Building a shed without instructions
I have a 6m x 4m shed with no instructions and some diagrams. The company I bought it from are no longer in business. I have put up 2 thirds of the frame. I have an aluminium window and am not sure how it fits. The window will be proud of the mullions in order for the siding to be level with the window face. In other words, the window would currently sit 10 mm forward of the mullions in the air.
How does it fit?
I am assuming that I need some angle iron or the like to attach to the mullions and then screw the window to them level with where the siding will then finish?