Roof leak repair in Fort Collins

Where Fort Collins roofs actually leak

Water almost never comes through the middle of a shingle field. It comes in where something interrupts the shingles, and in this climate a few spots fail over and over.

Pipe boots. The rubber collar around every plumbing vent is the first thing the sun at 5,000 feet destroys. Cracked, split, curled back — after 8–12 years here they're done, and the stain shows up in a bathroom or kitchen ceiling. It is the leak homeowners here ask about most. Expect $250–$450 for a new boot and the shingles around it; ask for a lead or silicone boot, which holds up to this sun better than rubber.

Chimney flashing. The brick chimneys on Old Town and Sheely-area houses were often flashed with a bent strip of galvanized and a bead of caulk. Once the caulk lets go, water runs behind the brick. For chimney flashing repair, Fort Collins' older brick chimneys need step flashing woven into the shingles and counter-flashing cut into the mortar joint — $600–$1,500 depending on chimney size and whether the mortar needs work too.

Valleys. Two slopes meeting carry more water and more melting snow than anywhere else on the roof, and hail hits harder where shingles lie flat. A valley re-lay with ice-and-water membrane underneath is $500–$1,200.

Skylights. The 1990s skylights in Miramont, Clarendon Hills and English Ranch usually leak at the flashing kit, not the glass. For a skylight leak repair, Fort Collins roofers usually start with a new flashing kit at $400–$900; a failed seal or cracked dome means a new unit at $1,200–$2,500 installed.

Wind damage. Chinook winds come off the foothills hard a few times a winter, and they lift the leading edge of any shingle whose seal strip has let go. Patching wind-lifted shingles usually runs $300–$800 for a patch of matched shingles — it's the most common shingle roof repair Fort Collins winters produce. If a whole slope is creased, that is a storm damage claim.

Hail hits and cracked ridge caps. Ridge caps take hail on both faces and crack first. A ridge cap replacement is $400–$900. If bruises show across the field shingles too, talk to your insurer or agent before you pay for a repair.

Ice-dam leaks at the eaves. After a heavy wet spring snow, water backs up behind ice at the gutter line and comes in over the top plate. If the roof has no ice-and-water membrane at the eaves — common on older roofs — the fix is a membrane strip at the eaves and, usually, attic insulation and ventilation work.

These are typical roof repair Fort Collins, CO ranges for 2026, not quotes; the cost page has the full table.

How a roofer finds the leak

1. A good roofer starts in the attic with a flashlight, tracing the water trail on the underside of the decking. Water runs along rafters, so the stain on the ceiling is rarely under the entry point.
2. Then the roofer walks the roof above that spot and checks every penetration and flashing within six feet.
3. If it isn't obvious, a hose test — one section of roof at a time while someone watches from inside — finds almost everything in about thirty minutes.
4. You should get photos and a written price.

The guide on finding a roof leak from inside shows the attic side, if you want to look before you call.

Emergency roof repair in Fort Collins

Emergency work is triaged by how much water is coming in. A tarp on exposed decking typically runs $300–$700 and holds until the permanent fix. If water is coming through a light fixture, turn off that breaker before anything else, then call.

Repair or replace?

Most roof repair in Fort Collins is one or two spots on a roof with years left. If shingles are losing granules across the whole roof, the roof is already on a second layer, or hail has bruised every slope, a repair buys a year — read about a full replacement and the guide on repair versus replacement.

Gutters, decking and the edges of the roof

For gutter and roof repair, Fort Collins homeowners often need two trades: a roofer for the decking, drip edge and first course of shingles, and a gutter contractor for the run itself. A gutter dented flat by hail and overflowing for two seasons rots the fascia and the first course of decking behind it. Rotted decking typically runs $90–$150 per sheet to replace. See the post on deck, fascia and soffit rot for what that looks like before it gets expensive.

Common repairs by Fort Collins neighborhood

Old Town and the streets near CSU: chimney flashing, layered roofs and skip sheathing under later plywood. Rolland Moore, Parkwood and Warren Shores: 1970s–80s houses on their second or third set of shingles, with tired pipe boots and ridge caps. Miramont, English Ranch and Fossil Creek: skylight kits, valleys and wind-lifted shingles on cut-up 1990s roofs. Rigden Farm and Maple Hill: newer roofs that mostly need attention after hail. A repair in any of them starts the same way, in the attic. Loveland and Windsor have their own pages: Loveland and Windsor. Shops, offices and apartment buildings with membrane roofs have a separate guide to flat-roof leaks and repairs.

Before you call: what to write down

A few notes make the visit shorter and the estimate sharper:

• When the stain shows up. After rain, after snowmelt, or only on windy days? A stain that appears only after a chinook points to wind-driven water at a flashing. One that shows up a day or two after a snow points to an ice dam at the eaves.
• How old the roof is, and whether anyone has repaired it before. Old invoices tell the next roofer which spots have already been touched.
• What you can see from the attic hatch. Daylight, wet insulation, a dark ring on the decking. Don't step between joists you can't see.
• Ground-level photos of each slope, the gutters and any shingle pieces in the yard.

How to compare two repair estimates

Repair quotes are short, so what they leave out matters. A sound one names the exact spot, the cause, the materials (a lead or silicone boot rather than rubber, step flashing rather than caulk), the price and how long the price holds. "Repair leak, $900" is not an estimate you can hold anyone to.

If two roofers disagree about the cause, ask each for photos of what they saw. A roofer who found a cracked boot will have a picture of the crack. If one quotes a small fix and the other quotes a whole roof, ask the second for the repair price as well, so you can weigh one against the other.

Common repair mistakes

• Caulk as the fix. Sealant over a failed flashing joint lasts a summer or two in this sun, then cracks.
• A patch that doesn't seal. New shingles have to bond to the course above; on a cold day or an old roof, ask how the roofer will make sure they do.
• Fixing the ceiling first. Let the drywall dry and wait for one good storm to prove the leak is gone.
• Leaving wet insulation in place. Soaked batts or blown-in fill lose most of their value and can hold moisture against the drywall. Pull it and replace it.