GRG shaped relief
Free-form plaster shapes with the strength to span and curve.
- Shanghai Xionglan Culture Communication Co., Ltd. (brand: Xionglan Art)
- Shanghai-based workshop · delivery in 67 Chinese cities
- 10 capability groups / 102 individual techniques · design, fabrication and installation in-house
- Phone +86 156 0163 6249 · Mon–Sun 09:00–18:00 (CST)
GRG is gypsum reinforced with glass fibre, which makes it far stronger than plain plaster and allows large, thin, curved sections. It is what we use when a shape has to wrap a column, bend around a corner or span an opening.
Commissioned work in grg shaped relief normally runs from 6 to 30 m², with 3–8 working days in production from approved drawings. The reference range for this technique is CNY 500–1600 per m², quoted itemised. It sits within our Gypsum Relief & Decorative Plaster capability, alongside 7 related techniques, and the 4-point deliverable below is what a commission includes as standard.
When grg shaped relief is the right answer - and when it is not
Glassfibre-reinforced gypsum gives complex, curved and large-scale interior form with the surface quality of plaster. It is chosen where the shape is beyond what conventional casting can achieve - flowing ceilings, organically curved walls, deep reveals - and where weight matters because the structure is already set. It is not a cheap material, so it makes sense on feature elements rather than as a bulk wall finish.
How the work is actually carried out
The form is modelled digitally, then a CNC-cut mould is produced so the curvature is accurate rather than approximated. Gypsum slurry is sprayed or laid up over glassfibre reinforcement to a controlled thickness, which gives the strength without the mass of solid plaster. Panels are cast, dried and trial-assembled in the workshop before shipping, so site work is assembly rather than fabrication. Joints are designed on a grid that follows the geometry, which is what makes the finished surface look seamless.
Typical applications
Typical specifications
| Typical size | Sections up to several metres, produced in pieces |
|---|---|
| Lead time | 3-6 weeks from approved 3D model |
| Weight | Roughly one-third of equivalent solid plasterwork |
| Finish | Paint, metallic or specialist decorative finish |
| Capability | Gypsum Relief & Decorative Plaster |
| Reference range | CNY 500–1600 per m² |
| Techniques in this capability | 8 |
| Coverage | Shanghai base, nationwide delivery, overseas projects on request |
Reference price bands for GRG shaped relief
Indicative only, based on the scope normally quoted for grg shaped relief. A firm price follows a site survey and an itemised quotation split into material, labour, finishing, packing and freight.
| Scope | Typical area | Reference total | Unit rate |
|---|---|---|---|
| Small area | 6–15 m² | CNY 3,000 – CNY 24,000 | approx. CNY 1600/m² |
| Standard area | 15–36 m² | CNY 7,500 – CNY 57,600 | approx. CNY 1050/m² |
| Large area | 36 m² and above | CNY 18,000+ | approx. CNY 500/m² |
Build tiers for grg shaped relief
GRG shaped relief is not one product at one size: the table below is the same scope ladder we quote on, so you can see where your project sits before asking for a price.
| Build tier | Typical area | Production days | What changes at this tier |
|---|---|---|---|
| Tier 1 | 6–30 m² | 3–8 | Up to 30 m², one substrate and one access setup, 3–8 days in the workshop. |
| Tier 2 | 6–30 m² | 3–8 | 6–30 m² across two or more faces, 3–8 days, substrate build-up agreed per location. |
| Tier 3 | 6–30 m² | 3–8 | 6–30 m² across two or more faces, 3–8 days, substrate build-up agreed per location. |
| Tier 4 | 6–30 m² | 3–8 | 6–30 m² across two or more faces, 3–8 days, substrate build-up agreed per location. |
| Tier 5 | 6–30 m² | 3–8 | 6–30 m² across two or more faces, 3–8 days, substrate build-up agreed per location. |
| Tier 6 | 6–30 m² | 3–8 | 6 m² and above, multiple substrate types and phased access, 3–8 days with a join and numbering plan. |
What we deliver
- Section drawings and 1:1 detail confirmation before mould-making
- Moulds, casting, curing and finishing in our own workshop
- Cornices, columns, arches, wall panelling, ceiling domes and coves
- Gilding, ageing and painted finishes matched to your scheme
Faults we see most often in grg shaped relief
Each of these is a field failure rather than a workshop one, and each is cheaper to prevent at enquiry stage than to correct after installation.
- Designing curves that look elegant in a render but cannot be built or transported in real panel sizes.
- Leaving the joint layout to site, which produces visible seams running across the most prominent part of the form.
- Skipping the trial assembly, so a dimension mismatch is discovered on the scaffold instead of in the workshop.
What to settle before an overseas project starts
| Digital model or dimensions | A 3D model is ideal. Without one, send a measured survey plus the intended geometry and we will build the model for approval. |
|---|---|
| Structural capacity | GRG is lighter than solid plaster but not weightless. Confirm the ceiling or wall's capacity and the fixing method available. |
| Services coordination | Lighting, sprinklers, detectors and air terminals all need fixing points inside the form. Coordinate before casting, not after. |
Working with us from overseas
Enquiry to installation, one point of contact. Export packing, shipping, commercial terms and quality control →
Design intent and what drives the cost
| Technique | GRG shaped relief |
|---|---|
| Positioning | Free-form plaster shapes with the strength to span and curve. |
| Floor area normally quoted | 6–30 m² per commission |
| Typical production window | 3–8 working days from approved drawings |
| Main cost drivers | Area and repetition; substrate preparation; detail and modelling time; surface finish; access and working hours |
| What we quote separately | Material, labour, finishing, packing, freight and site measures - each as its own line |
Representative work
Gypsum Relief & Decorative Plaster projects photographed on completion.
Gypsum Relief & Decorative Plaster — French-style plasterwork
Gypsum Relief & Decorative Plaster — project photograph
Gypsum Relief & Decorative Plaster — GRG sculpted ceiling
Gypsum Relief & Decorative Plaster — Ceiling dome & coveCommon questions
Do you need a 3D model to start?
Can GRG be installed on an existing ceiling?
Is gypsum relief suitable for bathrooms or exteriors?
Discuss grg shaped relief
Send photographs, drawings or a 3D file with approximate dimensions. You will get a technique recommendation, a reference price band and a production schedule.