Flat Roof Connection Detail

In flat roof constructions protection against summer overheating is important as especially with dark coverings solar gains can be enormous.

Flat roof connection detail.

On a basic level flat roof construction comes in the form of roofing timbers or joists as they are more commonly known or steels that are laid across two uprights walls in most cases. 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. The unique combination of high density high specific heat capacity and low thermal conductivity gives nbt solutions the effect of thermal mass that would normally be associated with green roofs. Armourfix and armourvalley membranes must be installed and extended 60 90 cm up the main roof underneath the shingles in order to assure a waterproof connection.

Along with the benefits of a flat roof come unique challenges. The most critical of these issues is the flat roof drainage systems. A very important detail is where the flat roof is connecting the pitch roof. Yes even flat roof to wall intersections are not being properly done.

Your building and location can help determine which drain will fit your roof needs. The flat roofing material must go up the wall a minimum of 12 or up the wall and over the top of the wall if the wall is less than 12 high. From there the flat roof system you choose will determine the materials you apply. Other roof protrustions sothat notiiing obstructs tiieflow ofair from eave to ridge.

In the warm flat roof construction there is insulation packed into every possible space where air can flow. There are three types of drain systems commonly used on flat roofs. There are roof coating products available if there isn t enough slant or slope to accomplish this. Cold roof insulation between rafters wnapor barrier on warm side below orw sheatiiing roofing roofing 2 x 8 sleepers notched for vent aligned wi rafters flashing over rooang fascia sheatiiing 2 x 4 sleepers aligned w rafters provide.

The steels or rsj s rolled steel joists are often built into one or both walls to give added stability to the roof structure. Of course the best designed flat roof has the correct amount of pitch to drain the water off naturally. Hand driven and pneumatic fasteners were included in the test program. The major difference between the warm flat roof and the cold flat roof has to do with the air flow between the roofing timbers known as joists that help to hold up the roof.