How long does a conservatory roof replacement take?

It helps to see the job as five separate stretches of time rather than one number. Only the third is spent on your roof.

1. Survey and quote. We visit, photograph the roof and frame, and put a price in writing for you to read.
2. Ordering. Sheets, glass units, bars, tiles or a lantern are often made to the measurements of your frame, so the lead-in depends on what you choose.
3. Strip and fit. The existing roof is taken off, the frame is checked, and the new roof is built and made weathertight.
4. Finishing. Flashings, internal trims, guttering and cleaning.
5. Sign-off. If the roof is notifiable, building control inspects at the agreed stages.

Weather matters at the strip stage, because a conservatory is open to the sky once the old sheets are off. We plan the strip so that the new roof, or at least a weathertight cover, is on before we leave each evening.

A light polycarbonate roof is the quickest to fit. The sheets are cut to length, set on the existing bars or new ones, sealed and capped, and little weight needs to be lifted into place. Glass units are heavier and have to be handled with care, so more people and more time go into the lift.

A solid roof is a bigger build. It involves a new structure, insulation, a boarded or battened deck, a covering and internal plastering or lining, and it is the type that most often needs a Building Regulations application first. If you are choosing between them, our step-by-step guide to replacing a conservatory roof describes what happens in each stage.

We would rather give you a range tied to your own conservatory, from the survey, than quote a generic number of days that might not suit a large Victorian-style frame or a small lean-to.

Shape is a factor as well. A simple rectangle with a single run of rafters goes up faster than a faceted bay with hips, valleys and a ridge crest to finish, because every extra angle brings more cutting, more flashing and more places to seal. A lantern or roof windows set into a solid roof add their own upstands and trimming, and these stretch the programme a little further.

Most delays come from something found, or something not yet decided, rather than from the work itself.

The frame

If the frame is sound, the job runs as planned. If we find rot in a timber frame, failed seals in uPVC, or a base rail that is not square, it needs repair before a roof goes on. MyBuilder's 2026 guide puts structural reinforcement at £500 to £2,000, and it takes extra days. A heavier solid roof can ask more of the frame than the old covering did.

Planning and building control

If a solid roof needs a planning decision, or building control needs plans and a plan check before work starts, that stage sits before any work on site. Our answer on whether a solid roof turns the conservatory into an extension explains why those applications arise.

Access and materials

A steep lane, a tight garden or a conservatory with no side access means extra time with scaffold and lifts. Made-to-order items, such as a lantern or tinted glass units, set their own delivery dates, and it is worth asking what the supplier's lead time is before you agree a start.

Where a solid roof is notifiable, building control inspects the work at stages rather than only at the end. Where notice reaches Stroud District's building control before 15:00 on a weekday, the aim is a visit by the next working day if possible. That is an aim and not a promise, so we put inspection points into the programme with some slack either side. A registered building control approver works to its own diary, which is worth asking about if you go that way.

The notification itself is something we explain and handle for you where the work requires it. It does not take long, but the inspector's availability decides when a covered-up stage such as insulation can be closed in. Never close up a stage that is meant to be seen. The schedule slips, and a missed inspection can mean opening up finished work.

A little preparation saves time on site, and the effort is small. Take down curtains and blinds that hang from the frame, lift rugs and anything stored in the room, and think about where plants and pets will be while the roof is open. Clear the room of furniture and plants before the strip, move cars from the access route, and tell neighbours when scaffold is going up. Agree early which items you want, because a changed decision after ordering puts the delivery back.

If only one sheet has failed, you may not need a whole-roof job at all, and our answer on replacing a single polycarbonate sheet covers when that is realistic. For a full roof, the conservatory roof replacement page explains how a survey leads to the written quote. When we finish, the garden is left clear of debris, and a 10-year workmanship guarantee in writing covers the roof.