Winterize Your Home’s Exterior: The Complete Winterization Checklist

1. Roof
Have your roof inspected for missing, cracked, or curling shingles and damaged flashing before the first heavy snow. Minor issues in the fall can turn into an ice dam, water backing up under shingles and into your attic, once snow starts accumulating and melting unevenly. See HRTI’s Roofing service page for the full range of materials we install.

2. Gutters
Clogged or damaged gutters can’t drain properly, which means water pools, freezes, and adds weight right where gutters are already prone to pulling away from the house. See HRTI’s Gutters page, or our companion guide on the signs you need new gutters before winter if you’re not sure whether yours need a repair or a full replacement.

3. Siding
Walk the exterior and look for gaps, cracks, or separated caulking around siding seams, trim, and any penetrations like vents or hose bibs, since moisture that gets behind siding before winter is what causes freeze-thaw damage. See HRTI’s Siding service page for material options.

4. Windows and Doors
Check weatherstripping around windows and exterior doors, and feel for drafts on a windy day. A failing seal means higher heating bills and more moisture reaching your window frames all winter. See HRTI’s Windows & Doors service page if it’s time for an upgrade rather than a patch.

5. Exterior Paint and Trim
Bare or peeling paint exposes wood trim and siding to moisture right before the season that’s hardest on exposed wood. See HRTI’s Exterior Painting service page if a fuller repaint is on your radar for next season.

6. Fencing
Check fence posts, gates, and hardware for looseness or rot before heavy snow load puts additional stress on them. Fencing is also one of the exterior systems most commonly damaged by hail, which may be reimbursable through your homeowner’s insurance. See HRTI’s Fencing page for materials and insurance coordination.

7. Shutters
If you have exterior shutters, confirm hardware is secure before winter wind, particularly on operable shutters. Many homeowners time a shutter refresh to coincide with a siding or paint project. See HRTI’s Shutters page for style and material options.

A Note for Homeowners in Wildfire-Prone Foothills Areas

If your home is in Jefferson County or Clear Creek County’s Wildland-Urban Interface areas, fall is also a good time to confirm your defensible space work is current heading into the dry, windy conditions that often precede winter’s first snow. See our guide on Jefferson and Clear Creek County’s wildfire resiliency codes for what’s required.

When to Call a Professional vs. DIY

Clearing debris off a single-story gutter or caulking an accessible gap is reasonable DIY territory for many homeowners. A roof inspection, anything involving ladder work at height, or a repair that turns up rot or failed sealant behind siding is worth a professional look, both for safety and because those issues are easy to underestimate from the ground.

Want the Full Explanation Behind This Checklist?

This page is a fast, link-rich checklist covering the exterior systems HRTI services. For a fuller, narrative walkthrough of why each step matters, see our companion guide on how to prepare your home’s exterior for a Colorado winter. And if a storm does cause damage this winter, our guide on preparing for the insurance adjuster covers what to document.

Frequently Asked Questions

What’s the most important exterior task before a Colorado winter?

A roof and gutter inspection is generally the highest priority, since problems in either one can lead to ice dams and water intrusion, which tend to cause the most expensive damage if left unaddressed through winter.

Does HRTI service fencing and shutters, not just windows, siding, paint, and roofing?

Yes. HRTI’s core services are windows and doors, siding, exterior painting, and roofing, and we also provide gutters, fencing, and shutters, so a single contractor can evaluate your whole exterior rather than coordinating separate specialists for each system.

When should I start winterizing my home’s exterior in Colorado?

Early to mid fall, roughly September through October, gives you time to schedule inspections or repairs before the first hard freeze or heavy snow, while temperatures are still moderate enough for exterior work like caulking and painting.

Does fencing really need winterizing, or is that just for the roof and gutters?

Yes. Fence posts and hardware face added stress from snow load, and loose shutter hardware can fail in winter wind, so both are worth a quick check alongside the more commonly discussed roof and gutters.

Can HRTI do a full exterior winter-readiness inspection covering everything on this list?

Yes. HRTI can inspect roofing, gutters, siding, windows, exterior paint, fencing, and shutters as part of a free estimate, and flag anything that should be addressed before winter versus what can reasonably wait.

HRTI: Windows, Doors, Siding, Painting & Roofing, Done Right, From the Studs Out

HRTI has been a full-service exterior remodeling contractor in the Denver metro area and foothills since 1972. Whatever brought you to this page (a siding repair, a re-roof, new windows, or an exterior paint job), our crews inspect what’s behind the surface (sheathing, flashing, moisture barriers, framing) before we ever touch the finish material, because the finish is only as good as what it’s fastened to.

We install and service:

● Windows & Doors: energy-efficient replacement windows and entry/patio doors from Pella, Sierra Pacific, Simonton, Sunrise, Weathershield, and more

● Siding: James Hardie fiber cement, LP SmartSide DiamondKote with RigidStack, vinyl, metal, and specialty wood siding, installed over the correct sheathing every time

● Exterior Painting: full prep, repair of rotted or damaged substrate, and premium Sherwin-Williams coatings

● Roofing: asphalt shingles, synthetic shingles (including DaVinci slate and shake), stone-coated steel, and Class A fire-rated options like CeDUR synthetic shake

Not sure where to start? Call HRTI at 303-984-6159 or email info@hrti.com for a free consultation. You can also reach us anytime through our contact page.