When your roof in Feltwell starts showing signs it can no longer be repaired economically, a full replacement is the sensible next step - and knowing what to look for early can save you from a much bigger bill.
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A full roof replacement is not the automatic answer to every roofing problem, but there comes a point where patching and repairing costs more than starting again properly. That point arrives sooner than most homeowners expect, and the warning signs are often visible from the ground if you know what you are looking at.
The pitched roofs on older properties share many of the same weaknesses. Concrete tiles have a finite lifespan. Once the surface cement begins to powder off and the tiles themselves become porous and heavy with absorbed moisture, they are past useful life. No amount of pointing or re-bedding the ridge will change that underlying problem.
You do not need to get on a roof to notice the early indicators that something is wrong. Walk back from your property and look at the roof line as a whole. A ridge line that was once straight and now dips or bows in the middle suggests movement in the structure beneath, not just a surface issue. Sagging between rafters shows as a gentle wave along the slope rather than a clean, flat surface.
Cracked, slipped or missing tiles are obvious, but pay attention to the pattern. A few isolated slipped tiles after a windy spell might be a simple repair. Slippage across a wide section of the roof, or tiles that keep working loose despite being re-fixed, points to failing nibs or corroded nails - both signs that the tile itself or the batten it sits on has reached the end of its life.
The verge line along the gable end is another place to look. Loose or cracked mortar bedding along the verge, or tiles that have crept out of line, let water behind the covering and into the roof space. Once that starts, the timber underneath begins to rot. On older properties this can go unnoticed for years because the water finds its way in slowly rather than causing an immediate ceiling stain.
Most roof failures come down to age, moisture and movement - and usually all three working together. Roofing felt (the underlay beneath the tiles) on older properties is bitumen-based and becomes brittle over time. Once it tears or splits, wind-driven rain can get past the tiles and into the roof space even when the tiles themselves look intact from below.
Battens are the horizontal timber strips the tiles hang from. They are in a particularly harsh environment - damp from condensation, exposed to temperature swings and carrying the weight of the covering for decades. Batten rot is one of the most common reasons a roof reaches the point where a full strip and replacement is the only practical option. Replacing individual sections of batten under an existing tile covering is possible, but at some point the tile covering needs to come off to do the job properly, and if the tiles are also at end of life it makes no sense to put them back.
Frost damage also plays a part. Water gets into hairline cracks in tiles or mortar joints, freezes and expands, and the crack opens a little more each winter. After enough freeze-thaw cycles the mortar in ridge bedding crumbles, allowing the ridge tiles to rock. A rocking ridge tile is not just a cosmetic issue - it lets water straight into the vulnerable junction at the top of the roof where the two slopes meet.
Lead flashings around chimney stacks and at abutments with walls are another failure point. Lead has a long service life when correctly installed, but poorly dressed lead, lead that has been patched repeatedly with roof sealant, or lead that has simply oxidised and cracked over several decades will let water track down behind the flashing and into the wall or ceiling below. When a flashing fails repeatedly it is usually a sign it was not detailed correctly in the first place.
Valleys - the channels where two roof slopes meet - are one of the highest-risk areas on any pitched roof. They carry a concentration of water every time it rains and are often where the first serious leaks develop. Lead-lined valleys and mortar-bedded tile valleys both fail eventually; the mortar shrinks and cracks, and the lead can lift or crack if it was not given enough room to expand with temperature changes.
When we strip a roof back for a full replacement, valley details are rebuilt from scratch using new lead or modern dry-fix valley systems where they are appropriate. Getting this right is not optional - a badly detailed valley on an otherwise new roof will cause problems within a few years.
Ridge tiles are bedded or dry-fixed along the apex of the roof. Traditional mortar bedding needs maintenance every ten to fifteen years and will eventually need full re-bedding. Dry-fix ridge systems use a mechanical fixing with a ventilated cap and avoid the cracking mortar problem entirely. On a full replacement we discuss both options so you can make an informed choice.
A full roof replacement starts with a proper assessment before any work begins. We inspect the rafters, the existing felt, the battens and any lead or flashing work. This is the stage where hidden problems come to light - rafter ends that have softened where the wall plate has held moisture, or sections of decking where water has been pooling unnoticed.
The existing tiles or slates come off first. Depending on the age and condition of the tiles, some may be salvageable for use on a smaller section or outbuilding; most concrete tiles from the 1970s onward are not worth re-using. Once stripped, any damaged timbers are repaired or replaced before the new breathable membrane is laid. Modern breathable underlays do a significantly better job of managing moisture in the roof space than the old bitumen felt, and they are now standard practice on a full replacement.
New treated battens go over the membrane, then the new tile or slate covering. For a like-for-like replacement on a traditional property we would typically use concrete or clay plain tiles, interlocking concrete tiles or natural slate depending on what suits the house and the budget. Each material has a different profile, weight and expected lifespan, and we go through the options before ordering materials.
Ridge, verges, valleys and any flashings around chimneys or abutments are completed as part of the same job. A replacement that leaves old lead or crumbling mortar at the junctions is not a replacement - it is a new covering on an old problem.
Costs vary with the size of the roof, the pitch, the material chosen and the access required. As a broad guide, a full pitched roof replacement on a typical three-bedroom semi-detached house in this part of Norfolk using concrete interlocking tiles will run from around £6,000 to £10,000 depending on the factors above. Natural slate costs more, typically £8,000 to £14,000 for the same size of house, because the material itself is more expensive and slating is slower work.
These are not fixed figures - every roof is different, and there is no substitute for having someone look at your actual roof before any number is put in front of you. What matters is that the quote covers every element: strip and disposal of the old covering, timber repairs if needed, new membrane, new battens, new covering, new or refixed flashings, and new ridge and verge details.
We cover Feltwell and the surrounding area. If your roof is showing any of the warning signs described above, the right first step is to have someone look at it properly before the damage works deeper into the structure.
Call us to arrange a roof survey so we can give you a clear picture of what needs doing and what it will cost.
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Call any time. Calls are answered day and night and passed straight to our roofers.
