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The Colorado home maintenance schedule worth keeping.

A practical calendar for safety, heating and cooling, water, roofs, wildfire conditions, irrigation and long-term replacement planning along the Front Range.

First: build a property record

Before worrying about a perfect calendar, document the home. Record the installation year, model number and warranty for the roof, furnace or heat pump, air conditioner, water heater, appliances, smoke alarms, radon system, sump pump, irrigation and any septic or well equipment. Save the inspection report, permits, invoices and dated exterior photographs in one folder.

Build a personalized maintenance plan if you want this schedule filtered to your actual systems.

Core recurring schedule

Every month

Smoke and carbon-monoxide alarms

Use the test button on every alarm. Replace batteries according to the alarm instructions. Smoke alarms should be replaced 10 years from the manufacture date; CO-alarm replacement age depends on the product and its end-of-life signal.

U.S. Fire Administration and CPSC
Monthly; at least every 3 months

HVAC air filter

Inspect monthly during heavy heating and cooling use. Replace when dirty and, for typical disposable filters, at least every three months unless the equipment or filter manufacturer specifies a different interval.

ENERGY STAR
Every month

Leak and moisture walk

Check under sinks, around toilets, appliance hoses, the water-heater pan, sump area, ceilings below bathrooms and basement or crawlspace walls. Repair active leaks promptly and confirm downspouts discharge away from the foundation.

DOE water-equipment guidance
Every dryer load / yearly

Dryer lint and exhaust

Clean the lint screen before each load. Clean or professionally inspect the full dryer vent ductwork yearly, sooner when drying time increases, the laundry room becomes humid or the dryer runs unusually hot.

U.S. Fire Administration
Every year

Heating and cooling service

Schedule professional pre-season service: cooling in spring and heating in fall. Fuel-burning furnaces, boilers, water heaters, fireplaces, chimneys, flues and vents should receive an annual safety inspection as applicable.

ENERGY STAR and CPSC
Every 2 years or after changes

Radon

Test when the prior result is unknown or old, after major renovations, or when a lower level becomes occupied. Homes with mitigation systems should be retested at least every two years and the system indicator checked regularly.

U.S. EPA
Every 1–3 / 3–5 years

Septic system

Have the system inspected every one to three years. Typical household tanks are pumped every three to five years, adjusted for household size, tank size, water use and measured solids.

U.S. EPA SepticSmart
Every year

Private-well water

Test at least annually for total coliform bacteria, nitrates, total dissolved solids and pH using a certified laboratory. Ask the local health department about additional contaminants relevant to the area.

U.S. EPA and CDC

Colorado seasonal calendar

Late winter and early spring

  • Inspect visible roof edges, flashing, siding and gutters after snow, wind and freeze-thaw cycles.
  • Test the sump pump and verify the discharge remains open and carries water away from the foundation.
  • Schedule cooling-system service before contractors become busy.
  • Check grading and downspout extensions before spring moisture.
  • Document hail-sensitive exterior conditions with dated photographs.

Late spring and early summer

  • Start irrigation carefully, flush lines, inspect each zone and correct broken or misaligned heads.
  • Inspect decks, exterior stairs, fences and painted surfaces for loose fasteners, rot and coating failure.
  • Remove leaves, needles and debris from roofs, gutters, decks and the first five feet around the home when wildfire exposure applies.
  • Trim branches over roofs and keep grasses and fuels managed in the home ignition zone.

Late summer and fall

  • Schedule heating and fuel-burning appliance inspection before sustained cold.
  • Inspect and clean fireplaces, wood stoves and chimneys before use.
  • Clean gutters after leaf drop and confirm drainage remains directed away from the structure.
  • Winterize irrigation before hard freezes. Colorado State University Extension warns that retained water must be removed correctly and backflow devices require proper handling.
  • Disconnect hoses, protect vulnerable exterior plumbing and inspect weatherstripping.

Winter

  • Keep furnace, dryer, stove and fireplace exhaust vents clear of drifting snow and debris.
  • Watch for ice dams, frozen exterior lines, unusual furnace cycling and new ceiling stains.
  • Keep combustible storage at least three feet from heating equipment.
  • Use indoor months to review insurance coverage, emergency contacts and replacement reserves.

Replacement planning ranges

These are budgeting ranges, not automatic replacement deadlines. Installation quality, maintenance, use, product type, ventilation, hail, wind, sun and freeze-thaw exposure can materially change service life. A qualified condition assessment is more useful than age alone.
Around 10 years

Storage water heaters

Traditional gas and electric storage water heaters often enter replacement-planning territory around 10 years. Watch for corrosion, leakage, rumbling, inconsistent temperature and rising energy use.

NAHB component-life study; manufacturer guidance controls
10–15 years

Central air conditioning

Condition, refrigerant type, maintenance history and comfort performance matter. Begin budgeting before failure when an older system is unreliable or inefficient.

NAHB component-life study
15–20 years

Furnaces

Annual maintenance and safe combustion matter more than age alone. Replacement may be justified earlier for heat-exchanger concerns, repeated repairs or major comfort problems.

NAHB component-life study
About 16 years

Heat pumps

Use this only as a budget signal. Operating hours, climate, installation and maintenance strongly affect actual life.

NAHB component-life study
About 20 years

Asphalt-shingle roofing

Colorado hail, wind, elevation, ventilation and installation can shorten or extend this broad national planning range. Inspect after severe storms and use condition—not age alone—to decide.

NAHB component-life study
10 years

Smoke alarms

Replace the entire alarm 10 years after manufacture, even if the test button still works.

U.S. Fire Administration

When not to wait for the calendar

Call for qualified help promptly for active water intrusion, sewage backup, gas odor, sparking or overheating electrical equipment, repeated breaker trips, structural movement, a nonfunctioning safety alarm, visible chimney damage, furnace combustion concerns or radon results at or above the EPA action level.

Research sources