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Planning a roofing project? Use our free roof calculators to estimate the tiles, sheets, fixings and accessories you need before placing your order.
Planning a roofing project? Use our free roof calculators to estimate the tiles, sheets, fixings and accessories you need before placing your order.
Roofin's range of roofing calculators has been created to make estimating materials quicker and easier. Choose the roofing product you plan to use, enter your roof measurements and receive an estimate based on the coverage requirements of that specific system.
Whether you are installing synthetic slate, lightweight roof tiles, tile effect roofing sheets or another roofing system, our calculators provide a simple starting point for planning your project and ordering materials.
Different roofing products have different dimensions, overlaps, coverage rates and installation requirements. A generic square metre calculation is not always enough to accurately estimate the materials required for a complete roof.
Our product-specific roof calculators use the relevant coverage information for each roofing system, giving you a more useful estimate based on the product you actually intend to install.
Our growing range of calculators includes systems from leading roofing brands such as Supaslate, Tapco Slate, Supatile, Aquapan and Corotile, with calculators for additional roofing products being added as they become available.
Select your roofing system below to start calculating your requirements.
Our roof tile calculators help estimate the number of individual tiles or slates required to cover your roof.
Calculators are available for lightweight and synthetic roofing systems including Supaslate Eco Line, Supaslate Pro Line and Tapco Slate.
Rather than simply dividing the roof area by the physical dimensions of a tile, each calculator takes the relevant product coverage into account. This is particularly important with roof tiles and slates because part of each tile is covered by the surrounding tiles once installed.
If you are searching for how many roof tiles you need per square metre, start by selecting the specific roofing system you intend to use.
For sheet roofing systems, our roof sheet calculators help determine the number of sheets required based on the dimensions of your roof and the effective coverage of the chosen product.
Our growing range includes calculators for tile effect roofing systems such as Supatile, Aquapan and Corotile.
Roofing sheets typically require side and end overlaps, meaning the physical dimensions of a sheet do not necessarily represent the area it will cover once installed. Using a calculator designed specifically for your chosen product provides a more reliable starting point than calculating from the nominal sheet dimensions alone.
The amount of roofing material you need depends on the size and shape of your roof, its pitch and the coverage requirements of the roofing product you intend to install.
For a simple pitched roof, you will normally need the dimensions of each individual roof slope. More complex roofs may also include hips, valleys, dormers, rooflights, abutments and other details that affect material quantities and wastage.
Once you have your measurements, select the relevant product calculator and enter the requested dimensions. The calculator will use the coverage information for that particular roofing system to estimate your requirements.
This removes much of the manual calculation involved and makes it easier to compare products, budget for your project and prepare your roofing order.
Roofing products can vary considerably in size and coverage.
Two roof tiles with similar physical dimensions may require different quantities per square metre because of differences in headlap, sidelap or exposure. Likewise, two roofing sheets of the same overall width may have different effective cover widths once the required overlaps are taken into account.
Product-specific calculations are therefore particularly useful when estimating roofing materials.
By creating dedicated calculators for the roofing systems available from Roofin, we can use the relevant product dimensions and coverage information rather than relying on a single generic calculation for every type of roof covering.
Our roof calculator range is continually expanding as we add calculators for more of the roofing products available from Roofin Online.
Depending on the roofing system selected, our calculators can help estimate requirements for materials such as roof tiles, synthetic slates, plastic roof tiles, metal roofing sheets, tile effect roof sheets, ridges, fixings and other compatible roofing accessories.
Each calculator is designed around a particular product or roofing system, so the information and options available may vary between calculators.
If you are still deciding which roofing material to use, you can also use the calculators to compare the approximate quantities required for different roofing systems.
Choose your roofing system from our range of calculators and enter your roof measurements to get started.
Once you have calculated your requirements, you can find the corresponding roof tiles, roofing sheets, fixings and accessories from Roofin Online and build your complete roofing order.
Our roof calculators are intended as material estimation tools. Every roof is different, and measurements, roof details and installation requirements can affect the final quantities required. Calculated quantities should therefore be checked against your individual roof design and the relevant manufacturer's installation guidance before ordering.
