We would like to install electric shutters. Plastic panels are included in the cost of the building. Now we have heard that above a certain width, only aluminum is recommended, otherwise they can warp. But what exactly is the width? What role does heat play in this? Of course, the largest areas of windows are in the south.
The window manufacturers' answers confuse us more than they help. One says it has to be aluminum from 4m², another says plastic is good for 3m wide and 4.50m², the next accepts only aluminum because of the heat in the south. The manufacturer gives no information at all – I think that's weak! This is pure chaos.
Aluminum is very expensive and we don't want to waste money unnecessarily. But of course it would be a shame if things warped in the sun. Our largest windows are 2100 high and 1650 wide. What would you use?