Services
Sandwich Panel Roof and Facade
Fast, insulated envelopes with PUR/PIR, rockwool or EPS filled composite panels.
About the system
A sandwich panel is a composite building element produced by pressing an insulation core between two metal facings on a continuous factory line. Because it combines load-bearing capacity, thermal insulation and weatherproofing in a single layer, it is used as a lightweight construction solution on the roofs and facades of buildings.
The core type of the composite system varies with the fire requirements of the project. Polyurethane (PUR) and polyisocyanurate (PIR), polystyrene (EPS), rockwool and glasswool make up these core types. PUR/PIR gives the best insulation in the thinnest section thanks to its low thermal conductivity, while rockwool-cored panels are preferred where non-combustibility is required.
Roof panels are usually produced with a five-rib profile and concealed or exposed fixing options, while facade panels come with flat, micro-ribbed or deep-ribbed faces and can be installed horizontally or vertically. Since panels are cut to project-specific lengths, site cutting and waste are minimised and installation is markedly faster than with conventional multi-layer envelopes.
Applications
- Production facilities and factory buildings
- Logistics warehouses and bonded stores
- Cold stores and food processing plants
- Commercial buildings, showrooms and service centres
- Schools, sports halls and social facilities
- Hangars, workshops and agricultural buildings
Installation process
- 01
Panel and core selection
The building's fire class requirement, target thermal transmittance, span and loading are assessed to determine the core type and panel thickness.
- 02
Site measurement and production plan
Grid dimensions are verified on site; panel lengths, cutting plan and installation sequence are prepared as a factory production list.
- 03
Sub-frame preparation
Levels, alignment and spacing of purlins and facade rails are checked; any required reinforcement or correction is completed before installation.
- 04
Installation
Panels are lifted with vacuum lifters or suitable slings, the interlock engagement is checked and they are secured with the appropriate fasteners.
- 05
Detailing and joint sealing
Ridges, eaves, corners, sills and opening surrounds are closed with flashings; joints are sealed with tapes and sealants.
- 06
Inspection and handover
Surface flatness, joint alignment, fastener counts and removal of the protective film are checked; the envelope is handed over with an inspection record.
Available materials
Which core suits which building?
The fire requirement is decisive. Rockwool-cored panels are used where non-combustibility is required and in warehouses with a high fire load. PIR offers better fire performance than PUR while still giving high insulation in a thin section. EPS is preferred for economical solutions in buildings with low fire requirements. The selection is always made together with the project's fire strategy and code requirements.
Sandwich panel or standing seam?
Sandwich panels give cost and programme advantages on rectangular, standard-pitch industrial buildings that must be closed quickly. Standing seam comes to the fore on curved or free-form geometries, on spans that need very long panels and where an architecturally clean, penetration-free surface is required. A project can also combine a standing seam roof with a sandwich panel facade.
What panel thickness is needed for a cold store?
Thickness is determined by the target internal temperature and the thermal calculation; a chill room and a blast freezer do not need the same build-up. The thickness is therefore given by a project-specific calculation, and joint sealing and vapour barrier continuity matter just as much as thickness itself.
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Learn moreIs this system right for your project?
Share your architectural design; we will respond within 48 hours with system selection and indicative pricing.