Short Answer
Skylight replacement involves removing the existing skylight, evaluating the surrounding roof deck and framing, installing a new skylight with proper flashing integrated with the roofing system, and ensuring proper interior finishing. The best time to replace a skylight is during a roof replacement, when the surrounding roofing is already removed and access is easiest. A VELUX Certified Installer has been trained in proper skylight installation methods.
Detailed Explanation
Skylight replacement is a project that involves both the roof and the interior. The process includes: removing the existing skylight and evaluating the surrounding roof deck for damage — water intrusion around old skylights often causes deck rot that must be repaired. Selecting a replacement skylight — modern skylights offer better energy performance, laminated glass for safety and UV protection, and options like venting and rain sensors. Installing the new skylight with proper flashing — the flashing kit must be compatible with both the skylight and the roofing material, and must be properly integrated with the underlayment and shingles. Ensuring the interior opening is properly finished — the drywall, trim, and interior flashing must be correctly installed to prevent air infiltration and condensation. The best time to replace a skylight is during a roof replacement, because the old roofing is already removed, providing full access to the skylight flashing and the surrounding deck. Replacing a skylight separately requires removing and reinstalling the surrounding roofing, which adds cost and risk. If a skylight is more than 15-20 years old, has a history of leaking, or has failed seals (fogging between glass panes), replacement during a roof project is typically the most cost-effective approach. A VELUX Certified Installer has been trained in VELUX's specific installation methods and can offer enhanced warranty options on VELUX products.
Why It Matters
Skylight replacement done correctly prevents future leaks and water damage. Doing it during a roof replacement saves money and ensures proper integration with the new roofing system.
When Repair Makes Sense
The skylight is relatively new and the leak is caused by failed sealant or flashing that can be replaced without removing the skylight.
When Replacement Makes Sense
The skylight is old, has failed seals, has a history of leaking, or is being replaced as part of a roof replacement project.
Questions to Ask Your Contractor
- ?How old are my skylights?
- ?Should they be replaced during my roof replacement?
- ?What flashing will be used and how will it integrate with my new roof?
- ?Are you a VELUX Certified Installer?