Skylight Installation in Sible Hedingham
- Fixed quote before we start
- Roof never left open overnight
- 10-year workmanship guarantee
- Fixed quote before we start
- 10 years workmanship guarantee
- 25 years fitting rooflights
- Skylights only, not a general roofer
Sible Hedingham is a big village by Essex standards, strung along the Colne valley with an old core of timber-framed and rendered properties and a wide spread of twentieth-century housing around it. That mix is why the work here splits so cleanly. On the older buildings it is usually a first rooflight going into a roof that never had one. On the post-war and later stock it is almost always a replacement, because those houses had roof windows fitted in the 1990s and 2000s and a lot of those units are now finished.
It is 24.5 miles from Ipswich as the crow flies. Realistically 55 to 60 minutes by road, because there is no fast route across and the last stretch is A and B roads.
How a thirty year old rooflight actually fails
Rooflights do not fail all at once. They fail in a sequence, and by the time somebody rings us about a stain on the ceiling, several of these have usually been happening quietly for years.
- Timber frames rotting where the sash meets the frame. The classic on older roof windows. Water sits in the rebate, the coating breaks down, and the timber goes soft at the bottom corners of the sash first. Once that corner joint has moved, the sash is no longer square and no amount of work on the seal will fix it.
- Seals perishing and the unit misting. The perimeter seal on a sealed unit has a working life. When it goes, moist air gets into the cavity, the desiccant in the spacer bar absorbs it until it is saturated, and after that the glass mists on every cold morning. That is permanent. There is no drying it out.
- Sagging hinges. Thirty years of opening and closing, plus the weight of a glass sash, and the hinge wears. The sash then closes onto the seal unevenly, hard at the top and slack at the bottom, so the weathering line is broken along one edge.
- Flashings corroding or lifting at the laps. Lead work fatigues and cracks, aluminium corrodes at the fixings, and the laps lift enough for wind-driven rain to get behind them.
- Polycarbonate domes going brittle. Common on flat roof extensions and garages from this era. UV breaks the material down, so it yellows, crazes into a network of fine cracks, and eventually cracks under a hailstone or a foot.
The honest economics of patching
Here is the straight version. Reseal a misted unit, dress the flashing back down, run a bead of sealant round the frame, and you will get through a season. Maybe two. The frame is still rotten, the hinge is still worn, the flashing is still fatigued, and sealant is now the only thing keeping water out, which is a job sealant was never designed to do alone.
Meanwhile you have paid for access and paid for labour, and got nothing that lasts. Do it twice and you have spent a meaningful proportion of a new unit with the old one still in the roof.
So patching and resealing are not services we offer. That is a deliberate decision, not a gap. When a rooflight has failed, we take it out and put a new one in, and the new one carries a 10-year workmanship guarantee.
The exception worth stating: if a unit is genuinely young and the only issue is a flashing that was never fitted correctly, we will say so at survey and tell you it does not need replacing yet. We would rather lose that job than sell you a unit you do not need.
What a replacement involves on the day
The detail people are not told often enough is that a new rooflight is rarely the same size as the old one. Sizing conventions have changed, ranges have been rationalised, and a unit from 1996 frequently has no modern equivalent in exactly that dimension. So the opening has to be adjusted.
That means the timber liner comes out and is reformed to the new unit, and where the difference is larger than the liner can absorb, the trimmers themselves are moved. Trimmers are structural. Moving one is a proper job with proper fixings, not a case of packing it out. On close-centred rafters you sometimes gain width easily and sometimes cannot gain any at all, which is why the size conversation happens on the roof at survey.
Then the flashing kit, which is matched to the covering it sits in. The Colne valley stock throws up a proper mix: plain clay tiles on the older buildings, concrete interlocking on the post-war housing, slate here and there. A kit for a flat covering will not seat on a deep-profile interlocking tile, and the gap it leaves is where the next leak starts.
Which replacement unit goes in
On a pitched slope it is normally a modern roof window from one of the mainstream ranges, straightforward pitched roof skylight installation work. We are experienced VELUX, Keylite and Roto installers, so a like-for-like swap on VELUX window installation is well-trodden ground. Where the failure is a yellowed dome on a flat roof extension, the sensible replacement is a modern flat glass unit on a properly formed upstand, covered under flat roof skylight installation. The thermal gain alone is significant, because a 1990s unit might sit around 2.8 W/m²K against roughly 1.2 for a current one. Numbers are on energy efficient skylight installation.
What thirty years of standards quietly changed
A replacement is not just a like-for-like swap, because the unit going in is built to a standard the old one never met, and the gap is bigger than people expect. A roof window from the mid-1990s might sit around 2.8 W/m²K for the whole unit. A current equivalent is roughly 1.2, better than half the heat loss through the same hole in the roof. In a loft bedroom that is the difference between a cold pane streaming with condensation on a winter morning and one that stays clear, and it shows up on the heating bill as well as on the glass.
The other change is what comes with the unit. A modern roof window is supplied with an insulation collar and an underfelt or drainage collar designed to tie the frame into the roof’s insulation and its underlay, closing the cold bridge and the air path around the frame that older units left open. A 1990s window often had none of that, which is part of why the reveals around old rooflights are so often cold, draughty and prone to black mould in the corners. Fitting the modern collars properly, packing the reveal with insulation and sealing it, is as much of the thermal upgrade as the glass itself, and it is work that only happens if the fitter knows to do it. We treat it as part of the replacement, not an extra.
Reading the whole roof, not just the failed unit
People usually call about one rooflight, the one with the stain under it, but on a house where the units all went in at the same time in the 1990s or 2000s, the others are the same age and heading the same way. Part of the survey is looking at the whole roof rather than the single failure. If a second unit is misting at the edges or its frame is soft in the corners, it is often better economics to do both while the access is set up and the scaffold is there, rather than pay twice for getting onto the roof. That is a judgement for you to make with honest information, not a push to sell more, and if the other units genuinely have years left we will tell you to leave them.
The same survey settles the covering, because Sible Hedingham’s mixed stock throws up plain clay tile, concrete interlocking and slate within a short walk, and the replacement flashing kit is matched to whichever your roof actually is. It also settles the size question set out above, since a 1990s opening rarely matches a current unit exactly and the liner, and occasionally a trimmer, has to be reformed to suit. All of it goes into one fixed price before anything is ordered.
The yellowed dome is its own replacement story
A good share of Sible Hedingham’s 1990s rooflight work was polycarbonate domes on flat-roofed extensions, garages and utility rooms, and those have their own way of ending. Ultraviolet light breaks the polycarbonate down over the years, so it yellows, goes brittle and crazes into a web of fine cracks, until eventually a hailstone or a stray foot puts a hole through it. Swapping a dome is rarely a straight like-for-like either, because the old timber kerb underneath it is usually as tired as the dome, and sometimes never had the upstand height to weather properly in the first place. The sensible replacement is a modern flat glass unit on a properly formed upstand, which looks better from below, sheds water on a built-in fall and performs on a different level thermally. That moves it onto the ground covered under flat roof skylight installation.
Getting a price in Sible Hedingham
Survey first, then one fixed written price. Twenty-five years in the trade behind every job, everything installed to current Building Regulations. If you have a misted unit and are unsure whether it needs doing this year, send a photograph and we will give you an honest read before we come out.
We work the same patch across the Colne valley and north Essex, including Halstead, Earls Colne and Clare. The full list is on areas we cover.
Request a fixed quote for a rooflight replacement in Sible Hedingham.
My roof window is misted between the panes. Can the glass just be swapped?
On some units the sealed unit alone can be changed, but it is usually the wrong call on a window of that age. Misting means the perimeter seal has failed and the desiccant is saturated, and a unit whose seals have gone is a unit that has been weathering for decades. The frame, hinges and flashing are the same age and in the same condition. Putting new glass into a tired frame gets you a clear view of the same problem. We replace the whole unit.
Will a new rooflight fit the existing hole in my roof?
Often not exactly. Sizes from the 1990s and 2000s do not always have a current equivalent, so the timber liner is reformed to suit the new unit and occasionally a trimmer is moved. On close-centred rafters you may not be able to gain width at all, which limits the range of sizes available to you. We measure the opening and the rafter centres at survey so the size is settled before anything is ordered.
Do you do repairs if I only want the flashing sorted?
No. Repair and resealing are not services we offer. If a flashing has failed on a unit that is otherwise sound and young, we will tell you that at survey and you are free to have someone else look at it. Where the unit itself has reached the end of its life, and on 1990s stock it usually has, replacement is what we quote for and it is the option that lasts.
Is a new rooflight really that much warmer than my 1990s one?
Noticeably, yes. A whole-unit figure of around 2.8 W/m²K was normal in the mid-1990s; a current unit is roughly 1.2, less than half the heat loss through the same opening. On top of the glass, modern windows come with insulation and underlay collars that tie the frame into the roof and close the cold, draughty bridge that older units left around the reveal. Fitted properly, that ends the condensation and corner mould people often live with around an old rooflight. The gain is real enough to feel on a winter morning.
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.