installation ( new construction )
i am having siding done with a complete tear off. contractor is installing vinyl siding but windows go in first per his advice.
he is installing windows with flange from outside and then installing tyvek followed by 1/2 inch insulation board and finally the siding.
i have seen some installs where insulation board gets installed before windows with flange. this doesnt make sense, my contractor contends his new construction apps go right to the sheathing and of course properly flashed and then tyvek and insulation board. sound about right?
why would some other contractors install a new construction window over insulation?