Written scope
A recent local fire was the Easy Fire, 30 October to 2 November 2019, at 1,806 acres, ignited near Easy Street and Madera Road at the westerly end of Simi Valley.
Chimney flashing repair in Simi Valley, CA
Chimney flashing is one of the most common leak sources in Simi Valley, because a chimney interrupts the roof plane at a wall, a valley and a penetration all at once.
- Chimney leaks
- Clay tile roofs
- Storm damage
- Photos before quotesYou see what we see
- Scope written firstMaterials listed line by line
- Deck checked at tear-offRotted sheets shown to you
- Magnet sweep at cleanupNails off the lawn
What our chimney flashing repair includes
Proper chimney flashing is step flashing up the chimney sides with counterflashing set into the masonry, not a bead of sealant over old flashing. Sealant over a failed flashing is a temporary patch, and it is described as such when it is used.
- Full flashing inspectionWe check base flashing, step flashing, counter-flashing, and the sealant line on all four sides of the chimney. We also look at the chimney crown and mortar joints, because those fail alongside flashing and cause the same leak.
- Failed material removalWe pull the old flashing with a pry bar and shingle remover, taking care not to damage the surrounding shingles or tiles. Removing the failed material is what makes the new flashing last instead of trapping moisture underneath.
- New flashing installationWe install new base and step flashing matched to your roof material, with proper overlap and correct fasteners. On a full replacement we set new counter-flashing into the masonry and seal the joints with compatible sealant.
- Sealant and joint sealingWe seal the joints where flashing meets masonry and where flashing meets roofing material. We use sealant rated for the roof temperatures Simi Valley sees, so it does not bake out after one summer.
- Water test and cleanupWe run water over the repair area and check for leaks from the attic side when access allows. Then we clean the roof, the gutters, and the ground. You get photos of the finished flashing and a walkthrough of what we did.
Chimney flashing repair for homes
Sealant over a failed flashing is a temporary patch, and it is described as such when it is used.
- Ceiling stains near the fireplace
- Rusted or lifted flashing
- Cracked sealant at the chimney base
- Leaks that show up in heavy rain
Chimney flashing repair for businesses
Simi Valley is an ageing tract re-roof market, not a new-construction market. Most Simi Valley homes were built in the 1960s and the 1980s, with a median construction year in the late 1970s. A large share of roofs therefore sit on homes 35 to 65 years old, at or beyond a first or second re-roof cycle on age grounds alone, so each roof still needs its own inspection.
- RetailFlashing repair on flat roofs with chimney and vent penetrations
- OfficeScheduled repairs that avoid disrupting business hours
- WarehouseLarge roof areas with multiple penetrations to seal
- Multi-unitRepeat flashing repairs across a property portfolio
Chimney flashing repair Simi Valley CA, done right
Roof demand in Simi Valley is driven by inland heat and ultraviolet exposure, concentrated winter rain, and Santa Ana wind, not by snow. Rain is strongly winter-concentrated and summers are essentially dry, so valleys, flashings and drains sit dry and collect debris for months and are then tested in a handful of winter storms. Santa Ana gusts in Simi Valley have been recorded at 62 mph, as on 4-5 October 2013.
A recent local fire was the Easy Fire, 30 October to 2 November 2019, at 1,806 acres, ignited near Easy Street and Madera Road at the westerly end of Simi Valley. The Woolsey Fire ignited on 8 November 2018 south of Simi Valley on or near the Santa Susana Field Laboratory and burned about 80 percent of that site.
We pull the failed metal, rebuild the joint, and seal it so water runs off the roof.
How our flashing repair process works
Chimney flashing is one of the most common leak sources in Simi Valley, because a chimney interrupts the roof plane at a wall, a valley and a penetration all at once.
Roof inspection
Roof demand in Simi Valley is driven by inland heat and ultraviolet exposure, concentrated winter rain, and Santa Ana wind, not by snow.
Leak diagnosis
Rain is strongly winter-concentrated and summers are essentially dry, so valleys, flashings and drains sit dry and collect debris for months and are then tested in a handful of winter storms.
Material matching
Santa Ana gusts in Simi Valley have been recorded at 62 mph, as on 4-5 October 2013.
Repair and replacement
A recent local fire was the Easy Fire, 30 October to 2 November 2019, at 1,806 acres, ignited near Easy Street and Madera Road at the westerly end of Simi Valley.
Water test and walkthrough
The Woolsey Fire ignited on 8 November 2018 south of Simi Valley on or near the Santa Susana Field Laboratory and burned about 80 percent of that site.
Tools and methods we use
Pry bar and shingle remover
Chimney flashing is one of the most common leak sources in Simi Valley, because a chimney interrupts the roof plane at a wall, a valley and a penetration all at once.
Roofing hammer and roofing nail gun
Proper chimney flashing is step flashing up the chimney sides with counterflashing set into the masonry, not a bead of sealant over old flashing.
Utility knife and chalk line
Sealant over a failed flashing is a temporary patch, and it is described as such when it is used.
Ladder stabilizer and fall protection harness
Chimney flashing is also checked with the cricket and the valley metal around it, because water that ponds behind a wide chimney will find any gap in the flashing below it.
Compressor and sealant gun
Simi Valley is an ageing tract re-roof market, not a new-construction market.
Roofing square
Most Simi Valley homes were built in the 1960s and the 1980s, with a median construction year in the late 1970s.
California code flashing details
A large share of roofs therefore sit on homes 35 to 65 years old, at or beyond a first or second re-roof cycle on age grounds alone, so each roof still needs its own inspection.
Material matching
Roof demand in Simi Valley is driven by inland heat and ultraviolet exposure, concentrated winter rain, and Santa Ana wind, not by snow.
When to call for flashing repair
You found a water stain on the ceiling after the first big storm of the season.
Rain is strongly winter-concentrated and summers are essentially dry, so valleys, flashings and drains sit dry and collect debris for months and are then tested in a handful of winter storms.
Your home inspection flagged the chimney flashing before a sale.
Santa Ana gusts in Simi Valley have been recorded at 62 mph, as on 4-5 October 2013.
You are getting the roof replaced and want the flashing done at the same time.
A recent local fire was the Easy Fire, 30 October to 2 November 2019, at 1,806 acres, ignited near Easy Street and Madera Road at the westerly end of Simi Valley.
Your chimney flashing has been patched with caulk two or three times.
The Woolsey Fire ignited on 8 November 2018 south of Simi Valley on or near the Santa Susana Field Laboratory and burned about 80 percent of that site.
How flashing repair runs in Simi Valley
Chimney flashing is one of the most common leak sources in Simi Valley, because a chimney interrupts the roof plane at a wall, a valley and a penetration all at once.
- Wood RanchClay tile roofs are common here, so flashing work has to protect the tile while sealing the chimney joint. We pull tiles carefully and reset them after the new flashing is in.
- Texas TractMature asphalt shingle roofs with original chimney flashing. Many of these joints have been patched over the years and need a full replacement rather than another reseal.
- Old Town Simi ValleyOlder homes with wood shake and clay tile roofs. Flashing details here have to match the thicker roof profile and the original chimney construction.
- Tapo CanyonExposed roofs that take more wind and sun. Flashing fasteners and sealant get more stress here, so we use materials rated for the exposure.
- Summer roof temperatures above 150 degreesSealant bakes out and thin metal warps, which is why most flashing failures start in late summer and show up as leaks in the first winter storm.
- Concentrated winter rain seasonA year's worth of rain can fall in a few storms, so a small flashing gap turns into a ceiling stain fast. We prioritize repairs before the season starts.
From problem to finished result.
Counter-flashing pulled away from brick
BeforeProper chimney flashing is step flashing up the chimney sides with counterflashing set into the masonry, not a bead of sealant over old flashing.
AfterSealant over a failed flashing is a temporary patch, and it is described as such when it is used.
Chimney flashing is also checked with the cricket and the valley metal around it, because water that ponds behind a wide chimney will find any gap in the flashing below it.
Rusted step flashing on a shingle roof
BeforeSimi Valley is an ageing tract re-roof market, not a new-construction market.
AfterMost Simi Valley homes were built in the 1960s and the 1980s, with a median construction year in the late 1970s.
A large share of roofs therefore sit on homes 35 to 65 years old, at or beyond a first or second re-roof cycle on age grounds alone, so each roof still needs its own inspection.
Failed flashing on a clay tile roof
BeforeRoof demand in Simi Valley is driven by inland heat and ultraviolet exposure, concentrated winter rain, and Santa Ana wind, not by snow.
AfterRain is strongly winter-concentrated and summers are essentially dry, so valleys, flashings and drains sit dry and collect debris for months and are then tested in a handful of winter storms.
Santa Ana gusts in Simi Valley have been recorded at 62 mph, as on 4-5 October 2013.
Problems our flashing repair solves
Roof demand in Simi Valley is driven by inland heat and ultraviolet exposure, concentrated winter rain, and Santa Ana wind, not by snow. Rain is strongly winter-concentrated and summers are essentially dry, so valleys, flashings and drains sit dry and collect debris for months and are then tested in a handful of winter storms. Santa Ana gusts in Simi Valley have been recorded at 62 mph, as on 4-5 October 2013.
Water stains on the ceiling near the fireplace
The Woolsey Fire ignited on 8 November 2018 south of Simi Valley on or near the Santa Susana Field Laboratory and burned about 80 percent of that site.
Rusted or lifted flashing around the chimney
Chimney flashing is one of the most common leak sources in Simi Valley, because a chimney interrupts the roof plane at a wall, a valley and a penetration all at once.
Cracked sealant at the chimney base
Proper chimney flashing is step flashing up the chimney sides with counterflashing set into the masonry, not a bead of sealant over old flashing.
Leaks that only show up in heavy rain
Sealant over a failed flashing is a temporary patch, and it is described as such when it is used.
A dry chimney chase and a ceiling that stays clean.
Stop the leak at the source
Chimney flashing is also checked with the cricket and the valley metal around it, because water that ponds behind a wide chimney will find any gap in the flashing below it.
Protect the roof deck
Simi Valley is an ageing tract re-roof market, not a new-construction market.
Keep the chimney usable
Most Simi Valley homes were built in the 1960s and the 1980s, with a median construction year in the late 1970s.
Avoid repeat callbacks
A large share of roofs therefore sit on homes 35 to 65 years old, at or beyond a first or second re-roof cycle on age grounds alone, so each roof still needs its own inspection.
What flashing repair costs
Proper chimney flashing is step flashing up the chimney sides with counterflashing set into the masonry, not a bead of sealant over old flashing. Sealant over a failed flashing is a temporary patch, and it is described as such when it is used.
Chimney flashing is also checked with the cricket and the valley metal around it, because water that ponds behind a wide chimney will find any gap in the flashing below it.
- Roof pitch and accessA steep roof or a chimney in a hard-to-reach spot takes more time and more safety setup. That moves the price up. A walkable roof with easy access keeps it down.
- Roof materialShingle roofs are faster to work on. Clay tile, concrete tile, slate, and wood shake take longer because the material has to be lifted and reset carefully without breaking it.
- Extent of flashing failureA reseal of one joint costs less than a full replacement of base, step, and counter-flashing. If the metal itself has failed, replacement is the only repair that lasts.
- Chimney height and widthA taller or wider chimney has more flashing perimeter to replace. More linear feet of flashing means more material and more labor.
- Hidden damageIf water has rotted the roof decking or damaged the framing around the chimney, that repair adds to the job. We check for it during the inspection and tell you before we start.
These are published Oct-2026 regional market ranges, not Treggo Lume prices. A written estimate follows inspection.
What you receive
Simi Valley is an ageing tract re-roof market, not a new-construction market. Most Simi Valley homes were built in the 1960s and the 1980s, with a median construction year in the late 1970s. A large share of roofs therefore sit on homes 35 to 65 years old, at or beyond a first or second re-roof cycle on age grounds alone, so each roof still needs its own inspection.
Repair photos
The Woolsey Fire ignited on 8 November 2018 south of Simi Valley on or near the Santa Susana Field Laboratory and burned about 80 percent of that site.
Maintenance notes
Chimney flashing is one of the most common leak sources in Simi Valley, because a chimney interrupts the roof plane at a wall, a valley and a penetration all at once.
What homeowners should know about flashing
Proper chimney flashing is step flashing up the chimney sides with counterflashing set into the masonry, not a bead of sealant over old flashing. Sealant over a failed flashing is a temporary patch, and it is described as such when it is used.
Flashing has layers
Sealant over a failed flashing is a temporary patch, and it is described as such when it is used.
Sealant is not flashing
Chimney flashing is also checked with the cricket and the valley metal around it, because water that ponds behind a wide chimney will find any gap in the flashing below it.
Roof material matters
Simi Valley is an ageing tract re-roof market, not a new-construction market.
Roofing coverage across Simi Valley
- Central Simi Valley
- Wood Ranch
- Bridle Path
- Indian Hills
- Texas Tract
- Old Town Simi Valley
- Madera Hills
- Big Sky
- Sinaloa
- Santa Susana
- Corriganville
Most Simi Valley homes were built in the 1960s and the 1980s, with a median construction year in the late 1970s.
Talk to a Simi Valley roofer
Customer reviews are not published on this website yet. If you would like to discuss a roof in Simi Valley, call Treggo Lume Home Roofers at (805) 669-9300 or visit 1712 Erringer Rd, Simi Valley, CA 93065. A written scope follows inspection of the actual roof.
Frequently Asked Questions
Chimney flashing is one of the most common leak sources in Simi Valley, because a chimney interrupts the roof plane at a wall, a valley and a penetration all at once.
A written scope follows inspection of the actual roof, because size, pitch, number of layers, material, access, and permit requirements all change the work. This website does not publish a firm price for this business; published market ranges elsewhere on this site are labelled as market data, not as a quote.
How long the work takes depends on the scope found on inspection: roof size, material, layers to remove, deck repairs, and weather. No completion time is promised on this website; scheduling is arranged by phone after inspection.
The better choice depends on the house: tract or hillside position, roof pitch, weight the framing can carry, fire-zone status, and ventilation. Compare those factors for the actual roof rather than a single ‘best’ label, and confirm permit and fire-zone requirements for the parcel.
Whether a repair or a full replacement is right depends on what inspection finds: isolated damage can often be repaired, while widespread failure, deck damage, or repeated problems usually point to a larger scope. The written scope after inspection states which it is for the actual roof.
Get your chimney flashing repair Simi Valley CA scheduled
Proper chimney flashing is step flashing up the chimney sides with counterflashing set into the masonry, not a bead of sealant over old flashing. Sealant over a failed flashing is a temporary patch, and it is described as such when it is used.
Contact Our Simi Valley Roofers
Call Treggo Lume Home Roofers at (805) 669-9300 or visit 1712 Erringer Rd, Simi Valley, CA 93065, to discuss your roof.
Simi Valley is an ageing tract re-roof market, not a new-construction market. Most Simi Valley homes were built in the 1960s and the 1980s, with a median construction year in the late 1970s. A large share of roofs therefore sit on homes 35 to 65 years old, at or beyond a first or second re-roof cycle on age grounds alone, so each roof still needs its own inspection.
(805) 669-9300