Modular construction panel

MASTER-MODUL panels are continuous production line prefabricated panels, and are composed of two faces of prepainted galvanized steel, bonded to a core of rigid polyurethane (PUR) or polyisocyanurate (PIR) foam, forming a sandwich type element with tongue and groove joints.

MASTER-MODUL panels are specially designed for use in modular constructions, prefabricated housing, false ceilings and interior partition walls.

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MASTERPANEL offers various different configurations according to the project they will be used in, it comes in three different thicknesses, five outer ribbing designs and three inner ribbing designs, as well as a wide range of available colours. Additionally, MASTERPANEL also offers the option of panels manufactured with PIR (polyisocyanurate) self-extinguishing foam with a B-s1, d0 certification under Euroclasses (UNE-EN 13501).

Technical specifications

Panel thickness 35, 40, 50 mm.
Cover Width 1.000mm
Length Up to 16,000 mm. (max. recommended 9,000 mm)
Field of application Modular Construction
Outer face thickness: 0,4 / 0,5 / 0,6 / 0,7 mm
Inner face thickness: 0,4 / 0,5 / 0,6 / 0,7 mm
Coatings (see section on Finishes):
  • Polyester 25um
  • PVDF 25um/35um
  • PU 55um (Granite® HDX/PUPA 55)
  • Imitation wood (inner face)
  • PET (foodsafe)
Outer ribbing Standard / Lined / Flat / Micro-rib / Micro-lined
Inner ribbing Standard / Flat / Micro-lined
Core type
  • Polyurethane (PUR)
  • Polyisocyanurate (PIR)
Core Density 40kg/m³
Tensile strength >0,060Mpa
Compressive strength >0,100Mpa
Flexural strength >0,100Mpa
Reaction to fire Cs3d0 / Bs1d0

Dimensions in mm.

Joint detail
Panel thickness Weight Thermal transmittance (U-value) Thermal resistance (R-Value)
mm kg/m2 w/m2 k kcal/m2 h ºC m2k/w Hr f² °F/BTU
35 8,96 0,66 0,56 1,53 8,65
40 9,16 0,57 0,49 1,76 9,96
50 9,55 0,45 0,38 2,24 12,72

Calculations according to EN14509, measuring the surface resistance according to horizontal flow and omitting the influence of the profiled faces. Losses in bolted connections must be calculated by the designer.


  • Efficient thermal insulation capacity
  • High mechanical strength
  • Exceptional dimensional stability
  • Watertight against water vapor
  • Resistant to aggressive environments
  • A versatile material that allows any configuration
  • Quick to install and easy to maintain (easy to clean)
  • Easily removable and can be reused
  • Made-to-measure, avoids waste
  • Made with recyclable materials


Permissible overloads (kg/m2)

Panel thickness
(L) Span distance in cm. Calculations made on 0.50 mm / 0.50 mm panel.
150 175 200 225 250 275 300 325 350 375 400
35 207 162 129 104 84 69 58 48
40 245 193 155 126 103 85 71 60 51
50 284 226 182 149 123 102 86 73 62 53 46

Evenly distributed pressure overload for 1 span (2 supports).
Calculated for a Service Limit State of deformations L / 200. According to EN14509.
Overloads not factored. The designer must carry out the calculations in accordance with the applicable regulations.

Colour chart

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  • Colours in this catalogue are approximate.
  • Possibility of manufacturing in other colours on request.

Guide to select the right finish

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In order to choose the right prepainted finish for each use, the planner responsible for the design of the project must take into account both the incidence of UV rays and the exposure to corrosive environments of the building or project.

  • Corrosion resistance of the paint system To determine the corrosion resistance of a paint system, it is subjected to the salt spray test. This test evaluates the appearance of corrosion after a number of hours in a saline mist chamber. The results provide each paint scheme with an RC corrosion resistance value, from RC1 to RC5, with RC1 being the lowest value. This means that those RC3 rated paint schemes have shown their suitability for environments rated C3 or lower.
  • Resistance to UV radiation of the paint system To determine the UV resistance of a paint system, it is subjected to the QUV accelerated aging test. This test evaluates the loss of gloss and colour over time due to UV rays. The results provide each paint scheme with a UV resistance value RUV, from RUV1 to RUV4, with RUV1 being the lowest value.
  • Classification of environments DESCRIPTION
C1 Very low
C2 Low: Areas with low level of contamination. Mainly rural or industrial areas without incidence by sulphur dioxide.
C3 Moderate: Urban and industrial areas with low sulphur dioxide (SO2) pollution and coastal areas with low salinity (from 10 km to 20 km from the sea).
C4 High: Industrial areas with moderate contamination by sulphur dioxide (SO2) and coastal areas with moderate salinity (from 3 km to 10 km from the sea).
C5 I Very high: Industrial areas with very aggressive atmospheres and high contamination by sulphur dioxide (SO2)
C5 M Very high: Coastal and maritime areas with high salinity (from 1 km to 3 km from the sea).

Area 1: Areas not exposed to UV radiation. Indoor use without any radiation.
Area 2: Areas with low exposure to UV radiation or without special colour maintenance requirements.
Area 3: Areas with moderate exposure to UV radiation.
Area 4: Areas with high exposure to UV radiation or with special colour maintenance requirements.

Choice of finishes for different environments

Once the category of the environment is known, the person responsible for the design must decide on the painting system:

1) The suitable paint system needs to be determined in terms of corrosion. The following table can be used as a guide.

2) The suitable paint system in terms of UV radiation have to be determined. The following table can be used as a guide.

3) A suitable paint system should be chosen in terms of both corrosion resistance and UV resistance. The following cases can be used as a guide.

The data stated in the tables is informative and does not constitute a guarantee of the material. You should contact Masterpanel about any applications which require a guarantee for the steel in the panels.


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Standard finish: Polyester 25 um. Other finishes available on request. Guide values to be taken as a reference. Consult for guarantees.

In order to provide you with information about this product, we offer you all the documentation concerning Master -Modul / Modular Construction Panel.

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Technical specifications
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Quality certificate
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Certificates of reaction to fire

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MasterPanel offers our clients a technical department to support your designers and Project Management. Our building system section provides support from the initial concept of the project to the installation and subsequent maintenance.

This advice may include:

  • Proposals for appropriate technical solutions for each project.
  • Providing support regarding the cutting, quantifications of the panels and necessary accessories.
  • Support and technical information for the training of fitters.
  • We provide plans and sketches of the most common technical details.
  • Technical support in the correct installation of our panels, forming a team with the Project Management
  • Panels must always be transported on flatbed vehicles.
  • Panels will always be packed with polystyrene blocks at the base to avoid damage.
  • Panel stacks should never exceed 2.60 m. high (including polystyrene blocks, accessories, cover caps, trims, etc).
By truck
In containers
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