The Denver Homeowner's Exterior Maintenance Calendar

Why a Colorado-specific calendar matters

Generic home maintenance advice is written for climates that do not have 70-degree January afternoons followed by 15-degree nights. Along the Front Range, the schedule is driven by three things: the freeze window, the hail season and the intensity of high-altitude sun.

The National Weather Service office in Boulder tracks Denver's freeze and snow history. A few numbers worth building a calendar around:

Layer on the World Health Organization figure of roughly 10 percent more UV per 1,000 meters of elevation, and you have the two forces that age a Colorado exterior: sun during the day, expansion and contraction at night.

March and April: assess the damage

Winter is the hardest season on an exterior and the one you cannot inspect while it is happening. Early spring is your audit.

Walk the house

• Look at fascia, soffits and window sills first. These fail before anything else.
• Check caulk joints around windows, doors, corner boards and where trim meets siding.
• Look at the bottom two rows of siding where snow piled against the wall.
• Rub a sunny wall and check your hand for chalk.
• Note any paint that is peeling, bubbling or cracking, and photograph it.

Check drainage

• Clear gutters of winter debris and verify downspouts carry water well away from the foundation.
• Look for ice dam damage at the roof edge and on fascia.
• Check that grading still slopes away from the house after a winter of freeze-thaw heaving.

Plan, do not paint

March is historically one of Denver's snowier months, and April swings wildly. This is the season for estimates, color decisions and HOA submissions rather than for coatings. Booking now also means you get the dates you want when the weather turns. Our month-by-month painting guide covers exactly which weeks work.

May: the season opens

With the average last freeze near May 5, mid-to-late May is usually the first dependable stretch for exterior coatings.

• Schedule exterior painting if your spring inspection found peeling, chalking or bare wood.
• Wash the house. Even if you are not painting, removing winter grime and chalk slows deterioration.
• Adjust sprinklers before the system runs all summer. Any head spraying siding, trim or fence is quietly destroying the finish.
• Clean and inspect the deck. Check whether water beads or soaks in, and look for popped fasteners and loose boards.
• Trim vegetation back from the walls. Shrubs against siding hold moisture and block airflow.

June through August: work season and storm season

These are the best painting months and the worst storm months, often in the same week.

Exterior work

• Painting, staining and caulking all happen now, with crews following shade around the house and watching afternoon storms.
• Deck staining is ideal in early summer, before boards take a full season of UV.
• Fence staining is often scheduled here too, especially on west-facing runs.

Hail

The Front Range sees hail primarily in late spring and summer. After a significant storm:

• Photograph trim, garage doors, siding, window wraps and the deck.
• Look for chips in the paint film, not just dents. A chip is a water entry point.
• Check with your insurer about coverage before scheduling repairs.
• Have chips primed and touched up promptly so the exposed material does not weather.

Watch the irrigation again

Mid-summer is when sprinkler patterns drift. One head angled slightly wrong can soak the same three feet of siding every morning for months.

September and early October: the second window

September is one of the best painting months of the year here: warm days, cooler nights, fewer storms. With the average first freeze near October 7 and first snow near October 18, this window closes quickly.

• Finish exterior painting before the overnight lows drop below the product's minimum.
• Recaulk every open joint. This is the single highest-value hour of the year, because every sealed joint is water that cannot get behind your paint all winter.
• Stain the deck if it did not get done in spring, while temperatures are still moderate.
• Clean gutters after the first leaf drop, then again later.
• Touch up chips on trim, doors and garage doors so bare spots do not take winter moisture.

Late October and November: close it out

• Winterize irrigation and take the opportunity to redirect any head that was hitting the house.
• Move firewood, planters and storage away from siding. Anything against a wall traps moisture.
• Check the attic and crawlspace for ventilation issues that drive winter condensation.
• Verify downspout extensions are in place before snowmelt season.
• Book interior work. Winter is the ideal time for rooms, ceilings, trim and cabinets.

December through February: interior season

Exterior coatings are off the table in most conditions, but the house still needs attention.

Watch for condensation

Tight modern homes plus winter humidity equals condensation on cold surfaces. Look for water at window sills, peeling near exterior walls, and moisture in corners of unheated rooms. Run bathroom fans during and after every shower, and consider a hygrometer to keep indoor humidity in a reasonable range.

Ice dams

If icicles form in a consistent band along the eaves, warm air is escaping into the attic and melting snow that refreezes at the edge. The water backs up under shingles and shows up as stained, peeling fascia and ceiling stains inside. The fix is insulation and ventilation, not paint.

Interior projects

• Repaint high-traffic hallways, stairwells and kids' rooms with washable finishes.
• Refinish kitchen cabinets while the kitchen is not competing with summer entertaining.
• Prime and repaint any ceiling stains after confirming the leak is resolved.
• Finish basements and bonus rooms while exterior crews are waiting on weather.

How long should exterior paint last in Colorado?

There is no single number, and anyone who gives you one without seeing the house is guessing. What determines it:

The practical rule: inspect annually and repaint when you see fading and early chalking, not when you see peeling. Repainting a faded house is washing and coating. Repainting a peeling house is scraping, sanding, priming and sometimes carpentry, which our cost guide shows is a very different number.

The deck and fence cycle

Exterior wood is on a faster clock than siding because it takes UV from directly overhead plus standing water plus foot traffic.

• Test annually. Pour a cup of water on the boards. Beading means the finish is working. Soaking in means it is time.
• Clean before you seal. Dirt, pollen and mildew block penetration.
• Brighten weathered wood. It restores tone and opens the grain so stain absorbs evenly.
• Mind the moisture. Wood must be dry to the product's requirement before stain goes on.
• Watch the south and west exposures. They will need attention sooner than shaded sections, and spot maintenance is fine.

Our deck and fence staining page covers how we handle cleaning, brightening and product selection.

Printable season checklists

Spring checklist

• Full walk-around with photos of any peeling, cracking or bare wood
• Caulk joint inspection at windows, doors and trim
• Gutter clean-out and downspout check
• Sprinkler audit: run the system and watch where water lands
• Deck water test and fastener check
• Wash the house if you are not painting this year
• Book exterior work and submit HOA colors

Fall checklist

• Recaulk every open joint before freeze-thaw season
• Touch up chips on trim, doors and garage doors
• Stain the deck if it did not get done in spring
• Clean gutters after leaf drop
• Move stored items and firewood away from siding
• Winterize irrigation and correct any head aimed at the house
• Book interior projects for the winter months

What to hand off to a professional

Plenty of this list is weekend work. These are the parts worth handing over:

• Anything above the first floor. Ladder work on Colorado slopes is how weekend projects go wrong.
• Pre-1978 surfaces. The EPA's Renovation, Repair and Painting rule requires certified firms and lead-safe practices when disturbing those painted surfaces.
• Diagnosing a failure you cannot explain. Repainting without finding the cause guarantees a repeat.
• Full exterior repaints. Preparation is the hours that matter, and it is physically demanding, skilled work.
• Cabinet refinishing. Sprayed finishes need equipment, containment and controlled conditions.

The whole year on one page

How to run a sprinkler audit in fifteen minutes

This is the single highest-value maintenance task on the list, and almost nobody does it. Irrigation spray on siding is one of the most common causes of exterior paint failure we find on Front Range homes.

1. Run each zone manually and stand where you can see the house, not the lawn.
2. Watch for spray hitting siding, trim, fence posts or the deck. Even a fine mist counts, because it happens every day for six months.
3. Look for overspray during wind. A head that is fine at 5 a.m. on a calm day may soak the wall on a breezy one.
4. Adjust arcs and radius so water lands on plants, not architecture. Most spray heads adjust with a screwdriver or a nozzle twist.
5. Move heads that cannot be adjusted. Relocating a head costs far less than repainting an elevation.
6. Check drip lines near the foundation for leaks that keep the bottom boards damp.
7. Repeat in midsummer. Heads drift, get bumped by mowers and clog over a season.

While you are at it, look at where water leaves the downspouts. Discharging next to the wall keeps the lowest siding wet after every storm and every snowmelt.

What winter actually does to a Colorado exterior

Freeze-thaw mechanics

Water expands when it freezes. Any moisture that has worked into an open caulk joint, a nail hole, the end grain of a trim board or a hairline crack in stucco expands every freezing night and relaxes every thawing day. Over a season that cycle levers coatings off the surface and widens the opening that let the water in. Denver gets a lot of those cycles, because sunny winter afternoons routinely climb well above freezing even when nights drop into the teens.

Snow against the wall

Shoveled snow piled against siding is a slow soak. It melts, refreezes and keeps the lowest boards saturated for weeks. On north elevations that never see direct sun, that moisture can persist until spring.

Ice dams

Heat escaping into the attic melts snow on the roof. The meltwater runs to the cold eave and refreezes, building a dam. Subsequent melt backs up under shingles and into the fascia, soffit and sometimes the wall. The visible symptoms are peeling fascia paint and interior ceiling stains along exterior walls. Painting those surfaces without addressing attic insulation and ventilation is a guaranteed repeat.

Interior condensation

Modern tight construction plus winter humidity plus single-pane or aging windows equals water on cold surfaces. Running bathroom fans, venting the dryer properly and keeping indoor humidity moderate protects both the paint and the drywall behind it.

Planning an exterior maintenance budget

Homeowners who treat exterior care as an annual line item spend less over a decade than those who wait for a crisis. A reasonable framework for a Front Range home:

• Every year: wash the exterior, clear gutters twice, audit sprinklers, touch up chips, inspect caulk. Mostly your time and a few supplies.
• Every two to three years: re-stain decks and fences, depending on exposure and the water test.
• Every five to ten years: full exterior repaint, with the range depending on exposure, previous preparation quality and product grade.
• As needed: carpentry on trim, fascia and sills; this is where deferred maintenance gets expensive.

The compounding effect matters: a house that gets washed and recaulked annually, with chips primed promptly, reaches its next repaint in better condition, which means less preparation labor, which means a lower repaint cost. Our cost guide shows exactly how much condition moves the number.

Worth owning, worth skipping

Worth owning

• A sturdy extension ladder you are actually comfortable on, or the discipline not to use one
• Exterior-grade caulk and a decent caulk gun
• A quart of exterior touch-up paint in each color, labeled, stored indoors
• A moisture-tolerant stain-blocking primer for quick spot work
• A hose-end sprayer and a soft brush for annual washing
• A hygrometer to watch indoor humidity in winter

Worth skipping

• High-pressure washing of wood siding, which drives water into the substrate and raises grain
• Dry scraping or sanding on pre-1978 homes, which can spread lead dust
• Painting over active moisture because the forecast looks good this week
• Film-forming products on horizontal deck surfaces unless you understand the maintenance commitment
• Any ladder work on a slope above the first story

A professional maintenance rhythm

If you would rather hand the calendar off, this is roughly how we work with homeowners who want to stay ahead of it:

1. Spring assessment. We walk the exterior, photograph anything developing, and tell you what needs attention this year versus what can wait.
2. Targeted work. Caulk, spot priming, trim touch-up and deck staining handled before small problems become repaint triggers.
3. Repaint on your schedule. When fading and early chalking appear, we plan the full repaint for a season that suits you rather than an emergency in August.
4. Warranty follow-through. Our work carries a 5-year written workmanship warranty, so if something we did fails inside that window, we come back.

Making winter productive indoors

From December through March, exterior coatings are mostly off the table. That is not a lost season; it is the best window of the year for interior work, and scheduling is easier because exterior crews are not competing for the calendar.

Projects that suit winter

• Kitchen cabinets. The kitchen is indoors, cure times are controlled, and the result is finished long before spring entertaining.
• High-traffic repaints. Hallways, stairwells, mudrooms and kids' rooms, ideally in washable finishes.
• Ceilings and stain repair. Once a leak is confirmed fixed, winter is a fine time to prime and repaint.
• Basements and bonus rooms. Often the last unfinished space, and entirely weather-independent.
• Trim and doors. Slow, detailed work that benefits from a crew not racing daylight.

Ventilation in a sealed house

Winter painting means closed windows. Low-VOC and zero-VOC products matter more in that context, and so does running fans and cracking a window periodically during application. Colorado tightened VOC limits for architectural coatings in 2020, so most modern interior lines are already low, but if anyone in the home is sensitive, say so before product selection.

Documenting hail damage properly

Front Range hail is routine enough that it deserves a procedure rather than a panic.

1. Wait until it is safe, then photograph before cleaning anything up.
2. Photograph the whole elevation first, then each damaged area, then close-ups with a coin or tape measure for scale.
3. Check specific targets: garage doors, window wraps, fascia, soffit vents, trim edges, deck boards, railings and any painted metal.
4. Note the date and storm. Public weather records corroborate the event later.
5. Call your insurer before authorizing repairs, and ask specifically how painting of repaired or replaced components is handled.
6. Protect exposed material quickly. Spot priming chips keeps water out while the claim process runs.
7. Be careful with door-knocking crews. Use the same hiring standard you would any other month: written scope, insurance certificate, local presence and a real warranty.

Gutters, grading and the water you never see

Most exterior paint failure is a water story, and most water stories start with drainage.

• Clear gutters twice a year, after leaf drop and again in spring. Overflowing gutters pour water down fascia and siding.
• Check downspout discharge. Water should leave at least several feet from the foundation, not puddle against the wall.
• Watch for staining under gutter seams. A dark vertical streak on siding is a leak telling you where it is.
• Look at grading after winter. Freeze-thaw heaves soil, and ground that once sloped away can settle toward the house.
• Keep mulch and soil below siding. Material stacked against siding wicks moisture into it year-round.
• Watch window wells. Standing water there affects basement walls and the paint on them.

None of this is painting work, and all of it determines how long your painting lasts. We flag drainage issues at every estimate, even when the fix belongs to another trade.

A five-year view of exterior care

The homeowners who follow something like this table almost never call us for emergency work, and their repaints cost less because the surface is sound when we arrive.

Your one-page annual routine

If you remember nothing else from this guide, this is the short version that prevents most expensive surprises on a Front Range home:

• Twice a year, walk the exterior with your phone and photograph anything that changed.
• Every spring, run the sprinklers and watch where the water actually lands.
• Every spring, wash the house and clear the gutters.
• Every fall, recaulk open joints and touch up chips before freeze-thaw season.
• Every year, water test the deck and stain when it stops beading.
• When fading appears on south and west walls, start planning the repaint rather than waiting for peeling.
• Keep labeled touch-up paint and the product list from your last project somewhere you can find it.

Seven habits, maybe four hours a year, and they change what your next painting project costs. If you would rather hand the inspection off, we do it free as part of any estimate across the Denver metro.

If you just bought the house

New owners inherit whatever maintenance history came with the property, and they usually inherit it blind. A short first-year routine pays for itself.

• Run the sprinklers and watch the house, because the previous owner may have lived with spray on the siding for years.
• Check the attic for signs of past ice dams or ventilation problems that will show up as peeling fascia later.
• Look for touch-up paint left in the garage or basement, and label whatever you find before it gets lost.
• Photograph every elevation in your first month, so you have a baseline to compare against next spring.
• Water test the deck before your first summer, not after it.
• Look at the caulk joints around windows and doors, which are often the oldest thing on a house nobody has touched.

Doing that in the first year means you find out what the house actually needs on your schedule, rather than discovering it when a wall starts peeling in August.

Dividing the year between you and a contractor

A workable split for most Front Range homeowners looks like this. You handle the observation and the low-risk upkeep; a contractor handles the height, the diagnosis and the work that carries real consequences if it is done wrong.

The pattern is simple: you are the early-warning system, and a contractor handles anything involving height, moisture diagnosis or lead. That division keeps costs down without creating new problems.

The bottom line

Two inspections a year, a sprinkler audit each spring, caulk every fall, and a repaint when you see fading rather than peeling. That rhythm is what separates homeowners who repaint on their own schedule from homeowners who repaint on the weather's schedule.

Want a second set of eyes before winter? Send photos for a free exterior assessment or call 720-208-5645. Projects booked by October 31, 2026 receive 25% off labor, and every project carries our 5-year workmanship warranty.

Written by Denver Paint Contractors. Painting contractors serving Denver and the Front Range with over 20 years of experience, full insurance and a 5-year workmanship warranty. About us or call 720-208-5645.