Help me kindly I am insulating a flat roof but i dont know where to put the vapour barrier can i put it under the heat duct or do i have to put it over the heat duct
sorry about my english thank you all
Help me kindly I am insulating a flat roof but i dont know where to put the vapour barrier can i put it under the heat duct or do i have to put it over the heat duct
sorry about my english thank you all
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