For getting quotes for a flat roof area, it is helpful to have knowledge of the typical materials used for such areas.
Built-Up Felt
The method uses several layers of bitumen-soaked felt. The oldest of all flat roofing methods, built-up felt roofs are currently the cheapest short-term option but have a life expectancy of around 10-15 years. In very cold weather the felt can also crack.
EPDM Rubber Membrane
The single-layer rubber EPDM sheet is fixed to the roof using either glues or fixings and is highly flexible allowing for temperature expansion & contraction. With a proven long-term performance record of thirty years plus EPDM rubber is a popular choice for extension roofs.
GRP Fibreglass
GRP is applied as a liquid resin, such as fibreglass that sets to form a smooth surface. Although it is one of the most durable types of flat roof, the roof must not be too large as it can develop cracks due to movement.
TPO and PVC Single-Ply
TPO and PVC single-ply roofing membranes meet recognised construction product standards and are designed to resist UV degradation. Typical lifespan of these types of flat roof systems is 20-30 years.
Modified Bitumen Torch-On Felt
The Modified Bitumen Torch-On Felt has been improved upon from the traditional flat roof felt. It is a cost effective option lasting for approximately fifteen to twenty years, and is typically used on most flat roof shapes.
Choosing Between Them
Influence of budget, usage, local environment etc. It’s generally considered that flat roofs in Hampshire are best served by fully sealed waterproofing systems in the form of EPDM or GRP.
If you want Flat Roofs Hampshire, https://www.randsroofing.co.uk/roofing-services/flat-roofs-hampshire is a good place to start.
Understanding what you are buying before committing to a contract is important and will enable you to ask appropriate questions when obtaining a quote.