Replacing a roof is a big investment—and it’s also the best time to decide whether older roof penetrations like skylights and attic fans should be upgraded at the same time. In Hemet’s sun, heat, and seasonal winds, these components can directly affect leak risk, energy bills, indoor comfort, and warranty outcomes.
At All Seasons Roofing, our Hemet Roofing experts recommend treating a roof replacement like a full system upgrade, not just new shingles or new underlayment. Below is a clear, homeowner-friendly guide to help you decide if replacing old skylights or attic fans during a roof replacement is the smart move.
Why This Question Matters During a Roof Replacement
A new roof is only as reliable as its most vulnerable points. Skylights and attic fans are among the most common sources of problems because they require:
- Flashing systems (metal or composite barriers that channel water away)
- Seals and gaskets that age and shrink
- Proper integration with underlayment, shingles/tiles, and roof deck
Our Hemet Roofing experts recommend reviewing skylights and ventilation devices during roof replacement because once the new roofing is installed, fixing issues later often means cutting into brand-new materials—which can be more expensive and may shorten the life of your new roof system.
Should You Replace Old Skylights When You Replace the Roof?
In many cases, yes—especially if the skylight is more than 10–15 years old.Hemet Roofing experts recommend replacing skylights during roof replacement when any of the following is true:
- The skylight is older and approaching end-of-life (common lifespan is ~10–20 years depending on quality and exposure)
- You’ve seen staining, bubbling drywall, or fogging between glass panes
- The skylight is acrylic dome style (often less efficient and more prone to seal issues)
- There have been past leak repairs around the skylight
- You’re upgrading roofing materials and want matching warranties and modern flashing kits
Key benefits of replacing skylights during a roof job
- Lower labor cost compared to doing it later: The roof is already open and accessible.
- Better leak prevention: New skylights typically come with manufacturer-specific flashing systems designed to integrate correctly.
- Improved comfort and efficiency: Modern skylights can reduce heat gain and UV damage with better glazing and coatings.
- Cleaner finish: New skylight curb/flashing looks better than patchwork around an old unit.
When you might keep an existing skylight
Our Hemet Roofing experts recommend keeping a skylight only when it’s relatively new, proven leak-free, and compatible with modern flashing and underlayment methods. Even then, a best practice is to replace the flashing system (or at minimum, rebuild it to current standards) during the reroof.
Skylight Red Flags Hemet Homeowners Shouldn’t Ignore
If you’re on the fence, these are strong signals a skylight replacement is due:
- Condensation or fogging between panes (failed insulated glass seal)
- Cracked acrylic domes
- Soft or darkened roof decking around the opening (hidden moisture)
- Caulk-dependent “repairs” around flashing (caulk is not a permanent waterproofing strategy)
- Drafts in winter or noticeable heat radiating in summer
Hemet Roofing experts recommend thinking of skylights like windows: if the roof is getting replaced, it’s often wise to replace aging skylights too—because a new roof around an old skylight can still leak.
Should You Replace Attic Fans When You Replace the Roof?
It depends on whether the fan is still effective—and whether it’s even the best ventilation strategy for your attic.In Hemet’s warmer climate, attic ventilation matters. Hot attics can increase cooling loads and shorten the life of roofing materials. But not all attic fans (especially older electric ones) are automatically helpful.Hemet Roofing experts recommend evaluating attic fans during roof replacement for these reasons:
- Fans often sit on roof penetrations with flashing that can fail over time.
- Old motors can seize or run inefficiently.
- Some fans create negative pressure, pulling conditioned air from the house if the attic isn’t properly balanced with intake vents.
Replace the attic fan if:
- The unit is loud, rattling, rusted, or not running reliably
- You see water staining around the fan housing or curb
- The fan is undersized for attic volume
- Your new roof plan includes a better system (like ridge vents + soffit vents) that makes the fan unnecessary
- You want a modern upgrade like a solar attic fan (often lower operating cost)
Keep the attic fan if:
- It’s newer, quiet, properly flashed, and part of a balanced ventilation design
- Your attic lacks the structure for ridge ventilation and the fan is the most practical option
Even if you keep it, Hemet Roofing experts recommend having the flashing inspected and rebuilt as needed during the reroof—because a fan is still a roof opening.
A Smarter Ventilation Question: Do You Need an Attic Fan at All?
Many homeowners ask about fans, but the bigger goal is balanced ventilation: intake low (soffit) and exhaust high (ridge or roof vents). Done right, it passively moves heat and moisture out without relying on a motor.Hemet Roofing experts recommend asking your roofer to evaluate:
- Existing intake (soffit vents, eave vents)
- Existing exhaust (ridge vents, roof vents, gable vents, fans)
- Attic insulation levels and air sealing (which affects how ventilation performs)
Sometimes, replacing an old attic fan is less beneficial than upgrading to a continuous ridge vent system—or improving intake ventilation so the attic can “breathe” properly.
Cost & Timing: Why Bundling These Upgrades Usually Saves Money
Replacing skylights or attic fans during a roof replacement is typically more cost-effective because:
- Labor overlaps (access, tear-off, underlayment work)
- Proper flashing integration is easier when the roof is already in progress
- You reduce the chance of having to disturb your new roof later
Hemet Roofing experts recommend budgeting for these items upfront so you’re not forced into a mid-project decision. A good roofing contractor will provide line items for:
- Skylight replacement (unit + flashing + labor)
- Attic fan replacement or ventilation redesign
- Wood repair allowance (if decking around openings is damaged)
Warranty & Leak Liability: The Overlooked Reason to Replace Old Units
Here’s a practical reality: if a skylight or attic fan fails after your new roof is installed, it can create confusion over who’s responsible—the roofer, the skylight manufacturer, or the installer of the old unit.Hemet Roofing experts recommend aligning ages and warranties when possible:
- New roof + new skylight flashing kits = fewer compatibility issues
- Fewer “legacy” penetrations = fewer weak points
- Cleaner documentation for workmanship and product warranties
Quick Checklist: What All Seasons Roofing Recommends Before You Decide
Hemet Roofing experts recommend you ask these questions during your roof estimate:
- How old are the skylights and attic fan(s)?
- Are the skylights deck-mounted or curb-mounted, and are flashing kits available for my roof type?
- Is there evidence of moisture in the decking around penetrations?
- Is my attic ventilation balanced (intake vs exhaust)?
- Would a ridge vent system reduce my need for powered attic ventilation?
- What upgrades improve energy performance in Hemet’s heat (glazing, shading, solar fan options)?
- How will skylights/fans affect the roof warranty and long-term leak risk?
Bottom Line: What Hemet Roofing Experts Recommend
If your skylights are aging or your attic fan is outdated, replacing them during a roof replacement is often the best long-term decision. It’s typically cheaper than doing it later, reduces leak risk, and helps your new roof perform like a complete system.At All Seasons Roofing, our Hemet Roofing experts recommend making these decisions based on the age and condition of the units, the design of your ventilation system, and how you want your home to perform in Hemet’s climate—not just on short-term savings.
If you’d like, share your roof type (shingle or tile), the approximate age of your skylights/fan, and whether you have soffit vents—then I can help you draft a short list of upgrade options to discuss with All Seasons Roofing.