Conservatory Glass Replacement in Liverpool

What does conservatory glass replacement cover?

A typical conservatory is a run of glazed frames sitting on a low dwarf wall, or full-height glazing from floor to eaves, with a set of French doors or a sliding patio door leading to the garden. Each pane in those frames is a separate double glazed sealed unit: two sheets of glass held apart by a spacer bar packed with desiccant, sealed around the edge and often filled with argon. When one of those units fails or breaks, it can be swapped without disturbing the frames around it.

This is the same core job as our misted double glazing repair for windows in the house, but conservatories bring a few extra points to think about: more of the glass sits low down near the floor, many of the panels are large, and the room is far more exposed to sun and temperature swings than a window in a brick wall. It sits within our wider double glazing repair in Liverpool work, so if a house window or door needs attention at the same visit, we can look at that too.

Common reasons to replace conservatory glass

• Misting between the panesA milky film or droplets inside the unit that cannot be wiped off from either side means the edge seal has failed and the desiccant is saturated.
• Cracked or broken panesA ball from the garden, a slammed door or a stone thrown up by a strimmer can crack the outer or inner pane. See our broken window glass replacement page for more on breakages.
• Old glass that is not safety glassSome older conservatories have low-level panels in ordinary annealed glass. When a unit is replaced, it should meet today’s safety glazing rules.
• Too much glare or no privacyA side facing a neighbour or the road can be changed to an obscure or patterned unit when the glass is replaced anyway.
• Cold or overheating roomsOlder units without a low-E coating let more heat out in winter. Swapping them for modern units can help; our energy-efficient glass upgrade page explains the options.

Why do conservatory units mist up?

The edge seal on any sealed unit is under constant stress, and a conservatory pushes that harder. Glass in a south or west-facing conservatory can heat up quickly on a sunny afternoon and cool sharply overnight, so the unit expands and contracts more often than a window shaded by a wall. Other common causes are blocked drainage in the bottom of the frame, which leaves the unit sitting in water, glazing packers that have slipped so the unit takes weight on one corner, and simple age. There is no fixed lifespan: some units last for decades, others fail early.

Before booking anything, it is worth checking where the condensation is. Droplets on the room side on a cold morning, especially with plants or drying washing in the conservatory, are a ventilation issue rather than a failed unit. Condensation on the outside face of efficient low-E glass early in the day is also normal. Only moisture trapped between the panes means the unit itself has failed.

Safety glass in conservatories

Under Approved Document K, glazing in critical locations must be safety glass. In a conservatory that usually includes:

• any glazed panel within 800 mm of floor level, which covers most full-height side frames;
• glass in doors, up to 1500 mm from the floor;
• side panels within 300 mm of the edge of a door.

Replacement units in those positions are made with toughened glass to BS EN 12150, which breaks into small blunt pieces, or laminated glass to BS EN 14449, which holds together on its interlayer. Toughened glass usually carries a permanent mark in one corner, so if you are not sure what you have, a photo of the corner of the pane helps. Replacing the glazing alone, not the frame, is not controlled work under the Building Regulations, but we still match the glass to the position it sits in.

How we replace a conservatory glass unit

1. Call back and questions. We ask which panes are affected, whether they are low-level, full-height or in the doors, the frame material and roughly how old the conservatory is. A photo, including any marks on the spacer bar or the corner of the glass, is useful.
2. Visit and measure. We look at the frames, check drainage and packers, measure each unit and confirm the glass type needed for that position.
3. Written quote. We explain what we recommend and why, and give a written quote.
4. Units made to order. Sealed units are made to measure, so there is usually a wait of days to a couple of weeks.
5. Fitting. At the second visit we remove the glazing beads, take out the old unit, re-pack the new one correctly and refit the beads. A standard unit is often fitted in under an hour.
6. Checks before we leave. Doors are opened, closed and locked to make sure everything works as it should.

Conservatory doors and their glass

French doors and sliding doors in conservatories take far more knocks than the fixed panels. If the glass in a door has misted, it is worth checking the door itself at the same time: a door that has dropped can put strain on the unit. Heavy or sticking sliding doors are often worn rollers, which our patio and sliding door repair service deals with. All glass in conservatory doors needs to be safety glass.

Conservatory glass across Merseyside

Many suburban homes around Liverpool added a uPVC conservatory in the 1990s and 2000s, so a lot of those first-generation units are now at the age where seals give up. In places like Maghull and Woolton the conservatory is often a main family room, so a cloudy side panel is noticed every day. Closer to the coast in Formby, wind-driven rain tests drainage and seals, and blocked drainage slots are worth ruling out before a replacement unit goes in.

What affects the cost?

We quote after seeing the conservatory, but the main factors are the size of each unit, how many are being replaced, the glass type (toughened, laminated, obscure, low-E or solar control), shaped units such as those at the top of a Victorian-style bay, Georgian bars inside the unit, and how easy the frames are to reach. Our double glazing repair cost guide covers national guide figures for replacing blown units.

If your conservatory was installed fairly recently, check the installer’s paperwork before arranging any repair, as some installer guarantees have conditions about who works on the glazing.