Warm Roof Vs Cold Roof Ventilation

Namely the insulation layers.

Warm roof vs cold roof ventilation.

Warm roof insulation ensures the entire roof structure is insulated meaning a warm deck roof is more energy efficient than a cold roof. Inclined along the line of rafters warm roof or positioned within the roof. What is a warm roof or a cold roof. You only need ventilation in a cold roof.

Introduction warm cold roofs this guidance offers guidance on the difference benefits between warm and cold roofs. For this type of roof you ll need to have proper soffit vents a ridge or gable vent and ventilation baffles. If you are paying the full price for a vent then you can also expect these features to be present. In pitched roof construction thermal insulation can be placed horizontally at ceiling level cold roof.

Basically there are two options to choose from when insulating a flat roof. A cold flat roof insulation requires more work taking off old boards and replacing them and the roof surface. New roof vents almost always come with screens which prevent unwanted entry of birds and insects into your house. Where the insulation is placed above the structural deck warm deck and either above or below the waterproofing.

Instead the attic has insulation on the floor that separates air between the conditioned and attic spaces. The breakdown warm roof vs cold roof. In cold climates the primary purpose of attic or roof ventilation is to maintain a cold roof temperature to control ice dams created by melting snow and to vent moisture that moves from the conditioned space to the attic ventilation acts to bypass the vapour barrier created by most roof. Ventilation is required for these roofs.

Throughout the balance of this digest the terms attic and roof will and can be used interchangeably. The most commonly chosen and installed roofing system. Cold deck roof 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. Installing a warm roof can be extremely straight forward and simple to do.

In a cold roof the insulation is applied between the rafters but in a warm roof the insulation is applied on top of the existing roof surface. In this way the roof itself is kept cold. When we talk about a warm roof vs a cold roof what we re really talking about is the insulation of the flat roof. A cold roof implies that the attic is not within the conditioned space of the home.

There is no need for additional ventilation. You create a warm roof or a cold roof simply by applying the layers of the roof in a different order. Here are some of the pros and cons of each type of roofing system. Cold roofs by the way are not recommended for high humidity.

A cold roof is where all of the insulation is placed either between and under or completely under the joists or deck. No insulation is on top.