Most roof problems in Bromley can be fixed with a few new tiles or a length of fresh flashing, and a decent roofer will tell you so. But there comes a point where each repair only buys a winter or two, and the money is better spent on a new covering. These are the eight signs that tell you which side of that line your roof is on.
A large share of the housing around Bromley, Shirley, West Wickham, Hayes and Beckenham was built between the wars. Many of those 1930s semis still have their original clay or concrete tiles, often laid with no underlay at all or over an old bitumen felt that has since gone brittle. Victorian and Edwardian terraces nearer Penge and Beckenham usually have natural slate held on with iron nails that have been rusting for a century.
As a rough guide, concrete tiles last 50 to 60 years, natural slate 80 to 100 years or more, and old bitumen felt underlay around 40 to 50. Felt flat roofs on extensions and garages often manage only 15 to 20. If your roof is at or past those ages, faults tend to arrive together rather than one at a time.
You can check most of these from the ground with binoculars, or from inside the loft with a torch. Do not climb onto the roof yourself.
Replacement is not always the answer. If the roof is under 30 years old, the damage is confined to one area, and the underlay and battens are sound, a targeted repair is usually the sensible and cheaper choice. Lead flashing around a chimney, a cracked valley, or a handful of storm-damaged tiles can all be put right without stripping the roof.
The honest test is what lies underneath. A roofer should be willing to lift a few tiles, show you photographs of the battens and felt, and explain what they found. If the timbers are dry and the fixings are holding, patching is reasonable. If the battens snap in the hand, it is not.
For a typical three-bed semi in the Bromley area, a full strip and re-tile commonly falls somewhere between £8,000 and £15,000, including scaffolding. Natural slate, hipped roofs, dormers, chimneys and any rotten timber found once the old covering is off will all push that higher. A terraced house with a simple pitched roof may come in lower. Treat these as ballpark figures: a firm price needs a proper inspection.
The work usually takes one to two weeks, depending on the weather. It involves scaffolding, stripping the old covering, fitting breathable membrane and new treated battens, then tiling, ridges and leadwork.
Two local points are worth knowing. Replacing more than a quarter of a roof falls under Building Regulations, which normally means bringing loft insulation up to current standards and having the work signed off, either by Bromley Council building control or by a roofer registered with a competent person scheme. And if you live in one of the borough's conservation areas, such as parts of Chislehurst, Beckenham or Bromley town centre, check with the council's planning team before changing the roofing material.
A properly fitted concrete or clay tiled roof should last 50 to 60 years or more, and natural slate can go beyond 80. The modern breathable membrane and treated battens underneath are a big part of that lifespan.
Usually not, if you are replacing like for like on an ordinary house. Conservation areas and listed buildings are different, so check with Bromley Council's planning team before changing the material or appearance.
Yes, if one slope is in much worse condition, which is common on the weather-facing side. It costs less in the short term, though you pay for scaffolding twice if the other side follows a few years later.
Tell us about the job and we will get a quote back to you, most days the same day.