Any type of roof from tpo to epdm can be either hot or cold. Although flat roofs are cheaper to build than pitched roofs they have a shorter life span.
The two classic types of flat roof designs are the warm flat roof and the cold flat roof.
Roof detail flat. Waterproof membrane to prevent water penetrating the structure and interior of the building. There are design differences for each type. The details so important to the various forms of flat roof construction e g.
Drawing via buildingregs4plans to put together a warm deck roof it s important that the insulation be positioned above the structural deck the layers that make up the ceiling. Commercial roofing specs and details find the resources you need to design the best roofing system for your project. Whether you re in the design phase or on the roof we can provide the tools and support to get the project done right.
100 dan road canton ma 02021 phone 1 800 451 2504 sales 1 866 255 3738. The examples of construction. A lot of stored water can build up so a leak can be a very big problem instead of a little stain on a ceiling.
Starting from the bottom hot roofs have the roof deck then insulation then the roofing material. The answer depends on the type of roof you have. Edges junctions with walls penetrations and drainage are dealt with here in depth.
Cold roofs have insulation beneath the roof deck which is beneath the roofing material. Cad details document name pdf dwg download all cad construction details 37 1 mb 3 4 mb mc01 identification of roof areas 156 kb 167 kb mc01a single layer underlayment 173 kb 302 kb mc01b double layer underlayment 162 kb 322 kb mc02 vent pipe flashing 144 kb 349 kb mc03 valley. Zero ventilation space is required and the construction appears stacked and compact.
How much ventilation does a flat roof need. A tiny leak goes right into the house. A cold roof or hot roof.
Typical details for a warm flat roof u k. 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. It depends on where the insulation is installed.
Underneath the basics flat roofs are usually constructed with a ceiling nailed to joists which support a deck usually wood in residential construction a vapor barrier insulation and a roof board. Low slope flat roofs are challenging to build and fail more often and more disastrously than steep roofs. A roof is considered to be flat when it is of a slope of 1 5o to the horizontal.
A flat roof usually consists of the following. From there the flat roof system you choose will determine the materials you apply. Most have no redundancy.