What does a Victorian conservatory roof need when it is replaced?

The Victorian style is a conservatory with a bay front, usually of three or five sides, and a roof that rises from every facet to a ridge along the middle. Where two facets meet, the roof forms a hip, the external angle where two facets meet, running from the gutter line to the top. The ridge itself is the horizontal line along the top, and it often carries a decorative crest and a finial at the end.

That geometry creates far more joints than a lean-to has, and a hip cut a degree or two out of true will let rain through long before the rest of the roof shows any wear. A five-facet roof has five hips, a ridge, and an eave line that turns corners, and every one of those has to shed water at an angle. The roof bars are cut at compound angles, and a small mistake at one hip travels down the whole length of the slope. This is why the shape is quoted differently from a rectangular room, and why a careless fit shows up as leaks at the hips within a couple of winters.

Polycarbonate suits a faceted roof reasonably well because the sheets are light and can be cut to the wedge shape of each facet. Glass gives a brighter room and a more refined finish, though each pane is cut to a wedge and made to order, which adds lead time. A lightweight tiled system will not give you that bright, open feel overhead, but it makes the room usable in a way that suits a dining table or a study. A lightweight tiled system gives a conservatory roof that looks and sounds like part of the house, and HomeBuilding reports lifespans beyond 50 years for tiled conservatory roofs, far longer than plastic sheet.

MyBuilder's guide, updated on 21 August 2026, gives typical national costs of £2,000 to £5,000 for polycarbonate, £3,000 to £8,000 for glass and £5,000 to £10,000 for a solid roof, and structural reinforcement at £500 to £2,000. What a faceted roof adds is extra cutting and jointing at every hip, and our written quote reflects that once the survey is done. Our page on conservatory roof skylights shows how to add daylight to a solid version.

On a tiled or solid roof the hips and ridge are finished with ridge and hip pieces. Under BS 5534:2014, ridge and hip tiles are no longer trusted to mortar on its own, so they carry a mechanical fixing too. Many lightweight systems go further and use dry-fix: fittings held by clips and screws with no bedding at all, to the specification in BS 8612:2018. On a Victorian roof that means each hip has its own run of fixings, and the finials and crests have to be secured separately.

At the back, the top of the roof is sealed with a flashing, a lead strip tucked into the house wall and folded down over the roof edge. On a Victorian roof that strip must follow the shape of the bay as well as the wall, and the corners need careful dressing. Leadworx gives Code 4 as the usual weight for general flashing work, and properly fitted lead can serve for decades, which is longer than the conservatory covering beneath it. A thick bead of sealant at a hip usually means someone has patched it before, and we treat that as a warning that the joint has been leaking for some time.

A faceted frame carries load differently from a rectangle, because the ridge and hips collect it and pass it down to a few points on the frame. Changing from polycarbonate to a tiled or solid roof adds weight, and a solid roof needs a building control application before the work starts. We check the frame before quoting and tell you if it needs strengthening.

Inside, a solid roof offers the chance of a new ceiling, which transforms a Victorian room. The shape of the ceiling follows the facets, and plasterers and joiners can create a faceted vault or a flat ceiling with a lantern. Our page on the conservatory internal ceiling goes through what is possible and what it adds to the job. Fitting a roof lantern or a skylight into a Victorian roof is also an option, and the survey establishes which facet can take it. A skylight on the facet facing away from the afternoon sun keeps the room brighter without adding much heat, which is worth thinking about before you choose the position.

Victorian conservatories are often attached to Victorian houses, and some of those stand in conservation areas, such as parts of Swindon Old Town, or are listed. A listed house needs listed building consent for work that alters its special interest, and a conservation area may have restricted permitted development rights, so check with Swindon Borough Council's planning team before you choose a covering. If you are comparing it with the simpler shape, the lean-to conservatory roof page explains what changes.

When you contact us, tell us how many facets the front has and whether it has crests and a finial. A survey visit produces site photos and a quote in writing, and our workmanship guarantee lasts 10 years and is issued on paper. See the conservatory roof replacement overview for the full range, then ring 01793 626096, use WhatsApp or the enquiry form.