I’ve found tinfoil often lets through entirely too much sunlight (the thin cheap stuff, evidently). But I did do something similar with black card in one house. Now we use blackout curtains, so we can get light through the windows when we actually want it.
I’ve found tinfoil often lets through entirely too much sunlight (the thin cheap stuff, evidently). But I did do something similar with black card in one house. Now we use blackout curtains, so we can get light through the windows when we actually want it.