Hot Flat Roof Construction

There are several methods and materials for the design of the exterior surface of a warm or cold flat roof.

Hot flat roof construction.

All three types of flat roofing cost 250 to 350 per square 100 square feet but prices vary according to region and size of the roof. Unfortunately the term hot roof is a misnomer as the roof really is not that much hotter than a normal roof. A hot roof is one where there is. Of course you don t need to live in a modern house to deal with a flat roof.

No ventilation is required for these types of roofs. Built up roof bur the traditional hot tar and gravel. Most studies show anywhere from 1 to 5 maximum increase in surface temperature during the sunniest part of the day while at night the surface temperature drops faster than a regularly vented roof. It must provide adequate protection against the elements keeping the buildings structure and interior dry.

A system most likely to be found in newly built homes. For that reason cold flat roof construction needs to keep in mind the need for unblocked airflow. Known technically as elastomeric or plastomeric roof membrane depending on the material single ply roofs come in a few different varieties including. The membrane roof is the latest roofing technology and is also the roof of choice in commercial construction.

A warm deck roof is where the insulation is placed on top of the rafters joists and the roof covering is then placed over the insulation. The 3 most common materials used for flat roof construction. Flat roofs aren t architecturally logical as rain and snow will shed much more quickly off a sloped roof. Hot tar and gravel.

A roof is defined in bs 6229 as a flat roof if it has a pitch of 10 degrees or less. The term hot roof is something of a misnomer as the attic space will only be a few degrees warmer than in a. How hot roofs differ from traditional roofs. Yet for historic modern style buildings like this old house s cambridge tv project flat roofs are at the core of the architecture meant to reflect the broad horizontal lines of the natural landscape.

Attics typically have an insulated floor and have ventilation. 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. 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. Flat roof types.