Many facade insulation companies often have a problem with internal, in the case of sharp angles on the facade. This is particularly the details at the cornices and soffits of the roof. These are details where it is difficult to estimate how many metres of profile need to be ordered. A very useful aid is the flexible corner, which is supplied in a roll and can be fitted to internal corners of different sizes. The advantage is that it is supplied in 50 bm lengths, which is a great advantage, especially when transporting.