Should Rooflights Be Replaced During a Roof Refurbishment?
Yes, rooflights should almost always be replaced during a roof refurbishment. The access, scaffold and safety set-up are already paid for, so replacing the rooflights at the same time costs far less than a separate visit later. Leaving aged rooflights in a refurbished roof also puts the oldest, weakest components back into a roof meant to last for decades, and they become the next leak and the next fall risk, often under a fresh warranty they undermine.
This answer sits under our commercial skylight installation service. Timing rooflight replacement with a wider roof refurbishment is one of the clearest cost decisions in the whole subject, and it is regularly missed.
The access is already paid for
The biggest cost in any roof work is safe access: scaffold or a mobile platform, netting, cordons, edge protection and the roof access route. A refurbishment mobilises all of it. Replacing the rooflights while that access is in place adds the cost of the rooflights and their installation, but almost none of the access cost, because it is already there. Doing the rooflights as a separate job later means paying the whole access set-up again for the rooflights alone. This is the same shared-access logic that makes whole-slope replacement beat patching, applied across trades. Our replace rather than patch answer covers the principle.
Old sheets become the next leak
A refurbishment is done to buy the roof another twenty or thirty years. If the rooflights left in it are already twenty-five years old, they are past their service life and will fail within a few years, inside the life of the new roof. The refurbishment then has to be reopened to replace them, disturbing the new covering and the new warranty. Leaving old rooflights in a new roof builds the next leak in on day one, and it is the rooflights, not the new sheeting, that will fail first.
The weakest component sets the roof’s real life. A roof is only as watertight and as safe as its worst component. Refurbish the metalwork and leave the rooflights, and the roof’s effective life is set by the old rooflights, not the new sheeting. The refurbishment spend is undercut by the components that were left. Replacing the rooflights in the same programme is what makes the whole roof reach the life the refurbishment was meant to buy.
Warranty continuity
A refurbishment usually carries a workmanship guarantee on the new work. Old rooflights left in the roof are outside it, and when they leak the question of whose responsibility the water is, the new covering or the old rooflight, gets messy at exactly the wrong moment. Replacing the rooflights in the same programme puts them under the same guarantee, so the whole roof is covered as one and there is no seam in the warranty for a leak to hide in. Every installation we do carries a 10-year workmanship guarantee, and doing the rooflights with the refurbishment keeps that continuous across the roof.
Fragility, matched across the roof
A refurbishment is also the moment to bring the whole roof to a documented non-fragile position. Leaving old fragile rooflights in a refurbished roof means the roof is still a fragile roof to manage, with the same access restrictions and the same duty-holder risk, despite the money spent. Replacing them lets the whole roof be recorded as documented non-fragile, which is the defensible position a duty holder wants. Non-fragility is a tested assembly classification that degrades with age, so matching it across the refurbished roof matters. Our non-fragile rooflight specification page covers the records.
When it might wait
The honest exception: if the rooflights are genuinely recent and sound, with a documented non-fragility record and years of service life left, there is no case for replacing them just because the roof is being refurbished. That is replacing good components. But on the older stock across Ipswich and Suffolk, where the rooflights and the roof are usually the same age, the rooflights are almost always due, and the refurbishment is the cheapest moment to do them.
What it means around Ipswich
Across the Ipswich and Suffolk and north Essex estates, roofs and their rooflights typically went in together in the 1980s and 1990s, so a refurbishment of one is almost always a refurbishment due on the other. On the coastal belt near Felixstowe, where corrosion drives refurbishment, the rooflight fixings are corroding on the same timetable as the sheeting fixings, so the fixing renewal and the rooflight replacement belong in the same programme. Our coastal industrial roof corrosion answer covers that.
Is it cheaper to replace rooflights with a roof refurbishment?
Considerably, because the access, scaffold and safety set-up are already in place and paid for. Replacing the rooflights at the same time adds their supply and fit but almost none of the access cost. Doing them as a separate job later means paying the whole access set-up again, which is the largest part of any roof job.
What happens if I leave the old rooflights in a refurbished roof?
They become the next leak and the next fall risk, usually within a few years, inside the life of the new roof. The refurbishment then has to be reopened, disturbing the new covering and the new warranty. The roof’s real life is set by its weakest component, so old rooflights left in a new roof undercut the whole refurbishment.
Do the rooflights while the access is up
If your roof is being refurbished, the rooflights are almost certainly the same age and due, and the access is already paid for. We survey the rooflights alongside the refurbishment and price them into the same programme.
Request a survey. Read across to when to replace industrial rooflights, why replace rather than patch, and the phased programme guide.
Thinking about this job? We survey across Ipswich, Suffolk and north Essex and give you a fixed price before any work starts, with a 10-year workmanship guarantee.