Roof Lantern Installation
Flat-roof glazing sized to the room and detailed into the kerb below it.
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Mid Essex
Rooflight installation in Margaretting
Small village, agricultural conversions. What that means for getting glass into a roof here is the whole of this page.
We travel to Margaretting
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MargarettingTown covered
Mid EssexWithin
30Mile radius by road
10Year workmanship guarantee
In Margaretting
What we install on Margaretting roofs
Flat Roof Rooflight Installation
Flush and kerb-mounted units into single-ply, felt and GRP flat roofs.
View this service →Roof Window Installation
Roof windows trimmed into slate, clay and concrete tile without proud flashing.
View this service →VELUX Window Installation
We install VELUX alongside Fakro, Keylite and Roto roof windows.
View this service →Electric and Opening Rooflights
Actuated opening units, rain sensors and controls, wired and commissioned.
View this service →Energy Efficient Rooflights
Specified on U-value and g-value, not on the brochure photograph.
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The local detail
16 things worth knowing about Margaretting roofs
Margaretting is a scattered parish rather than a compact village. There is a cluster along Main Road, a second at Margaretting Tye around the green, a church standing apart from both with its timber bell tower, and a scatter of farmsteads on the fields between. The building stock follows that pattern, and it contains a high proportion of former agricultural buildings that now have kitchens in them.
That is the reason rooflight work here reads differently from work in a town. A converted barn or cart lodge is among the most demanding roofs to set glass into and among the most rewarding. The slopes are large and uninterrupted, the timber beneath them is old and frequently protected, and the plainness of those elevations is usually the reason the conversion was permitted at all. This page works through what Sunspire looks at on a Margaretting roof, starting with what is holding it up.
- 01 The roofs Margaretting actually has
- 02 Barn and cart lodge conversions off the Ingatestone road
- 03 Historic roof timbers, and why they are not trimmed like rafters
- 04 Peg tiles, pantiles and what each needs at the opening
- 05 Working within the Margaretting conservation area
- 06 Conservation rooflights, and the detail that gets them approved
- 07 Listed farm buildings and the consent that runs alongside planning
- 08 Long unbroken roof slopes and where the light should land
- 09 Ventilating a converted agricultural roof
- 10 Insulation depth, and the reveal it creates
- 11 The Wid valley, damp ground and what it means for a flat roof
- 12 Access on a village plot with a single track approach
- 13 Cottage roofs on Main Road and the pitch they run at
- 14 What a survey in Margaretting looks at first
- 15 Sequencing a rooflight into a barn conversion programme
- 16 Getting a figure for a Margaretting roof
The roofs Margaretting actually has
Four coverings turn up repeatedly across the parish, and they behave differently at an opening. Handmade clay peg tiles on the older houses and on the church-end cottages, laid at roughly forty to forty five degrees. Black glazed pantiles on nineteenth century barns and outbuildings, with a deep double roll. Natural slate on a handful of Victorian estate cottages. Plain concrete interlocking tiles on the twentieth century infill along Main Road.
Working agricultural buildings add a fifth, profiled fibre cement or steel sheet, which takes a purpose-made in-plane rooflight rather than anything domestic. The covering is the first thing established on a survey, because it decides the weathering method before any product conversation begins.
Barn and cart lodge conversions off the Ingatestone road
A barn conversion is consented on the basis that the building still reads as what it was. New window openings in the walls are usually limited and sometimes refused outright, which means the daylight has to arrive through the roof. That single planning fact is why so much of the glass in Margaretting sits in a roof slope rather than an elevation.
The usual outcome is a run of flush units set in the slope facing away from the lane or the yard, sized and spaced to the structural bays. Handled that way the building keeps its long plain roof from the approach and the inside gains a working level of daylight.
Historic roof timbers, and why they are not trimmed like rafters
A traditional barn roof is a hierarchy. Principal rafters or trusses at wide intervals carry purlins, and the purlins carry light common rafters. In a modern house all the rafters are equal and any of them can be doubled and trimmed. In a barn they are not.
A principal rafter, a tie beam or a queen post is a primary member and cutting one changes how the whole frame stands up. In practice an opening is planned to sit inside a single bay, between principals, with the trimming taken off common rafters only. That constraint sets the width available before anybody looks at a size chart, and it is the reason several modest units usually beat one large one on a barn.
On a historic frame the opening size is decided by the bay, not by the catalogue.
Peg tiles, pantiles and what each needs at the opening
Handmade peg tiles vary in camber, thickness and length across a single roof, because they were made by hand and then weathered for a century. A standard pressed flashing kit assumes a uniform tile and sits proud on a roof like that. The answer is usually dressed lead: a soaker to each course, an apron at the head, and skirts worked into the tile line by hand.
Pantiles are the other awkward one. The roll is deep, so a shallow apron bridges the trough and leaves a gap that wind pushes water through. Either a kit made for a deep profile or lead dressed into the roll will do it. Tiles lifted to form the opening are set aside and re-laid, because the reclaimed ones match and new ones never do.
Working within the Margaretting conservation area
Parts of the parish sit within a designated conservation area, and further protection applies around the older buildings. Two things follow. Permitted development rights are frequently restricted by an Article 4 direction, so the assumption that a rooflight needs no application does not hold automatically here. And where an application is required, the roof slope that faces a public view is treated quite differently from the one that does not.
None of that closes the door. It changes the order of work: the position and the product get agreed with the planning officer before anything is ordered, not after. Sunspire covers the same ground across the rest of the district, and the wider picture is set out on the areas we cover page.
Conservation rooflights, and the detail that gets them approved
The unit that satisfies a conservation officer has a recognisable shape. A slim frame in a dark finish, usually black, a single vertical glazing bar down the centre so the opening reads as two panes rather than one sheet, and a profile that sits within the plane of the tiles rather than standing off it.
The visual test is the depth. A modern white surround projecting fifty millimetres above the tile line is visible from the field and reads as new. A conservation rooflight set flush, with the tiles dressed tight to a slim upstand, disappears at any distance. The glazing behind the bar can be modern and thermally efficient; it is the frame that has to behave.
Listed farm buildings and the consent that runs alongside planning
Several buildings in the parish are listed, and a listed farm building brings a second consent regime that runs in parallel with planning rather than inside it. Listed building consent covers alterations affecting the character of the building, and a new opening in a historic roof plainly qualifies.
The practical implication is programme. Two consents take longer than one, and the case usually turns on how reversible the alteration is and how little of the original fabric is disturbed. An opening framed off common rafters, with the principals untouched, is a much easier case to argue than one that cuts a truss.
Long unbroken roof slopes and where the light should land
A barn is deep in plan and high at the ridge, which is a gift for daylight if the glass goes in the right place. A rooflight high on the slope throws light a long way across the floor, because the sky it sees is at a shallow angle to the far side of the room. The same unit low down near the eaves lights the wall beneath it and little else.
Spacing is the other half. Setting units on the bay rhythm, one per bay or one in every second bay, produces an even wash rather than bright rectangles with dark gaps between them. It also happens to be the arrangement that looks deliberate from outside.
Ventilating a converted agricultural roof
Most barn conversions end up with a warm roof or a hybrid, with insulation between and over the rafters and the historic timber left exposed to the room. Where a cold roof has been formed instead, there is a ventilation path running from eaves to ridge above the insulation, and a rooflight sits directly in it.
An opening interrupts that path unless air can travel around it. The detail is a counter batten arrangement carrying air past both sides of the trimmed opening and back into the main void above. Getting it wrong produces a cold spot, then interstitial condensation, then a wet mark on the plasterboard some distance from the actual cause.
Insulation depth, and the reveal it creates
A converted barn roof is thick. Between rafter insulation plus an over-rafter layer can put three hundred millimetres or more between the outside of the tile and the inside of the ceiling, which means the rooflight sits at the end of a deep tunnel.
Left square, that tunnel behaves like a chimney and delivers a hard-edged block of light. Splayed, with the lining opening outwards towards the room, it spreads across the ceiling and reads as roughly twice the size. On a build-up this deep the splay is not a refinement, it is the difference between a good rooflight and a disappointing one, and it costs plaster rather than glass.
The Wid valley, damp ground and what it means for a flat roof
The Wid runs through the parish and the ground either side of it is low and slow to drain. Modern flat roofed additions on those plots are worth surveying carefully, because a roof that has settled slightly on soft ground loses its fall before anything else goes wrong.
Water that is still standing more than forty eight hours after rain is ponding, and ponding around a kerb finds any weakness in the detail below it. Where a survey turns that up, the fall gets sorted first and the glass is set into a roof that drains. A flat roof rooflight installed over standing water is a decision that comes back.
Access on a village plot with a single track approach
Access changes the price more often in Margaretting than the glass does. Farm tracks, unmade lanes, verges that will not take a delivery lorry after rain, and yards shared with a working business all show up in the parish.
What the survey establishes is simple and practical. Whether a scaffold can be erected on the ground available, whether there is a hard standing to bring material onto, whether the approach is wide enough for the delivery, and where the stripped covering goes while the roof is open. None of that is glamorous and all of it is in the fixed figure rather than discovered on the day.
Cottage roofs on Main Road and the pitch they run at
The older cottages along Main Road run at a steep pitch, commonly forty degrees and upward, which is genuinely good news. Steep slopes shed water fast, so the weathering demand on a flashing is lower than on a shallow roof, and the manufacturer’s minimum pitch is never in question.
A steep pitch also changes the internal geometry. The head of the opening is a long way above the sill, so a roof window in a forty five degree slope gives a tall clear view of sky and needs less splay at the top than at the bottom. The usual internal detail is vertical above the window and horizontal below it, which puts the sill at working height and lets the light run into the room.
What a survey in Margaretting looks at first
Timber, before anything. What the frame is, where the principals fall, which members are original and which are twentieth century additions. On a historic building that determines whether the opening the customer has drawn is achievable in the position they have drawn it.
Then the covering, and specifically whether it can be lifted and re-laid. Brittle old peg tiles break when handled, so the survey estimates a wastage allowance and identifies where matching reclaimed tiles will come from. Then pitch, orientation, the ceiling line inside, and access. Those answers turn an emailed range into a fixed written figure.
Sequencing a rooflight into a barn conversion programme
On a live conversion the rooflight is neither the first trade nor the last, and the two moments that matter are early. The first is design, when positions are fixed against the structural bays and against whatever the consent allows. Moving a rooflight after the frame is closed up and the insulation is on is expensive in a way that moving it on a drawing is not.
The second is first fix. A cable run to an electric opener costs almost nothing while the roof is open and a great deal once the lining is on. High level units in a barn are well beyond pole reach, so that decision is worth making early even if the actuator itself is fitted later.
Getting a figure for a Margaretting roof
Sunspire works to two figures. A range by email once the basics are known, then a fixed written price after a survey, with the Building Control notification handled as part of the job. For a barn or a listed building the range is deliberately wide until the timber has been seen, because the frame is the variable that moves it.
The fastest start is a photograph of the roof from outside, one of the ceiling or the underside of the frame from inside, and a rough room size. Sunspire travels to Margaretting from Chelmsford, and the general cost drivers apply here as they do anywhere, with access and historic fabric weighing heavier than usual.
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We start with the building, the covering and the slope. Then we tell you what will suit it, and what it will cost, as a fixed written number.
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