Been in this home for 18 years of a 20 year home and have always attributed the loss of asphalt shingle sand to inferior shingles. Now that I'm facing a reroof situation I'm told that the likely cause of the shingle failure is due to inadequate attic ventilation.
I know little about construction, but I am technically minded and common sensical. Only this last summer have I actually been in the attic during the summertime, and it was definitely hot up there (over 100 degrees easy). There are 12 attic vents spaced evenly 6 ft. apart around the back side of the ridge, and within 2 ft of the ridge (of a 1550 sq ft house).
There are under eve vents all around the house, probably 20 or more. What I don't understand is why this design could be inherintly inadequate? There is no ridge vent, BTW. What the roofer says makes sense, and is corroborated by my research.
But shouldn't the under eve vents provide adequate air flow to get the hot attic air up through the attic vents? Unless this is just a builder's bad idea for ventilation, the only thing I can figure is that maybe the blown insulation in the attic is cutting airflow (I don't believe the insulation is blocking the vents themselves). Any response from the experienced is greatly appreciated. Thanks.
I know little about construction, but I am technically minded and common sensical. Only this last summer have I actually been in the attic during the summertime, and it was definitely hot up there (over 100 degrees easy). There are 12 attic vents spaced evenly 6 ft. apart around the back side of the ridge, and within 2 ft of the ridge (of a 1550 sq ft house).
There are under eve vents all around the house, probably 20 or more. What I don't understand is why this design could be inherintly inadequate? There is no ridge vent, BTW. What the roofer says makes sense, and is corroborated by my research.
But shouldn't the under eve vents provide adequate air flow to get the hot attic air up through the attic vents? Unless this is just a builder's bad idea for ventilation, the only thing I can figure is that maybe the blown insulation in the attic is cutting airflow (I don't believe the insulation is blocking the vents themselves). Any response from the experienced is greatly appreciated. Thanks.