Sarnafil Cold Roof Ventilation

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Sarnafil cold roof ventilation.

Hopefully this video will help explain the difference between cold flat roof construction and warm flat roof construction this videos show detailed drawings. Sarnafil cold roof ventilation in a cold roof construction the sarnafil membrane is installed directly to the structural decking usually timber with firrings to fall. Sarnafil adhered systems sarnafil adhered roofs are best for low sloped uniquely shaped or pitched roof applications composed of non nailable substrates such as pre cast or pre stressed concrete cementitious wood fiber or gypsum. Since the 1960 s the performance and longevity of sika sarnafil roofs has been demonstrated in.

Sarnafil s327 el is mechanically attached to the substrate using either the sarnafast or sarnabar system and suitable sarnafil fasteners. Mainly due to the added requirement for roof void ventilation and the likelihood of cold bridging occurring. You only need ventilation in a cold roof. A cold roof is where all of the insulation is placed either between and under or completely under the joists or deck.

In this way the roof itself is kept cold. Some of britain s best known buildings feature sika sarnafil roofs and it is the system of choice for applications in education commerce retail leisure travel and many other sectors. This is when a gap appears in the insulation which becomes far colder than the main areas leading to condensation issues. Ventilation is not needed in a warm roof.

They also work well over non nailable substrates such as concrete steel and wood decks. Laps are then hot air welded to form seams which are stronger than the membrane itself. There must be an adequate void minimum 50mm between the deck and the insulation traditionally mineral wool to allow free movement of air and to prevent moisture vapour being transmitted from the building outwards where. Sika s experience would be to avoid cold roof design where possible.

100 dan road canton ma 02021 phone 1 800 451 2504 sales 1 800 576 2358. In a cold roof construction the sarnafil membrane is installed directly to the structural decking usually timber with firrings to fall. There must be an adequate void minimum 50mm between the deck and the insulation traditionally mineral wool to allow free movement of air and to prevent moisture vapour being transmitted from the building outwards where it could condensate in the roof. Installation is carried out by sarnafil trained contractors.

The design of cold roofs usually occurs when external abutment height provision is problematic thus making a warm roof not achievable. Cold roofs are generally considered as difficult to design and construct and future upgrading of insulation requires invasive destructive means which should be kept in mind. Sarnafil type a and type t.