A full roof replacement in Simi Valley usually starts with an ageing tract roof: a 1960s shingle roof on its second cycle, or a tile roof whose underlayment has failed while the tile itself is still sound.
Replacement means the old covering comes off, the deck is inspected as it is exposed, soft or rotted sheathing is shown to you and replaced, and the new system goes down in full: underlayment, flashing, covering and ventilation.
Because a full re-roof exceeds both City permit limbs, a City of Simi Valley permit is part of the job, and because it exceeds 50 percent of roof area, the Climate Zone 9 cool-roof values apply unless a documented exception or trade-off is used.
For a single-family re-roof in CEC Climate Zone 9, the Title 24 Part 6 prescriptive cool-roof values are an aged solar reflectance of at least 0.20 with thermal emittance of at least 0.75, or an SRI of at least 16, on steep slopes of 2:12 or more, and at least 0.63 with emittance of at least 0.75, or an SRI of at least 75, on low slopes under 2:12. That requirement is triggered when more than 50 percent of the roof area is replaced, which is a different threshold from the City permit trigger, and the parcel's zone should be checked with the CEC zone finder before a product is specified.
Simi Valley contains High and Very High Fire Hazard Severity Zone parcels, but it is not correct to say that all of Simi Valley is Very High. The parcel's zone must be checked in the CAL FIRE / VCFD Fire Hazard Severity Zone viewer, and on a wildland-urban interface parcel the current citation is Title 24 Part 7, the California Wildland-Urban Interface Code, not the retired CBC Chapter 7A. On such a parcel a Class A fire-rated roof assembly is required.
Published regional market ranges include architectural asphalt at $550 to $900 per square and tile re-lay at $900 to $1,600 per square in a Torrance / South Bay 2026 guide, and California repair work most commonly at $450 to $3,200 in a Modernize guide updated 26 August 2026. One square is 100 square feet of roof surface, not floor area, and a written estimate follows inspection of the actual roof.
Tear it off, fix the deck, rebuild it right.
A full roof replacement in Simi Valley usually starts with an ageing tract roof: a 1960s shingle roof on its second cycle, or a tile roof whose underlayment has failed while the tile itself is still sound.
On such a parcel a Class A fire-rated roof assembly is required.
Your roof is checked as a whole system: deck, underlayment, flashing and drainage.
Published regional market ranges include architectural asphalt at $550 to $900 per square and tile re-lay at $900 to $1,600 per square in a Torrance / South Bay 2026 guide, and California repair work most commonly at $450 to $3,200 in a Modernize guide updated 26 August 2026.
One square is 100 square feet of roof surface, not floor area, and a written estimate follows inspection of the actual roof.
A full roof replacement in Simi Valley usually starts with an ageing tract roof: a 1960s shingle roof on its second cycle, or a tile roof whose underlayment has failed while the tile itself is still sound.
Replacement means the old covering comes off, the deck is inspected as it is exposed, soft or rotted sheathing is shown to you and replaced, and the new system goes down in full: underlayment, flashing, covering and ventilation.
Because a full re-roof exceeds both City permit limbs, a City of Simi Valley permit is part of the job, and because it exceeds 50 percent of roof area, the Climate Zone 9 cool-roof values apply unless a documented exception or trade-off is used.
For a single-family re-roof in CEC Climate Zone 9, the Title 24 Part 6 prescriptive cool-roof values are an aged solar reflectance of at least 0.20 with thermal emittance of at least 0.75, or an SRI of at least 16, on steep slopes of 2:12 or more, and at least 0.63 with emittance of at least 0.75, or an SRI of at least 75, on low slopes under 2:12.
That requirement is triggered when more than 50 percent of the roof area is replaced, which is a different threshold from the City permit trigger, and the parcel's zone should be checked with the CEC zone finder before a product is specified.
Simi Valley contains High and Very High Fire Hazard Severity Zone parcels, but it is not correct to say that all of Simi Valley is Very High.
The parcel's zone must be checked in the CAL FIRE / VCFD Fire Hazard Severity Zone viewer, and on a wildland-urban interface parcel the current citation is Title 24 Part 7, the California Wildland-Urban Interface Code, not the retired CBC Chapter 7A.
On such a parcel a Class A fire-rated roof assembly is required.
Call (805) 669-9300 to arrange an inspection and a written estimate.
Published regional market ranges include architectural asphalt at $550 to $900 per square and tile re-lay at $900 to $1,600 per square in a Torrance / South Bay 2026 guide, and California repair work most commonly at $450 to $3,200 in a Modernize guide updated 26 August 2026.
One square is 100 square feet of roof surface, not floor area, and a written estimate follows inspection of the actual roof.
A full roof replacement in Simi Valley usually starts with an ageing tract roof: a 1960s shingle roof on its second cycle, or a tile roof whose underlayment has failed while the tile itself is still sound.
Replacement means the old covering comes off, the deck is inspected as it is exposed, soft or rotted sheathing is shown to you and replaced, and the new system goes down in full: underlayment, flashing, covering and ventilation.
A full roof replacement in Simi Valley usually starts with an ageing tract roof: a 1960s shingle roof on its second cycle, or a tile roof whose underlayment has failed while the tile itself is still sound.
For a single-family re-roof in CEC Climate Zone 9, the Title 24 Part 6 prescriptive cool-roof values are an aged solar reflectance of at least 0.20 with thermal emittance of at least 0.75, or an SRI of at least 16, on steep slopes of 2:12 or more, and at least 0.63 with emittance of at least 0.75, or an SRI of at least 75, on low slopes under 2:12.
That requirement is triggered when more than 50 percent of the roof area is replaced, which is a different threshold from the City permit trigger, and the parcel's zone should be checked with the CEC zone finder before a product is specified.
Simi Valley contains High and Very High Fire Hazard Severity Zone parcels, but it is not correct to say that all of Simi Valley is Very High.
The parcel's zone must be checked in the CAL FIRE / VCFD Fire Hazard Severity Zone viewer, and on a wildland-urban interface parcel the current citation is Title 24 Part 7, the California Wildland-Urban Interface Code, not the retired CBC Chapter 7A.
On such a parcel a Class A fire-rated roof assembly is required.
Every job starts with an inspection and a written scope before any work begins.
Published regional market ranges include architectural asphalt at $550 to $900 per square and tile re-lay at $900 to $1,600 per square in a Torrance / South Bay 2026 guide, and California repair work most commonly at $450 to $3,200 in a Modernize guide updated 26 August 2026.
One square is 100 square feet of roof surface, not floor area, and a written estimate follows inspection of the actual roof.
A full roof replacement in Simi Valley usually starts with an ageing tract roof: a 1960s shingle roof on its second cycle, or a tile roof whose underlayment has failed while the tile itself is still sound.
Simi Valley contains High and Very High Fire Hazard Severity Zone parcels, but it is not correct to say that all of Simi Valley is Very High. The parcel's zone must be checked in the CAL FIRE / VCFD Fire Hazard Severity Zone viewer, and on a wildland-urban interface parcel the current citation is Title 24 Part 7, the California Wildland-Urban Interface Code, not the retired CBC Chapter 7A. On such a parcel a Class A fire-rated roof assembly is required.
Because a full re-roof exceeds both City permit limbs, a City of Simi Valley permit is part of the job, and because it exceeds 50 percent of roof area, the Climate Zone 9 cool-roof values apply unless a documented exception or trade-off is used.
For a single-family re-roof in CEC Climate Zone 9, the Title 24 Part 6 prescriptive cool-roof values are an aged solar reflectance of at least 0.20 with thermal emittance of at least 0.75, or an SRI of at least 16, on steep slopes of 2:12 or more, and at least 0.63 with emittance of at least 0.75, or an SRI of at least 75, on low slopes under 2:12.
That requirement is triggered when more than 50 percent of the roof area is replaced, which is a different threshold from the City permit trigger, and the parcel's zone should be checked with the CEC zone finder before a product is specified.
Simi Valley contains High and Very High Fire Hazard Severity Zone parcels, but it is not correct to say that all of Simi Valley is Very High.
The parcel's zone must be checked in the CAL FIRE / VCFD Fire Hazard Severity Zone viewer, and on a wildland-urban interface parcel the current citation is Title 24 Part 7, the California Wildland-Urban Interface Code, not the retired CBC Chapter 7A.
On such a parcel a Class A fire-rated roof assembly is required.
We show you what we find, explain the options, and agree the scope in writing.
Published regional market ranges include architectural asphalt at $550 to $900 per square and tile re-lay at $900 to $1,600 per square in a Torrance / South Bay 2026 guide, and California repair work most commonly at $450 to $3,200 in a Modernize guide updated 26 August 2026.
Replacement means the old covering comes off, the deck is inspected as it is exposed, soft or rotted sheathing is shown to you and replaced, and the new system goes down in full: underlayment, flashing, covering and ventilation.
Because a full re-roof exceeds both City permit limbs, a City of Simi Valley permit is part of the job, and because it exceeds 50 percent of roof area, the Climate Zone 9 cool-roof values apply unless a documented exception or trade-off is used.
These are published Oct-2026 regional market ranges, not Treggo Lume prices. A written estimate follows inspection.
For a single-family re-roof in CEC Climate Zone 9, the Title 24 Part 6 prescriptive cool-roof values are an aged solar reflectance of at least 0.20 with thermal emittance of at least 0.75, or an SRI of at least 16, on steep slopes of 2:12 or more, and at least 0.63 with emittance of at least 0.75, or an SRI of at least 75, on low slopes under 2:12. That requirement is triggered when more than 50 percent of the roof area is replaced, which is a different threshold from the City permit trigger, and the parcel's zone should be checked with the CEC zone finder before a product is specified.
Because a full re-roof exceeds both City permit limbs, a City of Simi Valley permit is part of the job, and because it exceeds 50 percent of roof area, the Climate Zone 9 cool-roof values apply unless a documented exception or trade-off is used.
For a single-family re-roof in CEC Climate Zone 9, the Title 24 Part 6 prescriptive cool-roof values are an aged solar reflectance of at least 0.20 with thermal emittance of at least 0.75, or an SRI of at least 16, on steep slopes of 2:12 or more, and at least 0.63 with emittance of at least 0.75, or an SRI of at least 75, on low slopes under 2:12.
A full roof replacement in Simi Valley usually starts with an ageing tract roof: a 1960s shingle roof on its second cycle, or a tile roof whose underlayment has failed while the tile itself is still sound.
Simi Valley contains High and Very High Fire Hazard Severity Zone parcels, but it is not correct to say that all of Simi Valley is Very High.
The parcel's zone must be checked in the CAL FIRE / VCFD Fire Hazard Severity Zone viewer, and on a wildland-urban interface parcel the current citation is Title 24 Part 7, the California Wildland-Urban Interface Code, not the retired CBC Chapter 7A.
On such a parcel a Class A fire-rated roof assembly is required.
Photos of the problem and the finished repair are shared with you at the end.
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.
Published regional market ranges include architectural asphalt at $550 to $900 per square and tile re-lay at $900 to $1,600 per square in a Torrance / South Bay 2026 guide, and California repair work most commonly at $450 to $3,200 in a Modernize guide updated 26 August 2026. One square is 100 square feet of roof surface, not floor area, and a written estimate follows inspection of the actual roof.
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.
Call for an inspection when you see ceiling stains, missing or cracked shingles or tiles, lifted ridge caps, granules washing into gutters, or dampness in the attic. A stain rarely sits directly below the leak, so the source is traced on inspection rather than assumed.
A sound, well-detailed roof supports a home's condition and appearance, but this website does not promise any resale value, appraisal result, or return on investment.
A full roof replacement in Simi Valley usually starts with an ageing tract roof: a 1960s shingle roof on its second cycle, or a tile roof whose underlayment has failed while the tile itself is still sound.
Call Treggo Lume Home Roofers at (805) 669-9300 or visit 1712 Erringer Rd, Simi Valley, CA 93065, to discuss your roof.
Because a full re-roof exceeds both City permit limbs, a City of Simi Valley permit is part of the job, and because it exceeds 50 percent of roof area, the Climate Zone 9 cool-roof values apply unless a documented exception or trade-off is used.
(805) 669-9300
