When a roof in Eriswell reaches the end of its life, choosing the right replacement material matters as much as choosing the right roofer.
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Once it is clear a roof needs replacing rather than repairing, the next question is what to replace it with. That choice affects the look of your property, how long the new roof will last, how much it costs now, and what maintenance it will need over the years. There is no single right answer for every home, which is why we talk through the options honestly before any work starts.
We carry out roof replacements in Eriswell and the surrounding area. Here is an honest look at the main materials used on pitched and flat roofs, with the real pros and cons of each.
Concrete tiles are the most widely used covering on pitched roofs built from the mid-twentieth century onwards. They are manufactured in a range of profiles and colours, they are relatively straightforward to source, and they are among the more affordable options for a full replacement.
Pros: Lower material cost than slate or clay. Wide availability means matching existing tiles or finding replacements in the future is more realistic. Interlocking profiles shed water effectively and require no complex laying technique.
Cons: Heavier than some alternatives, which can matter if the roof structure is already stressed. Concrete is porous and will absorb moisture over time, which is why moss growth is more common on concrete than on other materials. Colour can fade noticeably over decades. Typical lifespan is around 30 to 50 years depending on quality and exposure.
Natural slate has been used on roofs in this country for centuries. It splits cleanly along its grain, lays flat, and when installed properly on sound battens with a good underlay it is one of the longest-lasting roof coverings available. Quality natural slate from Welsh, Spanish or Portuguese quarries can last well over 80 years.
Pros: Exceptional lifespan when correctly laid. Thin profile gives a clean appearance. Does not absorb water in the way concrete does, so moss takes longer to establish. Retains its appearance well over time.
Cons: Higher material and labour cost than concrete tile. Requires skilled fixing; nailing at the wrong point can cause slates to crack. Sourcing matching slates for future repairs is possible but requires care to get the thickness and origin right. Not every roof structure is designed to carry the weight of slate without assessment first.
Clay plain tiles are the traditional covering for many older properties and are still manufactured today. They give a distinctive appearance and weather to a warm, natural colour over time.
Pros: Very long lifespan; well-fired clay tiles on a sound roof can last 60 to 100 years. Natural appearance that suits older properties well. Does not fade in the way concrete does.
Cons: Plain tile roofs require a steeper pitch than interlocking tiles and more tiles per square metre, so the material cost is higher. Weight is significant. Finding matching tiles for future repairs on an older roof can be difficult if the original manufacturer no longer produces that pattern or colour. Installation is more labour-intensive than concrete interlocking tiles.
Artificial slates are made from a mix of materials including cement, fibre or recycled rubber, and are designed to look like natural slate at a lower cost. Quality varies considerably between manufacturers.
Pros: Lower cost than natural slate. More consistent in thickness than natural slate, which makes laying slightly more straightforward. Some products carry long manufacturer finish warranties.
Cons: Appearance does not always match natural slate closely on inspection, which can matter if you are replacing part of a slate roof and need to blend in. Lifespan varies; cheaper products have performed poorly over time. The long-term track record of some newer products is not yet established in the way that natural slate's is.
For flat roofs on extensions, garages and outbuildings, the two most common options are traditional felt and EPDM rubber membrane.
Traditional built-up felt uses multiple layers bonded together with hot bitumen or torch-on application. It is lower in upfront cost but has a shorter working life, typically 10 to 15 years, after which blistering, cracking and delamination set in. It has more joins than a single-ply system, and joins are where water finds its way in.
EPDM rubber membrane is laid as a single sheet, which means far fewer joins across the whole roof surface. It handles temperature fluctuations better than felt, is less prone to cracking, and typically lasts considerably longer. The upfront cost is higher than basic felt, but when you factor in how long it lasts and what you avoid in repair costs, many homeowners find it better value over the life of the roof.
When comparing flat roof quotes, make sure you are comparing the same system. A cheap felt quote and an EPDM quote are not the same product, and the cheaper price may not be the cheaper choice over ten years.
Whatever covering goes on top, the underlay beneath it and the battens the tiles or slates hang from are critical to how the finished roof performs. Modern breathable underlays allow moisture vapour to escape from the loft space while keeping wind-driven rain out. Older bitumen felt underlays do not breathe and can contribute to condensation and timber decay over time.
When a roof is being stripped back for replacement, the battens should always be inspected and replaced where they show any sign of rot, splitting or insect damage. Laying new tiles on old failed battens is a false economy.
The ridge is where the two roof slopes meet at the top. Traditionally this is bedded in mortar, but mortar deteriorates and needs repointing every 20 to 30 years. Dry-fix ridge systems use a mechanical fixing with a ventilated roll beneath, which removes the mortar completely and performs consistently over a longer period. Worth asking about when you are specifying a replacement.
Flashings at chimney stacks, roof abutments and around skylights should be lead. Code 4 or Code 5 lead is standard for most flashing applications. Avoid any roofer proposing aluminium tape or frame sealant as a flashing material on a replacement job.
We cover Eriswell and the surrounding area. If you are weighing up what material to specify for a replacement, or you simply want a straight opinion on whether replacement is necessary at all, call us to arrange a roof survey and we will walk you through the options without pressure.
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Call any time. Calls are answered day and night and passed straight to our roofers.
