A rigid aluminium profile bar that is popular in lean-to roof construction.
In roof construction, the F profile is used on the first rafter and also the last rafter. Shaped like the letter 'F', the multiwall roofing sheet is wedge fitted into the F prong. The stem or leg of the F is then placed flat against the first rafter and the profile can be screw fitted to the rafter making it secure and non movable.
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