Flat roofing in Cadnam and Bartley
Flat roof repairs, re-covering and warm roof build ups across Cadnam, Bartley and the SO40 villages. Free site visit, free written itemised quote.
The site visit is free and so is the written itemised quote. Thomas Hannen prices every job himself.
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Most flat roofs around Cadnam and Bartley can be re-covered without a rebuild. The deck under the old covering is what decides that, so the first visit is about getting under a corner of it, not about a figure.
Trouble in Cadnam and Bartley usually starts with a survey, a pool or a split upstand. A survey has flagged the flat roof during a sale. There is a pool up there that has not shifted since the last downpour. Or the covering has blistered and split where it turns up against the house. These are Forest edge villages of detached houses with room around them, which at least means we can usually get a tower up and look at the thing properly rather than guess at it. A lot of that housing dates from the late 1960s and early 1970s, so the coverings are the originals and they have stopped bending. We walk the roof, check the falls and the outlets, look at every junction with the main building, and photograph the lot before anyone talks money. If the covering has let go at the house wall and water is coming indoors, ring 07435 839745 and say so.
The jobs
From a porch roof to a full re-cover

First, we find the real fault. Ceilings stain a long way from where water gets in, so we work backwards along the falls rather than cutting where the mark is.
On a Cadnam and Bartley flat roof the cause is often a blocked outlet, or else a lifted seam, a cracked fold, a blister that has gone, a perished upstand or a trim that has lost its grip. Every one of those is an hours job, and we would rather do the hours job and tell you honestly what the roof has left in it.
Then the strip, and the look underneath. Once a surface is past bending it comes off in one go and the deck is exposed. Plywood and OSB usually survive. Chipboard on a Cadnam and Bartley roof of this age usually does not, and where it has swelled or gone soft it is replaced and the joists checked. This is also the only honest moment to talk about falls, because a roof that holds water was built wrong rather than worn out. Firrings, or insulation cut on a taper, put the run back in towards the outlet.
Then the build up. Given a bare deck we would far rather make it a warm roof than repeat a cold one. Rigid PIR goes above the deck with a vapour control layer below it, so the timber stays warm, the dew point sits outside it and interstitial condensation has no cold surface to form on. Insulation stuffed between joists with no air path is what rots a flat roof from beneath, and it is why BS 6229:2025 on flat roofs and, where there is a room underneath, Approved Document L, both send the insulation upwards.
Then the covering, and every edge of it. EPDM rubber for a plain rectangle, bonded down as one sheet. GRP fibreglass laid wet and cured into a single skin with its trims for anything that gets walked on. Torch on felt, three layers built up under a mineral cap sheet, for a roof broken up by upstands. Single ply, welded at the joints, for a large span. After that come the parts that actually leak. A kerb formed for a rooflight, a lantern, a Velux, a hatch, a soil pipe or a vent pipe. An upstand with a cover flashing chased in where the roof meets the wall. An apron in lead where lead is already there, and a cavity tray where the wall has a cavity. Parapet and coping made good, drip and edge trim set out, gutter, hopper and downpipe running clear. Two to three working days for a garage or a small extension.
How it runs
Re-covering a garage or dormer roof, from the first visit

Thomas prices a flat roof from on top of it, not from the drive. Round Cadnam and Bartley the usual candidates are a felted garage built onto a sixties or seventies house, a kitchen extension off the back, or the box dormer on a chalet bungalow, and plenty of those went down on chipboard.
On a Cadnam and Bartley roof he peels back an edge to see the boards, walks the deck feeling for soft spots. Your quote breaks out each part: getting up there, taking off the felt, deck boards if they need replacing, firrings to put a fall back, insulation, the new membrane, then every upstand, outlet and length of edge trim, and the skip.
A Cadnam and Bartley job sits on one written quote from start to finish. A single garage roof in Cadnam and Bartley is normally stripped and made watertight in a working day, so nothing sits open to the weather overnight. The drive gets swept before we go each evening, and the old felt goes away with us. If the deck is worse than that lifted corner suggested, we stop and show you, with a price.
A like for like re-cover counts as maintenance, and the Planning Portal guidance on roofs explains where that ends. Planning decisions sit with the National Park Authority, and permitted development inside a National Park is tighter than elsewhere, so a new extension or a change of roof shape is far more likely to need consent. Bartley has conservation area status and Cadnam village does not; the Park's map settles which applies to you. Laying a new deck over a habitable room is a building control job either way.
Cost
Why two flat roofs of the same size price differently

Flat roofs are not priced by the square metre here. Measuring a Cadnam garage takes a minute; what decides the price is under the felt.
Chipboard or ply. Garages and extensions from the sixties and seventies in Cadnam and Bartley were often decked in chipboard. Once it has taken water it goes soft and bows, and there is no saving it. Ply or boards that are still firm can take a new covering. That difference is invisible from the lawn, which is why Thomas lifts a corner before he writes anything.
Ponding, and where it drains. A puddle that sits in the middle of the garage roof for days means the deck was laid dead flat or has sagged between joists. Tapered firrings restore the fall and add time, but without them a new membrane fails early. Outlets, the upstand where the roof meets the house, and each run of edge trim are priced individually, because that is where leaks start.
Which system. EPDM rubber, GRP fibreglass and torch-on felt in two or three layers all cost different amounts. Where the roof is over a heated room, a new deck brings the insulation under Approved Document L, so building control are involved.
Reaching it. A garage beside a gravel drive in Cadnam and Bartley, or any single storey extension, is usually done from a tower. A chalet bungalow dormer needs scaffold that stays up while the deck is open, which is a separate priced line under the rules for working at height, and so is the skip.
A rival quote should say whether it is rubber, fibreglass or felt and in how many layers, whether the chipboard is coming out, and whether the roof will be given a proper fall.
If it is coming through
A garage or extension roof letting water in
Water through a flat roof over a garage or kitchen needs a bucket first; then pull boxes, bikes and anything electrical clear. Call rather than using the website form.
A split in old felt, a burst blister or a membrane peeled back at the upstand lets rain straight onto the boards, and chipboard keeps drinking it long after the shower has passed. We make it watertight on that first call, with a weighted tarpaulin or a patch across the split, so what is underneath can dry while you decide on the proper job. Scheduled work is Monday to Friday, 8am to 6pm. If rain is getting in, phone, and should nobody answer you will get a call back as soon as we are free.
Worth knowing
In the National Park, what can be seen is what gets looked at
The useful thing about a flat roof in a National Park is that most of them cannot be seen. A garage roof behind a hedge or an extension roof at the back of the house is invisible from the lane, and the Authority has no interest in what colour it is. That is worth knowing, because people assume every job inside the Park boundary turns into a planning exercise, and a straight re-cover does not.
Where it does matter is when the roof is part of what you see from outside. A garage that sits gable on to the road, an extension that reads across open ground, or a flat roof you can look down on from higher ground are all in view, and there materials and finish get proper scrutiny. So does anything that changes the shape of the building. National Park heritage and conservation guidance is the place to start, and if your own house is one of the listed buildings around Cadnam and Bartley then consent comes before any change of material, not after. Tell us the address when you ring and we will say plainly whether you are looking at a roofing job or a planning job first.
Who you are dealing with
The firm behind the flat roof quote
From Boscombe it is 17.5 miles up the A31 to Cadnam, and we cover Bartley, Copythorne, Winsor, Netley Marsh and the rest of the SO40 side of the Forest. The National Park Authority deals with planning here, and a new deck over a room is a New Forest District Council building control matter.
The company to look up is Bournemouth Roofing & Building Ltd, registered in England and Wales, company number 15471719. It belongs to Thomas Hannen, and it is Thomas who climbs onto your garage or dormer to price it. A verified customer has scored us 10 out of 10 on Checkatrade. His visit is free and so is the written, itemised quote. Before you book a visit in Cadnam and Bartley, you can read our customers' Google reviews, word for word, on our reviews page.
Planning at a glance
Do you need planning permission in Cadnam and Bartley?
Most repairs in Cadnam and Bartley need no application at all. What decides whether a change to the outside of your house does is who the council is, whether a conservation area or a listing applies, and whether the place sits in a protected landscape.
| Question | In Cadnam and Bartley |
|---|---|
| Who decides | New Forest National Park Authority is the planning authority for Cadnam and Bartley. New Forest National Park Authority's heritage pages set out what it controls. |
| Conservation area | Yes: Forest North East Conservation Area. Check whether your street is inside the boundary before changing anything visible. |
| Listed buildings | Yes, there are listed buildings in and around Cadnam and Bartley. If yours is one, work can need listed building consent. |
| Protected landscape | Inside the New Forest National Park, where design is looked at more closely and permitted development rights are narrower. |
Questions
Questions about flat roofs in Cadnam and Bartley
Do I need permission to re-cover a flat roof in the National Park?
Not for a like for like re-cover. Putting a new covering on an existing roof is maintenance, so there is nothing to apply for and no fee. It changes if you alter the shape of the roof, raise it, or convert the space beneath it into a room. If your house is listed, ask before anything is ordered.
What is the difference between a warm roof and what I have now?
Most older flat roofs are cold roofs, with insulation between the joists and a cold deck above it. A warm roof puts rigid insulation above the deck with a vapour control layer under it, so the timber stays warm and dry. It builds the roof up thicker, which is why upstand heights and door thresholds get measured at the survey.
How long will it take, and how much mess?
A garage or a small extension is two to three working days. The dirty part is the strip out, and that is the first morning. Nothing is left open overnight, the site gets swept at the end of each day, and the old covering and decking leave with us rather than sitting on your drive.
Can you do it in winter?
Yes, with an eye on the forecast. Cold is not really the problem, damp is, because a bonded or torch on system wants a dry deck. We would rather open a roof on a settled day than get halfway and sheet it over. Repairs and temporary covering carry on whatever the weather does.
Nearby, and next door
Flat roofing near Cadnam and Bartley
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Get a price for your Cadnam or Bartley flat roof
Tell us the address and what you have noticed. We will come out, look under the covering where we can, and put an itemised price in writing. No charge, and no obligation.