How to Clean Skylights from Inside and Outside – Easy Methods

Cleaning skylights doesn’t have to be difficult—with the right tools and techniques, you can keep them streak-free, spotless, and functioning at their best. Whether your skylights are fixed, opening, or walk-on, knowing how to clean them both inside and outside is key to maximizing natural light and extending their lifespan. In this guide, we’ll walk you through step-by-step methods for safely and effectively cleaning skylights, using eco-friendly solutions and expert-approved techniques. From removing dirt and grime to preventing condensation buildup, you’ll find the best cleaning method for your home or business—all in a quick and easy process.

Let’s get started on achieving crystal-clear skylights!

Why Cleaning Skylights Regularly is Important

Keeping your skylights clean isn’t just about aesthetics—it helps maintain maximum light, energy efficiency, and longevity. Here’s why regular skylight maintenance is essential:

• Maximizes Natural Light & Keeps Interiors Bright

Over time, dirt, dust, and grime accumulate on skylights, reducing the amount of sunlight entering your home. Regular cleaning ensures living rooms, kitchens, lofts, and workspaces stay bright and inviting. Fixed, opening, and flat roof skylights all benefit from clear, unobstructed glass, improving overall ambiance.

• Prevents Dirt Buildup & Reduces Maintenance Costs

Skylights in bathrooms, kitchens, and commercial spaces often accumulate grease, steam, and condensation. Built-up dirt can lead to water stains, streaks, and even mold growth, increasing repair and maintenance costs. Cleaning skylights twice a year can prevent expensive restoration work.

• Extends Skylight Lifespan & Protects Against Damage

Triple-glazed skylights and self-cleaning glass options last longer when properly maintained. Dirt and moisture buildup can weaken skylight seals and frames, leading to leaks or cracks. Skylights on flat roofs and walk-on skylights require extra attention to prevent damage from foot traffic and debris.

• Improves Energy Efficiency & Insulation

Argon gas-filled skylights and low-emissivity (Low-E) coatings work best when kept clean. A layer of dirt can block solar heat in winter, making heating less efficient. For eco-friendly homes, regular skylight cleaning reduces energy waste and keeps indoor temperatures stable.

• Enhances Curb Appeal & Increases Property Value

Crystal-clear skylights improve the overall look of your home, making it feel modern and well-maintained. For businesses, clean skylights create a professional, polished appearance, improving customer perception. Well-maintained skylights can increase property value and appeal to potential buyers.🔎 Pro Tip:
For hard-to-reach skylights, consider self-cleaning glass options from Regal Glass Group—these use UV light to break down dirt, requiring minimal maintenance.

Tools & Supplies You Need to Clean Skylights

Cleaning skylights effectively and safely requires the right tools and cleaning solutions. Here’s everything you need for streak-free, damage-free cleaning, whether you’re working on fixed, opening, or walk-on skylights.

Cleaning Tools (For Streak-Free Results)

• Microfiber cloth – Perfect for dry dusting and polishing without scratches.
• Non-abrasive sponge – Ideal for removing dirt and grime without damaging the glass.
• Soft-bristle brush – Helps clean frames and seals without causing wear.
• Squeegee – Ensures a streak-free finish when drying skylights.
• Telescopic pole – Essential for cleaning hard-to-reach skylights, especially on high ceilings and roofs.

Best Cleaning Solutions for Skylights

• Warm soapy water (mild detergent) – A gentle, effective cleaner for most skylight types. 
• White vinegar & water mixture – An eco-friendly, streak-free option that removes water stains.
• Commercial glass cleaner – Specially formulated for skylights and roof windows to prevent residue buildup.

Safety Equipment for Skylight Cleaning

• Stable ladder or extendable cleaning tool – Keeps cleaning safe and efficient, reducing the need for risky movements.
• Safety harness (for high skylights) – Essential for roof-mounted skylights to prevent falls.

Protective gloves – Shields hands from cleaning chemicals and rough surfaces.

How to Clean Skylights from Inside (Easy DIY Method)

Cleaning skylights from inside your home is quick and easy when you use the right tools and techniques. Whether your skylight is fixed, opening, or located on a high ceiling, this step-by-step guide will help you remove dirt, prevent streaks, and maintain crystal-clear glass.

Step-by-Step Guide to Cleaning Skylights from Inside

Follow these simple steps to safely clean your skylights from inside:

1. Dust the Skylight First

Use a dry microfiber cloth or a soft-bristle brush to remove loose dirt and dust buildup. If your skylight is framed, clean the edges and seals to prevent mold growth.

2. Apply the Cleaning Solution

Spray a mix of warm water and vinegar or a streak-free glass cleaner directly onto the glass. For eco-friendly cleaning, use a water-vinegar solution to break down grime naturally.

3. Wipe Gently

Use a soft sponge or microfiber cloth to gently clean the glass surface. Avoid excessive pressure, especially on triple-glazed skylights, to prevent scratches.

4. Dry with a Squeegee

Run a squeegee from top to bottom to remove excess water and prevent streaks. If water drips onto the floor, use a towel or cloth to absorb it.

5. Check for Condensation or Mold

Inspect the skylight frame and edges for signs of condensation, mold, or mildew. If present, clean with a mild anti-mold solution to prevent damage and air quality issues.

💡 Pro Tip: If your skylight is hard to reach, use a telescopic pole with a microfiber cloth attachment. This makes cleaning easier and safer without needing a ladder.

How to Clean Skylights from Outside (For Fixed & Opening Skylights)

Cleaning skylights from outside your home is essential to maximize natural light and maintain their longevity. Whether you have fixed, opening, or roof-mounted skylights, following the correct cleaning methods will ensure streak-free glass and prevent potential damage.

Safest Ways to Reach Skylights for Cleaning

Before cleaning, ensure you can safely access your skylight:

• Use a stable ladder with someone assisting – Always prioritize safety, especially for pitched roofs and high skylights.
• Try a long-reach cleaning tool (telescopic pole) – Ideal for difficult-to-reach fixed skylights.
• For very high skylights, consider hiring a professional – Roof access can be dangerous, and improper handling may lead to seal damage or leaks.

Best Method to Clean Skylights from Outside

Follow this step-by-step guide to safely clean skylights from outside:

1. Rinse with Water

Use a hose or spray bottle to remove loose debris, dust, and pollen. Avoid using a high-pressure washer, as it can damage seals and weaken the skylight structure.

2. Apply Soapy Water or Glass Cleaner

Mix warm water with mild detergent or use a streak-free glass cleaner. Avoid harsh chemicals like ammonia-based cleaners, which can damage the skylight seals over time.

3. Gently Scrub the Glass

Use a soft sponge or brush to remove stubborn dirt and bird droppings. For flat roof skylights or walk-on skylights, a soft mop works best to avoid scratches.

4. Rinse and Dry for a Streak-Free Finish

Rinse the skylight with clean water to remove any remaining soap residue. Use a squeegee to prevent water spots and streaks, working from top to bottom.

5. Inspect for Leaks or Damage

Check the edges and seals for cracks, gaps, or water leaks. Look for fogging or condensation between panes, which may indicate a seal failure. If damage is found, consider contacting a skylight specialist for repairs.

How to Clean Walk-On Skylights & Rooflights

Walk-on skylights and rooflights provide stunning panoramic rooftop views while maintaining safety and durability. Whether installed in residential homes, commercial spaces, or terrace walkways, these reinforced glass skylights require special cleaning techniques to ensure clarity, safety, and long-term performance.

Unlike traditional fixed or opening skylights, walk-on skylights are designed for foot traffic, meaning dirt, dust, and stains can accumulate faster. Follow these best practices to keep your walk-on skylights spotless and safe.

Best Methods for Cleaning Walk-On Skylights & Rooflights

• Use a Soft Mop or Microfiber Pad Instead of a Sponge

Avoid abrasive materials that can scratch or weaken the anti-slip coating on the glass. A microfiber mop or soft cleaning pad ensures streak-free results without damaging the surface.

• Avoid Pressure Washing to Prevent Seal Damage

High-pressure water jets can force water into seals, leading to leaks, condensation issues, or glazing damage. Instead, use a low-pressure water hose or spray bottle to remove debris.

• Use an Anti-Slip Cleaning Solution to Remove Stains Safely

Walk-on skylights often feature anti-slip coatings for added safety—using harsh chemicals can degrade this layer. Choose a non-abrasive, anti-slip cleaner designed for glass surfaces. For grease or stubborn stains (especially in commercial spaces), use a mild detergent mixed with warm water.

Additional Tips for Maintaining Walk-On Skylights

🔎 Regular Inspections – Check for scratches, chips, or cracks that could weaken structural integrity.
⚠ Be Cautious When Walking on Skylights – Even reinforced laminated glass skylights should be walked on carefully to prevent stress fractures.
💡 Consider Self-Cleaning Glass Options – For low-maintenance solutions, Regal Glass Group offers walk-on skylights with self-cleaning coatings, reducing the need for frequent cleaning.

Common Mistakes to Avoid When Cleaning Skylights

Cleaning skylights seems straightforward, but making these common mistakes can lead to streaks, scratches, and even long-term damage. Avoid these pitfalls to keep your skylights in perfect condition and ensure maximum natural light transmission.

Using Abrasive Materials – Scratches the Glass

Never use rough sponges, steel wool, or harsh scrubbers, as they can permanently scratch skylight glass. Instead, opt for a microfiber cloth or non-abrasive sponge to clean safely. If your skylight has a special UV or self-cleaning coating, scratches can reduce its effectiveness.

Skipping Regular Cleaning – Leads to Stubborn Stains & Reduced Light Transmission

Skylights accumulate dust, pollen, and bird droppings, which can become hard to remove if left too long. Over time, dirt buildup can reduce natural light by up to 40%, affecting energy efficiency and indoor brightness. Aim to clean skylights at least twice a year—spring and autumn are ideal times for maintenance.

Ignoring the Seals & Frame – Dirt Buildup Can Cause Leaks

Many people only clean the glass and forget the seals and frames, where dirt, moss, and moisture can accumulate. Neglecting these areas can lead to seal deterioration, leaks, and condensation issues. Always wipe down the skylight frame and inspect for any cracks or gaps that might need sealing.

Cleaning in Direct Sunlight – Causes Streaks Due to Rapid Drying

Cleaning skylights when the sun is at its peak can cause cleaning solutions to dry too quickly, leaving unsightly streaks. The best time to clean skylights is early morning or late afternoon, when temperatures are cooler. If cleaning in warmer weather, rinse immediately with clean water and dry with a squeegee for a streak-free finish.

FAQ – Answering the Most Popular Skylight Cleaning Questions

Skylight maintenance is a common concern for homeowners and businesses. Below, we’ve answered the most frequently asked questions about skylight cleaning.

Can you clean skylights from inside?

Yes, you can! Use a long-reach microfiber pole and a vinegar-water solution for best results. Fixed skylights are easier to clean from inside with telescopic tools. If condensation or mold appears inside the skylight, wipe it with a mild anti-mold solution to prevent damage.

What’s the best cleaner for skylights?

Mild soapy water or a vinegar-water mixture is the best option for streak-free cleaning. For eco-friendly cleaning, mix equal parts white vinegar and warm water. Avoid ammonia-based cleaners, as they can damage skylight seals and coatings.

How often should skylights be cleaned?

At least twice a year – The best times for skylight maintenance are spring and autumn. In high-pollution areas or if skylights are exposed to trees, bird droppings, or heavy dust, consider quarterly cleaning. Self-cleaning glass skylights require minimal maintenance, as rain naturally washes away dirt.

Do skylights have self-cleaning glass?

Yes! All skylights from Regal Glass Group come with self-cleaning glass. Self-cleaning skylights use UV light to break down dirt, which is then washed away by rain. This feature reduces cleaning frequency and helps keep skylights clear and streak-free year-round.

Get High-Quality, Easy-to-Maintain Skylights from Regal Glass Group

Looking for skylights that stay cleaner for longer with minimal effort? Regal Glass Group offers a range of premium-quality skylights designed for maximum light, energy efficiency, and easy maintenance. Whether you need fixed, opening, or walk-on skylights, we have the perfect solution for your home or business.

Why Choose Regal Glass Group Skylights?

• Self-Cleaning Glass Options Available

Say goodbye to frequent skylight cleaning! Our self-cleaning glass skylights use UV technology and rainwater to naturally break down dirt and grime.

• Low-Maintenance Fixed & Opening Skylights

Designed with durability and efficiency in mind, our triple-glazed skylights feature argon gas-filled glass for better insulation and reduced condensation.

• Expert Installation & Free UK Delivery

We provide professional installation services and fast, free delivery to most UK locations to ensure a seamless experience from purchase to installation.

Discover the Best Skylight for Your Space

• Homeowners: Upgrade your living room, kitchen, bathroom, or loft with skylights that keep your home brighter and more energy-efficient.
• Businesses & Architects: Choose walk-on skylights, commercial-grade rooflights, and bespoke skylight solutions for modern, stylish designs.

Contact Regal Glass Group Today for Expert Advice!

Have questions about choosing the right skylight? Our team of skylight specialists is here to help!

📍 Visit our website: skylights.co.uk
📧 Email us at: office@skylights.co.uk
📞 Call us at: 020 8135 2244

Transform your space with premium skylights – easy to maintain, built to last!