Custom Fabric Structures Manufacturer
One-off tensile and membrane structures, form-found and engineered to a specific site — free-form roofs, courtyard covers, inverted umbrellas, atrium skylights and architectural features, taken from concept through fabrication to installation by one in-house team. Ekra Decor, since 1998.
- Form-found to your site — not a catalogue product
- Free-form roofs, courtyard covers, skylights, features
- Concept to installation, one team
- Engineered to IS 875, IS 800 & IS 456
Engineering Trusted by India’s Leading Names
28+ years delivering tensile structures for corporate campuses, industrial groups, and institutional developments — built with fabric technology from the world’s leading membrane manufacturers.
TATA Motors
L&T
Reliance
Adani
Mahindra
Godrej
DLF
ITC Ltd
Maruti Suzuki
GMR Group
JSW Steel
Prestige Group
Sobha
Siemens
Tata Chemicals
Tata Tele Business Services
Power Grid Corporation
Emaar MGF
National Law University Delhi
UPES Dehradun
Vasant Valley School
Aditya Birla Group
Amity University
Vikram Solar
Tractors India
Mazda Colours
Millennium Structurals
Sehwag International School
BSBK Pvt. Ltd.
17 Miles Hotel
Rich Harvest School
The Imperial New Delhi
Moore Constructions
Mehra Construction
Ramprastha
Minda NexGenTech (UNO Minda)
Yashmay Public School
Gyan Mandir Foundation
Omega Developers
SPEC
Serge Ferrari
Mehler
Heytex
Versaid
Pait
How a custom fabric structure is designed and built
A custom fabric structure is engineered from the site and the brief rather than picked from a catalogue. The process is more involved than a standard canopy, but it is what lets the geometry, the spans and the connections all suit one particular place.
1. Brief and site survey
What is being covered, the area, the clearances, the look you are after, the wind zone and the ground conditions. Ekra Decor measures the site and checks access, drainage and how the structure connects to anything existing.
2. Concept and form options
Two or three form options — cone, saddle, wave, barrel — sketched against the site, with the trade-offs in span, height, drainage and cost.
3. Form-finding and analysis
The chosen form is form-found and then analysed for wind, and for rain or snow where relevant, in ixCube and ANSYS. Membrane stresses, cable forces and steel sections come out of this step.
4. Client 3D review
A 3D render and a walk-through of the geometry for sign-off before anything is detailed.
5. Fabrication drawings and patterning
General-arrangement and workshop drawings for the steel; the membrane surface is unrolled into compensated cutting patterns.
6. In-house fabrication
Steel cut, welded and hot-dip galvanised; membrane panels CNC-cut and high-frequency welded — all in Ekra Decor's own works, not subcontracted.
7. Install, tension, hand over
Frame erected, membrane lifted and tensioned to the design pre-stress, and a handover pack with the design calculations and an O&M manual.
For the design thinking behind it see tensile structure architecture; for entrance-specific work see tensile canopies. Browse completed projects or start a brief.
Custom fabric structures we take on
If it is a tensioned architectural membrane and it does not come from a catalogue, it is custom work — including atrium roofs and interior tensile ceilings inside occupied buildings. A cross-section of what Ekra Decor designs and builds:
Free-form & sculptural roofs
Large membrane roofs whose geometry is set by the architecture — a radial mall court, a wave-form frontage, a folded canopy.
Courtyard & atrium covers
Roofing an open court, tied into the surrounding buildings, so nothing lands in the space.
Inverted umbrellas
Modular units high at the rim and low at a central column that carries the rainwater away — for plazas and forecourts.
Membrane skylights & ceilings
Tensioned-fabric rooflights set into a roof, and internal faceted ceilings that hide services and diffuse light.
Entrance & architectural features
Feature canopies that mark and shelter a building entrance.
One-off pavilions
Bespoke conical, dome and sail pavilions for public and hospitality sites.
How a custom fabric structure is delivered
Every custom project follows the same sequence. The detail changes; the discipline does not.
- Brief & site survey — the space, the loads, the architecture and the intent are established together.
- Concept & form-finding — the membrane geometry is solved by software so the pre-stress is balanced and the surface drains; 3D visuals for approval.
- Structural design — cable and membrane stress, steel to IS 800, foundations to IS 456, wind to IS 875 Part 3.
- Patterning & drawings — the 3D surface is unrolled into cutting patterns; fabrication and installation drawings are issued.
- Fabrication — steel and membrane made in-house, with per-shift quality control.
- Installation & tensioning — own crew; erection, membrane lift, staged tensioning, drainage and geometry checks.
- Handover & support — drawings, load report, stability and material certificates, O&M manual, and maintenance support after.
Membrane options
The membrane is chosen for the project — PVC or PVDF for most work, PTFE-glass for permanence or a fire class, ETFE film where daylight is critical. The membrane materials page compares them.
PVC-coated polyester
The most economical choice and the widest colour range; blocks the rain, hail and almost all UV. PVC fabric →
PVDF-lacquered PVC
The same base with a tougher top-coat that stays cleaner under dust and pollution. PVDF fabric →
PTFE-coated glass
Non-combustible and near self-cleaning, with the longest service life. PTFE fabric →
A full comparison of the fabrics — translucency, fire class, typical life — is on the membrane materials page.
How it is engineered and built
The governing load
A tensile structure weighs almost nothing, so wind uplift is the governing load, not gravity. The membrane is form-found into double curvature so it stays taut and cannot lift, and the frame and foundations are sized for the site’s design wind pressure under IS 875 Part 3.
Steel & foundations to code
The frame is designed to IS 800 and the footings to IS 456, checked for uplift and overturning. Galvanising to IS 4759 / IS 2629 for corrosion protection.
Built off-site, raised fast
Steel is cut, welded and galvanised in the workshop and the membrane is cut and welded into panels, while the footings are cast on site. On-site work is then quick and low-disruption.
One accountable team
Survey, 3D design, fabrication, installation and tensioning are all Ekra Decor’s own team, with a handover pack of drawings, load report, stability certificate and material certificates.
What drives the cost
Cost is not a fixed rate per square foot — two structures of the same size can differ widely. The main factors:
A custom structure is priced from its own design — there is no rate card. Send the brief and the site for a concept and an itemised quote; see the cost guide for what moves the number.
Looking after the structure
- Cleaning — a periodic wash; PVDF and PTFE surfaces largely self-clean in rain.
- Membrane & seams — check for abrasion, coating wear and seam lifting at the corners and edges.
- Cable tension — a first re-tension after the initial season, then a periodic check.
- Steel & connections — inspect the galvanising and the connections at ground level.
- Drainage — keep the low points, gutters and outlets clear before the monsoon.
Custom fabric structures we’ve built
Each project is documented with site photographs and recorded scope on its own page.
Retail · Radial courtyard roofVasant Square MallVasant Kunj, New Delhi
Public · Atrium skylightsGuwahati Tensile StructureGuwahati, Assam
Commercial · Interior membrane ceilingSmartworksNoida, UP
Public · Courtyard shadeHazratbal DargahSrinagar, J&K
Commercial · Conical entrance canopyTrustoneCorporate building
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Public · Conical courtyard shadeKolkata courtyardKolkata, West Bengal
Custom fabric structures FAQ
The questions people ask about a one-off tensile or membrane structure.
A one-off tensile or membrane structure that is form-found and engineered to a specific site, rather than adapted from a standard product — a free-form roof, a courtyard cover, an inverted umbrella, a membrane skylight, an architectural feature.
Yes — concept, form-finding, structural engineering, patterning, in-house fabrication of steel and membrane, and installation and tensioning are all done by the same team.
Yes. We take the architectural intent and geometry and develop it into a form-found, engineered, buildable structure, coordinating with the architect and the other consultants.
Whatever the project needs — PVC or PVDF for most work, PTFE-coated glass for permanence or a fire class, ETFE film where daylight is critical.
It depends on the size and the complexity. Fabrication and foundation work run in parallel, which keeps the on-site programme short, but the design and approval stage is longer than for a standard product.
From its own design — there is no rate card. Send the brief and the site and we come back with a concept and an itemised quote.
Yes — it is on engineered foundations with a galvanised steel frame. The membrane is replaceable at end of life, typically after 15–20 years for PVC and longer for PVDF or PTFE.
Send us the brief and the site
You get a concept, a form-finding direction and an itemised quote.
Let’s Build Your Structure
Speak directly with our structural engineering team to discuss your project dimensions, material options, or to schedule a free on-site technical inspection across India.
Direct Phone & WhatsApp Hotlines
+91 98102 37952 (Delhi HQ) / +91 93159 45187 (Bangalore) / +91 82879 92289 (Engineering)
Official Email Address
Delhi Factory & Administrative HQ
No. 367 Badam Singh Market, Rangpuri, Near Shiv Murti, NH-8, New Delhi 110037
Bangalore Regional Office
93/5, Kada Agrahara Village, Dodda Gubbi Post, Bangalore, Karnataka - 560077, India
Chattarpur Office
House No. 488, 3rd Floor, Khasra No. 60, 100 Futa Road, Opposite Delhi Jal Board, Near Diwan Bajaj Showroom, Chattarpur Pahari, New Delhi - 110074, India
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