Check who can authorise the work. A landlord, utility, council or emergency service may be the right first contact. This enquiry form is not an emergency dispatch service. Local reporting contacts are below; this enquiry service does not provide emergency dispatch.
What makes a flat roof work
A flat roof needs more than a waterproof surface: its structure, falls, outlets, upstands and junctions must work together. Many apparently flat roofs have a designed fall to move water toward an outlet. Ask an inspector to look at the whole arrangement rather than choose a covering by appearance alone. A wet ceiling beneath an extension could involve an outlet, a junction or concealed damage. Establish what the proposed job includes and whether a repair can address the defect without replacing an otherwise serviceable roof.
Felt, rubber and other systems
Bituminous membranes, EPDM and other proprietary systems have different installation and detailing requirements. No material is automatically best for every extension, garage or balcony. The roof’s shape, substrate, access, intended use and adjoining features matter. Ask which complete system is proposed, who will install it and what preparation it requires. A product guarantee is not the same as a guarantee for workmanship or the existing structure. Compare full specifications, including outlets and edges, rather than treating the surface material as the entire job.
Ask how the chosen system will meet a wall, rooflight or parapet, and how its edges and outlets will be formed. The answer should refer to the installation requirements of the actual product. If an installer proposes applying a new surface over an old roof, ask what condition checks establish that the underlying layers are suitable and whether trapped moisture or added load has been considered.
Ponding and blocked outlets
Standing water deserves investigation of the fall and outlet arrangement. Its significance depends on the system and condition; one photograph does not establish the required remedy. Keep accessible ground-level drainage routes clear where safe, but do not step onto the roof to sweep water away. Report when pooling occurs and how long it lasts. A membrane repair will not correct a badly designed drainage route on its own. If water cannot discharge, ask how that underlying issue will be addressed in the quotation.
Useful next steps
Repairing a local defect
A compatible patch may be suitable for a specific defect where the surrounding roof remains sound. The contractor needs to establish material compatibility, substrate condition and the position of adjoining details. Repeated patches can be a sign that the diagnosis or scope needs revisiting. Ask whether the work is temporary protection or a permanent repair and what evidence supports the choice. Concealed moisture or damaged decking may not be apparent until an area is opened; agree how additional work will be authorised.
Useful next steps
Insulation, ventilation and condensation
Ask how the proposed roof build-up deals with heat loss, vapour and ventilation as well as rainwater. An internal damp mark does not prove the waterproof layer failed. Explain when moisture appears and whether the room use or ventilation changed. The specification should identify the existing construction and the proposed replacement layers.
For an Ipswich council-managed home, report damp or a roof defect through the landlord’s repair route before privately commissioning work. Borough housing policies provide a separate damp/mould route. For a private project, ask the designer or competent contractor which building-control requirements apply; do not cover a moisture problem with a new finish alone.
Sources: Council tenant handbook May 2025 · Housing policies
Extensions and shared or historic buildings
For a new extension roof, agree falls, outlet, upstands, abutments and maintenance access. The waterproof finish is only one part of the construction. Ask who designs the build-up, handles approvals and records the completed work. Establish how a new outlet connects to the lawful drainage route.
Ipswich listed-building advice is relevant when work affects significant fabric, while the actual planning history and building-control route need separate checks. Converted buildings may also have shared roof or lease responsibilities. Do not assume a flat roof at the rear is invisible for permission purposes, or that a managing agent can authorise every alteration without further approval.
Sources: Listed buildings advice · Online Mapping
Comparing flat-roof quotations
Ask whether the quote includes…
Ask for the measured area, system name, preparation, deck work, falls, drainage and junction details. Confirm whether insulation, edge trims, waste removal and access are included. The quote should explain how the building stays weather-protected during work and what happens if the existing deck is unsound. Compare exclusions and warranty terms as well as the total. An inexpensive surface-only replacement may have a different scope from one correcting structural or drainage defects; neither price proves suitability without the specification.
- Confirm the inspected defect and the exact work included.
- Check access, disposal, VAT and permission/documentation responsibilities.
- Agree how hidden damage and any extra costs will be approved.
| Item | Question for the contractor |
|---|---|
| Existing deck | Is it inspected, retained or replaced? How will hidden deterioration be priced? |
| Drainage | Are falls, outlets and overflow arrangements included in the design? |
| Insulation | Who specifies moisture control and any required thermal improvements? |
| Warranty | Does it cover the installed system, workmanship or only a particular product? |
Using and maintaining the roof
Do not treat a flat roof as a terrace or storage platform unless it is designed for that use. Loading, punctures and obstructed outlets can cause problems. Ask what routine checks are appropriate and who should undertake work requiring roof access. Keep records of the system, installation date, alterations and repairs so future contractors can identify compatible methods. Report new leaks, blistering or outlet problems promptly. This enquiry service can help describe the job, but it does not provide a remote condition survey or confirm installation dates.