kansascats wrote:
any suggestions to block all sunlight from 2 skylights and one large
window?

ask at a window shade place. they make shades that pull up/down with metal
foils in them, and blackout curtains. they leak a bit around the edges,
unless you can recess them a lot.

for skylights, they make shades for them too. motorized ones if out of
reach. you could cheap it with form fit cut pieces of styrofoam.

during the peak summer months, I just want to block the sun...

is aluminum foil adhered to inside of double pane window ok? or
might that overheat the air gap between panes?

installing window shade film to double pane windows would invalidate any
warrantee, so i would bet al foil would also.