Valley Leak Repair by ARCM Roofing
Expert valley leak repair that stops water intrusion at its source and protects your home from costly structural damage.
5 Highlights on Valley Leak Repair
Valleys Carry the Most Water — and the Most Risk
Roof valleys channel more water than any other section of your roof, which makes them the first place leaks develop. Keeping water moving off the roof and out of your living space is the whole job.
W-Metal and Open Valley Expertise
Our crews repair open metal valleys, closed cut valleys, and woven valleys using galvanized steel, aluminum, and copper flashing.
Ice and Water Shield Installation
We waterproof every valley repair with self-adhering underlayment that seals around fasteners and blocks ice dam intrusion.
Shingle-Matched Restoration
We source architectural and three-tab shingles that match your existing roof, so repairs blend in cleanly.
Full Valley Inspections Included
Every repair starts with a complete assessment of flashing, underlayment, decking, and adjacent shingle courses.
Fast Response Times
Active valley leaks damage insulation, drywall, and framing within days, so we schedule quickly and tarp exposed areas the same day when needed.
If the repaired section leaks again, we return and fix it at no charge.
Why Choose Us
We Repair the Cause, Not the Symptom
Many contractors patch a valley with roofing cement and call it fixed. That approach fails within a season. Our licensed and insured technicians train specifically on valley construction methods — they understand how water behaves where two roof planes meet, and why a valley leaks even when the shingles above it look fine.
Debris dams, corroded flashing, improper shingle overlap, and nail placement too close to the valley centerline all cause failures that untrained eyes miss. We photograph the damage, explain what failed, and quote the repair before any work begins — no surprise charges.
Our repair crews pass background checks before setting foot on your property, show up on time, protect landscaping and siding during the work, and leave the site clean. Professional valley repair should feel simple from your side. We make sure it does.
Written 1-year repair warranty on every valley repair — our confidence in our methods and materials, in writing.
Warning Signs
Signs You Need Valley Leak Repair
Catch these early and you'll pay for a repair instead of a replacement.
Water Stains Below the Valley
Brown rings on drywall directly under a roof valley point to water tracking down the underlayment. The stain often appears several feet from the actual entry point because water travels along rafters before it drips.
Granule Loss Concentrated in the Valley
Valleys carry heavy water flow during storms, and that runoff strips protective granules from shingles faster than anywhere else on the roof. Bald, shiny shingle sections in the valley signal accelerated wear and thinning protection.
Rusted or Lifted Valley Flashing
Galvanized valley metal corrodes over decades, and rust perforations let water through. Wind can also lift flashing edges, which breaks the watertight seal against the underlayment and invites capillary intrusion.
Cracked or Curling Shingles at the Cut Line
Closed cut valleys rely on precisely trimmed shingles overlapping the centerline. When those shingles crack, curl, or shift, water slips beneath them and saturates the decking below.
Debris Accumulation and Moss Growth
Leaves, pine needles, and branches collect in valleys and trap moisture against the roofing material. Moss follows, and its root structures pry shingles apart while the trapped water rots the plywood sheathing underneath.
Two or more signs? Water's likely at your decking. Book now.
How We Work
Our Valley Leak Repair Process
Seven steps that address the root cause, not just the symptom.
01
Inspection and Diagnosis
A technician examines the valley from the roof and checks your attic for moisture trails, wet insulation, and daylight penetration. We photograph everything and share the findings with you.
02
Written Estimate
You receive a detailed quote covering materials, labor, and timeline. We answer your questions before you approve anything.
03
Removal of Failed Components
We strip the shingles flanking the valley, pull the old flashing, and remove degraded underlayment down to the decking.
04
Decking Assessment and Replacement
We probe the exposed sheathing for soft spots and rot. Compromised plywood gets cut out and replaced with new decking, fastened to code.
05
Waterproofing and Flashing
We install ice and water shield along the full valley length, then set new valley metal with proper overlap and cleat fastening that keeps nails out of the water channel.
06
Shingle Installation and Sealing
We shingle both roof planes back to the valley, trim the cut line, and seal the edges according to manufacturer specifications.
07
Final Inspection and Cleanup
We water test the repair, run a magnetic sweep for stray nails, and walk you through photos of the finished work.
Brands We Use
High-Wear-Zone Materials Built for Runoff
GAF
Timberline shingles and WeatherWatch leak barrier
Owens Corning
Duration shingles and WeatherLock ice and water shield
CertainTeed
Landmark shingles and WinterGuard underlayment
Grace
Ice & Water Shield self-adhering membrane
TAMKO
Heritage shingles for valley restoration
Malarkey
Polymer modified shingles for high wear zones
Berger Building Products
Valley flashing metal
Union Corrugating
Galvanized and painted valley metal
Atlas
Pinnacle shingles with Scotchgard protection
Karnak
Flashing cement and sealants for edge detailing
Safety governs every repair: OSHA fall protection, rated harness anchors on steep pitches, and ladders and materials staged to keep your family and our team out of harm's way.
FAQs
FAQs About Valley Leak Repair
›What is valley leak repair?
Valley leak repair is the process of fixing water intrusion where two roof slopes meet. It typically involves replacing damaged flashing, underlayment, and shingles along the valley line, plus any rotted decking beneath.
›When should I schedule valley leak repair?
Schedule it as soon as you notice water stains, damp attic insulation, or visible flashing damage. Water spreads fast once it penetrates the valley, and a delayed repair often turns into a decking replacement.
›Why do roof valleys leak more than other areas?
Valleys collect runoff from two roof planes, so they handle several times the water volume of a standard slope. That concentrated flow wears materials faster and exploits any flaw in flashing or shingle overlap.
›How long does valley leak repair take?
Most residential valley repairs finish in one day. Repairs involving decking replacement or multiple valleys may take two days, weather permitting.
›Can I repair a valley leak myself?
DIY patches with roofing cement mask the problem temporarily but trap moisture and accelerate rot. Proper repair requires stripping the valley, installing membrane and flashing correctly, and reshingling with precise overlap. A qualified roofer does it once and warranties the work.
›Does valley leak repair require a full roof replacement?
No. If the rest of your roof remains in sound condition, we repair the valley section alone. We'll tell you honestly if broader wear makes replacement the smarter investment.
Related Services
Where Two Slopes Meet, We Keep It Sealed.
Water-test verified · Cleat-fastened metal · Most repairs done in a day