It is very important for windows and doors to have the proper flashing installed, to provide maximum protection against water penetration and moisture. Moisture is collected due to condensation or small gaps in the siding as well as bricks.
It flows downward and infiltrates behind the house wrap and this usually can cause damage. Lack of flashing on your windows and doors leads to constant leaking and moisture problems. It deteriorates your walls causing all sorts of problems like mold growth, bad smell and rotting of the wood.