A cold roof has the insulation placed below the structural deck which thus remains cold.
Warm roof cold roof insulation.
Warm roof insulation ensures the entire roof structure is insulated meaning a warm deck roof is more energy efficient than a cold roof.
Flat roof there are three options available.
Insulation is placed over and between the wooden joists above the ceiling of your home s top floor.
The thermal efficiency isn t as good as with warm roof.
If an existing cold roof is to be refurbished consideration should be given to converting the design to a warm roof or incorporating new insulation into the roofing system to improve thermal performance.
The breakdown warm roof vs cold roof.
Cold deck or cold roof is where the insulation is below the roof deck and the associated joists.
Cold bridging occurs when there is a continuous path created through the insulation.
Warm roofs offer a superior thermal performance and therefore come with a higher cost.
A warm flat roof or a built up roof bur is one where all the insulation is above the joists deck making them part of the warm fabric of the building.
Introduction warm cold roofs this guidance offers guidance on the difference benefits between warm and cold roofs.
The insulation can be adhered mechanically fixed or loose laid.
This construction relies on a vapour control layer working effectively and in tandem with a continuous ventilated airspace to disperse the water vapour to atmosphere before it reaches the cold deck and condenses.
The vapour control layer is above the decking but below the insulation.
It has s insulation layer above the rafters and immediately below its weatherproof membrane.
This is often just called loft insulation.
A warm roof building will make the entire structure of the building warm in an attempt to avoid any cold bridging.
Cold loft insulation for pitched roofs.
Typically a gap will have to be left for ventilation because this is a cold area.
Ventilation is required for these roofs.
The simplest and cheapest roof insulation is the classic cold loft option.
However you may not be familiar with these concepts particularly what they mean and the pros and cons of each.
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.
With a warm roof the insulation is installed on top of the existing surface rather than in between the rafters.
A cold flat roof insulation requires more work taking off old boards and replacing them and the roof surface.
Installing a warm roof can be extremely straight forward and simple to do.
The insulation is immediately below the waterproofing layer.
