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Your Longmont Siding
Specialists.

When your siding fails, it doesn't fail quietly. Moisture gets into sheathing, energy costs climb, and the interior damage that follows is always more expensive than the exterior repair that would have stopped it. Forge Siding puts licensed, manufacturer-certified crews on your Longmont property — crews who diagnose the actual problem, price it in writing, and fix it once.

15+
Years Field Experience
5,000+
Projects Completed
24/7
Emergency Dispatch
Licensed Siding service in Longmont, CO - Forge Siding
Who We Are

Local Longmont, CO Siding Specialists — Licensed, Certified, Accountable

Forge Siding has been delivering Siding across Longmont, CO for over fifteen years. Our lead installers hold manufacturer certifications on every cladding system we install — fiber cement, vinyl, engineered wood, steel — and the same crew that estimates your project executes it. We don't sub out the technical work.

Our CO operation is licensed, bonded, and insured — GL and workers' comp both current, certificates available before any project starts. Not because it's optional, but because a property owner deserves protection when they invite a crew onto their building.

Every Forge Siding project closes with a signed workmanship warranty document. Not a verbal commitment — an actual document with coverage period, covered defects, and a resolution process you can hold us to. Manufacturer material warranties are registered in your name at project completion, so the coverage that came with the product stays in force.

Licensed in CO Fully Insured Manufacturer Certified 24/7 Emergency Response Written Guarantee
Professional Siding technician working in Longmont, CO
Warning Signs

6 Signs Your Longmont, CO Property Needs Siding Attention

Most siding failures start as small, quiet problems. Catching them before they reach your wall cavity changes the repair scope dramatically — and the cost even more so.

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Visible Cracks or Splits

Hairline fractures look cosmetic. At arm's reach they look different — especially on fiber cement where surface spalling around impact points creates moisture entry that accelerates sheathing damage.

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Interior Moisture Near Exterior Walls

Drywall staining, soft spots when you press near exterior walls, or a persistent musty odor in exterior-adjacent rooms are downstream indicators. The sheathing has usually been wet for weeks before these symptoms appear.

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Warping or Buckling Panels

Warped wood siding typically means unpainted back faces — differential expansion between the painted front and the raw back causes curvature that worsens with every moisture cycle.

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Paint Peeling Within a Few Years

On fiber cement specifically, field cuts that weren't back-primed at installation are the entry point. The paint fails at cut edges first and the pattern makes the cause obvious to anyone who's diagnosed it before.

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Corrosion Around Fasteners

Fastener specification is the most commonly skipped installation requirement. We've documented hundreds of Longmont, CO properties where the original installer used bright nails on fiber cement, voiding the material warranty before the first winter.

⚡

Rising Energy Bills

Wall air leakage through siding failures can account for 10–20% of annual HVAC energy consumption. Addressing the envelope often produces measurable utility savings alongside the repair value.

What We Do

Complete Siding Solutions for Longmont and Surrounding Areas

Our Longmont, CO team handles the full spectrum of residential and commercial cladding work from single-panel storm repairs to complete building envelope re-siding on large multi-family properties.

01

New Siding Installation for Longmont Homes & Properties

New siding installation covers the complete scope: housewrap, flashing at all penetrations, panel installation per manufacturer specification, and finishing trim at corners, windows, doors, and the roofline. We work on new construction alongside general contractors and handle full tear-off replacements on existing Longmont, CO homes and commercial properties. Our crews are certified on vinyl, fiber cement, engineered wood, and steel panel systems — with the documentation to keep every material warranty in force.

For full replacement projects, our tear-off process includes substrate inspection with a calibrated moisture meter on every exposed wall section. Sheathing damage found during demo is documented with photos and priced in a written change order before any additional work proceeds — not discovered on the final invoice.

Full Tear-OffNew ConstructionHousewrap IntegrationTrim SystemsPermit Management
24/7 Emergency Siding experts in Longmont, CO
02

Storm Damage, Impact Repair & Moisture Investigation in CO

Root cause diagnosis before any repair work is our standing process. A cracked panel that gets swapped without investigating the housewrap beneath, a caulk joint that gets re-sealed without checking sheathing moisture — these are surface patches over active problems. We find the cause first, quote the actual fix in writing, and then execute.

Emergency dispatch for genuine siding emergencies — missing panels with rain incoming, active moisture entry into a wall cavity, structural damage — is available around the clock. A live dispatcher answers, not an answering queue. We triage by exposure severity and send a crew based on actual risk.

Hail DamageWind DamageImpact RepairMoisture InvestigationInsurance Documentation24/7 Emergency
Reliable Siding contractor in Longmont, CO by Forge Siding
03

Material-Specific Siding for Every Cladding Platform in CO

Each cladding material has distinct installation requirements that determine whether it performs for 10 years or 40. Our Longmont, CO crews hold certifications specific to the products they install — not one generic approach applied to every material. Fiber cement installation requires back-priming at every field cut, hot-dipped galvanized or stainless fasteners, documented fastener schedules per the manufacturer guide, and silica dust controls during cutting operations. Vinyl installation requires expansion gaps calibrated to the local temperature range in CO. Wood siding requires moisture content verification at delivery, species-appropriate nailing patterns, and end-grain sealing at every butt joint. We address each of these requirements as non-negotiable installation practice.

For commercial and multi-family projects in CO, our operation extends to HOA communities, property management portfolios, and new construction cladding for GCs who need a reliable siding subcontractor with documented quality control. Standardized per-building documentation and a single project point of contact make multi-unit work manageable for property managers.

Fiber CementVinyl SidingWood & CedarEngineered WoodCommercialHOA ProjectsSiding Inspections
Affordable Siding solutions in Longmont, CO
04

Soffit, Fascia & Complete Trim Systems in Longmont, CO

Siding doesn't end at the wall panels. Soffit, fascia, corner posts, J-channel, window trim, door trim, and all penetration accessories are part of the building envelope — and failing trim components are among the most common moisture entry points we encounter during inspection and repair calls. Our Longmont, CO crews handle the complete trim system as standard scope on every installation project.

Vinyl SoffitFascia WrapCorner PostsWindow TrimHardieTrim
Top rated local Siding specialists in Longmont, CO
05

Professional Siding Inspections for CO Buyers, Sellers & Property Managers

A professional siding inspection before buying or selling a Longmont, CO property gives you panel-level condition documentation that general home inspectors don't produce. We assess fastener schedules, test caulk integrity at penetrations, probe sheathing moisture with calibrated meters, and deliver a priority-ranked written report with photo documentation and rough repair cost ranges. Pre-purchase inspections have identified sheathing moisture on properties where the general inspection report said the siding was "in acceptable condition."

Pre-PurchasePre-ListingPost-StormAnnual MaintenanceInsurance Documentation
Trusted Siding service in Longmont, CO - Forge Siding
06

Light Commercial & Multi-Unit Siding for Longmont Investment Properties

Property managers and HOA boards working with us get a dedicated project point of contact, building-by-building scheduling documentation, and a close-out package — permit records, warranty registrations, per-building photos — formatted for board records and institutional property management systems.

HOA CommunitiesMulti-FamilyProperty ManagementLight CommercialNew Construction
Trusted Siding service in Longmont, CO - Forge Siding
Why Forge Siding

Why Longmont, CO Homeowners & Property Managers Choose Forge Siding

There are plenty of siding contractors in CO. Here's what the ones worth hiring actually do differently.

Line-Item Pricing on Every Project

Lump-sum estimates are the contractor's tool. Line-item estimates are the client's. We provide the latter on every project, from a single-panel repair to a full commercial re-siding contract.

Fast Local Dispatch in Longmont, CO

We don't schedule jobs we can't start within a reasonable window. Current backlog means a delay? We tell you upfront with realistic dates, not optimistic ones designed to close the sale.

License & Insurance You Can Verify

An unlicensed contractor on your property creates liability exposure for you personally. License verification before signing eliminates the most common contractor fraud scenario in the Longmont, CO market.

Written Workmanship Warranty

We also deliver a complete close-out package: permit records, manufacturer warranty registrations, and post-project photos organized by elevation. That file is useful for insurance renewals, property sales, and HOA records long after the project ends.

Clean Sites — Every Day, Not Just at Finish

Staging tarps protect landscaping and driveways before demo starts. We sweep for fasteners every afternoon before the crew leaves. Debris is hauled off-site rather than sitting in a roll-off on your driveway for three weeks after the project ends.

Daily Project Communication

The lead installer contacts you each morning to confirm the day's scope and each afternoon to report what was completed. If the project uncovers unexpected conditions — the sheathing damage that shows up during tear-off — you hear about it same-day with photos and a written change order, before we touch anything additional.

Our Process

From First Call to Final Walkthrough — Step by Step

The same documented process governs every project we take in Longmont, CO. No mystery, no moving goalposts — you know what's happening at every stage.

24–48h
To First Assessment
24h
Estimate Delivered
Daily
Progress Updates
100%
Documented Close-Out
1

Call & Site Assessment

You get a real conversation with a dispatcher who knows the product — not a scheduling app that drops your request into a queue. The site assessment is diagnostic, not just a measuring visit.

2

Written Line-Item Estimate

The estimate is a document, not a handshake. It becomes the contract, and every line item is visible before you sign. No lump-sum number to parse after the fact.

3

Permit & Scheduling

Material is ordered against the confirmed schedule. We don't stage material before it's needed and we don't start jobs with missing material. Your crew arrives on day one with everything they need.

4

Daily Installation & Communication

Morning update from the lead installer confirming the day's scope. Afternoon update reporting what was completed. Unexpected substrate conditions documented same-day with photos and a written change order — never added to the invoice without prior approval.

5

Final Walkthrough & Close-Out

We walk every elevation with you at project completion. Every scope item verified complete. If anything isn't right, we note it and fix it before considering the project closed. Final payment collected after the walkthrough sign-off — not before.

Customer Reviews

What Longmont, CO Homeowners Say About Forge Siding

★★★★★

The moisture meter reading at the estimate visit — before we'd agreed to anything — flagged elevated sheathing moisture behind our north wall. That diagnostic step upfront told me immediately what kind of contractor I was dealing with. The rest of the project matched that first impression exactly.

K. Brennan
Longmont, CO homeowner
★★★★★

The insurance documentation package they produced — panel-by-panel photos, written damage scope by elevation — got our claim approved at full replacement on first review. The adjuster told us it was the most detailed storm documentation he'd seen that year.

P. Whitmore
Longmont, CO
★★★★★

We manage a 34-unit townhome community. The per-building documentation, the building-by-building scheduling, the HOA board close-out package — these are things I'd been trying to get from contractors for years and never received until Forge Siding.

D. Reyes, Property Manager
Longmont, CO
★★★★★

They found rotted sheathing on the west wall during tear-off. Called me within the hour, showed me the photos, issued a change order before doing anything. That's the process working exactly as it should — and it's shockingly rare in my experience with contractors.

L. Adeyemi
Longmont, CO
★★★★★

Fiber cement installation — the back-priming at every field cut, the fastener schedule documentation, the manufacturer warranty registration. I've seen fiber cement installed by other contractors. I know what the correct process looks like. Forge Siding followed every step of it.

F. Torres
Longmont, CO
★★★★★

Three bids — two lump sums and one line-item breakdown from Forge Siding. The line-item document made comparison possible in a way the other two bids didn't. When the choice becomes that clear, the decision is easy.

B. Mwangi
Longmont, CO

Our Siding Guarantee in Longmont, CO — In Writing

Our written guarantee specifies what's covered, for how long, and exactly how to invoke it. Every Longmont project we complete closes with this document signed and in your hands before final payment.

+1-844-782-0929 — Free Estimate in Longmont, CO
FAQ

Common Siding Questions in Longmont, CO

For genuine siding emergencies — missing panels with rain incoming, active moisture entry, structural damage — our Longmont, CO dispatch targets two to four hours for daytime calls. After-hours emergency calls reach a live dispatcher, not an answering service. Overnight deployments are available for critical exposures, prioritized by severity. We give you a realistic arrival window when you call, not an optimistic one designed to keep you from calling someone else.
This pricing approach applies to every project, regardless of size. A single-panel repair gets the same estimate format as a large commercial re-siding contract.
Emergency eligibility is determined on the call. We help you assess whether your situation qualifies for emergency dispatch or books on the standard repair schedule — so emergency slots go to genuine critical exposures, not maintenance backlog.
Commercial and multi-family projects are scoped individually. Timeline estimates at the quote stage reflect actual job complexity — not optimistic figures designed to close the bid.
Yes. Where permits are required for siding work in CO — typically for full re-siding projects that involve removing existing cladding — we handle the permit application, pay the filing fee, and schedule the required inspection. The permit fee is included as a transparent line item in your estimate. You never need to navigate the permit office yourself.
We provide our CO contractor license number at first contact and actively encourage verification in the state's public contractor database. License status, classification, and disciplinary history are all public record. The verification takes about two minutes and eliminates the most common contractor fraud scenario in the Longmont, CO market — an unlicensed operator taking a deposit for permitted work they can't legally perform.
Every project closes with two warranties: our signed workmanship warranty document covering labor quality for a defined period, and manufacturer material warranties registered in your name at project completion. The workmanship document specifies covered defects, the warranty period, and the resolution process. It's signed at project close and delivered as part of the close-out package.
Color matching on aged siding is the honest conversation we have at every repair estimate. If your panels have UV-faded significantly, new material will initially read brighter. We show you the closest current match and help you decide whether a partial or full-elevation approach makes more visual sense for your specific situation.
Fiber cement and engineered wood products typically earn the strongest appraiser response in Longmont, CO, partly because transferable 30-year warranties are a documentable asset. We provide the complete warranty and permit documentation file at project close — exactly what a buyer's agent will ask for at the time of sale.
Storm-chaser operations — unlicensed door-to-door contractors who appear after weather events — are a specific risk in CO. They typically take deposits, do substandard work or disappear, and are unreachable when problems appear. License verification before signing is the single most effective filter.
Service Coverage

Siding Across Longmont, CO

Serving Longmont, CO and Every Community in Our Longmont, CO Service Area

Forge Siding provides residential and commercial Siding across the full Longmont, CO service area from our locally based Longmont dispatch team. We're familiar with local building codes, permit requirements, and contractor licensing standards throughout CO — no learning curve on your project, no out-of-area crew navigating unfamiliar inspectors and building departments for the first time.

Serving zip codes: 80501 80503 80504

Get a Free Siding Estimate in Longmont, CO Today

Reach our Longmont dispatch line for fast scheduling, honest pricing, and a crew that shows up when they say they will.

Call Now: +1-844-782-0929

Our Services in Longmont, CO

🟢 Techs On Duty in Longmont, CO Call +1-844-782-0929