Warm Pitched Roof Eaves Detail

Ventilated roofspace eaves 3 02 timber frame pitched roof.

Warm pitched roof eaves detail.

Negates the need for ventilation products. As well as the small selection of roof detail drawings shown here many of the building notes have a related construction detail drawing with specific dimensions eg rafter sizes spans insulations types for purchase with the building specifications. Warm roof and cold roof construction is also seen in flat roofs discussed later in our flat roof detail article. If ridge or eaves ventilation is not possible ventilation tiles can be used at high or low level to achieve the required airflow.

Detailing a low pitch eaves the lower the roof pitch the. Eaves with over fascia ventilation. Insulating a pitched roof above the rafters is the common method chosen for new builds and re roofing existing detached buildings as it provides superior thermal performance for the building. Warm roof ventilation specification.

If a sprocketted or bell cast detail is used then eaves courses should beno lower than the minimum recommended roof pitch. 25mm at eaves on each slope and 5mm at ridge. Introduction warm cold roofs this guidance offers guidance on the difference benefits between warm and cold roofs. Ventilated batten void warm roof eaves.

Ventilation is required for these roofs. A warm roof construction has many benefits over a traditional cold roof essentially it is a breathable roof. Minimises the thermal bridge at the eaves. A warm roof building will make the entire structure of the building warm in an attempt to avoid any cold bridging.

At eaves on very low roof pitches it can be difficult to achieve an adequate fall for water run off from the eaves course tiles and the underlay. With the potential of additional living space a cathedral roof design or a conditioned roof void are rapidly becoming the. Eaves courses of tiles should be at same pitch as general tiling. Detail description 3 00 timber frame isometric cut away view 3 01 timber frame pitched roof.

Insulating the roof above the rafters is known as warm roof insulation as the rafters are brought into the insulated envelope of the building. Ventilated rafter void gable 3 04 timber frame pitched roof. The following images provide examples of pitched roof details. Roof eaves detail masonry cavity wall ventilated cold roof insulation between and over ceiling joists.

Roof window surrounds can be particularly tricky to detail effectively even though the window flashings work perfectly well at low pitches. For a simple duo pitch roof bs 5250 specifies sufficient ventilation as being. Additional construction details drawings. Ventilation and the potential condensation risk associated with large voids of cool air make this the optimum pitched roof solution.

A cold deck roof is where the insulation is placed between the joists rafters or in between the ceiling joists in the case of a pitch roof.