Metal roofing
Architectural shingles
Tile roofing
GAF
Owens Corning
Flat & low-slopeFree roof inspection with deck photos before we talk money - GAF and Owens Corning certified installation
Fast, Reliable Roofing Company Across Crestline
Finding a roofing company in Crestline means dealing with realities most valley roofers never face: heavy snowfall at 4,600 feet, ice dams that form under flashings after freeze-thaw cycles, and steep pitches on older mountain cabins that shed snow one day and leak the next. Brennan Roofing Co Riverside works on Crestline roofs year-round, and we build every job around what this elevation actually does to shingles, decking, and flashing. If you need a roof repair, replacement, or inspection in Crestline, call (341) 208-3988 and you’ll get a live person, a straight answer, and a written price before any work starts.
Why Brennan Roofing Co Riverside Is Crestline’s Preferred Roofing Company
Travis Oakley and his crews have walked enough Crestline roofs to know the difference between a roof that will hold through a March storm and one that will not. We do not guess at snow load, and we do not skip ice and water shield because it is easier. The Garrison Standard is the same on every job: a written price in your hand before work begins, background-checked uniformed technicians, and a 365-Day Done Right Promise in writing. If it is not done right, we come back and make it right at no charge. That is not a slogan. It is on paper.
Crestline homeowners call us because they have been burned before: a roofer quotes low, shows up late, or never shows at all. Our crews arrive when we say they will, in uniform, and you know exactly who is on your property. Calls are answered by a live person around the clock. No voicemail, no callback queue, no automated system. When a storm tears a section of flashing off a Lake Gregory cabin at 2 a.m., someone picks up the phone.
We are part of the Garrison Partners family, founded in 2000, and this location is independently owned and operated to the same standard as every other member. That means the discipline is not optional.
Styles & brands we work with






Residential Roofing in Crestline
Residential Roofing in Crestline means designing for snow, wind, and ice in ways that spec sheets alone cannot capture. A roof on a 1930s-era bungalow off Lake Drive carries different weight than a newer chalet near Dart Canyon Road, and the difference shows up in the framing, the underlayment, and the flashing details. What a Crestline homeowner needs is a roof that holds its snow load through January, sheds meltwater without backing up under shingles, and still breathes in July when the ridge gets hot.
Our Roofing Company team starts every residential job by walking the roof and documenting what is actually there: decking condition, rafter spacing, existing underlayment, and where water has been getting in. Then we put the price on paper. Not an estimate range. A number. And it does not move at the door.
Mountain-Spec Underlayment and Flashing
Crestline’s freeze-thaw cycles are the main reason we install ice and water shield on eaves, valleys, and around chimney penetrations as a default, not an upsell. When snow melts against warm flashing and refreezes at night, the ice works its way under shingles and into the decking. The shield is the barrier that keeps that water out.
Steep-Pitch and Snow-Load Framing Reviews
Many older Crestline cabins were framed for a different era’s snow expectations. If we open a roof and find undersized rafters or sagging ridge boards, we tell you before any new roofing goes on. The fix gets priced and approved in writing. We do not hide structural work inside a change order later.
Roof Maintenance in Crestline
Roof Maintenance in Crestline is not a once-a-year formality. At this elevation, maintenance is the difference between a 25-year roof and one that fails in 12. Snow sits on roofs for weeks. Ice builds at the eaves. Needles and duff pile up in valleys and hold moisture against shingles. A maintenance visit at the right time catches small failures before they become ceiling stains and rotted decking.
Brennan Roofing Co Riverside offers roof inspection and maintenance for Crestline homeowners who want to know what their roof looks like before winter, not after the first melt. We check flashing, sealant, drip edge, and decking from the attic side, and we document everything with photos. If we find damage, you get a written repair priority list with dollar figures, not vague warnings.
Pre-Winter Inspection and Snow Guard Checks
Crestline roofs often need snow brackets or snow guards to keep snow and ice from sliding in sheets off a steep pitch. Those guards take a beating. We check that they are anchored correctly and that the sealant around each bracket has not cracked, because a loose snow guard turns into a leak point after the first freeze.
Ice Dam Prevention for Metal and Composition Roofs
Ice dams form under metal flashings after repeated freeze-thaw cycles unique to this elevation band. The fix is a combination of correct underlayment, adequate attic ventilation, and sometimes targeted heat cable at problem eaves. We have pulled apart enough of these to know what actually works and what just moves the ice to a different valley.
Trusted Brands We Service in Crestline
We install materials from GAF, Atlas, and Boral because these manufacturers make products rated for high wind and snow load, and because their warranties hold up when a roof actually has to perform. Crestline homeowners do not need a generic “good shingle.” They need a product that will stay put at 4,600 feet through a heavy winter and a wet spring. We keep our supplier relationships close so parts and warranty paperwork move quickly, and our material choices for Crestline jobs reflect what we would put on our own roofs up here.
See the difference
Before
After
Before
After
Before
AfterCommon Roofing Company Problems We See in Crestline Homes
- Ice dams under old metal flashings. Freeze-thaw cycles lift flashing along chimneys, valleys, and sidewalls, and meltwater soaks the decking below. By the time a homeowner sees a ceiling stain, the decking is often already soft.
- Undersized rafters on 1930s-era cabins. Many older Crestline homes were framed with rafter spacing that does not meet current snow-load code. A re-roof is the right time to correct this, but only if the roofer opens things up and looks.
- Rotted decking hidden under old shingles. Re-shingling over water-damaged decking traps moisture and compounds the leaking the homeowner was trying to fix. It can also void the manufacturer’s wind rating because the fasteners will not hold in soft wood.
- Sliding snow ripping off snow guards and brackets. Wet Sierra cement snow is heavy, and when it slides, it takes anchors, brackets, and sometimes shingles with it. Loose guards then leak at every fastener point.
Pricing for Roofing Company in Crestline, CA
A roof replacement on a typical Crestline cabin or chalet runs $14,000 to $28,000 depending on pitch, decking condition, and whether structural upgrades are needed. A roof repair, like re-flashing a chimney or replacing a damaged section of decking, typically runs $900 to $3,500. A full roof inspection runs $250 to $450, and we credit that amount toward any repair we do afterward. The biggest cost variables in Crestline are roof pitch (steeper is slower and more expensive), decking replacement, and snow-load framing corrections on older homes. Call (341) 208-3988 for a free estimate. We will put the price in writing before any work starts, and it will not move at the door.
We Also Serve Cities Near Crestline
Our Crestline crews also cover Lake Arrowhead, Highland, Loma Linda, and Fontana. If you live in one of those communities and need a roofer who understands mountain snow and valley heat, call (341) 208-3988. We will give you the same written price and the same 365-Day Done Right Promise, no matter which city your roof is in.
Serving Crestline, CA - Our Local Coverage Area
We’re based in the Crestline area and know this community well. Use the map below to see our service coverage - if you’re nearby, we can almost certainly help.
FAQs About Roofing Company in Crestline
Yes. At 4,600 feet with regular freeze-thaw cycles, ice and water shield belongs on all eaves, valleys, and around any roof penetration like a chimney, skylight, or vent. We install it on every Crestline job as a standard part of the roof system, not an add-on. Call (341) 208-3988 for an exact quote, and we will show you exactly where it goes on your roof.
Most 1930s-era bungalows in Crestline run $16,000 to $26,000 for a full tear-off and replacement, including ice and water shield, new drip edge, and decking repair where needed. If the rafters need structural upgrading for snow load, that adds to the price and gets priced separately before any work begins. Estimates are free, so call (341) 208-3988 and we will walk the roof with you.
We verify framing condition and rafter spacing before we install anything, and we use materials rated for high wind and snow load. If the existing framing does not meet current Crestline snow-load code, we tell you and price the correction before work starts. You get a roof that is built for this elevation, not adapted to it after the fact.
Often yes. Ice dams on a relatively young roof usually point to somewhere that ice and water shield was never installed, or to a flashing detail that is allowing water under the shingles. We can open the problem eaves or valleys, install shield correctly, and repair the flashing without replacing the whole roof. Call (341) 208-3988 and we will tell you what is actually going on.
Crestline’s snow-load code often requires larger rafters, closer spacing, or added structural support on older cabins. If your remodel opens the roof and we find undersized framing, the fix is engineered and permitted, and the work gets priced and approved in writing before we touch it. We do not bury structural surprises in a change order.
If you own a home in Crestline and need a roofer who will price the job honestly before it starts, call (341) 208-3988. You will get a live person, a free estimate, and a written price. The 365-Day Done Right Promise is in writing on every job, and if something is not right, we come back. No charge, no argument.
Written by Travis Oakley, Owner at Brennan Roofing Co Riverside, serving Crestline under the Garrison Standard.