So it makes the job entirely more complex and increases the timescale of the project extensively.
Insulation flat roofs cold roofs.
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.
It requires the existing roof surface to be ripped up so that the insulation can be laid in between before a new roof surface is then placed over the top.
Introduction warm cold roofs this guidance offers guidance on the difference benefits between warm and cold roofs.
See our flat roof insulation solutions.
The roof may be described as warm deck or cold deck depending on whether the insulation is above or below the main solid roof layer.
As there are two types of flat roofs available that require different types of insulation the methods used.
This means there is a vapour control layer in the ceiling and cross ventilation at the eaves or the top of the walls.
However cold roof insulation on an existing flat roof system is anything but simple.
Adding insulation to an existing flat roof generally requires the removal and replacement of some of the existing structure.
Both these variants require different approaches to insulation which will be covered in this guide.
Most old flat roofs can be insulated however sometimes the cost becomes restrictive take an example of a flat roof that got a bedroom under it and above a balcony opens up onto the flat roof the step of the door out onto the roof is only 50mm above the existing roof.
Our range of high and optimum performance flat roof insulation products are suitable for use in a range of flat roofs.
Refurbishing an existing timber joisted flat roof which has no insulation.
How to insulate a flat roof.
Ventilation is required for these roofs.
Here we share the most common mistakes people make when installing flat roofing insulation.
Cold flat roof insulation.
This may help with condensation but causes such a loss of heat that it has been banned in scotland.
Insulation is placed in between the joists underneath the roof surface above.
A cold flat roof is one where the insulation is between or between and below the roof joists.
Roofing insulation is one of the most important and misunderstood building components.
Lots of traditional flat roofs are of the cold roof construction type.
The insulation is below the deck but above the plasterboard.
A cold roof has the insulation placed below the structural deck which thus remains cold.
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.
This is used for refurbishment e g.
