Profile 6 - Fibre Cement Roofing Sheets

High performing roofing and cladding sheet for all types of agricultural and commercial buildings

  • We are the only British manufacturer with the largest product range 
  • Our Semi-Compressed sheets are highly absorbent minimising condensation
  • Naturally breathable improving ventilation and sheet effieciency
  • Excellent acoustic and thermal insulation properties over metal
  • Rust, rot and corrosion resistant with a 50yr life expectancy

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Overall width


Net covering width



(nominal) 6.7mm

Minimum density


Pitch of corrugation

(nominal) 146.5mm

Depth of profile


Profile height category


Side lap


Maximum end lap


Minimum end lap


Maximum purlin centres


Maximum rail centres


Maximum unsupported overhang


Approx weight of roofing

As laid with 150mm end laps: single skin including fixings: 17kg/m²

Minimum roof pitch

Painted and Natural Grey lengths (mm) - P6: 1220, 1375, 1525, 1675, 1825, 1975, 2125, 2275, 2440, 2600, 2750, 2900, 3050
Painted and Natural Grey lengths (mm) - P3: 1525, 2450, 3050
Farmscape lengths (mm): 1525, 2450, 2900
Anthracite lengths (mm) - P6 only: 1525, 1675, 2440, 2750, 2900, 3050
Approximate covering capacities for estimated purposes:
1375mm purlin spacing, normal side lap, 150mm end lap: approx. 1.13m² of material covers 1.0m²
1375mm purlin spacing, normal side lap, 300mm end lap: approx. 1.19m² of material covers 1.0m²

Impact resistance
The test for fragility of roofing assemblies’ ACR (M) 001: 2005 consists of a 45kg bag being dropped from a height of 1200mm onto a fixed sample of roofing. It is intended to provide information about whether the roof can support the instantaneous loads imposed on it by persons stumbling or falling onto it. A roof is classified as fragile if the bag passes through the roof assembly.

If the bag is retained on the test assembly and no other drop tests are carried out, the assembly shall be classified as Class C non-fragile assembly. Profile 6 sheets meet this requirement.

Sound insulation
When tested in the critical frequency range of 100-3150Hz, Marley profiled sheeting achieves the following mean airborne sound reduction:
Profile 6 single skin 26 decibels

Breaking strength
The minimum breaking strength for Profile 6 sheets is defined under BS EN 494. The minimum against grain breaking load (purlin to purlin) for Profile 6 is 4250N/m. The minimum with grain bending moment at rupture (ridge to ridge) for Profile 6 is 55Nm/m.

Installed weight
The approximate installed dry weight of single and double skin profiled sheeting with fixings and the required side and end lap is as follows:
Profile 6 single skin 17.0kg/m²

External fire exposure: the sheets have a P60 (external SAA) rating to BS 476: Part 3: 1975, and can be classified Class 0 in accordance with the Building Regulations.

Water tightness
Fibre cement complies with BS EN 494: Clause 5.3.4.

Moisture content
When new, fibre cement sheeting has a relatively high moisture content. If humid conditions prevail, damp patches (without formulation of droplets) may appear on the underside of the sheets. This phenomenon is in no way detrimental to performance, and will disappear within 12 months, in the course of natural exposure.

Condensation control
Whilst Profile 6 is watertight, it has the ability to absorb up to 25% of its dry weight in moisture and dissipate it in more favourable conditions. This material characteristic has a significant effect in reducing condensation occurrence.

Effects of chemicals
Over the years chemical and industrial atmospheric pollution will cause a slight softening of the surface of natural finish fibre cement sheets. The acrylic paint finish provides added protection against many acids, alkalis and solvents normally found in the atmosphere.

Where fibre cement is to be used in particularly aggressive atmospheres, with higher than normal concentrations of acids, alkalis, fats or salts, please contact the Technical Department for advice.

Marley profiled sheets are vermin and rot-resistant, but lichen may grow on the outer surface. For advice on removal, please contact the Technical Department.

Effects of low and high temperature
Marley profiled sheeting is designed to be minimally affected by frost or climatic temperature changes.

For buildings in which higher than normal temperatures occur, or in areas which are expected to be subjected to sudden changes in temperature, special considerations may be necessary. (Consult the Technical Department for recommendations).

Thermal and other movements
The amount of movement is negligible, but it is necessary to provide movement joints in association with the structural framework. (For details of movement joints, please see the Profiled Sheeting Design Guide) The co-efficient of linear expansion for profiled sheeting is 8 x 10-6m/mK.

Thermal conductivity
Marley profiled sheeting has only low thermal conductivity when compared with other sheet roofing products. This serves to reduce heat build up in summer and heat loss in winter.

Thermal conductivity (k) = 0.48W/mK.

Thermal transmittance (U value)
When constructed as detailed in this compendium, all insulated systems will exceed a U value of 0.25W/m²K. (This is the standard U-value required by Building Regulations Approved Document L2 for roofs with integral insulation on buildings other than dwellings.)

Marley profiled sheeting may be regarded as having a normal life of at least 50 years, but the durability of the fixing accessories should be taken into account.

Atmospheric pollution is not normally sufficiently concentrated to be harmful. Measures should be taken to prevent corrosion of the fixing accessories, e.g. by the use of plastic washers and caps.

Marley profiled sheeting is resistant to most forms of atmospheric attack but with age becomes less elastic and a small deflection will be experienced, which may make it less resistant to impact. Its transverse strength, however, is maintained


Country of production Meldreth, UK
Environmental management 14001
Quality management 9001
Health and safety management 18001
LCA study Can achieve an A+ rating in the BRE Green Guide to Specification
Energy Manufactured using a continuous lamination process into moulding sheets which are heat cured.
Raw materials Cement, dilica, fibres, pigments and fillers
Lifespan 50 years plus dependent on weather and regional application use
Recyclability Can be crushed and used in cement manufacture

Profile 6 is a high strength semi-compressed fibre cement corrugated roof sheet with polypropylene reinforcement strips inserted along precisely engineered locations that run along the length of the sheet. This provides maximum impact strength without affecting the durability of the product.

Profile 6 has a very broad appeal. It is designed for roofs of 5° pitch and over and for vertical cladding in both single skin and insulated constructions.

A comprehensive range of accessories is available and apart from the natural grey finish, sheets and accessories can be supplied in a wide range of colours.


Advantages of Marley Fibre Cement Profile 6

- Only UK manufacturer of fibre cement profiled sheeting

- Highly cost effective weather proofing

- Low maintenance profiled roofing sheet solution

- Does not rust, rot or corrode

- Resistant to chemical attack

- Excellent noise and thermal insulation

- Excellent sustainability credentials including A+ rating in the BRE Green Guide and BES 6001 'Very Good'

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Here at Marley Eternit, we are always on hand to offer practical and experienced support. Select an option below or call us on 01283 722588.