SIPs panel buildings with EPS and PIR cores
Strong, airtight, highly insulated walls, floors and roofs, made from factory-cut structural insulated panels.
How the system works
A structural insulated panel (SIP) is a sandwich of rigid insulating foam bonded between two structural facings. The panel itself carries the load, so there's no separate frame to build and insulate. Walls, floors and roofs are cut to size in the factory, numbered, delivered and fitted together on site.
We offer SIPs with two core types. EPS (expanded polystyrene) is light and economical. PIR (polyisocyanurate) insulates better for its thickness, so walls can be slimmer for the same performance, and it chars rather than melts in a fire. We'll recommend the right core for your budget, design and climate.
Typical specification
- Panel make-up
- Foam core bonded between two structural facings
- Core options
- EPS (expanded polystyrene) or PIR (polyisocyanurate)
- Facings
- OSB, magnesium oxide (MgO) board or steel, chosen to suit the climate
- Typical panel thickness
- Around 100–250 mm
- Typical core conductivity
- EPS 0.032–0.038 W/m·K, PIR 0.022–0.026 W/m·K
- Used for
- Walls, floors and roofs, up to multi-storey with engineering
Typical values. Exact specifications depend on the product and your project.
Key benefits
Why clients choose this system.
Excellent insulation
A continuous insulated envelope with few thermal bridges keeps buildings cooler and cuts air-conditioning costs.
Fast to build
Panels arrive cut to size and numbered, so the structure goes up in days rather than weeks.
Airtight and quiet
Fewer joints mean less air leakage and less outside noise.
Strong and light
Panels act as a structural skin, giving high strength for their weight.
Accurate
Factory cutting means straight walls, square corners and less waste on site.
Design freedom
Suits modern homes, villas and studios, with large openings where engineered.
Things to consider
Every system has trade-offs. Here's what we'll talk through with you.
Moisture and termites
In Indonesia's humid climate, facings, detailing and termite protection need to be specified correctly. MgO board or steel facings are a good choice for tropical sites.
Fire performance
EPS is combustible and needs protective linings. PIR performs better, and fire-rated boards can be added where regulations require.
Changes after build
Cutting new openings later needs care, so it pays to fix the layout at design stage.
From our gallery
A selection of recent enVision buildings.
What we build with this system
The services where this system is often a good fit.
Residential Modular Buildings
Single-storey homes, multi-family residences and custom designs, built faster than a traditional house.
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Modular Holiday Homes & Villas
Premium villas and cabins for resorts, private estates and holiday rentals.
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Modular Garden Buildings
Garden offices, studios and storage buildings that add space without a long build.
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Built in the factory. Finished on your site.
Built in sections
Each module is made in a controlled factory environment, away from the weather, with strict quality control.
Delivered to site
Finished sections are transported to your site while the groundwork is prepared.
Assembled into one building
Modules are joined into a single, cohesive structure, with site work completed in as little as four weeks.
SIPs panel system: questions answered
What does SIPs stand for?
Structural insulated panels: rigid foam insulation bonded between two structural facings, used for walls, floors and roofs.
Should I choose EPS or PIR?
EPS is lighter and more economical. PIR insulates better for its thickness, allowing slimmer walls, and performs better in a fire. We'll recommend the right core for your project.
Are SIPs suitable for Indonesia's climate?
Yes, when correctly specified. Good insulation keeps buildings cooler, and moisture-resistant facings such as MgO board or steel, plus termite protection, suit tropical conditions.
How many storeys can be built with SIPs?
Single and two-storey buildings are common, and taller buildings are possible with structural engineering.
Other modular solutions
- Light gauge steel (LGS)Precision-made galvanised steel frames that won't rot, warp or attract termites, for homes, extensions and commercial buildings.
- Ready modules from ChinaFactory-finished modules sourced from China, shipped to Indonesia and installed on your site. A cost-effective route for camps, offices and housing.
- Flat-pack & expandable container housesContainer-sized units shipped flat or folded, then assembled or unfolded on site in a short time. Ideal for site offices and temporary camps.
- Shipping container buildingsConverted steel shipping containers for cafes, retail, offices, studios and homes with a strong industrial look.
- Composite sandwich panel buildingsSteel-faced insulated panels with PU/PIR, EPS or rockwool cores. Our system for mine camps, warehouses and site buildings.
- Volumetric modules & podsComplete room-sized modules and bathroom pods, finished in the factory, from the CORE module to living PODS.
Is this system right for your project?
Tell us what you're planning and we'll recommend the best modular solution for your design, budget and site.