Vented Roof Deck

We have installed a vented metal decking but the engineer has requested that solid metal decking be used.

Vented roof deck.

There are traditionally four main reasons for venting a roof. Vented metal deck we have installed a metal deck for a roof system on which the engineer has specified a lightweight concrete composite system. Removing moisture from roof cavities structural members sheathing and insulation. Controlling ice damming by keeping the roof cold.

Factory vent tabs this consists of an elongated slot 1 long in the bottom of the flute at 6 about wide pushed. What are the different types of metal deck venting. Available as a vented deck types bv bv dek and biv are manufactured with slot vents in the bottom flutes to be specified when venting is required for cementitious insulation fill. The drawback of venting deck is when concrete is poured the slurry drips through the vent tabs creating debris on the surface below.

Deck should not be specified as vented when it is not required. Factory side lap vented a roll formed bump at 10 on center on one side of the sheet when the flat edge of the next. Some materials in the roof assembly may require venting of the steel roof deck such as roof systems with light weight insulating concrete. Vent the roof deck if the attic space is going to be conditioned either for living or mechanical purposes or if a home design calls for a vaulted ceiling provision r806 3 in the international residential code calls for the roof deck above the space to be vented continuously from the eave to the ridge.