlines and where returned units are checked for wear.
Keep repair or retirement criteria appropriate to the approved material. Repeated ground contact, trapped grit and damp storage affect the article differently from overhead use.
What changes the quotation? Material and usable roll width, pattern yield, number and length of seams, attachment construction, size/color splits, sample work, branding, packing and delivery terms. Send quantities by model and size. MOQ, sample charges and production timing are confirmed for the proposed order.
For broader drawing and finishing discussions, see custom tarp procurement.
Use this short brief to start a material and construction review. If a measurement is not yet available, write “see drawing” and identify the reference you will send. A quotation follows the confirmed scope.
A tent groundsheet is a sheet placed on the ground, usually below a tent floor. A footprint commonly means a groundsheet shaped for a particular tent model. Specify the actual floor outline and intended coverage instead of relying on the product name alone.
A tarp can be reviewed for under-tent protection if its construction, ground-contact behavior and finished size suit the tent. Keep exposed edges from catching runoff and follow the tent maker’s guidance. An overhead tarp specification does not automatically establish suitability as a groundsheet.
Provide the tent-floor length and width, both end widths for a tapered shape, orientation and any curves or cut-outs. Show the required groundsheet boundary and label all connections. The cut blank, finished fabric edge and outer loop envelope are different measurement references.
DERFLEX publishes coated-fabric, cut-panel and custom-tarp supply routes. Send the proposed groundsheet material, pattern, quantity and mating connector details for project review. The specific grade, cutting route, tolerances and connection assembly must be confirmed before a sample or bulk order is approved.
Agree checks for the proposed material and finished seams under the intended ground-contact conditions. Review dimensions, seam locations, attachment penetrations and any damage from the handling trial separately. A fabric-only claim does not verify the whole finished sheet.
Send the floor drawing, finished fit requirement, quantity by model and size, material preference, connection map, packing target and destination. Identify the actual sample measurement photographs and acceptance checks you need. MOQ, sample fees, freight and production timing are confirmed for the project.
Bring the dimensions, connection intent and order quantities. Review the material, cutting profile, sample evidence and packing scope with DERFLEX before locking the production specification.
Contact: sales@derflex.com. Drawing and sample review determine the final scope.
