Flat To Pitched Roof Conversion

Curtis Moore have carried out extensive flat to pitched roofing projects, whereby metal clad roofing systems have been installed to newly formed structures secured to the existing roof construction.

Time expired built up roof coverings can often be costly to completely strip off and renew with multi-layer bitumen felt systems. As a cost effective option, a flat to pitched roof conversion is often an economic and desirable alternative to consider.

There are various methods of providing a pitched structure, however the most common forms are that of lightweight modular systems whereby rafters are fabricated from pre-formed components, and assembled at existing roof level. Not only are these systems cost effective and fast to erect, but the lightweight nature of the system makes it suitable for most building where increased loadings would normally have presented a problem.

The Project illustrated opposite is a recently completed contract carried out by Curtis Moore in 2003.The 5,500 sq.m. Building houses a carpet manufacturing facility in Ayrshire, and had been experiencing on-going roofing problems for several years.

The existing roof comprised of a metal deck which had been covered with a traditional built-up roofing specification. In 1993, the complete roof had been over-sprayed with a urethane foam system, making the overall thickness of roof build - up in excess of 300mm.

Curtis Moore were called in to offer specifications and costs for complete roof refurbishment. Various options were considered ranging from built-up and single ply roofing, to a flat to pitched proposal. The only acceptable form of flat roofing would have involved a complete strip which proved to be cost ineffective due to the labour content involved.

The existing roof was supported by a portal steel structure which was set at 10 metre bays. Due to the large span, the lightweight modular systems were unsuitable, and Curtis Moore designed a steel post system which can be seen from the photographs opposite.

The project included the introduction of new galvanised steel eaves guttering and associated drainage alterations to accommodate the new roof structure. Work was completed over a four month duration and the Client's production operations continued without disruption throughout the construction period.