Can I Hang UV Protective Film in the Well of a Skylight? A Comprehensive Guide

The short answer is yes, you can hang UV protective film in the well of a skylight, and in many cases, it’s a highly effective solution for reducing harmful UV radiation and heat gain. However, successful implementation hinges on careful consideration of factors such as film type, skylight construction, installation method, and potential for condensation. This article will delve into these considerations, offering a detailed guide to help you determine if UV film is the right solution for your skylight and how to ensure a successful installation.

Table of Contents

The Case for UV Protective Film in Skylight Wells

Skylights, while beneficial for natural light, can also become significant sources of heat gain and UV radiation, leading to uncomfortable indoor temperatures, faded furnishings, and potential health risks. Applying UV protective film directly to the skylight glass is often the first solution considered, but this can be problematic due to difficulty accessing the exterior, safety concerns related to working at heights, and potential voiding of the skylight warranty if altered. Hanging the film within the well of the skylight, essentially creating a secondary barrier, offers a viable alternative, presenting several advantages:

Easier Installation: Installation within the well is typically much easier and safer than attempting to apply film to the exterior of the skylight.
Reduced Heat Gain: UV film effectively blocks a significant portion of the sun’s energy, reducing heat transfer and lowering indoor temperatures.
UV Protection: Blocking UV radiation protects furniture, fabrics, and artwork from fading and deterioration.
Glare Reduction: Certain films can also reduce glare, making the space more comfortable.
Cost-Effective: It can be a relatively inexpensive solution compared to replacing the skylight.
Reversibility: The installation can be reversed more easily if needed, minimizing long-term commitment.

However, the success of this approach depends on several crucial factors addressed in the FAQs below.

Frequently Asked Questions (FAQs) About UV Film in Skylight Wells

FAQ 1: What type of UV protective film is best suited for skylight wells?

Consider these factors when choosing film:

UV Rejection: Prioritize films that block at least 99% of UVA and UVB rays. Look for specifications that clearly state the percentage of UV rejection.
Visible Light Transmission (VLT): This determines how much light passes through. Choose a VLT that provides adequate brightness while minimizing glare. A lower VLT will block more light.
Total Solar Energy Rejected (TSER): This measures the film’s ability to block solar heat. A higher TSER value indicates better heat rejection.
Film Thickness: Thicker films offer better durability but can be more challenging to install properly.
Adhesive Type: Choose a film with a high-quality, pressure-sensitive adhesive designed for interior use.
Tint: Consider the tint. Clear films offer UV protection without altering the appearance of the skylight. Tinted films can further reduce glare and heat.
Professional Grade vs. DIY: Professional-grade films often offer better performance and longevity but require skilled installation. DIY films are more accessible but may not offer the same level of performance.

FAQ 2: How do I properly measure the skylight well for film installation?

Accuracy is crucial.

Measure the Inside Dimensions: Carefully measure the inside width, length, and depth of the skylight well. Ensure you are measuring the area where the film will be attached.
Account for Mounting Hardware: If you plan to use a frame or other mounting hardware, subtract the thickness of the hardware from your measurements to ensure a snug fit.
Measure Multiple Points: Measure at different points to account for any variations in the well’s dimensions. Use the smallest measurement to ensure the film will fit.
Add a Buffer: Add a small buffer (e.g., 1/8 inch) to your measurements to allow for minor adjustments during installation.

FAQ 3: What materials do I need for a successful installation?

Gather these materials:

UV Protective Film: Choose your desired film based on the criteria outlined in FAQ 1.
Measuring Tape: For accurate measurements.
Scissors or Utility Knife: For cutting the film to size.
Straight Edge or Ruler: For guiding cuts and ensuring straight lines.
Spray Bottle with Soap Solution: A mild solution of water and dish soap (a few drops of soap per bottle) is used to lubricate the glass and film during installation.
Squeegee: For removing air bubbles and smoothing the film onto the glass.
Lint-Free Cloth: For cleaning the glass and wiping away excess water.
Ladder or Step Stool (if needed): To safely reach the skylight well.
Mounting Hardware (optional): This could include a frame, Velcro strips, or tension rods, depending on your chosen installation method.

FAQ 4: What are the different methods for hanging the UV film in the skylight well?

Consider these hanging methods:

Custom Frame: Building a lightweight frame (e.g., using wood or aluminum) to hold the film provides a clean and professional look. The frame can be attached to the skylight well using screws or adhesive.
Tension Rods: Tension rods, commonly used for curtains, can be placed across the skylight well to hold the film in place.
Velcro Strips: Attaching Velcro strips to the skylight well and the edges of the film offers a simple and reversible installation method.
Direct Adhesion (with caution): In some cases, the film can be directly adhered to the skylight well using its adhesive backing. However, this method can be more challenging and may not be suitable for all skylight well materials.

FAQ 5: How do I prevent condensation from forming between the film and the skylight?

Condensation is a concern.

Ensure Proper Ventilation: Adequate ventilation within the room can help reduce humidity levels and minimize condensation.
Choose Breathable Film: Opt for a film that allows some degree of moisture permeability.
Seal the Edges (with caution): While complete sealing might seem ideal, it can trap moisture. A partially sealed edge may allow some airflow.
Desiccant Packs: Placing small desiccant packs within the skylight well can help absorb moisture. However, they will need to be replaced periodically.

FAQ 6: Will hanging UV film affect the skylight warranty?

Potentially, yes.

Check the Warranty: Review the skylight warranty carefully to determine if applying film or modifying the skylight in any way will void the warranty.
Contact the Manufacturer: If you are unsure, contact the skylight manufacturer to inquire about their policy on UV film.
Consider Non-Permanent Options: Using a non-permanent installation method, such as Velcro or tension rods, may minimize the risk of voiding the warranty.

FAQ 7: Can I use any cleaning products on the UV protective film?

No. Harsh chemicals can damage the film.

Use Mild Soap and Water: Clean the film with a soft cloth and a mild solution of water and dish soap.
Avoid Abrasive Cleaners: Do not use abrasive cleaners, solvents, or ammonia-based products, as these can scratch or damage the film.
Dry with a Soft Cloth: After cleaning, dry the film with a clean, lint-free cloth.

FAQ 8: How long will UV protective film last in a skylight well?

Lifespan varies based on quality and environment.

Film Quality: Higher-quality films typically last longer.
Sun Exposure: The amount of sun exposure will affect the film’s longevity.
Climate: Extreme temperatures and humidity can shorten the film’s lifespan.
Installation Quality: Proper installation will help prolong the film’s life.
Typical Lifespan: Expect most quality films to last between 5-10 years. Monitor the film for signs of discoloration, peeling, or cracking, which indicate it needs to be replaced.

FAQ 9: Will hanging UV film completely eliminate heat gain from the skylight?

No, but it will significantly reduce it.

Heat Reduction, Not Elimination: UV film primarily blocks UV radiation and a portion of infrared radiation, which contributes to heat gain.
Total Solar Energy Rejected (TSER): The TSER value of the film indicates the percentage of total solar energy that is blocked. A higher TSER value means more heat reduction.
Additional Measures: Consider other measures to further reduce heat gain, such as installing a shade or blinds.

FAQ 10: Is professional installation necessary, or can I do it myself?

DIY is possible, but professional installation ensures quality.

DIY Feasibility: Installing UV film in a skylight well is generally a DIY-friendly project, especially with simpler installation methods like Velcro or tension rods.
Professional Benefits: Professional installers have experience and specialized tools to ensure a smooth, bubble-free installation and proper adhesion. They can also advise on the best film type for your specific needs.
Cost vs. Quality: Consider the cost of professional installation versus the potential for errors and the long-term performance of the film.

FAQ 11: What are the potential downsides of hanging UV film in a skylight well?

Consider these potential downsides:

Aesthetic Changes: The film may slightly alter the appearance of the skylight and the light entering the room.
Condensation Issues: As mentioned earlier, condensation can be a concern if not properly addressed.
Difficulty Cleaning: Cleaning the film within the skylight well can be challenging, especially in hard-to-reach areas.
Potential for Peeling or Bubbling: If not installed properly, the film may peel or bubble over time.

FAQ 12: How do I remove UV protective film from the skylight well if needed?

Removal can be tricky, but is generally manageable.

Heat Application: Use a hairdryer or heat gun to gently warm the film. This will soften the adhesive and make it easier to peel off.
Peeling Carefully: Slowly and carefully peel the film away from the skylight well, starting at one corner.
Adhesive Remover: If adhesive residue remains, use a commercial adhesive remover or a mixture of water and baking soda to soften and remove the residue.
Clean the Surface: Once the film and adhesive are removed, clean the surface with a mild soap and water solution to remove any remaining residue.

By carefully considering these factors and following these guidelines, you can successfully install UV protective film in the well of your skylight, creating a more comfortable and energy-efficient living space.