Replacing an RV skylight is essential for maintaining comfort and preventing leaks in your recreational vehicle. Over time, skylights can crack, fade, or become brittle, making replacement necessary. In this guide, you’ll learn how to replace your RV skylight efficiently and correctly.
Why Replace Your RV Skylight?
A damaged skylight can cause several issues, including:
- Water Leaks – Cracks allow water to seep in, leading to mold and rot.
- Heat Loss or Gain – An old skylight may not insulate properly, affecting interior temperatures.
- Reduced Visibility – Fogged or discolored skylights reduce natural light inside your RV.
By replacing your RV skylight, you improve insulation, lighting, and protection from the elements
Factors That Force You to Replace an RV Skylight
An RV skylight enhances natural light and ventilation inside your recreational vehicle. However, over time, various factors can damage it, making replacement necessary. Ignoring a faulty skylight can lead to leaks, energy inefficiency, and structural issues. Below are the key factors that force you to replace your RV skylight.
1. Cracks and Structural Damage
One of the most common reasons for RV skylight replacement is cracking. This can occur due to:
- Hailstorms – Impact from hail can create visible cracks.
- Tree Branches – Overhanging branches can scratch or break the skylight.
- Aging Plastic – UV exposure causes the material to weaken and crack over time.
Even small cracks can lead to water leaks, making immediate replacement crucial.
2. Leaks and Water Damage
A leaking RV skylight can cause severe damage, including:
- Roof Rot – Continuous water exposure weakens the RV roof structure.
- Mold and Mildew – Excess moisture promotes mold growth inside your RV.
- Interior Damage – Water stains, peeling wallpaper, and ceiling deterioration.
If you notice water pooling around your skylight after rain, it’s time for a replacement.
3. Yellowing or Discoloration
Over time, skylights may become discolored due to:
- Prolonged Sun Exposure – UV rays cause the skylight to turn yellow or brown.
- Dirt and Pollution – Built-up grime reduces light transmission.
- Chemical Reactions – Some cleaning products accelerate discoloration.
A faded skylight blocks natural light and reduces the aesthetic appeal of your RV interior.
4. Poor Insulation and Energy Loss
An old or damaged RV skylight can affect your vehicle’s temperature control. Issues include:
- Heat Loss in Winter – Cracks and poor sealing let warm air escape.
- Heat Gain in Summer – A deteriorated skylight allows excessive heat inside.
- Condensation Issues – Inadequate insulation leads to interior moisture buildup.
Upgrading to a high-quality, insulated skylight improves energy efficiency and comfort.
5. Loose or Failing Seals
A properly sealed RV skylight is essential for waterproofing. Over time, seals can:
- Dry Out and Crack – Exposure to extreme temperatures weakens sealants.
- Peel or Lift – Improper installation or age causes the seal to detach.
- Attract Dirt and Debris – Loose seals collect dust, reducing adhesion.
If resealing doesn’t fix the problem, replacing the entire skylight is the best solution.
Methods to Replace an RV Skylight
Replacing an RV skylight is a crucial maintenance task that ensures proper lighting, insulation, and leak prevention. Whether your skylight is cracked, leaking, or discolored, knowing the right replacement method is essential. Below, we’ll explore the most effective ways to replace your RV skylight step by step.
1. DIY Replacement Method
For RV owners comfortable with repairs, the DIY method is a cost-effective way to replace a skylight. Follow these steps for a successful installation.
Step 1: Gather Your Tools and Materials
Before starting, make sure you have:
- A new RV skylight (correct size and shape)
- Butyl tape or putty tape
- RV-grade self-leveling sealant
- Screwdriver or drill
- Utility knife and putty scraper
- Clean cloth and rubbing alcohol
Step 2: Remove the Old Skylight
- Clean the surrounding area to prevent debris from falling inside.
- Use a screwdriver or drill to remove the screws securing the skylight.
- Carefully cut through the old sealant with a utility knife.
- Lift the old skylight off the roof and remove leftover adhesive with a putty scraper.
Step 3: Prepare the Roof Surface
- Clean the area thoroughly with rubbing alcohol to remove residue.
- Ensure the surface is dry before applying the new sealant.
Step 4: Install the New Skylight
- Apply butyl tape around the skylight opening for a watertight seal.
- Position the replacement RV skylight and align it properly.
- Secure it with screws, tightening evenly to prevent warping.
Step 5: Seal the Skylight
- Apply a generous layer of self-leveling sealant around the edges.
- Spread it evenly, ensuring no gaps remain.
- Let the sealant cure for at least 24 hours before exposing it to rain or washing.
2. Professional Installation Method
If you prefer a hassle-free and expert installation, hiring an RV technician is the best option.
Advantages of Professional Installation:
✅ Guaranteed proper fitting and sealing
✅ Reduced risk of leaks and future repairs
✅ Time-saving and stress-free process
A professional will remove the old RV skylight, clean the surface, and install the new one with high-quality materials, ensuring durability and longevity.
3. Temporary Skylight Repair Method
If you’re on the road and need a quick fix before a full replacement, follow these steps:
- Seal Cracks with RV Sealant – Apply a waterproof sealant over small cracks to prevent leaks.
- Use Clear Tape for Emergency Repairs – Heavy-duty clear tape can provide a short-term solution.
- Cover with a Tarp – If the skylight is severely damaged, secure a tarp over it until you reach a repair shop.
While this method is not a permanent solution, it helps protect your RV skylight from further damage.
Essential Tools to Replace an RV Skylight
Replacing an RV skylight requires the right tools to ensure a secure fit, proper sealing, and long-lasting durability. Whether you’re a DIY enthusiast or preparing for professional installation, having the correct equipment is essential. Below is a comprehensive list of the essential tools you’ll need for a successful RV skylight replacement.
1. Screwdriver or Power Drill
A screwdriver or power drill is necessary to:
- Remove the screws from the old skylight.
- Secure the new skylight in place.
- Prevent over-tightening, which can cause cracks.
For convenience, use a cordless drill with adjustable torque to avoid damaging the RV’s roof.
2. Utility Knife
A sharp utility knife helps with:
- Cutting through old sealant and caulking.
- Trimming excess butyl tape for a clean finish.
- Removing any stuck debris around the skylight opening.
Using a retractable blade ensures safety and precision.
3. Putty Scraper or Plastic Scraper
To achieve a smooth installation, a putty scraper is essential for:
- Removing old adhesive and sealant.
- Scraping off dried caulk without damaging the RV’s roof.
- Prepping the surface for a fresh, secure seal.
A plastic scraper is recommended to prevent scratches on fiberglass or rubber roofs.
4. Butyl Tape or Putty Tape
Butyl tape provides a strong, waterproof seal between the RV roof and the new skylight. It is essential for:
- Preventing leaks and water damage.
- Creating a tight bond between surfaces.
- Ensuring a long-lasting installation.
Apply it evenly around the skylight opening before placing the new unit.
5. Self-Leveling RV Sealant
A self-leveling RV sealant is crucial for waterproofing and durability. It helps by:
- Sealing the edges of the skylight to prevent leaks.
- Providing a flexible, weather-resistant barrier.
- Ensuring a professional, smooth finish.
Choose a UV-resistant, non-shrinking sealant for maximum protection.
6. Rubbing Alcohol and Clean Rags
Proper surface preparation is key to a long-lasting installation. Use:
- Rubbing alcohol to clean the skylight opening.
- Lint-free rags to wipe away dust, dirt, and adhesive residue.
- Mild soap and water if heavy grime is present.
A clean surface ensures strong adhesion and prevents future leaks.
7. Measuring Tape
Accurate measurements are necessary for:
- Ensuring the new RV skylight fits perfectly.
- Aligning the screw holes properly.
- Applying the correct amount of sealant and butyl tape.
Always double-check measurements before installing the replacement skylight.
8. Ladder or Roof Access Equipment
Since the RV skylight is on the roof, you’ll need:
- A stable ladder for safe access.
- Non-slip knee pads for comfort during installation.
- A harness if working on a tall or sloped RV roof.
Safety is a priority, so use proper climbing gear and avoid working in wet or windy conditions.
Steps to Replace an RV Skylight
Replacing an RV skylight is essential for preventing leaks, improving insulation, and maintaining proper lighting inside your vehicle. Whether your skylight is cracked, leaking, or discolored, following the correct step-by-step process ensures a successful and long-lasting installation.
1. Gather the Necessary Tools and Materials
Before starting the RV skylight replacement, ensure you have:
✔ New RV skylight (correct size and shape)
✔ Screwdriver or power drill
✔ Utility knife and putty scraper
✔ Butyl tape or putty tape
✔ Self-leveling RV sealant
✔ Rubbing alcohol and clean rags
✔ Measuring tape
✔ Ladder for roof access
2. Remove the Old Skylight
Step 1: Clean the Skylight Area
- Remove dirt and debris from the surrounding surface.
- This prevents contamination during installation.
Step 2: Unscrew and Detach the Old Skylight
- Use a screwdriver or power drill to remove the screws.
- Set the screws aside if they are still in good condition.
Step 3: Cut Through the Old Sealant
- Use a utility knife to carefully cut through the old sealant.
- Gently lift the old RV skylight off the roof.
Step 4: Remove Old Adhesive and Clean the Surface
- Use a putty scraper to remove leftover sealant and adhesive.
- Clean the area with rubbing alcohol and let it dry completely.
3. Install the New Skylight
Step 1: Apply Butyl Tape Around the Skylight Opening
- Place butyl tape or putty tape around the perimeter of the opening.
- This creates a waterproof barrier and prevents leaks.
Step 2: Position the New Skylight
- Align the replacement RV skylight with the opening.
- Ensure a proper fit before securing it in place.
Step 3: Secure the Skylight with Screws
- Use a power drill or screwdriver to fasten the screws.
- Tighten them evenly to prevent cracking or warping.
4. Seal the Skylight for Waterproofing
Step 1: Apply Self-Leveling Sealant
- Use RV-grade self-leveling sealant around the edges of the skylight.
- This ensures a waterproof and weather-resistant seal.
Step 2: Smooth and Spread the Sealant
- Make sure there are no gaps or bubbles in the sealant.
- Apply an extra layer if needed for added protection.
Step 3: Let the Sealant Cure
- Allow at least 24 hours for the sealant to fully cure.
- Avoid driving or exposing the skylight to rain during this period.
5. Perform a Final Inspection
✔ Check for any gaps in the sealant and reapply if necessary.
✔ Press lightly on the skylight to ensure it’s securely installed.
✔ Clean off any excess sealant for a neat finish.
Do You Need a Professional to Replace an RV Skylight, or Can You Do It Yourself?
Replacing an RV skylight is a necessary maintenance task when dealing with cracks, leaks, or discoloration. But should you hire a professional or handle it yourself? The answer depends on your skill level, available tools, and comfort with DIY projects. Let’s explore both options to help you decide the best approach for your RV skylight replacement.
1. Replacing an RV Skylight Yourself (DIY Method)
If you enjoy hands-on projects and have the right tools, replacing an RV skylight yourself can be a cost-effective solution.
Pros of DIY Skylight Replacement
✅ Saves Money – Avoids labor costs, making it a budget-friendly option.
✅ Full Control – Allows you to choose the best materials and ensure a proper fit.
✅ Learn a New Skill – Enhances your knowledge of RV maintenance.
Cons of DIY Skylight Replacement
❌ Risk of Mistakes – Incorrect installation may lead to leaks and future repairs.
❌ Requires Tools & Materials – You need proper sealant, butyl tape, and a drill.
❌ Time-Consuming – It takes a few hours, especially if it’s your first time.
Who Should Choose the DIY Method?
🔹 RV owners with basic handyman skills.
🔹 Those comfortable working on a ladder or RV roof.
🔹 Anyone looking to save money on installation costs.
2. Hiring a Professional for RV Skylight Replacement
For those who prefer a hassle-free experience, hiring an RV repair specialist is the best option.
Pros of Professional Installation
✅ Expert Precision – Ensures proper alignment and sealing.
✅ Time-Saving – The job is completed faster with professional tools.
✅ Warranty Coverage – Some professionals offer guarantees on their work.
Cons of Professional Installation
❌ Higher Cost – Labor and service fees can be expensive.
❌ Scheduling Delays – Availability of professionals may cause waiting times.
Who Should Hire a Professional?
🔹 RV owners who lack DIY experience.
🔹 Anyone concerned about roof damage or improper sealing.
🔹 Those who want a worry-free installation with a professional guarantee.
Common Mistakes When Replacing an RV Skylight and Their Solutions
Replacing an RV skylight is a crucial maintenance task, but even experienced RV owners can make mistakes during installation. These errors can lead to leaks, poor insulation, or even costly repairs down the road. Below, we’ll discuss the most common mistakes when replacing an RV skylight and provide practical solutions to avoid them.
1. Choosing the Wrong Skylight Size
❌ Mistake:
One of the most frequent errors is buying the wrong size skylight. A skylight that is too big or too small won’t fit properly, leading to gaps and potential leaks.
✅ Solution:
✔ Measure the skylight opening, not just the old skylight.
✔ Double-check dimensions before purchasing a replacement.
✔ Consult your RV manufacturer’s specifications for the correct size.
2. Not Removing Old Sealant Properly
❌ Mistake:
Leaving behind old sealant, caulk, or debris can prevent the new skylight from sealing correctly, increasing the risk of leaks.
✅ Solution:
✔ Use a putty scraper or plastic scraper to remove all old adhesive and sealant.
✔ Clean the surface with rubbing alcohol to ensure a smooth bonding surface.
✔ Let the area dry completely before applying new sealant.
3. Over-Tightening or Under-Tightening Screws
❌ Mistake:
- Over-tightening screws can crack the skylight, leading to water damage.
- Under-tightening screws can leave gaps, causing leaks and reducing stability.
✅ Solution:
✔ Use a power drill with adjustable torque or a manual screwdriver to avoid over-tightening.
✔ Tighten screws evenly to prevent warping.
✔ Check the skylight after installation to ensure it sits flush against the roof.
4. Skipping the Butyl Tape or Putty Tape
❌ Mistake:
Some RV owners skip using butyl tape, relying only on sealant. However, butyl tape creates an essential waterproof barrier between the skylight and the RV roof.
✅ Solution:
✔ Apply a continuous strip of butyl tape around the skylight opening before installing the new skylight.
✔ Press the skylight down firmly to ensure a watertight seal.
✔ Trim excess tape after securing the skylight.
5. Using the Wrong Type of Sealant
❌ Mistake:
Using the wrong sealant can cause premature cracking, shrinking, or peeling, leading to leaks.
✅ Solution:
✔ Always use self-leveling RV sealant, which spreads evenly and resists weather damage.
✔ Avoid household silicone or general-purpose caulk, as they won’t bond properly to RV materials.
✔ Apply sealant generously around the skylight edges for maximum protection.
6. Not Letting the Sealant Cure Properly
❌ Mistake:
Some RV owners rush the process and don’t allow the sealant to cure before exposing it to rain, washing, or travel. This can weaken the seal and cause leaks.
✅ Solution:
✔ Let the sealant cure for at least 24 hours before exposing it to water.
✔ Park your RV in a dry, shaded area during curing.
✔ Check for gaps or bubbles in the sealant and reapply if necessary.
7. Ignoring Roof Condition Before Installation
❌ Mistake:
Installing a new skylight on a damaged, cracked, or dirty RV roof can lead to improper sealing and long-term problems.
✅ Solution:
✔ Inspect the roof membrane or fiberglass surface before installation.
✔ Repair any cracks, soft spots, or leaks in the surrounding area.
✔ Ensure the surface is completely clean and dry before placing the new skylight.
Safety Precautions to Replace an RV Skylight
Replacing an RV skylight involves working at heights, handling sharp tools, and ensuring a watertight installation. To prevent injuries and mistakes, it’s essential to follow the proper safety precautions. Whether you’re a DIYer or an experienced RVer, these guidelines will help ensure a safe and successful skylight replacement.
1. Use Proper Roof Safety Measures
⚠️ Risk: Slipping, falling, or losing balance on the RV roof.
✅ Precautions:
✔ Work on a dry day to prevent slipping.
✔ Wear non-slip shoes with good grip.
✔ Use a stable ladder and ensure it’s positioned on solid ground.
✔ If your RV roof is high or sloped, use a safety harness for extra security.
2. Avoid Working in Extreme Weather
⚠️ Risk: Strong winds, rain, or extreme heat affecting stability and sealant application.
✅ Precautions:
✔ Choose a calm, dry day for installation.
✔ Avoid windy conditions that could make handling materials difficult.
✔ If working in hot weather, take breaks to avoid heat exhaustion.
3. Wear Protective Gear
⚠️ Risk: Cuts, eye injuries, and exposure to chemicals.
✅ Precautions:
✔ Wear work gloves to protect your hands from sharp tools and rough edges.
✔ Use safety glasses when scraping off old sealant or using a drill.
✔ If using self-leveling sealant, wear a mask to avoid inhaling fumes.
4. Handle Tools Carefully
⚠️ Risk: Cuts, punctures, or damage to the RV roof.
✅ Precautions:
✔ Use a sharp utility knife carefully when cutting through old sealant.
✔ Handle power drills with a steady grip to avoid stripping screws.
✔ Keep tools secured in a tool belt or within reach to avoid dropping them.
5. Ensure Proper Ladder Use
⚠️ Risk: Falls due to improper ladder placement.
✅ Precautions:
✔ Use a sturdy, well-positioned ladder with anti-slip feet.
✔ Have someone hold the ladder while climbing for extra stability.
✔ Avoid leaning too far over the edge—move the ladder instead.
6. Work with a Partner if Possible
⚠️ Risk: Difficulty in handling large skylights alone.
✅ Precautions:
✔ Having a helper can make positioning the skylight easier.
✔ A partner can hand you tools to prevent unnecessary movements.
✔ In case of an emergency, someone will be there to assist.
7. Use the Right Sealant and Adhesive Properly
⚠️ Risk: Improper sealing causing leaks and water damage.
✅ Precautions:
✔ Use RV-grade self-leveling sealant for proper adhesion.
✔ Apply sealant evenly and allow it to fully cure before exposing it to water.
✔ Avoid using household silicone, as it won’t bond properly with RV materials.
8. Inspect Your Work Before Finishing
⚠️ Risk: Missing gaps or loose screws leading to future issues.
✅ Precautions:
✔ Check all screws, sealant, and edges for proper installation.
✔ Look for gaps, bubbles, or uneven sealing and reapply if necessary.
✔ Ensure the skylight sits flush against the roof with no lifted edges.
More related details will be available on Flamingo Motorhomes.