Flat Roofing
Flat Roofing in Basingstoke
Basingstoke's overspill estates were built with thousands of flat-roofed extensions, garages and porches. The original bitumen felt on these structures has long since perished, and many have been through multiple re-felts that only delay the inevitable. We replace failed flat roofs with GRP fibreglass or EPDM rubber — seamless, maintenance-free systems with 25-year guarantees.
Related: EPDM vs GRP — Full Comparison →
How We Install Flat Roofs in Basingstoke
Step one: strip the existing covering completely. We never overlay new material on old — it hides deck problems, adds weight, and voids manufacturer guarantees. Step two: inspect the timber deck for rot, delamination and adequate structural support. Any compromised sections are replaced with marine-grade plywood. Step three: create correct drainage falls using tapered insulation or firring strips — minimum 1:40 gradient so water reaches the outlet rather than ponding.
For GRP, we apply resin and glass fibre matting in controlled conditions, building a seamless shell bonded to every surface including upstands, edge trims and pipe penetrations. For EPDM, the rubber membrane is fully bonded to the prepared deck with all edges and terminations mechanically secured and sealed.
Drainage Design for Basingstoke Properties
Correct drainage separates a flat roof that lasts 25 years from one that fails in five. We calculate required falls from the roof area and outlet position, then build the gradient into the deck rather than relying on the membrane to shed water across a level surface. On Basingstoke properties this matters because over a third of the housing stock dates from the 1960s–70s overspill expansion, so the same failures recur across entire streets.
Guarantees and Aftercare
GRP installations carry a 25-year manufacturer guarantee plus our 10-year workmanship guarantee. EPDM carries 20–25 years depending on the membrane specified. Both need minimal maintenance — clear the outlets twice a year and check the edges annually. We provide written aftercare guidance specific to your roof's design and your property's exposure to trees and debris.
How much does a flat roof cost in Basingstoke? →
Typical Cost Range
Flat Roofing in Basingstoke: £800–£6,000. Free, no-obligation quotes. Call 0125 624 2410.
Flat Roofing Across Basingstoke's Estates
System-built properties across South Ham and Popley frequently have flat roof sections that were part of the original 1960s design. These are not bolt-on extensions — they are integral to the building structure, which makes proper waterproofing critical. We install GRP fibreglass with proper drainage falls calculated to Building Regulations, not just laid over the existing surface.
On newer properties across Chineham and Hatch Warren, flat-roofed rear extensions and garage roofs are common. We see a lot of poorly installed torch-on felt from previous contractors — bubbling, splitting at joints, and ponding water. Our GRP and EPDM installations eliminate all of these problems with a single seamless membrane.
AccessAccess, Scaffolding & Permits in Basingstoke
Most flat roofs are reached from a tower or ladder with edge protection. Scaffold is specified for: first-floor and above, any roof with a walk-on requirement, and anywhere edge protection cannot be safely tower-mounted - always itemised in your written quote, never a hidden extra, and we arrange it.
Most Basingstoke estate housing has generous verges and driveway space, so scaffold and skips drop straight onto private ground. The older streets around the Top of Town are the exception, with narrow frontages and controlled on-street parking. Pavement scaffold and skip permits go through Basingstoke and Deane Borough Council; allow a few working days on streets like Wote Street, Church Street, New Street where space is tight.
