Congratulations, you have great windows. Now here's how to avoid damaging them.
ComplexityBeginner
Cost$0
Introduction
Congratulations, you have great windows. Now here's how to avoid damaging them.
A couple of years ago, we installed new, dual-pane windows throughout our 100-year-old house. I’d never had them before, so I was amazed at how well they insulated in extreme temperatures, plus kept out the outside ruckus. But what I didn’t realize until after installing them is that cleaning dual-pane glass takes a little more thought than their single-pane cousins.”Cleaning double-pane windows requires careful attention to avoid damage and ensure streak-free results,” says Thomas Patterson at Glass Doctor. “While the glass itself isn’t inherently harder to clean, the seals between the panes are delicate and can be compromised by improper cleaning techniques.”
Here’s how to keep your treasured dual-pane glass windows clear, functional and damage-free.
Tools Required
- A microfiber cloth or duster
- Bucket of warm water with a gentle detergent
- Glass cleaner or a mix of water and white vinegar
- Ladder (if needed)
- Soft-bristle brush for grime
- Squeegee
Project step-by-step (10)
Step 1
Inspect the Glass
Check for signs of damage, moisture or dirt buildup between the panes. “If condensation or fog is inside the panes, cleaning the outer surfaces won’t fix the issue,” says Tim Conn, founder of Image One USA. “It likely means the window seal has broken.”
Step 2
Dust the Glass
Use a microfiber cloth or duster to gently remove dust and debris from the glass.
Step 3
Wash the Glass
Spray the cleaning solution onto the glass or dip your soft-bristle brush into the soapy water, working in circular motions to break up grease, fingerprints, dirt and other grime.
“When cleaning, focus on both the interior and exterior surfaces,” says Patterson. “This process can be time-consuming, but is essential for maintaining clarity.”
Step 4
Squeegee the Surface
Hold the squeegee at a 45-degree angle and start at the top of the glass. Wipe downward in overlapping strokes. After each pass, wipe the blade with a cloth to avoid streaks.
Step 5
Dry the Edges
Use a clean microfiber cloth to thoroughly dry any remaining water along the edges, which will help prevent streaks and water spots.
Step 6
Clean the Frames
Remember to wipe down the window frames, too. Use a damp cloth and dry them thoroughly.
Step 7
Mistakes To Avoid When Cleaning Dual Pane Glass
Patterson says one of the most common mistakes is using excessive water, as it can seep into the seals, causing damage and potentially affecting the window’s insulation properties.
Other common mistakes include:
- Using abrasive materials like rough sponges, steel wool or harsh chemicals, which can scratch or damage the glass;
- Cleaning in direct sunlight, which can cause the cleaner to dry too quickly, leaving streaks.
- Ignoring the frames, since dirty frames can transfer grime back to the glass, undoing your cleaning efforts.
- Forgetting to inspect for seal damage.
- “Cleaning won’t fix issues like condensation or fogging caused by a broken seal,” says Conn. “Attempting to clean between the panes can be futile and may worsen the damage.”
Step 8
How To Keep Dual Pane Glass Clean Longer/Prevent Dirt
Wiping down the glass weekly with a dry microfiber cloth can go a long way toward preventing buildup, says Conn.
You can also:
- Use a protective coating, such as a glass sealant or rain repellent, to keep the surface resistant to dirt and water spots;
- Keep the area around the outside of windows tidy by trimming bushes and other plants, which will minimize dust and debris;
- Regularly clean screens and tracks so they don’t transfer grime to the glass; and
- Check the weather stripping to make sure it’s intact and letting in dirt and moisture.
Step 9
FAQ
Is dual pane glass harder to clean?
Not necessarily, but it does require more care to avoid damaging the seals or causing water leaks. “The challenge is that you cannot clean between the panes if the seal is broken,” says Conn. “Ensuring the seal is intact before cleaning is a must.”
How often should you clean dual pane glass?
Every four to six months, depending on exposure to dirt, weather and traffic, should be sufficient for most homes. However, commercial properties should be cleaned monthly or even weekly, says Conn.
When is it time to replace dual pane glass?
If you notice any of the following signs, it’s likely time to replace your dual pane glass:
- Fogging or condensation between panes. “This indicates a failed seal, reducing the energy efficiency and clarity of the glass,” says Conn.
- Cracks or chips, as visible damage compromises the structural integrity and efficiency of the glass.
- Increased energy bills. “If you notice higher heating or cooling costs, damaged dual-pane glass may be the cause,” says Conn.
- Excessive noise, since the loss of the insulating properties of dual-pane glass can allow more outside noise to enter your space.
Step 10
About the Experts
- Tim Conn is CEO and founder of Image One USA, a commercial cleaning franchise that trains franchisees. He started his career in the cleaning industry at age 14, as a sole proprietor.
- Thomas Patterson has been in the glass business for 45 years and is Director of New Product Development and Technical Training at Glass Doctor, a Neighborly Company with more than 300 retail locations.
