External shade

[claypot]

I have used huge sheets of Aluminet for many years and it serves me well but the task of spreading over my glasshouses is getting difficult so I am looking for a simpler less physical solution - hence perhaps roller shade of some sort. Alternative might be to leave it on all year but I doubt whether our dull winters would send sufficient light through in the dark months.
It is not the shade material I am asking, but an easier method of installation/removal.