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01384 273811

Hours of business:

Monday - Thursday 9am to 5pm

Friday 9am to 3pm, closed on weekends

Finishes

The table below shows a quick comparison of the main finishes.

PVC PlastisolPolyester paintEco Grey Paint1Galvanised steel
HD Zinc galvanised
Primer painted
Variety of colours
Many 5 Colours
Expected time to first maintenance 15 to 25 Years 10 to 15 Years 5 to 10 Years

1 to 5 Years

Scratch resistant
Anti-condensation liner available
Fade resistant 

1 Eco grey (alkyd primed steel) is not always readily available. When this material is available it will be displayed in our special offers category.
Please select a tab below for further finish information:

Galvanised steel sheets

Galvanised sheeting is a high quality hot dipped zinc coated steel with no additional finishes added. Now the base material for Polyester paint and PVC Plastisol coated roofing sheets, galvanised steel sheets have been used for over 100 years.

It is worth noting that galvanised steel will weather over time and become duller. Also galvanised steel can vary in finish and we highly recommend taking a coated sheet if colour is an issue.

As long as the material is fitted and treated properly then it can last a number of years, however the material is very susceptible to corrosion especially the steel underneath the zinc coating.

Galvanised steel sheets can sometimes be confused with stainless steel, however it is important to note these are different products.

Please be aware that galvanised sheets cannot be painted until they have weathered. This usually takes approx 6 months. If a more durable coloured finish is required please consider polyester painted or PVC plastisol sheets

Typical properties

PropertyUnit of measureValueTest standard
Standard zinc coating (g/m2) 275 (Z275)
Minimum yield stress (N/mm2) 220 (S220GD) EN 10147:2000
Bending and profiling quality DX51D EN 10142:2000
Estimated time to first maintenance*:
Dry and unpolluted
Suburban and rural
Industrial and urban
Coastal

(years)
(years)
(years)
(years)

20-50
5-10
2-5
1-5
General notes: *Recommendations for period to first maintenance are based on the premise that the strength and integrity of sheets would diminish after the period specified, unless maintenance was carried out. The periods estimated are based on a theoretical weight loss as a result of natural weathering under test conditions. All figures are estimates and do not constitute a guarantee period.

Steel gauges

0.5mm (24swg)

0.5mm is a lightweight gauge ideal for use on walls and smaller domestic and agricultural roofs. With a typical weight of only 4.8kg/m². 0.5mm gauge steel cladding is especially useful when weight is a concern. Please be aware that if you are planning to use 0.5mm gauge sheets on your roof then you must support the sheets more often2, typically every 0.6m (or 2ft).

0.7mm (22swg)

0.7mm steel cladding is the established standard for roofing applications with a typical weight of 6.8Kg/m². 0.7mm gauge can typically be supported2 every 1m.

Thicker gauges may be available in galvanised steel. Please contact us for further information.
2 Purlin spaces are guidelines only and may not be correct in every circumstance. We recommend you consult a structural engineer for final approval on purlin centres.

Polyester paint coated steel sheets

Polyester paint is a very useful for agricultural uses as it has been stated as an acceptable material by a number of agriculture authorities. Polyester paint is also a cheaper alternative for roofing than other materials available. Polyester is coated upon zinc-coated steel in accordance to BS EN 10147. This type of roofing has a medium lifetime and should be recoated every ten to fifteen years (or less if there is pollution).

When handling polyester painted sheets care must be taken as the polyester coating can easily be scratched. Also sheets should not be slid against each other as this can also cause wear in the surface coating.

Polyester paint coated sheeting is a very high quality galvanised steel sheet with a primer paint finished with a final layer of polyester paint.

Five standard colours

Galvanised substrate to BS EN 10346:2009 and primed undercoat offering excellent corrosion resistance

Typical properties

Finish propertyUnit of measureValueTest standard
Nominal organic coating thickness (µm) 25 EN13523-1
Specular gloss (60°) (%) 10-35 EN13523-2
Scratch resistance (g) 3000 EN13523-12
Abrasion resistance (Taber, 250 rev, 1kg) (mg) <30 EN13523-16
Flexibility (minimum bend radius) (T) 1.5 EN13523-5
Adhesion (%) 100 Pass EN13523-6
Corrosion resistance:
Salt Spray
Humidity

(h)
(h)

500
1000

EN13523-8
EN13523-25
UV Resistance Excellent EN10169
Fire classification A2 EN13501-1

General notes: The figures contained in this table are typical for the topcoat and solid colours and do not constitute a specification. Please be aware that polyester paint coated sheets are susceptible to light scratching during transport. We recommend ordering a tin of touch up paint with this finish. If a more durable finish is required please consider using PVC plastisol coated sheets

Steel gauges

0.5mm (24swg)

0.5mm is a lightweight gauge ideal for use on walls and smaller domestic and agricultural roofs. With a typical weight of only 4.8kg/m². 0.5mm gauge steel cladding is especially useful when weight is a concern. Please be aware that if you are planning to use 0.5mm gauge sheets on your roof then you must support the sheets more often2, typically every 0.6m (or 2ft).

0.7mm (22swg)

0.7mm steel cladding is the established standard for roofing applications with a typical weight of 6.8Kg/m². 0.7mm gauge can typically be supported2 every 1m.

2 Purlin spaces are guidelines only and may not be correct in every circumstance. We recommend you consult a structural engineer for final approval on purlin centres.

PVC Plastisol coated steel sheets

PVC Plastisol coated sheeting is a very high quality galvanised steel sheet with a primer paint and the PVC rolled onto it resulting in a very durable end product that doesn't fade or scratch easily.

Fire: When tested, Class 0 in accordance with building regulations BS476 part 6 1989 and Part 7 1987.

200µm durable, abrasion-resistant topcoat

Leathergrain embossed finish

Wide colour range

Galvanised substrate to BS EN 10346:2009 and primed undercoat offering excellent corrosion resistance

Manufacturers coating guarantee of up to 25 years to first maintenance*

* 20 years for coastal areas (some colours 10 to 15 years see colours for more details)

Typical properties

Finish propertyUnit of measureValueTest standard
Nominal organic coating thickness (µm) 200 EN13523-1
Gloss (60°) (%) 15-35 EN13523-2
Scratch resistance (g) 3500 EN13523-12
Abrasion resistance (Taber, 250 rev, 1kg) (mg) <12 EN13523-16
Flexibility (reverse impact) (J) ≥18 EN13523-5
Adhesion (cross hatch) (%) 100 Pass EN13523-6
Minimum bend radius (T) 0 T@16°C EN13523-7
Corrosion resistance:
Salt Spray
Humidity
(h)
(h)
1000
1000
EN13523-8
EN13523-25
Max continuous operating temp. (°C) 60
Reaction to fire Class 0 BS476 part 6 & 7
Resistance to fire Class AA BS476 part 3

General notes: The figures contained in this table are typical for solid colours and do not constitute a specification.

Steel gauges

0.5mm (24swg)

0.5mm is a lightweight gauge ideal for use on walls and smaller domestic and agricultural roofs. With a typical weight of only 4.8kg/m². 0.5mm gauge steel cladding is especially useful when weight is a concern. Please be aware that if you are planning to use 0.5mm gauge sheets on your roof then you must support the sheets more often2, typically every 0.6m (or 2ft).

0.7mm (22swg)

0.7mm steel cladding is the established standard for roofing applications with a typical weight of 6.8Kg/m². 0.7mm gauge can typically be supported2 every 1m.

2 Purlin spaces are guidelines only and may not be correct in every circumstance. We recommend you consult a structural engineer for final approval on purlin centres.

Polyester paint and PVC Plastisol coated sheets are also available with an anti-condensation liner added to the underside of the sheet.

Polyester Paint Coated Steel Sheets with Anti Condensation

PVC Plastisol coated steel sheets with anti con

This simple method of rolling a flock material to the underside of our box profile and corrugated sheets reduces the risk of condensation* and drastically cuts the cost associated with full insulated panels.

* Anti condensation requires good air circulation around the sheet to allow water held by the liner to evaporate away. If you are using foam fillers you should notch them out to allow air circulation. Minimum recommended roof pitch is 10° for liner to be fully effective.
Click on the video below to compare the effects of condensation on steel sheets with and without anti condensation liner:

Adding anti condensation liner to our roof sheets is a cost effective method of handling condensation problems in many buildings. If you believe that there is a chance of condensation we would highly recommend Dripstop anti condensation liner as an extremely effective solution.

Controlling condensation

When the temperature and humidity conditions in the building reach dew point, moisture will condense on the underside of an uninsulated metal roof sheet. If there is a lot of condensation, water droplets will form and start to fall. The traditional method for eliminating build up of condensation is to insulate the roof so that the temperature on the metal sheet never reaches the dew point.

Drip Stop anti condensation liner is pre rolled onto the sheet and will provide a much more cost effective solution than full roof insulation.

Advantages of anti condensation lined sheets

  • Save up to 25% on traditional solutions
  • Durability (Drip Stop anti-condensation felt liner is not susceptible to ripping, tearing or deterioration like standard insulation and vapor barriers are)
  • Easy to clean (with hose or pressure washers)

The Drip Stop solution

Roofing sheets lined with Drip Stop anti-condensation material provide a medium for trapping this moisture in the specially designed pockets formed in the membrane. Drip Stop holds the moisture until conditions go back below the dew point. The moisture is then released back into the air in the form of normal humidity.

Drip Stop is self adhesive felt liner that is applied to our sheets during the roll forming process. This means that the sheets will arrive with you with Drip Stop already in place, ready to be installed immediately. Your sheets are then installed as normal.

Steel gauges

0.5mm (24swg)

0.5mm is a lightweight gauge ideal for use on walls and smaller domestic and agricultural roofs. With a typical weight of only 4.8kg/m². 0.5mm gauge steel cladding is especially useful when weight is a concern. Please be aware that if you are planning to use 0.5mm gauge sheets on your roof then you must support the sheets more often2, typically every 0.6m (or 2ft).

0.7mm (22swg)

0.7mm steel cladding is the established standard for roofing applications with a typical weight of 6.8Kg/m². 0.7mm gauge can typically be supported2 every 1m.

2 Purlin spaces are guidelines only and may not be correct in every circumstance. We recommend you consult a structural engineer for final approval on purlin centres.

Special finishes

Aluzinc Aluminium Copper Stainless Steel Weathering Steel4
Aluzinc Aluminium Copper Stainless Steel Corten Weathering Steel
Please contact our sales office to discuss minimum order, lead times and products available in special finishes.

4 Cor-Ten weathering steel oxidises to form a protective coating with a rust like appearance.

Disclaimer: All colours shown are web representations. Although we make every effort to show our products in their original colours, due to photography and individual monitors, actual colours may vary. BS and RAL colour references represent the nearest colours and are not an exact match to the colour coating. Special finishes are not colours, images shown are representative as metal finishes can differ from batch to batch.