These roofs keep your home cooler during the hot summer months.
Hybrid flat roof detail.
The roofs can fail if the roof assembly is not properly installed or insulated or if the outside air is unable to absorb moisture faster than it is accumulated.
In each case the name refers to the position of the insulation in relation to the roof deck.
The two classic types of flat roof designs are the warm flat roof and the cold flat roof.
A hybrid cold flat roof is one where at least 2 3rds of the insulation is above the roof deck or joists.
The roof itself is therefore kept warm.
By majority the rule of thumb is that in a domestic house not flats approximately a third of the total thermal performance of insulation can be placed below the deck with two thirds above the deck sometimes this is called a hybrid warm roof.
A warm flat roof is.
Traditionally flat roof constructions fall in to two camps.
Some observers suggest it s harder to replace a flat roof than a traditional pitched shingle roof because of the labor required to remove its layers especially on older flat roofs.
We would recommend a condensation risk analysis be carried out on every hybrid flat roof construction to determine the insulation.
However the construction may still be vulnerable to condensation for example in scotland cold flat roofs are not recommended.
There are three recognised designs of flat roof construction.
In this context the term hybrid flat roof refers to a timber flat roof construction that is insulated both between and over the joists.
Warm cold and inverted.
Ventilation is not needed in a warm roof.
Warm flat roofs and cold flat roofs.
In the case of a flat roof insulation is usually in the form of either a rigid board above the deck or a fibrous quilt immediately above the ceiling depending on the type of roof construction.
Hybrid roofscombining elements of both cold and warm flat roof design hybrid roofs appear to offer the best of both worlds when it comes to maximising thermal performance while limiting constructional depth.
These roofs do allow a bit of heat to escape from your home through the roof in the winter months.
Flat roofing solutions the xtratherm range of high performance insulation boards provides the ideal technically advanced solution for flat roof projects.
Flat roof design guide.
But now flat roofs often are constructed with fewer layers because of improved waterproofing technology.
This could mean flat roofs may not raise the same red flags they used to.
Hcontrol hybrid hybris boost r hybrid or boost r hybrid roof can be installed but please note in accordance with bs 5250 it is crucial to introduce 50mm cross ventilation together with a vcl.
Flat roofs are hard to replace.
In addition there s a third type the warm flat roof with airflow that s essentially a hybrid version of the warm flat roof and the cold flat roof.
