How Long Does It Take to Install a Skylight in Cheltenham?
Realistic timings for fitting a roof window, a flat-roof rooflight or a roof lantern, from a single day to a few.
A straightforward skylight installation often takes a single day, particularly a like-for-like roof window or a flat-roof rooflight on an existing kerb. A roof lantern, a new opening that needs structural work, or several units together typically takes one to three days. The exact time depends on the product, the roof and the amount of opening-up and finishing involved.
Most people want to know how disruptive it will be and how long their roof is open. The honest answer is that we plan the work so the roof is never left exposed to weather, and most jobs are quicker than people expect. Here are realistic timings.
Typical installation times
Like-for-like roof window replacement
Swapping an old roof window for a new one in the same opening is usually a single day, often less for one unit. The opening already exists, so it is mostly removal, fitting, flashing and a tidy finish. Our skylight replacement service covers this work.
New roof window in a pitched roof
Forming a new opening means cutting and trimming the roof, fitting the window, weatherproofing and finishing the internal reveals. For a single window this is typically one to two days, depending on the plastering and finishing.
Flat-roof rooflight
On an existing builder-formed kerb, a fixed flat-roof rooflight is often a day. If a new insulated upstand is needed, allow a little longer for the kerb to be formed and detailed.
Roof lantern
A roof lantern on a prepared kerb is commonly one to two days for the fitting and weatherproofing. If the kerb has to be formed as well, or the lantern is large, it can extend to two to three days.
What affects how long it takes
Replacement or new opening
Reusing an existing opening is far quicker than forming a new one. New openings add structural cutting, trimming and internal finishing.
Structural work
If rafters need trimming or a beam is involved for a large aperture, that adds time for the structural element to be done properly.
Internal finishing
Plastering and finishing the reveals takes time, and plaster needs to dry before decorating. The fitting may be a day, with finishing following on.
Access
Easy single-storey access is quick. Working at height, or erecting and striking scaffolding, adds to the overall timescale.
Number of units
Several rooflights together take longer than one, though sharing setup and access makes them more efficient per unit.
How we keep it smooth
- We plan the sequence so the roof is made watertight each day, never left open to the weather
- We confirm the timescale in your fixed written quote, so you know what to expect
- We tidy as we go and protect the room beneath
- We flag finishing separately where plastering and drying time apply
The honest summary
Most single skylights are a one to two-day job, and a like-for-like replacement is often done in a day. Lanterns, new openings and multiple units take a little longer. The reliable timescale for your project comes from the survey, where we see the roof and the scope and set realistic dates.
For a clear timescale and a fixed price, get a quote and we will survey your roof and set out exactly what the work involves.
From quote to daylight, with no surprises
Fixed quote
A clear, fixed written price — online or by phone.
Survey
A specialist confirms the right glazing spec. Flexible times.
Install
Clean, weather-tight fitting that protects your property.
Guarantee
We tidy up and back the work with a written guarantee.
Frequently asked questions
How long does it take to install a skylight?
A straightforward roof window or flat-roof rooflight often takes a single day, especially a like-for-like replacement. A roof lantern, a new opening or several units together typically takes one to three days.
How long to replace an old roof window?
A like-for-like replacement in the existing opening is usually a single day, sometimes less for one unit. It is mainly removal, fitting, flashing and a tidy finish, with no new opening to form.
Does fitting a roof lantern take longer?
Usually, yes. A roof lantern on a prepared kerb is commonly one to two days, extending to two or three if the kerb must be formed or the lantern is large. The survey confirms the timescale.
Will my roof be left open overnight?
No. We plan the work so the roof is made watertight at the end of each day and never left exposed to the weather. Your fixed written quote sets out the timescale and sequence.
Helpful reading on this
Costs, comparisons and answers to the questions we’re asked most.
Other skylight services
Ready to bring the daylight in?
Tell us about your project and we’ll send a clear, fixed written quote — no pressure, no surprises.
- Fixed written price before any work starts
- No pressure, no obligation, no sales calls
- Flexible survey times that suit you
- A reply within one working day