Plain-English definitions of common roofing terms for Basingstoke homeowners. Call 0125 624 2410 for help.
Corrosion of iron nails holding concrete roof tiles. As nails corrode they lose grip, causing tiles to slip. Extremely common on Basingstoke 1960s–70s estates where fixings are 50–60 years old. Modern replacements use stainless steel or aluminium that resist corrosion indefinitely.
Mechanical fixing replacing mortar on ridge tiles. Uses clips and a ventilated roll to grip each tile independently. Flexes with thermal movement, provides ventilation, and resists wind uplift through mechanical grip rather than adhesion.
Glass Reinforced Polyester flat roofing. Liquid resin and glass fibre cure into a rigid seamless shell bonded to every surface. No joints or laps. Typically carries a 25-year guarantee. Ideal for extensions and walkable flat roofs.
Ethylene Propylene Diene Monomer — synthetic rubber membrane for flat roofing. Supplied in large sheets bonded to the deck. Flexible, lightweight, and fast to install. Carries a 20–25 year guarantee. Best for simple rectangular areas.
Lead sheet dressed into junctions between roof surfaces — chimney to slope, dormer to main roof, wall to roof. Provides critical waterproofing at every junction. Code 4 lead (1.80mm) is standard; code 5 (2.24mm) for valleys and heritage.
Raking out old crumbling mortar from chimney brick joints and replacing with new. Cement mortar for post-war chimneys. Lime putty mortar essential on pre-1920s chimneys where cement would trap moisture and damage soft brickwork.
Designated area of special architectural interest with planning controls on visible changes. Old Basing has a conservation area covering its historic village centre. Roof work must use like-for-like materials.
Factory-made triangular timber frames instead of traditional cut timber. Standard on UK housing from the 1960s. Lighter and faster to erect but some early 1960s examples show instability when tie members are damaged.
Need help? Call 0125 624 2410 for a free, no-obligation conversation.
Roofing quotes are full of terms most homeowners never encounter elsewhere. That creates an information gap which makes comparing quotes genuinely difficult — if you do not know what dry ridge is, you cannot tell whether a quote including it represents better value than one that does not mention it at all.
Understanding these terms puts you in a stronger position. You can ask specific questions, compare specifications rather than just headline prices, and recognise when a quote omits something important. A roofer who explains their specification clearly and welcomes questions about it is usually a roofer whose specification stands up to examination.
A complete quote should specify: the tile by manufacturer and product name, the batten size and treatment grade, the membrane type, the fixing material, whether dry ridge and dry verge are included, the lead code for any flashings, scaffold provision, waste disposal arrangements, and the guarantee terms in writing. If any of these are missing, ask before comparing the quote against others.
For repairs the list is shorter but the principle is identical: what exactly is being replaced, with what material, fixed how, and guaranteed for how long. A quote reading simply "repair roof — £450" tells you nothing you can compare or hold anyone to.
"Roof coating" or "tile sealant" marketed as extending roof life by decades is generally an overpriced paint that addresses none of the structural issues that actually matter. "Lead substitute" or "flashing tape" specified as a permanent solution will fail within ten to twenty years where proper lead lasts fifty. "Re-bed ridge" without mentioning dry ridge means mortar that will need doing again. None of these are automatically dishonest, but each warrants a direct question about expected lifespan.
Call 0125 624 2410 to speak to a roofer directly — not a call centre and not an answering service. We answer during working hours and divert to an on-call number outside them for emergencies. If we are on a roof when you call, leave a message and we will ring back the same day.
For non-urgent enquiries you can also email us and we will respond within one working day. For emergencies, always call — email is not monitored overnight and a roof leak does not wait.
We cover every neighbourhood in Basingstoke — Popley, Winklebury, Brighton Hill, Chineham, Kempshott, Hatch Warren, Old Basing, South Ham, Oakridge, Buckskin, Beggarwood, Lychpit and Black Dam — plus the surrounding towns and villages of Tadley, Whitchurch, Overton, Kingsclere and Oakley. Rates are identical across the whole coverage area with no travel surcharges.
Gauge is the distance between batten centres, which determines how much of each tile is exposed to weather. Lap is the overlap between courses. Both are specified by the tile manufacturer and getting either wrong compromises weatherproofing regardless of material quality. Verge is the roof edge at a gable. Hip is the external angle where two slopes meet. Valley is the internal angle. Eaves is the lowest edge where the roof meets the gutter.
Underlay, sometimes called sarking felt, is the membrane beneath the battens providing secondary weatherproofing. Modern breathable membranes allow water vapour to escape while blocking liquid water — a significant improvement on the bitumen felt used until the 1990s, which trapped moisture and rotted battens from below.
Rafters are the sloping timbers carrying the roof covering. Purlins are horizontal beams supporting rafters at mid-span. Wall plates are horizontal timbers on top of the wall that rafters sit on. Ridge board is the timber at the apex. In a trussed rafter roof these elements are combined into prefabricated triangular frames, which is why cutting any member of a truss without engineering advice can compromise the whole roof.
Soaker is a small piece of lead fitted under each tile course where a roof meets a wall. Step flashing covers the soakers and steps down the slope, chased into mortar joints. Apron flashing is a single piece dressed over tiles at the base of a chimney. Back gutter is the flashing behind a chimney where water collects. Flaunching is the sloped mortar around chimney pots. Each has a specific function and skipping any of them creates a leak path.
No call-out fees. No obligation.
0125 624 2410