What to Expect From a New Extension Roof in Bridgend

Across Bridgend, from older terraces to the estates around Brackla and Pencoed, extensions are a common way to gain space. The new roof is the part that joins the old house to the new build, and it is where problems tend to appear if the planning is rushed. Here is how the work normally runs, and what to settle first.

Choosing the shape of the roof

Extensions come with a few usual roof forms: a lean-to or mono-pitch against the back wall, a hip or gable that continues the main roofline, or a flat roof. The right one depends on window heights, the pitch of the existing roof, and how much light you want inside.

We look at what is already there first. Matching the covering and pitch of the old roof usually gives the neatest result, and we will say plainly if a different pitch would cause a drainage or leak problem. Your builder's drawings may also fix some of these choices, so send them to us early if you have them.

Where the old roof meets the new

The junction is the most important detail. Where a lean-to meets the house wall, a stepped lead flashing is cut into the brickwork and dressed over the covering. Where a new pitch joins an old one, a valley has to carry water away cleanly. On older Bridgend houses, the existing roof or wall may not be quite square or level. We allow for that on site rather than forcing the new work to a drawing that does not fit.

How the work is staged

Timing matters because the roof is what lets the plasterers and electricians start work indoors. We agree with your builder when we are needed, so the roof is not left open to the weather. If the weather turns, we cover the work properly overnight, and we tell you straight away if a delay is likely.

• Timber structure goes on first, usually once the walls are complete and checked.
• Breathable membrane and battens follow, so the shell is made weathertight quickly.
• Tiles or slates are fixed, then ridge and verge details are completed.
• Leadwork, fascias, soffits and guttering finish the job.

Rainwater, ventilation and insulation

An extension roof still needs to breathe. Whether the ceiling is flat or follows the rafters, there has to be an air path to carry moisture out, and insulation has to be fitted without blocking it. Your builder or designer sets the insulation, and we fit the roof to suit. Guttering and downpipes should be planned alongside the roof, because a new roof adds water to a part of the house that did not shed any before. We make sure it has somewhere to go.

What to agree before we start

Decide who is supplying the roof design, whether you want the covering to match the main house, and how the scaffold and access will work around your garden. An extension may need planning or Building Regulations checks, and we advise before work starts. If you are using a separate builder, tell us early. We can price the roof alone or alongside other roofing work on the house, and a joined-up schedule keeps disruption down.

Why Choose T & T Roofing South Wales

We're new roof installation specialists covering South Wales, using premium tile and slate roofing systems and honest advice — not a generic call-out. Every job starts with a free quotation and guaranteed workmanship throughout.