New Build Roofing specialists in Cosham. Coastal specification, 10-year guarantee, free written quotes with no call-out fee.
Tell us the job in 30 seconds. No pushy sales, no call-out fee.
📞 Call Now: 0239 307 1334Cosham's Portsea Island coastal microclimate requires new build roofing to be specified for the coastal environment from the outset. Marine-grade stainless fixings are the correct specification for all new build work here.
We provide building regulations compliance documentation on all Cosham new build roofing. All work is to current British Standards. NFRC registration provides proof of competence for developers and self-builders.
New build flat roof sections in Cosham must be specified for coastal conditions from day one. We specify GRP as standard on all new build flat roof sections in this area.
| Service | Cost | Notes |
|---|---|---|
| New build pitched roof per m2 | 65-95 | Marine-grade fixings membrane tiles |
| New build flat roof GRP per m2 | 95-130 | 25-year guarantee |
| Developer package pricing | POA | Volume and phased projects |
| Building regs compliance pack | Included | All new build projects |
"1930s chimney repointing — Portsmouth Roofing used lime mortar, explained why OPC cement would cause spalling. Correct decision."
"Fascia replacement on our 1930s semi — the 1980s UPVC had finally given up. New run fitted with correctly calculated fall angles."
"1930s semi on Drayton Lane — re-roof, Portsmouth Roofing was honest that the tiles were past repair. Specified the correct modern equivalent."
A full re-roof is the right call when repairs keep recurring, nail sickness affects multiple slopes, or the covering has reached the end of its life for its type.
When it is not the answer: If the tiles are sound but the fixings have failed, a strip-and-relay re-fix costs far less than a full replacement Read the full guide.
Portsdown Hill shelter reduces salt slightly, but 1930s concrete tiles here are shedding surface aggregate at 85–90 years old. Cosham's 1930s semis have generous simple roofs with good access, though mature avenue trees complicate scaffold and skip placement. It is why we specify marine-grade fixings and correct lead codes as standard on Cosham roofs — the coastal environment punishes anything less.
We assess the whole roof — covering, fixings, timbers and underlay — and confirm whether re-roofing or re-fixing is the honest answer.
An itemised fixed quote: materials, marine-grade fixings, scaffold, waste and guarantee, with no vague allowances.
We book the work and erect scaffold; most re-roofs start within a fortnight of acceptance.
Strip, inspect and replace defective timbers, fit breathable underlay, batten and re-cover with marine-grade stainless fixings to BS 5534.
Full site clear, waste removed, final inspection and your transferable 10-year guarantee handed over.
| Job | Typical duration |
|---|---|
| Terrace roof re-cover | 3–5 days |
| 3-bed semi re-roof | 5–8 days |
| Detached / complex roof | 1–2 weeks |
| Added timber or structural repair | +1–2 days |
| Scaffold erect and strike | Included in programme |
Sustained rain or high wind pauses stripping — we never leave a roof open overnight and weatherproof at the end of each day.
A full re-roof always needs scaffold to every elevation for safe working and materials handling. Scaffold is specified for: the full duration of any re-roof — it is included and itemised in the quote, never a hidden extra - always itemised in your written quote, never a hidden extra, and we arrange it.
Cosham's 1930s semis have generous simple roofs with good access, though mature avenue trees complicate scaffold and skip placement. Pavement scaffold and skip permits go through Portsmouth City Council; allow a few working days on streets like High Street, Wootton Street, Spur Road where space is tight.
| Job | Typical range | Notes |
|---|---|---|
| Slipped or cracked tiles | £150–£350 | Per visit incl. access |
| Leak diagnosis & repair | £150–£500 | Depends on water travel |
| Chimney flashing | £200–£600 | Code 5–6 lead |
| Valley repair | £400–£900 | Strip and re-lay |
| Nail-sickness re-fix (per slope) | £600–£1,200 | Estate stock |
Worked example: A typical job on a property off High Street in Cosham, including access and waste removal, sits in the middle of the ranges above once surveyed.
No deposit on repairs under £500. Staged payments on re-roofs — nothing up front before materials are on site. All prices include VAT; written itemised quote before any work.
Covering PO6 and surrounding postcodes.
The complete re-roof carries a 10-year written workmanship guarantee, transferable if you sell, with manufacturer warranties on tiles and underlay on top.
If a fault appears in covered work, we come back and put it right. No quibbling, no re-charge.
A re-roof means a week or more of scaffold, skip and daily activity — we protect the garden and drive, keep the site tidy, and agree access and parking before we start. You do not need to stay home for external work - we just need power and access agreed in advance.
Re-roofs run through most of the year; we programme around forecast weather and stage the strip so the roof is never exposed to a wet night. Portsdown Hill shelter reduces salt slightly, but 1930s concrete tiles here are shedding surface aggregate at 85–90 years old.
Yes new build pitched and flat roofing across Cosham. Developer and self-build projects. Call 0239 307 1334.
Marine-grade stainless ring-shank as standard. Standard galvanised is inadequate in coastal conditions.
Yes compliance documentation provided on completion.
Yes we work with developers on phased projects. Volume pricing available. Call 0239 307 1334.
GRP fibreglass as standard. Not felt-based systems which require replacement within 10 to 15 years here.
Yes free specification survey and written quote. Call 0239 307 1334.
Yes. NFRC registered, fully insured, 10-year written guarantee.
Cosham sits at the northern approach to Portsea Island — slightly inland from the harbour but within the island's salt-influenced microclimate. Frost incidence is similar to Portsmouth generally but the 1930s semi concentration creates a specific repair profile across the suburb.
Cosham and adjacent Drayton are dominated by 1930s semi-detached properties — original concrete plain tiles now 85 to 90 years old and showing advanced surface aggregate erosion. Many properties are at or past the repair vs replace decision point.
Cosham new build work at the northern island approach requires coastal-adjacent specification — marine-grade stainless fixings and frost-resistant mortar for the dual salt and frost exposure at this transitional position. Every job we carry out in Cosham is specified for these specific conditions — not a generic Portsmouth-wide approach.
No call-out fees. No obligation. New Build Roofing specialists in Cosham.
0239 307 1334