Frequently Asked Questions

Here are some of our most asked questions with answers – if you have any more questions please don’t hesitate to give us a call on 01837 659 901.

• Q. What width do the sheets actually cover when lapped on the roof?

  A. The 34/1000 and 32/1000 Box Profile sheets cover 1 metre after lapping. The corrugated 13/3 sheeting covers 990mm after lapping. The tile form 41/1000 sheets cover 1m after lapping from right to left.

• Q. How much should each sheet be lapped?

  A. Just 1 corrugation or profile on Box Profile sheeting. However, you may want to lap more corrugations or profiles on the last sheet of the run so the last sheet does not protrude over the end of the roof. It can be recommended with corrugated 13/3 sheeting to over lap by 1 and a half corrugations.

• Q. When using TEK self drilling screws, do you fit them on the top or the lower part of the sheet profile?

  A. For box profile and Tile form - The lower part. They have a neoprene washer below the screw head to prevent leaks and as long as the screws are fitted square, there should be no leaks. If the screws were fitted to the top of the profile the profile and sheet would distort as the screw is tightened.

  For corrugated 13/3 you screw through the top of the corrugations, as due to the curve it cannot be distorted. Screwing into the top allows the washer to fully seal.If you fitted in the gully it may block the flow.

  Remember – do not overtighten or under tighten your screws as this can affect the performance of the washer and prevent it from sealing correctly. See diagram below.

  
• Q. What are the minimum and maximum lengths sheets can be made to?

  A. For box profile and Tile form - The lower part. They have a neoprene washer below the screw head to prevent leaks and as long as the screws are fitted square, there should be no leaks. If the screws were fitted to the top of the profile the profile and sheet would distort as the screw is tightened.

  For 34/1000 box profile 0.5mm maximum length is 7 metres.

  For 34/1000 box profile 0.7mm maximum length is 9 metres.

  For 32/1000 box profile 0.7mm maximum length is 9 metres.

  For 32/1000 box profile 0.5mm maximum length is 7 metres.

  For 13/3 corrugated profile 0.7mm maximum length is 6 metres.

  For 13/3 corrugated profile 0.5mm maximum length is 5 metres.

  For TileForm Profile maximum length is 5 metres.

  Anything outside of these measurements please contact us.

• Q. Is there any minimum order size?

  A. There is no minimum order quantity, but there is a minimum length which is 600mm unless ordering Tile form sheets and the minimum is then 800mm.

  Anything outside of these measurements please contact us.

  Please note a delivery charge will apply to all orders.

• Q. If second quality sheets are ordered, can they be sorted so they are the same colour?

  A. Unfortunately not, seconds sheets are sold as they rise out of the pack.

• Q. What do the sheets weigh?

  A. Each sheet varies in length, please see the product pages for weight.

• Q: Are my sheets checked before I receive them?

  A All sheeting products and accessories are closely inspected and monitored at every stage of manufacture and supply. Once made and packed, sheeting is safely stored ready for collection or dispatch. Each load undergoes a thorough inspection before delivery and cover sheets are used to protect sheet packs. It is the customers responsibility to check their goods on receipt of order before signing for them.

• Q. Should I get my sheets delivered?

  A: Delivery is worth the extra expense as sheets and flashings are bundled together and shipped in packs that are heavy and awkward to handle. When taking receipt of your order, check it’s correct and consistent with the accompanying delivery note. Any issues should be immediately reported to us on the delivery note (drivers copy) or by phoning our Customer Service Team on 01837 659 901. Please note the edges of sheets and flashings can be sharp so remember to wear suitable protective gloves with rubber palms for grip. Items can be collected from our premises in Okehampton, Devon. Simply call us to arrange or visit our delivery page for information on collections.

• Q. Do I need flashings?

  A: Flashings are an integral part of any sheeted roof, covering the ridge where the two sides of a pent/single pitch roof meet, closing off the corners and ends of runs of sheets, creating an apron where a roof abuts a wall or sealing off reveals such as doors and windows. We stock a standard 90º corner or 130º ridge flashings in popular colours. Flashings are generally fitted directly to the high point of the profiled sheet using self-drilling stitching TEK screws (ST22) that has a coarse thread that joins two pieces of sheet metal together. Flashings are available in standard 3m lengths. They should be fitted with a 150mm overlap.

  If you require custom made flashings, please call our sales team on 01837 659 901.

• Q. How should I handle the sheets?

  A Care should be taken when handling sheets to prevent damage or injury. When handling sheets protective clothing such as gloves, steel toe capped boots and high visibilty jackets should be worn to avoid accidents. Ideally mechanical handling equipment (e.g. a forklift truck) should be used where appropriate. Dragging one sheet’s edge across another may cause scratching of the sheet below so take care to lift and not drag sheets. Any packaging should be removed before lifting sheets onto a roof. Once on the roof and prior to fixing, sheets should be kept secured to the roof, close to the rafter line and, in so far as is possible, spread out so their weight is evenly distributed across the purlins. Any debris arising should be removed and off-cuts of insulation, surplus fasteners and similar not left on the sheeting.

  Cladco Profiles Ltd accept no liability for any loss or injury caused by following the information in this guide. If you are unsure about how best to install your roof, we would recommend contacting an experienced professional.

  Before handling any sheeting please visit the HSE website for further information on health and safety guidelines.

• Q: Transport, Handling and storage:

  A: All materials arriving on site must be checked fully before offloading. We recommended offloading using either a forklift or telehandler. Care must be taken not to tip sheet packs or damage the bottom panel when using forks or driving on uneven ground. Cladco advise unloading one pack at a time to avoid any potential damage. We advise wide open forks fully before lifting to avoid any tipping or damage to the sheets, it can be helpful to mark the midpoint of a pack to help with unloading.

  PLEASE NOTE:When manually offloading, make sure appropriate operatives are on hand wearing adequate protective clothing such as protective gloves and footwear. Please note the customer is required to provide safe offloading assistance. Our vehicles will not deliver where access is unreasonable or limited. Our vehicles will not deliver if there is a likelihood of damage to the vehicle or surrounding property. Our drivers will decline unreasonable requests to unload, i.e. unloading alone, walking with sheets long distances, unloading sheets into awkward entrances or passing sheets onto the roof etc.

  Where possible, sheeting should be offloaded directly to the area where they will be used to reduce the risk of on-site damage. Sheet packs should be stored flat on level ground on timber bearers and should never be stacked more than than two packs high. There should be adequate separation between packs to provide access and to avoid end damage. Do not store heavy materials on top of sheets and do not store sheets where people will walk across them.

  UK law requires employers and self-employed contractors to formally assess the risks associated with each roofing job and, before starting their work, to plan and organise their work so that it is carried out in a safe manner. Further information on this and working at heights, other applicable legislative requirements can be found by visiting the Health and Safety Executive’s website www.hse.gov.uk.

  Upon receipt of your order, check that it’s correct and consistent with the accompanying delivery note. Any issues should be reported to us immediately by phoning our Customer Service Team on 01837 659901. Two people may be able to lift a single sheet at a time off a delivery truck, depending on their own physical ability and weather conditions. This will also depend on the length of sheet and weight. The weight of sheets are given on the website. Extra care should be taken in windy or exposed areas. The edges of sheets and flashings can be sharp so remember to wear protective gloves with rubber palms for grip.

  If sheeting is to be left some time before use:

  Do not leave uncovered packs in the open. Capillary action draws water deep into sheet packs which can cause staining of the sheet colour coating*. Cladco advice to store sheets under cover and away from open doorways to reduce moisture penetration of sheet packs. *Although this can disapate once the sheets weather in.

  If packs cannot be stored under cover, erect a simple cover with a waterproof sheet. Ensure space is left between cover and sheets to allow air to circulate.

  Store packs off the ground and on a slope, so that should rain penetrate the cover, the water will drain away.

  Inspect the storage site regularly to ensure that moisture has not penetrated the stack. If sheets become wet, the sheets should be separated, wiped with a clean cloth and stacked to allow air complete drying.

• Q: What is the right type of sheet?

  A: The type of sheet required will depend on the building type, use and appearance. Cladco Profiles manufacture and supply 4 different types of profiled sheeting, all of which can be supplied to the exact length necessary in a choice of colours, with the necessary roof lights, flashings, fixings, fillers etc

  32/1000 Box Profile Sheeting

  32/1000 box profiled sheeting is our most popular profile for either roof or wall cladding. This profile gives 1 metre width cover when lapped and can be made up to 9 metre lengths (for 0.7mm thickness) This single skin sheet due to its 6 rib 32mm deep profile sections can expel water quicker and can be used on roofs at minimum pitch of 4-5 degrees. It is fixed through the lower part of the profile to the purling using self-drilling TEK screws.

  34/1000 Box Profile Sheeting

  34/1000 box profiled sheeting is our most popular profile for either roof or wall cladding. This profile gives 1 metre width cover when lapped and can be made up to 9 metre lengths (for 0.7mm thickness) This is our strongest single skin sheet due to its 7 rib 34mm deep profile sections and can be used on roofs at minimum pitch of 4º. It is fixed through the lower part of the profile to the purling using self-drilling TEK screws.

  13/3 Corrugated Sheeting

  13/3 corrugated sheeting gives a traditional look to either roof or wall cladding. Corrugated sheets give 990mm width cover when lapped and can be made up to 6 metre lengths. Corrugated sheeting is not as strong as 34/1000 box profile due to its smaller profile sections with this in mind you may need closer purlin supports. Corrugated sheeting can be used on roofs at minimum pitch of 10º.

  Due to its curved shape it is fixed through the higher part of the profile to the purling using longer self drilling TEK screws.

  41/1000 Tilesheet

  41/1000 tile form roof sheet gives a roof a pan tiled appearance, giving 1 metre width cover when lapped and can be made up to 5 metre lengths. Tile sheet is considered not as strong as either 34/1000 box profile or corrugated 13/3 due to its stepped sections. These sheets require purlin spacings of 600mm centres. These sheets can be used on roofs with a minimum pitch of 12º. It is fixed through the lower part of the tile profile to the purling using self-drilling TEK screws.

• Q: Can I order a sample?

  A: You can order a colour swatch sample through our website here.

  Please note this is a metal colour swatch and will not be profiled. You can order up to 3 samples at a time and they will be posted Royal Mail 2nd Class.

• Q: Care and Maintenance of my sheets?          

  A: Your new roof should be inspected at least yearly and cleaned of debris such as leaves to ensure a long useful life. Areas that have become marked may be cleaned using soap and water. More persistent marks may be addressed through the usage of white spirit or car paint cutting compound.