mop-and-flop
An application procedure in which roofing elements are initially placed upside down…An application procedure in which roofing elements (insulation boards, felt plies, cap sheets, etc.) are initially placed upside down adjacent to their ultimate location; coated with adhesive or bitumen; and turned over and adhered to the substrate.
Meaning
1 senses(uncountable)An application procedure in which roofing elements (insulation boards, felt plies, cap sheets, etc.) are initially placed upside down adjacent to their ultimate location; coated with adhesive or bitumen; and turned over and adhered to the substrate.
Lessons for this word
1 lessons- A1Countable and uncountable nouns — Because it can be uncountable