First Storm of the Season: Why It Finds Everything — Common Mistakes
What to do about storm damage in Sherman Oaks in the first forty-eight hours, and what to leave until Monday.
Understanding why something fails is more useful than a list of symptoms, because the same symptom has several causes and they need different work. What follows is what actually goes wrong on storm damage in Los Angeles, and what it looks like from the ground before it becomes a ceiling stain.
What actually goes wrong
After a storm the damage is rarely where people first look for it. Interior stains appear days later and often some distance from the entry point, because water travels along a rafter before it finds somewhere to drop.
Why it happens when it does
The things worth looking for from the ground are lifted or missing material along ridges and leading edges, displaced flashing, and granules collecting at downspout outlets. A shingle that has been lifted and dropped back looks intact from below and has broken its seal — it will lift again in the next wind. If a roof is open, tarping properly and returning to repair once the deck has dried is the right sequence; repairing onto wet sheathing traps the moisture and causes a second failure a year later.
How Los Angeles makes it worse
Sherman Oaks winds come from the north-east, against the lap of most roofs, so uplift damage concentrates on slopes that look sheltered from the street. The first storm of the season also does disproportionate damage, because it lands on eight months of accumulated debris and blocked drainage rather than on a clear roof.
What we look at on an inspection
- Ridge and hip cap security along the full run
- Leading edge adhesion, course by course
- Flashing displacement at every transition
- Debris impact marks and where the debris came from
- Sherman Oaks and drainage blockage
- Interior evidence traced back to source rather than treated where it shows
Common questions
Can this be repaired or does it need replacing?
It depends whether the cause is localised or systemic. A failed penetration is a repair; a covering that has gone brittle across the whole roof is not.
How urgent is it?
Anything open before the rains is urgent. Anything cosmetic can wait for a dry-season schedule, which is also when it is cheaper.
The honest summary
Emergency tarping is a holding measure and should be described as one. Anybody presenting a tarp as a repair, or asking for a full replacement signature while the ceiling is still dripping, is working the situation rather than the roof.
Free inspection, drone photography where access is difficult, and a written estimate with deck repair priced per sheet. No obligation.