Firrings (tapered wedges) Price Calculator
We cut our firrings (tapered wedges) from timbers to your bespoke sizes. They are mainly used to form a slope or taper on flat roofs to make sure the rain water runs off. They can be used to level floors or ceilings. They are fastened, using nails, to the top of existing joists and then sheeted over. See the diagram below which illustrates the general shape of a firring. We stock an off the shelf firring that may work out cheaper.
As a guide for deciding on firring height a minimum gradient of 1:80 is usually required. Anything steeper that 1:80 could be a waste. Using the drop down menus below please choose from our standard heights and gradients or enter your own. This site is easier to use on a desktop computer than on tablets or phones. You can collect your firrings or have them delivered. For help using this calculator please ring 01623553797 during working hours. If you require firrings greater than 12m or firrings beyond the scope of this calculator please contact us for a price.Enter your requirements
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Calculator Help and Information
Length of firring
The maximum stock length we have is 6.0m from which we can achieve a firring length of 12m by folding one half over the other. See diagram below. If you need longer please give us a ring or email in.
Timber Thickness
There are two timber thicknesses to choose from, 44mm and 69mm. 44mm is the most common. We have a far greater range of timbers in 44mm. There is no structural reason why 69mm should ever be used for a flat roof but we have included it anyway
in case matching up to 69mm joists is desired. Delivery will cost more for the 69mm due to increased weight.
Timber Treatment
Treatment of firrings is not needed for flat roofs but we have included it just in case it has
been insisted upon. Treatment is only available in the 44mm thickness. WARNING: treatment will be cut away from the tapered edge and maybe from the bottom edge as well.
Different cutting techniques
Photo of treated firring
Delivery Information
DX Freight: This courier delivers the next working day for most areas but can be up to 5 working days for remote areas. They deliver Monday to Friday from 7am till 6pm. Times cannot be specified. If you are not there to receive your goods they will attempt the next working unless you are in a remote area and then it could be longer.
They will make a maximum of three attempts before returning the goods to us. They will not leave the goods without a signature.
After we have dispatched the goods to them, they will delivery to you the next working day although, this is non-guaranteed.Thrasos: This courier delivers Monday to Friday. They will contact you to book in a day. Delivery time is from 7 working days to 6 weeks.Man in a van(3day): This courier delivers Monday to Friday. They will contact you to book in a day. Delivered within 3 working days.