Dedham, Nayland and the Colne Valley villages

Three layers of designation

Conservation areas covering the village cores.

Listed buildings in high concentration, many of them timber framed and several centuries old.

A nationally designated landscape in Dedham Vale, which means the setting of a building is part of the assessment even where the building itself is unremarkable.

All three can apply to one property, and they are assessed separately.

What that means practically

The working assumption is that any rooflight will be assessed. On listed stock, listed building consent is the normal path rather than the exception.

That is not a reason not to proceed. It is a reason to start with the conservation officer rather than with a product, which takes days rather than the weeks an application takes and routinely saves a wasted one.

The roofs

Clay pantile and plain tile over timber frames that have moved. Pantile is the harder covering for a flush unit because of the deep roll, and soakering a conservation rooflight into it properly is skilled work that takes longer.

It is worth the time. A correctly bedded unit is nearly invisible from the lane; a badly fitted one is the first thing you see.

Visibility from open country

Different from a town. A roof here may be seen from a footpath half a mile away, so a slope hidden from the street is not necessarily hidden.

Checking actual sightlines rather than assuming from a plan is worth the walk.

What we do

Check the designation before quoting, start with the officer, and say plainly where a proposal is unlikely rather than taking a fee for an application that will fail.

Two valleys, one set of constraints

The Stour valley villages, Dedham, Nayland, Stoke by Nayland, Bures, Boxted and Langham, and the Colne valley settlements, Earls Colne, White Colne, Wormingford and Fordham, share a building stock and a planning environment.

Timber framed cottages and farmhouses, handmade clay plain tile and peg tile coverings, steep pitches, and a very high concentration of listed buildings. Conservation areas covering most of the historic cores, and over the Stour valley the additional weight of the Dedham Vale National Landscape.

Rooflight work here is entirely possible and it is a different exercise from the same job on an estate. Three things dominate: consent, historic timber, and the covering.

Establish what applies before anything else

Listing. Listed building consent is required for a rooflight on any slope, front or rear, whether or not anybody can see it. The listing covers the whole building inside and out, including roof timbers that may themselves be significant. There is no small works threshold and a sun tunnel is not exempt for being small.

Conservation area and Article 4. A conservation area does not by itself remove permitted development rights for rooflights on a house. An Article 4 direction does, and in villages of this quality directions are common, frequently on elevations fronting a highway. It is a short enquiry to the council rather than a judgement call.

Landscape designation. The Dedham Vale National Landscape affects how an application is determined rather than whether one is needed, with considerable weight given to conserving the character of the valley in longer views.

We check all three for every address we quote, because the answer changes what we would recommend and occasionally whether we would recommend proceeding.

Timber framed buildings

The defining characteristic of this stock, and the thing that decides where a rooflight can go.

Many of these houses are timber framed, frequently behind later frontages. A Georgian brick face on the street can conceal a structure two hundred years older, and the roof is often the oldest surviving part.

Rafters, purlins, tie beams and wall plates may be original, irregular in section, not straight, and part of what is listed.

Three consequences.

Position is dictated by the structure. An opening is placed to avoid historic timber rather than cut through it, so the survey establishes where a rooflight can go before anybody discusses what it should be.

Made to measure is likely. The clear span between historic rafters is whatever it is and rarely matches a catalogue size. Several weeks of lead time, and it has to be planned around.

The building moves. It has been moving for centuries and will continue to. Fixing has to allow for seasonal movement rather than clamping a rigid modern unit into a frame that flexes, which is how a seal ends up stressed and fails early.

Handmade clay, and what it means for the work

Plain tiles and peg tiles dominate, with slate on some nineteenth century additions.

Old handmade clay is the most demanding covering in this trade. The tiles are small, laid in double lap so every point has two thicknesses over it, irregular by nature, and brittle with age.

They have to be lifted individually over an area larger than the opening, because the double lap means you cannot remove a rectangle. A proportion breaks whatever care is taken.

Matching a weathered handmade tile is genuinely difficult: colour, texture and camber all vary, and a new machine made tile looks wrong beside an old handmade one even where the dimensions match.

The usual answer is to take sound tiles from a rear or hidden slope, use those around the new opening, and place the replacements where they cannot be seen. On a listed building that approach may itself need describing in the consent application.

What is underneath

Frequently nothing. A roof that has never been stripped may have no underlay at all: tiles hung on riven battens with the rafters visible from inside.

Modern rooflight weathering assumes a membrane to lap into. Where there is none, the detail is built around the opening instead: an apron formed and dressed to carry water past the opening onto the battens and covering below.

Entirely workable, more time, and it should be priced rather than discovered on the day. On a period property in these valleys it should be anticipated as a matter of course.

Long views, and describing them honestly

Specific to this area and worth taking seriously.

The valleys have rising ground on both sides. A rear slope that would be entirely screened in a flat village is frequently visible from the lane opposite, from higher ground, or in longer views across the valley.

Officers here know those views well. An application that presents a rear slope as invisible when it plainly is not damages your credibility on everything else in the submission.

Say which slope, which direction it faces, and what it can be seen from. Where a unit genuinely is screened by the ridge, by planting or by the fall of the land, say so and explain why. Where it is visible, say that too and explain what makes the proposed unit acceptable anyway.

What gets approved

A conservation rooflight: sitting low against the plane of the covering rather than standing proud, upright rather than wide in proportion, with a central glazing bar, in matt black.

The profile matters more than the other three combined, which is why the manufacturer’s section drawing showing how far the unit stands above the tiles is the document that decides an application.

Where an existing modern rooflight or plastic dome is being replaced with a conservation unit, say so explicitly. That is a heritage improvement.

Where a sun tunnel is the answer

Worth raising because these cottages frequently have internal bathrooms and landings with no external wall and no available slope.

A sun tunnel is the least visible daylight option there is. The roof component sits close to the covering and reads as a very small rooflight, the intervention is one opening between rafters rather than a trimmed structural opening, and it is largely reversible.

Those are genuine arguments to put to a conservation officer, and we have seen tunnels consented in these villages where a full rooflight was refused.

It still needs listed building consent. It is not exempt for being small.

Timescales and access

Consent is the long part rather than the fitting: months for a listed building application, with several weeks on top for a made to measure conservation unit.

Start the application first and order the unit second. Ordering before consent is where money actually gets wasted on these buildings.

Access in the village centres is tight: narrow lanes, limited parking, frontages close to the road, and in places no side access to the rear. Scaffold on the highway needs a licence and time to arrange. On the outlying farms and cottages access is generally excellent, with space for a tower on private land.

What the roofs are made of here

Plain clay tile predominates, with pantile on later buildings and thatch on the oldest. Slate appears on Victorian additions and on estate buildings rather than on the original cottages.

That matters because the covering decides more about a rooflight than the product does.

On plain clay tile a low profile conservation unit sits well: the tiles are flat and finely coursed, a flat profile flashing lies tight, and cuts fall in manageable places.

On pantile the profile is deep and a unit stands proud whatever is specified. Achievable, and the honest target is a unit sitting as low as the profile allows rather than genuinely flush.

On thatch the answer is almost always no rooflight, or a detail designed with the master thatcher.

What is behind the tiles

Traditional cut roofs, hand cut timber, irregular rafter spacing, and a purlin running horizontally partway up the slope.

The purlin is not a member to cut, and on many of these roofs its position decides where a rooflight can go before anyone considers the view from the lane.

Rafter spacings vary bay to bay. The clear span at the position you want has to be measured rather than assumed, and that irregularity is the commonest reason a made to measure unit is genuinely necessary here.

Frequently no underlay at all, which is normal on a period roof and means the detail is built around the opening rather than lapped into a membrane. More time, and it should be priced rather than discovered.

The consent position

A high proportion of buildings in these villages are listed, and the conservation areas are well protected with Article 4 directions in places.

Which means the sequence is consent first, order second, on almost every job. A bespoke unit ordered before consent has weeks of lead time and no resale value.

A pre application conversation is worth having. Officers here deal with this regularly and will indicate what would be acceptable.

The proposal most likely to succeed

A low profile conservation rooflight with a central glazing bar, matt black, on a rear or side slope, sized to sit between the existing rafters and positioned clear of the purlin, submitted with the manufacturer section drawing.

Two modest units frequently read better on a small cottage roof than one larger one, and they are easier to place around the structure.

Access

Narrow lanes, soft verges and frequently no room for a scaffold at the front. Worth establishing early, and worth doing everything in one visit while the access is up.