Roof Leak Detection & Repair — Lower Mainland Diagnosis Done Right

Not necessarily. Ceiling stains have at least four common sources beyond roof leaks. Plumbing leaks (often a bathroom directly above the stain). HVAC condensate from improperly drained AC or heat pump units. Ice damming (winter only, on hillside properties). And gutter overflow from clogged or damaged gutters that backs water under shingle edges. The first job of leak diagnosis is figuring out which of these is actually causing the water you are seeing. Ceiling stains can sit far from the actual entry point because water travels along framing or the top of insulation before showing up where you can see it.

Faster than most homeowners realize. Hour 1: water enters at the roof, travels along framing or insulation, appears at the ceiling. Day 1 to 7: ceiling drywall absorbs water and starts to fail, insulation gets saturated and loses thermal value, framing begins absorbing moisture. Week 2 to 4: mould begins colonizing wet drywall and insulation. Month 2 to 6: significant mould infestation, structural compromise of affected framing members. Year 1+: structural rot may require expensive remediation. A $1,200 leak repair at hour 1 prevents $25,000+ in cumulative damage if the leak is neglected for months.

Five step diagnostic process. First, interior inspection at the visible water entry. We map exactly where the water is showing up. Second, attic inspection (when access is available) tracking water staining backward toward the entry point. Water travels along framing in predictable patterns. Third, exterior roof walk where we examine every probable entry candidate around the calculated source area: penetrations, valleys, flashing transitions, skylights , chimneys , vent pipes. Fourth, water test if the source is not obvious from visual inspection. We isolate sections and apply controlled water flow until the leak reproduces. Fifth, written diagnosis with photo documentation of the entry point and the failure mechanism.

Depends on what is leaking. Simple repairs: failed pipe boot ($300 to $500), single shingle replacement ($200 to $400), small flashing repair ($400 to $800). Mid scope: skylight reflashing ($800 to $1,800), valley reflashing ($1,200 to $2,500), chimney saddle replacement ($1,000 to $2,500). Larger scope: major flashing rework ($2,000 to $5,000), partial roof section replacement after sheathing damage ($3,500 to $8,000). Diagnosis itself runs $250 to $500 if booked separately, often credited toward the repair cost when we proceed.

Roofing tar from the hardware store fixes nothing permanently. It buys 3 to 12 months at most, and it makes the eventual proper repair more expensive because the tar has to come off before the real fix can happen. The deeper problem: hardware store tar applied without diagnosis often hides the actual leak source while water continues entering somewhere nearby. We have torn off roofs where the homeowner had been applying tar for 5 years to a chimney flashing problem that needed reflashing. The chimney was rotted out behind the flashing by the time we got there. A real diagnosis costs $250 to $500. The proper repair pays for itself many times over compared to the tar approach.

Sudden, accidental damage from named perils (windstorm, fallen tree, hail) is typically covered. Gradual deterioration is typically not. The grey zone is causation. Was the leak caused by Tuesday windstorm, or by ten years of UV degradation that the storm finally exposed? Atmospheric river damage usually qualifies. Old age failure does not. Documentation matters enormously. We provide written reports distinguishing storm attributable damage from pre existing wear, suitable for insurance adjuster review.

During business hours, same day or next day for active interior water entry. After hours and weekends, we respond as fast as crews can reach you. During major atmospheric river events , we run extended dispatch and prioritize active leaks over scheduled work. The tarping protects the interior while we schedule the permanent repair within 2 to 7 days. Active leak situations always get prioritized over normal scheduling.

Our repairs carry a 5 year workmanship warranty. If the same leak returns within that window, we come back and address it at no charge. The warranty covers the specific repair scope. It does not cover new leaks at unrelated points on the roof. We document every repair with before and after photos so the warranty scope is unambiguous.

Depends on the leak severity. Active dripping during rain events: no, that needs immediate attention because water damage compounds daily. Stained ceiling with no current active leak (the leak source healed itself or was minor): waiting a few weeks for better weather is usually fine, but plan to address it before the next major storm. Suspected leak based on indirect evidence (musty smell, visible attic water staining): get the diagnosis now, schedule the repair on whatever timeline the diagnosis recommends. Diagnosis is cheap. Damage is expensive.

In our experience the top five. Failed pipe boots (the rubber gaskets around plumbing vents crack and split after 8 to 12 years). Failed sealants at chimney and wall flashing (sealants degrade in UV, sustainable life is 7 to 10 years). Lifted shingles after windstorms (the thermal seal breaks and the shingle stops being weather tight). Skylight perimeter leaks (sealant or flashing failure around the curb). Valley failures (debris accumulation backs water laterally past the valley liner). Each has predictable failure modes that experienced eyes catch quickly.