2002 provides guidance on the principal forms of construction.
Cold deck flat roof scotland.
The insulation is below the deck but above the plasterboard.
A cold deck is constructed as follows.
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.
Cold roofs and warm roofs.
In general the installation of a cold roof is not recommended for the construction of new properties.
Cold roofs have the waterproof layer placed directly onto the roof deck and the insulation inside the roof just above the ceiling.
Cold flat roofs are found in many homes around the uk though they are not recommended these days and are actually banned in scotland.
In this case ventilation is required and the roof can still become wet with condensation which may cause materials to decay.
They should be avoided therefore because interstitial condensation is likely and its effect on the structure and.
For cold flat roofs the vapour layer needs to be positioned underneath the insulation layer on top of the room below to create an effective barrier.
Refurbishing an existing timber joisted flat roof which has no insulation.
No ventilation is required for these types of roofs.
This is used for refurbishment e g.
As the insulation is not required to take any loads quilts and other loose fill materials can be used as well as rigid insulation.
This video shows the key features of a flat roof cold deck construction and how to draw the details to a scale of 1 10.
For the control of condensation in roofs including cold deck roofs bs 5250.
In a cold roof the thermal insulation is laid between the joists below the structural deck.
There is evidence that suggests that condensation in cold deck flat roofs is a problem.
The epdm rubber roof membrane is then installed using the contact adhesive onto the deck.
There are two types of flat roof.
The full deck was re boarded and an icopal monar plan single ply membrane system was fully installed as seen in the before and after photos.
Which ventilation solutions are available.
The insulation material is placed immediately above the ceiling between the rafters.
The 18mm roof grade deck is then fixed on top of the rafters leaving suitable air flow between the insulation and the deck.
We have worked on may project for bizspace over the years and this particular one saw a flat roof stipped back to the metal deck on an office block in livingston.
