Flat Roof Installation in Alton

Flat roof installation in Alton for extensions, garages, dormers and porches. We fit rubber, felt and GRP systems with the falls set correctly, so water runs off rather than sitting. Free quotation.

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Rubber, Felt or GRP

EPDM rubber comes as one sheet with very few joins, so there is little to fail. Torch on felt is the lower cost option and does the job well. GRP fibreglass is laid wet and cures hard, which suits balconies and roofs that get walked on.

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Why Falls and Drainage Matter

A flat roof is never truly flat. It needs a slight slope so water reaches the outlet. Standing water is what kills a flat roof early. We build the falls into the deck, so puddles do not sit on the covering through the winter.

Insulation and Warm Deck Build Ups

If the room below is used all year, insulating above the deck keeps the heat in and the condensation out. It is called a warm deck. We talk through whether it applies to your building, because on a garage or a porch it usually does not.

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Frequently Asked Questions

How long does a flat roof last in Alton?

A well laid EPDM rubber roof lasts around 25 to 30 years. Modern torch on felt gives 15 to 20. GRP sits in between. Most early failures come from poor falls or a bad detail at the edge rather than the covering itself.

How long does a flat roof installation take?

A garage or small extension roof is usually done in one to two days. Larger flat roofs, or ones that need a new deck and insulation, take three to four. We need a dry spell for the covering to go down properly, so we watch the forecast.

Can you put a new flat roof over the old one?

We do not recommend it. Whatever is trapped underneath keeps rotting and you cannot see the deck condition. Stripping back means we check the timber and fix the falls at the same time. It costs a little more and lasts far longer.

About us

Prestige Roofing installs flat roofs across Alton on extensions, garages, dormers and single storey side returns. In over 10 years we have fitted rubber, felt and fibreglass systems on all of them. We tell you which covering fits your building and your budget rather than fitting one system to everything.