Atrium tensile structures, also called atrium tensile roofs, atrium membrane roofing or courtyard fabric covers, place a tensioned fabric roof over an open void, internal court or central plaza within a building. Steel frames, masts or cables support the membrane across the opening. The roof provides overhead cover while the fabric selection affects the daylight reaching the space below. At malls, hotels, offices, colleges and hospitals, the design needs to work with the surrounding building, the intended use of the atrium and the available support locations.
ShadeCo India Private Limited is an atrium tensile structure manufacturer and supplier in India. We design, fabricate, supply and install curved atrium membrane roofs, hypar and conical atrium canopies, courtyard tensile covers, skylight shade membranes and large-span fabric roofing, both for new buildings and for existing courtyards that need a roof added later. For an existing building, the roof brief also needs to account for how the new structure will meet the surrounding construction.
An atrium roof has to work with the building around it. Before choosing a shape, we look at the size of the opening, whether the surrounding slabs, beams or parapets can carry the roof's load, how rainwater will leave the roof, and how much daylight and air the space underneath should get. Access is planned early too, because the frame and fabric often have to be lifted into place over a building that is already occupied.
Atrium Tensile Structures at a Glance
- Structure Types: Curved membrane roofs, hypar, conical, courtyard covers, large-span fabric roofs and custom designs
- Fabric: Waterproof PVC or PVDF-coated polyester membrane that admits diffused daylight
- Frame Material: MS or GI steel arches, masts and trusses, galvanized or powder-coated, with steel cables and corrosion-resistant connections
- Expected Structural Service Life: 25–30 years, with proper material choice and periodic inspection
- Suitable For: Shopping malls, hotels, office buildings, colleges, hospitals, resorts and public plazas
- Service Area: Design, supply and installation across India
Why Atriums and Courtyards Need a Tensile Roof
An open atrium is often the best-located space in a building and the least used. In summer the floor of the court takes direct sun for hours and the surrounding corridors heat up, and in the monsoon rain falls straight in, so the space has to be left empty and the floor drains have to cope with every storm. Dust and leaves settle on the floor and on the balconies around the void.
Closing the opening with concrete or a heavy metal roof would cut off the daylight that makes the atrium pleasant in the first place. A tensile membrane solves this differently. It is light enough to sit on the existing structure in many cases, it spreads daylight evenly instead of letting in hard sun patches, and its curved form becomes a feature of the interior. The covered court can then be used for seating, events, food courts, exhibitions or simply as a sheltered route through the building.
Types of Atrium Tensile Structures
The form of an atrium roof is chosen by the shape of the opening, its span, the points where the roof can be supported and the look the architect wants inside.
Curved (Barrel) Atrium Membrane Roof
Fabric is stretched between a series of steel arches that run across the void. This form suits long, rectangular atriums in malls, offices and institutions, and it carries rainwater neatly to gutters along the two long edges.
Hypar Atrium Canopy
A hypar has two high corners and two low corners, which gives the fabric a saddle shape. It is efficient to tension, looks dynamic from below and works well over square courts or as a group of panels covering a bigger area.
Conical Atrium Canopy
The membrane rises to a peak around a central mast or a ring held from above. It suits circular and compact atriums and central plazas, and the raised centre gives the space a tall, open feel.
Courtyard Tensile Cover
Sail-like panels are fixed between the walls or columns of an open courtyard, sometimes at different heights. They suit hotel, school, office and hospital courtyards where some air movement at the edges is welcome. See also our courtyard tensile structures.
Large-Span Fabric Roofing
Large atriums, mall courts and event halls are covered with a cable or truss-supported membrane that crosses the full width without columns standing in the floor area. Spans of this size generally call for a heavier membrane of 1050 GSM or above. Drainage and maintenance access are planned for the whole roof from the start.
Custom Atrium and Skylight Membrane
Domed ceilings, irregular voids and skylights that need a shade layer are handled with custom designs. A membrane can also be hung under an existing glass skylight to cut glare and heat in the space below. For a transparent option, see our ETFE membrane structures.
Custom Atrium Roof Design: Building Interface, Daylight and Drainage
The building interface is the starting point. Many atrium roofs are fixed to the existing parapets, edge beams or columns around the void, so our engineers first check what load those members can take. Where they cannot carry the roof, we use independent columns or a perimeter frame that brings the load down to its own foundations. Connections are detailed so the membrane can move slightly under wind without pulling on the building finishes.
Daylight and airflow are planned together. A light-coloured coated fabric spreads soft light across the court, and a gap left between the membrane edge and the parapet lets warm air escape at the top so the space does not trap heat. Rainwater is the other key point: the roof is shaped so water runs to defined low points, into gutters and downpipes on the building roof, never onto the balconies or into the atrium itself.
PVC vs PVDF Fabric for Atrium Roofs
An atrium roof must close the opening against rain, so it is always built with a coated membrane. Both PVC and PVDF let soft daylight through; they differ mainly in upkeep, warranty and cost.
| Feature | PVC-Coated Polyester | PVDF-Coated Polyester |
|---|---|---|
| Closes the Atrium to Rain | Yes, waterproof membrane | Yes, waterproof membrane |
| Light Below the Roof | Soft, diffused daylight | Soft, diffused daylight |
| Upkeep at Height | Needs periodic washing from above | Dirt-resistant top coat means less frequent cleaning |
| Fabric Warranty | Depends on grade | Up to 10 years |
| Cost | Lower | Higher |
| Best For | School, office and hospital atriums on a controlled budget | Mall and hotel atriums where the roof is hard to reach for cleaning |
Technical Specifications
The table gives a general reference for architects, structural consultants and developers. Exact frame sizes, cable layout, fabric grade and fixing details are fixed for each atrium after a site survey and a check of the existing structure.
Structural & Fabric Specifications
| Specification | Details |
|---|---|
| Structure Types | Curved, Hypar, Conical, Courtyard Cover, Large-Span or Custom |
| Frame Material | Mild Steel (MS) or Galvanized Steel (GI) |
| Surface Finish | Galvanizing or Powder Coating |
| Tensioning System | Steel Cables, Edge Fittings and Adjustable Tensioning Hardware |
| Fabric Types | PVC-Coated Polyester or PVDF-Coated Polyester |
| Fabric Weight | 750 – 900 GSM for compact courts and skylight shade layers; 1050 GSM or heavier for wide, column-free atrium spans |
| Rain Protection | Waterproof membrane closes the atrium to rain |
| UV Protection | Up to 98% UV blocking, depending on the fabric |
| Temperature Resistance | −30°C to +70°C |
| Support Arrangement | Fixed to Existing Structure, Independent Columns or Perimeter Frame |
| Span and Roof Height | Set by the atrium opening and building levels (Customizable) |
| Drainage | Defined low points with gutters and downpipes to the building roof |
| Wind Load Design | As per IS 875 (Part 3), based on site location and roof height |
| Fabric Warranty | Up to 10 years on PVDF fabric, subject to manufacturer's terms |
Key Features
| Feature | Details |
|---|---|
| Waterproof PVC / PVDF Fabric | Seals the atrium opening so the court below can be used in the monsoon |
| UV-Resistant Coating | Blocks up to 98% of UV rays, depending on the fabric, while still admitting daylight |
| Anti-Wicking Fabric | Coated edges stop water travelling into the fabric at clamps and parapet joints |
| Fungicide Finish | Resists mould on the underside, which stays in view from every floor of the atrium |
| Moisture and Corrosion Resistant | Galvanized or powder-coated steel, cables and fittings for long exposure on the roof |
| Dirt-Resistant Top Coat | PVDF top coat reduces how often a hard-to-reach roof needs washing |
| Flame-Retardant Grade Available | FR-grade membrane can be supplied on request for malls, hotels and other enclosed public spaces |
| All-Weather Performance | Frame, cables and fixings designed for wind uplift at roof level as per IS 875 (Part 3) |
Benefits of Atrium Tensile Structures
A tensile roof turns an exposed court into floor area the building can actually use, without losing the light that makes an atrium worth having.
- Usable Space All Year: The covered atrium can host seating, events or food counters in summer heat and monsoon rain.
- Soft Natural Light: Coated fabric spreads daylight evenly, which can reduce glare and the need for daytime lighting.
- Wide Span, Few Supports: Arches, masts or cables cover the opening with little or no column clutter on the floor.
- Light on the Building: A membrane roof weighs far less than a slab or a heavy metal roof, which helps when adding a roof to an existing structure.
- A Feature Ceiling: Curved, conical or domed membrane forms become a visual focus seen from every level.
- Cleaner Interiors: Less rain, dust and leaves enter the court and the balconies around it.
Applications of Atrium Tensile Structures
Shopping malls use atrium membrane roofs over central courts that host promotions, seasonal displays and food courts, and office buildings roof their internal courtyards to create breakout areas, cafeterias and covered links between wings. Hotels and resorts cover lobby courts, banquet pre-function areas and central gardens so they can be used in any weather.
Colleges, schools and hospitals cover open courts that serve as assembly spaces, waiting areas or shaded links between blocks. Public plazas, exhibition centres and clubs use larger fabric roofs for gatherings and events, and many building owners also hang a shade membrane under an existing glass skylight to control heat and glare.
Atrium Tensile Structure Price in India: What Affects the Cost
The biggest factors in the cost of an atrium tensile roof are the area of the opening and its span. A small conical canopy over a compact court needs far less steel, cable and fabric than a column-free membrane across a large mall atrium.
Price also depends on the fabric grade and roof form. We check whether the roof can sit on the existing structure or needs its own columns and frame. The working height, crane or scaffolding needed, gutters and downpipes, FR-grade fabric if required, and project location all affect the quotation. Adding a roof to a working building may also require work at night or in phases. These working arrangements affect the schedule and need to be considered when planning the installation.
To receive a quotation, please share the atrium dimensions, the height of the surrounding parapet or roof level, building drawings if available, photographs of the void from above and below, and the site address.
How We Design and Install an Atrium Tensile Structure
Atrium roofs are built at height above spaces where people are often still working, so our method focuses on safe lifting, access from the roof and protection of the floor below.
- Step 1 – Survey and structural check: We measure the opening and the levels around it, and review the parapets, beams or columns the roof may be fixed to.
- Step 2 – Form finding and drawings: The roof shape, support points, fabric and drainage layout are worked out and shared as drawings for approval.
- Step 3 – Engineering: Steel members, cables, connections and any new foundations are designed for the span and the wind load at roof height as per IS 875.
- Step 4 – Fabrication: The steelwork is cut, welded and finished in our workshop, and the membrane is patterned, cut and joined to the approved shape.
- Step 5 – Lifting and installation: The atrium floor is protected, the frame is lifted and fixed, and the membrane is spread, connected and tensioned from above.
- Step 6 – Final checks and handover: We check tension, seams, gutters and fixings, test water flow off the roof, and explain how to inspect and clean the membrane.
Atrium Tensile Structure Design and Installation Solutions
From small internal courts to long mall voids, ShadeCo India builds atrium tensile roofs for offices, hotel courtyards, campuses and existing glass skylights. Membrane patterning, steel fabrication and site erection are all carried out by our own team.
Why Work with ShadeCo India
Established in 2010, ShadeCo India carries ISO 9001:2015 certification and has worked on membrane roofs and tensile structures for more than 15 years. Over that time, our in-house engineers, fabricators and installers have learned how to fit membrane roofs onto existing buildings, which is where most atrium projects become difficult.
Our clients across India include Delhi Public School, Food Corporation of India, L&T, TATA, Adani, Al-Karim University, Indian Oil, Omaxe, VIVO, Lakhani, Indian Railways, Reliance and several other organizations.
For atrium work, we agree support points and load paths with the building's structural consultant before fabrication begins, and we plan lifting and access so that the rest of the building can keep running. Each roof is inspected against the approved design before handover, and delivery typically takes 3–6 weeks, depending on size and complexity.
If your project also needs a different kind of cover, take a look at our polycarbonate roofing, courtyard tensile structures, ETFE membrane structures and the wider range of tensile structures.
Explore Our Projects & Design References
The images below bring together membrane roofs we have built in different shapes, including arched, circular and terrace-level forms that translate well to atrium and courtyard voids. They can help you and your architect agree on a roof profile early. Browse the full ShadeCo India project gallery.
Service Availability Across India
ShadeCo India provides atrium tensile structure solutions across major cities and regions in India, including Delhi NCR, Gurgaon, Noida, Mumbai, Pune, Bengaluru, Hyderabad, Chennai, Kochi, Coimbatore, Ahmedabad, Surat, Vadodara, Jaipur, Lucknow, Chandigarh, Indore, Bhopal, Kolkata and Guwahati, along with other locations based on project scope and site requirements.
Every atrium project is planned around the existing structure, the roof height, crane and scaffold access, local rainfall and wind, and the hours when work over the court is possible. ShadeCo India can design, fabricate, supply and install atrium roofs for malls, hotels, offices, colleges, schools, hospitals, resorts and public buildings.
Planning an Atrium Tensile Structure?
If you intend to roof an atrium, internal court, courtyard or skylight in a mall, hotel, office building, educational campus or hospital, ShadeCo India can assist with the roof form, membrane selection, support arrangement and installation method.
Kindly provide the atrium size, the surrounding roof or parapet level, any available structural drawings, photographs of the void and the project location. Our engineers will study the information and propose an atrium tensile roof that suits the building, admits daylight and keeps the space below protected from the weather.
ShadeCo India may be contacted by telephone on +91-9873975818, by email at info@shadecoindia.com, or through our contact page.
FAQ
Frequently Asked Questions - Atrium Tensile Structures
An atrium tensile structure is a tensioned fabric roof built over the open void or internal court of a building. The membrane is supported on steel arches, masts or cables, so it can cover a wide opening with few supports, keep out rain and strong sun, and still let soft daylight into the space below.
The cost is worked out per project. It depends mainly on the atrium area and span, the fabric grade, the roof form, whether new columns or a frame are needed, the working height, crane or scaffolding, drainage and the location. Send ShadeCo India the atrium size, roof level and photographs for a quotation.
Yes. Light-coloured PVC or PVDF membrane lets diffused daylight through, so the atrium stays bright without hard sun patches or strong glare. The amount of light depends on the fabric and its colour, and ShadeCo India can suggest a membrane based on how bright the space needs to be.
Yes, in most cases. Because a membrane roof is light, it can often be fixed to the existing parapets, beams or columns around the void once our engineers have checked their capacity. If the structure cannot take the load, the roof is carried on its own columns or perimeter frame.
The membrane is shaped so rain runs to fixed low points, where gutters and downpipes take it to the building's roof drainage. PVC and PVDF fabrics are waterproof, and edges and joints are detailed so water does not fall onto the balconies or into the atrium. The frame is also designed for wind load as per IS 875 (Part 3).
The steel frame has an expected structural service life of 25–30 years with periodic inspection. PVDF membrane comes with a warranty of up to 10 years, subject to the manufacturer's terms; the life of PVC membrane depends on the grade used.
Most projects are delivered in 3–6 weeks, depending on the atrium size and how custom the roof is. The time covers design approval, fabrication and installation, and work over an occupied building can be phased so the rest of the premises stays in use.
Cleaning is done from the roof side, using plain water and a gentle detergent on the top surface, and leaves or debris are cleared from gutters before the monsoon. A PVDF top coat keeps the fabric cleaner for longer. Tension, cables and fixings should be checked periodically, and ShadeCo India offers annual maintenance contracts for this work.
