Skylight Installation in Sproughton
- 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
Sproughton sits about 2.1 miles west of Ipswich centre, close enough that most of the village is a ten-minute drive from town and near enough to the A14 junction that we pass it constantly. For years it was a small Gipping-side village with a church, a mill site and a few lanes of older cottages. Then the former sugar beet processing land came forward as a major housing allocation, and Sproughton acquired a large modern estate almost overnight.
That has produced an unusual split for a village of this size. Two housing types, built roughly a century and a half apart, and a rooflight job that is technically almost unrecognisable between them.
The thing people get wrong about new-build roofs
There is a widespread assumption that a new roof is an easy roof. Straight timbers, no rot, no surprises. Half true. The timbers are straight and the geometry is clean. But almost every house built in the last forty years, and certainly everything on the new Sproughton allocation, has a trussed rafter roof, and a trussed rafter is not a rafter.
A traditional cut roof is made of rafters, purlins and ceiling joists, each doing a job you can reason about. Cut one rafter, put a trimmer either side, transfer the load, done. A trussed roof is a set of prefabricated triangulated frames, each one designed as a single component and calculated as a whole. Every diagonal web in a fink truss is carrying either compression or tension. Cut a web to make room for a rooflight and you have not weakened the truss slightly, you have invalidated the design.
So on a Sproughton new build, the rule is simple. We fit between the trusses. Nothing gets cut.
Why that is actually good news
Trussed roofs are set out at regular centres, almost always 600mm. That means the clear space between two trusses is around 550mm once you allow for timber width, and there are standard roof window widths designed precisely to sit in that gap. The installation becomes a clean, quick job: strip the covering back, form the opening in the sarking and battens, fit the unit to the trusses either side, dress the flashing kit into the tile profile, retile.
If you want more glass than one bay allows, the answer is not a wider unit. It is two units in adjacent bays with a rafter of truss between them. Visually that reads well, and it distributes daylight across a room far better than one big hole in the middle of the slope. Plenty of our pitched roof skylight installations on modern estates are paired for exactly that reason.
Where the room genuinely needs a single large opening, a structural engineer has to design the alteration and specify replacement support. That is a real option, it is just a different budget and a different timescale, and we will say so at survey rather than after.
New-build warranties and structural work
A new house typically comes with a structural warranty running for ten years. Cutting structural timber without proper design is exactly the sort of thing that gets a claim declined later. Fitting between the trusses does not disturb the structure at all, so it does not put you in that position. It is worth checking your own warranty documentation before any roof work, and worth keeping the paperwork from the installation. We provide a written specification of what was fitted and how, which is the document you will want if anyone ever asks.
The old village core
The older part of Sproughton is a different proposition. Traditional cut roofs, irregular rafter spacing, sometimes purlins running through exactly where you wanted the window, and coverings that range from clay pantile to slate to later concrete tile. Here we can cut and trim, because that is what a cut roof is designed to tolerate, but the sizes have to be worked out from the actual timbers rather than assumed.
The other constant in the village core is the covering profile. Flashing kits are made to match specific tile profiles, and a plain-tile skirt fitted over a deep pantile roll will never seat properly no matter how much sealant goes near it. We match the kit to the covering measured on site. If you are fitting a VELUX, Keylite or Roto unit the flashing is ordered alongside the window for that reason.
Extensions and the flat-roof question
New estates generate rear extensions faster than almost anything else, usually within five years of the houses being occupied. Most of those extensions have flat roofs, and a flat roof is where a flat roof rooflight or a roof lantern makes the biggest difference to a dark kitchen.
The details that matter on a flat roof are the upstand height and the fall. The kerb needs to stand proud enough that ponded water and wind-driven rain cannot reach the glazing seal, and the deck needs a designed fall so water actually leaves the roof. A rooflight sitting on a dead-flat deck with a low upstand will let you down, and it will do it in the third or fourth winter rather than the first, which is what makes it expensive.
On the new estate: if your loft has attic trusses rather than fink trusses, you already have a usable room shape and a much easier conversion. Attic trusses have a clear void designed in. Worth checking before you assume a conversion is off the table.
Fitting between the trusses, in practice
Working between the trusses on a new Sproughton roof is not quite as simple as sliding a window into a gap, and it is worth knowing what it involves. A trussed roof is held square not only by the trusses themselves but by diagonal bracing and longitudinal binders running across them, and those are part of the engineered system too. They cannot just be cut and left. So forming the opening means stripping the covering back over the bay, cutting the sarking and battens cleanly, fixing new timber to the trusses either side to carry the unit, keeping or reinstating any bracing that crosses the opening, then dressing the flashing kit into the tile profile and retiling. Done properly it leaves the roof as stiff as it was and the warranty untouched. Done by someone who cuts a brace to get the window in, it does neither, and that is the corner a specialist does not cut.
Keeping the warranty paperwork straight
On the new allocation the structural warranty is worth taking seriously, because it is the document that pays out if the structure ever moves, and it is also the document an insurer will scrutinise if a claim is ever made. The principle is simple. Anything that alters the engineered structure without proper design is the sort of thing that gets a claim questioned later, and cutting a truss web is exactly that. Fitting a rooflight in the clear bay between two trusses does not touch the engineered structure at all, so it does not put the warranty at risk. What we hand over is a written specification of what was fitted and how, which is the paperwork you want in a drawer if anyone ever asks. It is worth reading your own warranty documentation before any roof work, on any part of the house, so you know where the lines are before a saw goes near them.
The old core, and fabric that behaves differently
The lanes of the original village are a world away from the estate. Cottages here have solid walls, lime mortars and coverings that range from clay pantile to slate, and the fabric was built to breathe rather than to be sealed. That changes how a rooflight is detailed, because wrapping impermeable modern layers tightly around old timber can trap moisture where it was never trapped before. On these roofs we keep the detailing breathable and the ventilation paths open, match the flashing kit to the covering profile measured on site, and work within the existing rafters rather than assuming the neat centres of a modern roof. The two Sproughtons need genuinely different habits of mind, and the survey settles which one you have before anyone quotes a figure.
Getting a price in Sproughton
Every job is surveyed on the roof and priced once in writing. The figure does not change unless you change the specification. Installations carry a 10-year workmanship guarantee and are installed to current Building Regulations.
Sproughton is right on our doorstep, and we work the same way through Bramford, Chantry and down to Copdock. The full list is on areas we cover.
Request a fixed quote for a rooflight in Sproughton. Tell us roughly when the house was built and we can usually tell you whether you are looking at a between-the-trusses job or a cut-and-trim one.
My house on the new Sproughton development is only a few years old. Can you fit a rooflight without affecting the warranty?
Yes, provided nothing structural is cut. Modern estate houses have trussed rafter roofs, and we fit rooflights in the clear bay between two trusses rather than through them. That leaves the engineered structure untouched, which is the thing a structural warranty cares about. We give you a written specification of what was fitted so you have the paperwork if it is ever queried.
Why can’t you just make the opening wider by cutting a truss?
Because a truss is calculated as one component and every web member is carrying load. Removing a web does not weaken it a little, it invalidates the design entirely. If you genuinely need a single wide opening, a structural engineer designs a replacement support, which is possible but changes the cost and the timescale. In most rooms two units in adjacent bays give better light spread anyway.
The older cottages in the village have odd rafter spacing. Is that a problem?
Not a problem, just a reason to survey properly. Hand-cut roofs in the old part of Sproughton often have rafters at varying centres and sometimes a purlin running right where you wanted the window. We open up, measure what is actually there, and size the trimmers to the real span. It is the kind of roof you cannot quote accurately from a photograph.
Do I need planning permission for a rooflight in Sproughton?
Usually not. Permitted development generally allows a rooflight projecting no more than 150mm above the roof plane and sitting below the ridge. The new estate is not in a conservation area. If your property is in the older village core and is listed, that changes things and we will flag it at survey.
What paperwork should I keep after the rooflight is fitted?
Keep the written specification we hand over, which sets out what was fitted and how, alongside your structural warranty documents. On a new-build the warranty is what an insurer scrutinises if a claim is ever made, and it questions anything that altered the engineered structure without proper design. Fitting between the trusses does not touch that structure, so it keeps you clear, and the specification is the evidence of that if anyone ever asks. It is worth reading your own warranty terms before any roof work on any part of the house.
Is fitting between the trusses really as simple as it sounds?
Simpler than cutting, but not nothing. A trussed roof is braced with diagonals and longitudinal binders that keep it square, and those are part of the engineered structure as much as the trusses are, so they cannot be cut and abandoned. Forming the opening means stripping the covering over the bay, cutting the sarking and battens, fixing new timber to the trusses either side to carry the unit, keeping or reinstating any bracing that crosses the opening, then flashing and retiling. Done that way the roof stays as stiff as it was. It is quick in experienced hands and a mess in the wrong ones.
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.