Pearland Roofing Attic Ventilation and Flashing in Pearland
Two things that never show from the street decide how long a Pearland roof lasts: the air moving through the attic and the metal at every joint. Builder-grade houses from the 2000s and 2010s are where both are most often short.
Ventilation: Intake and Exhaust in Balance
A summer attic here runs well above 120°F. Ventilation will not make it cool, but it keeps the decking and the underside of the shingles from cooking and lets humid air out. The residential code sets a minimum amount of net free vent area — generally one square foot for every 150 square feet of attic floor, or one for every 300 when the vents are balanced between high and low.
The common failure on builder roofs is balance. A ridge vent along the peak with soffit vents painted over, blocked by insulation, or never cut in the first place pulls air from wherever it can, including the house. Mixing exhaust types, a ridge vent plus a powered fan, can short-circuit both.
Flashing on a Two-Story Pearland House
- Step flashing, one piece per shingle course, where a roof slope runs up a wall.
- Kick-out flashing at the bottom of that run, turning water away from the wall and into the gutter. Missing on a great many houses from the 2000s, and the reason for rotted siding and trim just below it.
- Counter-flashing over the step flashing at brick walls and chimney chases, let into the mortar rather than glued to the face.
- Valley and drip-edge metal, which should run under the right layers so water always flows over the next piece down.
When to Fix It
Ventilation and flashing are cheapest to correct during a re-roof, when the decking is open and the old metal is off anyway. On a 2010s roof with years left, a kick-out or a few vents can be added on their own. Ask the contractor to show you the problem in a photograph before the fix is priced.
Hot Upstairs, or Rot Below a Roofline?
Either can point at the attic or the flashing. The contractor will check both.
Call (346) 271-5264 Ask for a Free Roof Review