Warm Roof Construction Ventilation

A warm roof construction allows heat to be conserved within a property without the need for a ventilation system.

Warm roof construction ventilation.

A warm roof construction has many benefits over a traditional cold roof essentially it is a breathable roof construction which allows moisture to escape which in turn prevents damp and any associated decay problems. In pitched roof construction thermal insulation can be placed horizontally at ceiling level cold roof. The need for roof space ventilation is eliminated or reduced. Figure 2 warm roof construction.

Thermal bridging is largely eliminated as the insulation is continuous over the whole roof structure. 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. The ceiling space is on the warm side of the insulation. Introduction warm cold roofs this guidance offers guidance on the difference benefits between warm and cold roofs.

Where the insulation is placed above the structural deck warm deck and either above or below the waterproofing. Cold roofs and warm roofs. Approved document c2 requires that roofs be designed and constructed so that their structural and thermal performance are not adversely affected by interstitial condensation. A properly insulated ventilated roof can help to control or prevent the formation of ice dams.

The advantages of warm roof construction. In a warm roof construction the principal insulation. Although there is a low risk of condensation with warm roof construction it is very difficult to seal all joints gaps and penetrations against all water vapour transmission. With the potential of additional living space a cathedral roof design or a conditioned roof void are rapidly becoming the preferred choice of pitched roof construction in the uk.

There is no need for additional ventilation. Ventilation is required for these roofs. These roofs keep your home cooler during the hot summer months. A cold roof design is generally not recommended for new build roof applications due to the added requirement for roof void ventilation and the difficulties in preventing cold bridging through the system.

Ventilated roofs remove moisture from roof cavities structural members sheathing and insulation. In this case ventilation is required and the roof can still become wet with condensation which may cause materials to decay. Inclined along the line of rafters warm roof or positioned within the roof. Because the sheathing is kept cooler roofing materials tend to have a longer life span.

Ventilation building regulations. Eliminating traditional ventilation and the potential condensation risk associated with large voids of cool air make this the optimum pitched roof solution. Cold roofs have the waterproof layer placed directly onto the roof deck and the insulation inside the roof just above the ceiling. Understanding the roof construction of any new build or refurbishment is essential to determine what products are required for the job.