Reviewed by Mario Garcia, General Manager at Windows Hawaii

Most replacement windows last somewhere between 15 and 40 years, and quality fiberglass can go even longer. Where your window lands in that range depends on what the frame is made of, how well it was installed, and how hard the weather is on it. On Oahu, salt air, strong sun and wind-driven rain all speed things up.

How Long Windows Last by Frame Material

Frame material Typical lifespan What wears it out in Hawaii
Aluminum 15 to 30 years Salt air corrosion, pitted frames, worn tracks and rollers
Wood 15 to 30 years, depending on upkeep Termites, moisture and rot, peeling paint from strong UV
Vinyl (quality) 20 to 40 years Very little; it does not rust, rot or need paint
Fiberglass 30 to 50 years or longer Very little; it is stable in heat and humidity

Lifespan ranges are from This Old House. Those are national numbers. A home a few blocks from the ocean in Ewa Beach or Kailua will usually see aluminum and wood wear out faster than a home in Mililani, simply because of the salt in the air.

What Shortens a Window’s Life on Oahu

Salt air

Salt settles on frames, tracks and hardware and holds moisture against them. On aluminum windows this shows up as white, chalky corrosion and rough tracks that make sliders hard to open. It is one of the main reasons island homeowners move to vinyl. Our vinyl vs. aluminum windows guide explains the difference.

Strong sun

Hawaii’s sun is intense all year. UV breaks down paint, seals and weatherstripping over time. Good-quality vinyl is made to handle it, and Low-E glass helps protect what is inside the house from fading.

Moisture and termites

Wood frames and sills that stay damp can rot, and termites are a constant threat on the island. Once a frame is soft or hollow, it cannot hold a window securely.

Installation

Even a great window fails early if it was installed poorly. Missing or failed flashing lets water get behind the frame, which leads to leaks and rot that do not show up until years later.

Signs It Is Time to Replace Your Windows

  • Fog or moisture between the panes. On a double-pane window, this means the seal has failed. Our window condensation guide explains how to tell seal failure from normal condensation.
  • Hard to open, close or lock. Warped frames, corroded tracks and worn hardware all make windows stick.
  • Drafts, whistling or rain getting in. If you feel air or see water on the sill during a storm, the seals or flashing are no longer doing their job.
  • Visible frame damage. Soft wood, rot, cracks, sagging or heavy corrosion usually cannot be fixed for long.
  • Rooms that are always hot. Old single-pane or clear glass lets in a lot of heat, which makes the air conditioning work harder.
  • Old jalousies. Louvered windows let in breeze but also noise, dust and rain, and they are easy to pry open. See our jalousie window guide for replacement options.

Repair or Replace?

Some problems are worth repairing. A broken crank or a worn roller is often a fairly simple fix. Replacement makes more sense when:

  • The frame itself is damaged, corroded or rotted.
  • The glass seal has failed on several windows.
  • The windows are original aluminum or single-pane and near the end of their expected life.
  • You are paying for repeated repairs on the same windows.

If the frames are still solid, a retrofit install can put new windows in without tearing out the old frames. Here is how retrofit vs. full-frame replacement compares.

How to Make New Windows Last Longer

  • Rinse the frames. A gentle rinse with fresh water every few months washes off salt, especially on the ocean side of the house.
  • Keep tracks clean. Vacuum sand and debris out of slider tracks so rollers and locks keep working smoothly. Here is how to clean window tracks step by step.
  • Check weep holes. These small openings at the bottom of the frame let water drain out. Keep them clear.
  • Look at the caulk. If the exterior seal around the frame cracks or pulls away, have it resealed before water gets in.
  • Use mild soap only. Harsh cleaners and abrasive pads can damage frames, coatings and seals.

Frequently Asked Questions

How long do vinyl windows last?

Quality vinyl windows typically last 20 to 40 years, according to This Old House. In Hawaii they hold up well because vinyl does not rust or rot.

How long do aluminum windows last?

About 15 to 30 years nationally. Near the ocean, salt corrosion often shortens that.

How long do double-pane windows last?

The frame and the glass seal age separately. When the seal fails, you will see fog or moisture between the panes. That is often the first sign an older double-pane window is near the end of its life.

How often should windows be replaced?

There is no set schedule. Replace them when they show the signs above, or when they reach the end of the typical lifespan for their material and start costing you in repairs, comfort or energy.

How much does it cost to replace them?

See our window replacement cost guide for Oahu price ranges and a quick calculator, or book a free in-home estimate. You can also call 808-671-0808.