R&D Roofing explain the warm flat roof construction process by providing key information on the legalities behind upgrading your insulation.

This guidance offers guidance on the difference / benefits between warm and cold roofs. A warm deck/roof is where the insulation is placed on top of the rafters/joists and the roof covering...

Apr 3, 2022 · A warm flat roof or a built-up roof (BUR) is one where all the insulation is above the joists/deck, making it part of the warm fabric of the building. The insulation is immediately below the waterproofing layer.

Aug 10, 2024 · Unlike traditional roofs that require sloped insulation to create a cold roof space, warm roofs allow for flat or nearly flat constructions, maximizing usable space atop and within buildings. This design flexibility makes warm roofs especially appealing in urban environments where space is at a premium.

This article explores the differences between the two roof constructions. Firstly, a flat roof is any roof construction with a pitch of 10 degrees or less. In flat roofing, the term ‘warm’ or ‘cold’ applies to the structural substrate, typically a plywood, OSB, profiled steel or concrete roof deck.

Warm roof systems benefit from the insulation sitting above the deck. This enables the temperature of the structure and the deck to be kept close to the temperature of the inside of the building (hence warm). The insulation is tapered to provide a fall to the roof to enable water to run to the water outlets.

The warm deck method keeps the roof deck and its various components at nearly the same temperature as the building’s interior throughout the year. It also adds protection against condensation from the room below as any moisture vapor gravitates upward into …

This article looks at the different types of flat roof construction, including cold roof and warm roof.

Warm roof construction involves laying rigid insulation on top of the roof rafters. This allows the area below the insulation to be as warm as the living areas. This method is now widely used in the flat roof industry, but it is very difficult and expensive to adapt this type of insulation to a sloped residential style roof.

The main advantages of a warm flat roof are as follows: it is economical to install as all the work is carried out above the roof joists, the insulation is in a continuous quilt , and there are less things which can go wrong.