The ACM Pros Exteriors

Sliding Windows

One or both sashes slide sideways in a track. You get a wide opening without lifting the weight of a sash.

Exterior windows and doors only. We do not install interior doors or interior windows.

How it opens

Quick answer

A sliding window, often called a slider, has one or two sashes that glide sideways in a track. It suits wide, short openings and gives you plenty of glass with little frame. In North Alabama the track collects pollen and grit, so plan on cleaning it a couple of times a year.

At a glance

How it opens
One or both sashes slide sideways in a track.
Best for
Wide, short openings, basements, and rooms where you want more glass and less frame.
Watch for
A track packed with pollen and grit, which stops the sash closing square.
Upkeep
Vacuum and wipe the track twice a year. No chemicals needed.
Scope
Exterior windows only. We do not install interior windows or doors.
Before and after: old porch windows with failing frames replaced by a new white picture window and sliders
ACM job photo

The details

Who it suits

Wide, short openings, basement windows, and rooms where you want the most glass with the least frame. Where a double-hung would need two narrow units side by side, one slider gives the same opening with less frame in the view.

Sliders are also easy for anyone who finds lifting a sash hard, because you push sideways instead of up.

How it compares

The simplest mechanism of any window that opens, with the fewest moving parts to fail. It seals less tightly than a casement and about the same as a double-hung.

The weak point is the track. It collects pollen and grit, which is a real concern during a North Alabama spring.

In this climate

A slider seals against a track, and a track is the part of a window this climate fills. Spring pollen, then summer grit, then fall leaves all end up in the lower track, and a track that is not clear stops the sash closing square. That is the trade for the wide, low opening a slider gives you.

Weep holes, the small drain slots on the outside of the sill, matter more on a slider than on any other style, because a blocked track holds water against the frame.

Keeping a slider working

Twice a year, open the sash, vacuum the track and wipe it with a damp cloth. Skip cleaners and sprays, which leave a film that holds more dirt. Check that the weep holes on the outside are open; a short piece of wire clears them. If the sash still drags after a good clean, the rollers underneath may be worn.

How to tell if yours needs replacing

  • The sash drags or jumps the track even after a good cleaning.
  • Fog or moisture between the panes.
  • Daylight or a draft where the two sashes meet, with the latch closed.
  • Water pooling in the track after rain, or stains and soft spots on the siding below.
  • Original aluminum frames, which move with every change in temperature and lose their seal over time.

What affects the price

We price after measuring, line by line, with the materials named. These are the things that move the number.

  • Opening width and panel count
  • Frame material
  • Roller quality
  • Glass package
  • Whether the track is drained

How a job works

  1. Step 1: Free in-home estimate

    We walk your exterior, measure, and show you the options. There is no charge and no pressure.

  2. Step 2: Choose your materials

    You get a written scope with every line and material named. Then we order for your home.

  3. Step 3: Installed and cleaned up

    Cut, fitted, trimmed, cleaned up and hauled away the same day. You never look at a pile of old frames.

From our recent jobs

Real ACM job photos. Every photo marked “ACM job photo” is from one of our own jobs.

See more of our work
  • Before and after: old porch windows with failing frames replaced by a new white picture window and slidersACM job photo

    Porch window replacement

    Old porch windows with failing frames replaced with a new picture window and sliders, set and sealed from the outside.

  • Before and after: a worn double-hung window in red brick replaced with a new white double-hung windowACM job photo

    Double-hung window replacement in brick

    A worn double-hung window with a deteriorated sill replaced with a new white double-hung unit.

  • An ACM team member giving a thumbs up beside a newly installed picture window on a brick ranch homeACM job photo

    New picture window on a brick ranch

    A large picture window installed on a brick ranch home, finished and cleaned up the same day.

What homeowners say on Google

  • Google review

    ACM Pros replaced our windows and our front door in Hazel Green, AL. We are very happy with the work and the team.

    Ben Stachowiak, Hazel Green

Questions people ask

Do sliders leak more air than other styles?

They seal less tightly than a casement and about the same as a double-hung. The seal depends on the sash meeting the track evenly along its whole length. The wider the window, the more the quality of the installation shows.

How much maintenance does the track need?

Twice a year with the pollen we get here: a vacuum and a wipe, not a chemical. Most slider complaints we are called about turn out to be a track problem, not a window problem.

What size opening suits a slider best?

Wide and short. Where a double-hung would need two narrow units side by side, one slider gives you the same opening with less frame in the view.

What is the difference between a single and a double slider?

On a single slider one sash moves and the other is fixed. On a double slider both move, so you can open either side. A double slider gives more choice for airflow, while a single slider has one fewer moving part.

Are sliding windows easy to open?

For most people they are the easiest style to open. You push the sash sideways on rollers instead of lifting its weight. Good rollers and a clean track keep it that way for years.

Can a slider work as an emergency exit?

It can, if the open half is large enough. Only one sash opens on most sliders, so roughly half the window is clear space, and it has to be sized with that in mind. That is worth checking at measuring for any bedroom or basement window.

Do you install sliding windows or doors inside the house?

No. We replace exterior windows only, the ones in your home's outside walls. We do not install interior windows or interior doors of any kind, and we do no interior remodeling.

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We're based in Madison and work across North Alabama, providing sliding windows in every area below. We do not work in Tennessee.

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An installer checking a new exterior window with a level
Illustration

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