Choosing the correct Modek roof sheet for your application
Choosing the right MODEK product
MODEK manufactures a wide range of rooflighting systems that are suitable for any type of building, be it a home, a warehouse, a commercial building or a sporting facility.
• MODEK manufactures glass-reinforced polyester (GRP) and polycarbonate in a range of masses.
• As a rule, the heavier the sheeting, the longer its lifespan and the more adverse the weather conditions it will be able to withstand.
• MODEK is able to
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on which mass should be selected for a given application.
Domestic Household
MODEK recommends the use of glass-reinforced polyester (GRP) or polycarbonate sheeting for domestic applications such as roofing, carports, sun patios and garden sheds. Please consult our DIY brochure for more information before attempting any DIY project yourself.
| Material and mass | Purlin spacings | Weather conditions | Lifespan |
| GRP 1.1kg/m2 | 900mm | Moderate | 5–7 years |
| GRP 1.4kg/m2 | 1 000mm | Moderate | 10–15 years |
| Polycarbonate 0.8mm | 900mm | Moderate | 7–10 years |
| Polycarbonate 1.0mm | 1 000mm | Moderate | 10–12 years |
Light Industrial and Warehousing
MODEK recommends the use of glass-reinforced polyester (GRP) or polycarbonate sheeting for light industrial and warehousing applications such as roofing and rooflighting.
| Material and mass | Purlin spacings | Weather conditions | Lifespan |
| GRP 1.8kg/m2 | 1 500mm | Adverse | 10–15 years |
| GRP 2.4kg/m2 | 1 800mm | Hostile | 15–25 years |
| Polycarbonate 1.0mm | 1 000mm |
Moderate | 10–15 years |
| Polycarbonate 1.25mm | 1 500mm | Adverse | 12–15 years |
Mining and Heavy Industry
MODEK recommends the use of glass-reinforced polyester (GRP), polycarbonate or chemical resistant sheeting for mining and heavy industrial applications such as roofing, skylighting and cladding.
| Material and mass | Purlin spacings | Weather conditions | Lifespan |
| GRP 1.8kg/m2 | 1 500mm | Adverse | 10–15 years |
| GRP 2.4kg/m2 | 1 800mm | Hostile | 15–25 years |
| Polycarbonate 1.25mm | 1 500mm | Adverse | 12–15 years |
| Chemical resistant sheeting | 1 500mm | Cyclone | 15–30 years |
| Heavy-duty GRP (non-fragile roofing) | 2 100mm | Cyclone | 20–30 years |
Commercial and Recreational
MODEK recommends the use of glass-reinforced polyester (GRP) and polycarbonate sheeting for commercial and recreational applications such as stadium roofing and skylights and cladding on shopping complexes.
| Material and mass | Purlin spacings | Weather conditions | Lifespan |
| GRP 2.4kg/m2 | 1 800mm |
Hostile | 15–25 years |
| Polycarbonate 1.25mm | 1 500mm | Adverse | 12–15 years |
| Heavy-duty GRP (non-fragile roofing) | 2 100mm | Cyclone | 20–30 years |
