Royston is a town in Hertfordshire sitting on the chalk edge. Cambridge Roofers covers Royston and works on the full range of property types you find here, from older slate and clay tile roofs to more modern concrete tile roofs. We are on hand for everything from a slipped slate to a full re-roof.
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Royston lies in Hertfordshire at the foot of the chalk scarp, with good rail links to Cambridge and London. The town grew up in the medieval period around an Augustinian priory, reflected in the character of its older buildings.
Repeated freeze-thaw cycles work on mortar joints, clay tiles and the pointing around chimneys every year. These are ordinary conditions for a UK roof, and a well-maintained roof handles them without difficulty - but maintenance deferred over several years tends to catch up quickly.
Slate and clay tiles perform well when maintained, but both have weak points that develop over time. Natural slate is fixed with iron nails that corrode, releasing the slates progressively - a condition known as nail sickness. When slates start slipping on a roof that otherwise looks sound, nail sickness is usually the cause. Replacing individual slates as they go is a reasonable short-term strategy; a full re-slating is the proper solution when the problem is widespread.
Clay plain tiles on Victorian roofs can suffer from frost damage on cold-facing slopes, with the face of the tile lifting away over time as moisture in the body of the tile expands and contracts. Replacing plain tiles requires care to match the size and profile of the originals - standard modern machine-made plain tiles do not sit correctly on a roof pitched for handmade tiles and can leave gaps that let in wind-driven rain.
Concrete tiles themselves are durable, but the mortar bedding on ridge and hip tiles breaks down with frost and rain over ten to twenty years, and loose ridge tiles are a common cause of water entry. Re-bedding or replacing with a dry-fix ridge system is the most effective solution; dry-fix systems use a mechanical clip and flexible pointing strip rather than mortar, removing the ongoing risk of mortar failure.
The underlay beneath concrete tiles on roofs of this age is often thin bitumen felt that has become brittle. When underlay fails, any water that gets past a slipped or cracked tile drops straight onto the ceiling below rather than being caught and directed to the eaves. A re-roof that replaces both tiles and underlay is a more thorough job than just replacing tiles on top of failed felt.
Traditional built-up felt roofing has a useful life of around ten to fifteen years in normal conditions. Patching extends the life of a flat roof only so far; once the felt is cracking or blistering across the whole surface, a full replacement is more cost-effective than continued patch repairs.
EPDM rubber membrane is the most practical replacement system for most domestic flat roofs. It is a single-ply sheet material that bonds to the roof deck, tolerates UK temperature ranges without cracking, and can be installed without hot works. Typical UK flat roof replacement costs for EPDM systems run from around £70 to £120 per square metre, so a standard garage roof or modest extension flat roof might cost between £900 and £2,500 depending on size and deck condition. The critical detail to get right is the upstand and flashing where the flat roof meets any wall - this junction is the most common point of water entry.
The flaunching - the sloped mortar collar around the base of the chimney pots - cracks and loosens with frost, and lead soakers and step flashings around the base of the stack are a regular source of leaks. Checking the chimney at the same time as any other roof work saves the cost of a separate scaffold erection. Where a chimney is redundant, taking it down to just below the roofline and capping it with lead is the most practical approach. A single chimney removal typically costs between £1,000 and £2,500 in the UK, depending on height and access.
For retained chimneys, the mortar joints between the bricks should be checked for softness or crumbling. On Victorian brickwork, a lime-compatible repointing mortar is preferable to hard Portland cement, which can cause the softer brick faces to spall as moisture is trapped behind an impermeable joint.
Rot in the fascia board often extends further than is visible once the first soft spot appears. uPVC fascia and soffit replacement is the practical long-term solution, removing the need for repainting and eliminating the rot risk. Installed costs for soffit and fascia replacement in the UK typically run from around £90 to £130 per linear metre depending on the profile and the complexity of corners and angles.
Gutters on older properties are worth inspecting when any work takes scaffolding. Joints that have separated, or downpipes that have pulled away from the wall, allow water to run down behind the fascia and into the roof structure. Clearing the gutters at the same time as any repair visit is straightforward and worth doing every autumn before leaf fall is complete.
Compressed or settled insulation loses a significant proportion of its thermal performance over time. Topping up the existing insulation is usually straightforward in an accessible loft, but the eaves ventilation gap - the channel between the top of the insulation and the underside of the felt at the eaves - must remain clear. Blocking this gap causes warm, moist air from the house to condense on the cold felt and timbers in the roof space, which leads to mould growth and, in time, timber decay.
On roofs being re-felted as part of a tile replacement job, breathable roofing membrane has replaced traditional bitumen felt on most new installations. Unlike bitumen felt, a breathable membrane allows moisture vapour to pass through from the roof space, reducing the risk of condensation without requiring the same level of eaves ventilation. It is a practical upgrade when the roof is already being stripped for other reasons.
Whether the job is a repair or a full re-roof, getting the scope in writing before work starts protects you. A clear written quotation should specify the exact materials being used, what access equipment is required and who provides it, and how the site will be left at the end of each day.
Cambridge Roofers covers Royston and the surrounding Hertfordshire and Cambridgeshire villages. Call us to arrange a roof inspection and a written quotation before you commit to any work.
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Call any time. Calls are answered day and night and passed straight to our roofers.
