Drew Valley is largely 1950s and 1960s ranches and split-levels, many updated over the years. These homes tend to have low-pitched, wide roofs, sometimes with flat or nearly flat sections over carports, porches or split-level transitions.
Low pitch changes what materials can be used and how they need to be installed. Getting it wrong is one of the most common reasons we see repeat leaks here.
What we see on Drew Valley roofs.
- Low-pitch shingle roofs. Shingles on low slopes need extra underlayment protection. Without it, wind-driven rain gets under them.
- Flat and near-flat sections. Carports and connectors often need membrane roofing rather than shingles.
- Ventilation. Mid-century homes often have limited attic space and poor airflow, which shortens shingle life.
- Original decking. Older sheathing can be thin or damaged, especially near edges and valleys.
Before you re-roof in Drew Valley.
On a low-slope ranch, ask your roofer what underlayment they'll use and where. Full ice-and-water protection on low pitches is worth the extra cost.
Low-slope sections and carports
Drew Valley's split-levels and ranches often have low-slope sections over carports, porches and additions. Water pools on those sections when the slope is too gentle or the drains are blocked. We add tapered insulation or a new membrane where needed and make sure the drain or scupper actually carries water away.
Attic ventilation on mid-century roofs
Mid-century attics in Drew Valley were often vented with a few gable louvers. Adding soffit intake and a continuous ridge vent during a re-roof brings the attic into balance and reduces the heat that ages shingles from underneath.
Frequently asked questions
Can shingles go on a low-slope roof?
Down to a certain pitch, with extra underlayment. Below that, a membrane roof is the right choice. We'll measure and recommend the correct system.
My carport roof keeps leaking. What can be done?
Most carport roofs are too flat for shingles. Replacing them with a membrane usually solves the problem.
Do you improve attic ventilation during a re-roof?
Yes. We evaluate intake and exhaust ventilation and correct it as part of the job.
Why do split-level roofs leak at the junctions?
The junctions are where two roof levels meet, and the flashing there has to move with both sections. A correct step and counter flashing detail solves most of those leaks.
