Most post-war roofs in Harlescott and Sundorne have nail sickness. The estates were built between 1950 and 1972 with galvanised cut nails now 53–75 years old — well past their 40–60 year design life. Individual tile repair is a false economy: every tile is held by the same age of nail.
The post-war expansion of Shrewsbury created large residential estates north and north-east of the town centre. Most of this housing was built between 1950 and 1975 using concrete interlocking tile fixed with galvanised cut nails. That tile is now 50–75 years old — directly in the peak nail sickness age bracket.
Galvanised cut nails from the 1950s–1970s have a design life of approximately 40–60 years. When the zinc coating corrodes through to steel, holding power is lost. Tiles begin slipping — initially one or two, then progressively more as adjacent nails fail.
Harlescott's residential estates were developed in three phases: 1948–1955 (now 70–77 years old, advanced nail failure), 1955–1965 (60–70 years, peak nail failure), and 1965–1972 (53–60 years, early-to-mid nail failure). All phases are now past or approaching the nail failure threshold (Shrewsbury Roofing Experts estate age survey, 2024).
Multiple slates or tiles slipping in different locations across the pitch — particularly on both front and rear pitches — is the primary indicator. The critical point: nail sickness cannot be resolved by replacing individual tiles. Every tile is held by the same age of nail. Replacing visible slipped tiles today means more will slip within 6–12 months.
The correct response is a full de-tile and re-fix using stainless steel ring shank nails on new treated battens, with new breathable underlay across the full pitch. Original concrete tiles in acceptable condition can be relaid with new fixings for another 20–30 years of service. Where tiles are significantly eroded, replacement tiles in matching specification are fitted at the same time.
Concrete tiles from the 1950s–1960s are now absorbing significantly more water due to surface carbonation. Where tiles are porous or heavily eroded across more than 30% of the pitch, full replacement may be the better long-term investment. The survey is the decision point — we never recommend replacement when re-nail is correct.
The information in this guide applies specifically to the roofing conditions and housing stock found in Shrewsbury and the surrounding Shropshire area. The correct action for your property depends on the specific housing era, roof material and current condition — all factors that can only be determined by a physical survey.
The most common mistake homeowners make is delaying a survey until an active leak makes the urgency unavoidable. At that point, emergency rates apply, weather and access conditions may be difficult, and the damage may be more extensive than if the defect had been identified six months earlier during a routine inspection. A pre-emptive survey — particularly on properties over 40 years old — consistently identifies developing issues at a point when they are inexpensive to address.
Roofing surveys in Shrewsbury and across Shropshire are free and carry no obligation to proceed with any work. We do not use the survey as an opportunity to recommend work that is not required — our business depends on homeowners returning to us when they genuinely need work, and recommending unnecessary work is incompatible with that model.
Every job starts with a free physical survey. We access the roof, identify all defects and their causes, photograph the condition, and provide a written fixed-price quote the same day or following morning. The quote specifies materials by manufacturer and product name, identifies the access method, includes waste disposal, and shows VAT separately. The price does not change unless you ask us to extend the scope.
We confirm the appointment date and time in writing. We arrive when we say we will. We do not leave the roof in an unsafe or weather-exposed condition. We clean the site before leaving. On completion of re-roof and major works, we issue a written 10-year workmanship guarantee.
No call-out charge, no obligation, written fixed-price quote at every survey.
☎ 01743 537230No call-out charge. Written fixed-price quote. 20+ years local experience.
☎ 01743 537230The most important step before any roofing decision is a thorough physical survey carried out by someone who accesses the roof rather than assessing it from the ground. A survey that does not involve someone on the roof cannot reliably determine tile condition, nail integrity, batten soundness or the extent of any flashing failure. Ground-level assessments — however experienced the assessor — miss defects that are only visible at close range.
A good survey produces a written report identifying every defect found, the probable cause of each defect, the correct repair specification, and a fixed-price quotation with all materials and access costs itemised. You should be able to get a second quote from another contractor on exactly the same specification — if the scope is too vague to allow this, ask for it to be clarified in writing before agreeing to proceed.
In any market with genuine demand and limited skilled supply, the conditions exist for poor practice. Shropshire roofing is no exception. The warning signs in a quotation are consistent regardless of which part of the county you are in: a quote given before a roof has been accessed; a price that is significantly below the market rate without a clear explanation of why; a cash-only payment requirement; pressure to sign up on the day of the estimate; and a refusal to provide a written specification of the materials to be used.
The most effective protection is insisting on a written quote from a contractor you have been able to verify — through NFRC membership, through genuine Google reviews with specific job references and named local locations, and through a verifiable business address. A legitimate contractor welcomes these checks.
Written quotes, no pressure, no cash requirements. 20+ years serving Shropshire homeowners.
☎ 01743 537230A full de-tile and re-nail on a typical 3-bed semi in Harlescott costs £1,800–£3,200 depending on pitch size and tile condition. Free surveys across all SY1 postcodes.
A standard 3-bed semi takes 2–3 days. Both pitches completed before we leave — the roof is never left partially fixed overnight.
Yes. Multiple tiles slipping in different locations across both pitches is the primary indicator. Replacing tiles every 6–12 months without improvement confirms nail sickness.
Depends on condition. Sound tiles without heavy erosion are worth re-nailing. Porous or eroded tiles across more than 30% of the pitch indicate replacement is more economical.
The principles covered in this guide reflect the specific conditions of roofing in Shrewsbury and Shropshire — the housing eras, the climate, the planning constraints and the common failure patterns we see on the same streets year after year. Every property is different, but the decision-making framework is consistent: identify the actual cause, not just the symptom; specify the correct material for the housing era; get the diagnosis in writing before committing to any work; and ensure whoever carries out the work has verifiable insurance and a traceable trading history.
If you are unsure whether your roof needs attention, the lowest-risk and lowest-cost action is a survey. A free survey that finds nothing requiring immediate attention costs nothing and gives you peace of mind. A survey that identifies an early-stage defect allows it to be addressed at repair cost rather than emergency or replacement cost later.
No call-out charge. Written quote. 20+ years local experience.
☎ 01743 537230