Roofs Without A Continuous Eave

The total venting space should equal 1 150 of the floor space.

Roofs without a continuous eave.

An unvented roof assembly is possible only if you keep the roof sheathing warm enough to prevent conditioned air from condensing against it. On the other end of the eave there ll be excess tarp hanging off the eaves which you can trim if you like. Sometimes a home without eaves or soffits will use ridge vents. Over the roofing paper felt along the eave edge over the roofing paper felt along the rake edge.

A typical metal roof overhang may be 2 to 4 inches or even less. There are many such vents on the market and they re available at most lumber stores. Techni flo iv intake vent creates airflow for roofs without an eave. These fixed venting units have a lot of advantages over the other venting options.

One advantage is that they re incredibly efficient. However you ll want to have ample material to nail the tarp to another 2 by 4 and roll it up around the wood. The map at right which is based on table r806 4 of the irc lists the minimum r values required to prevent condensation in unvented assemblies in various climate zones. Gutters should be installed by screwing or spiking them.

Most metal roofing is installed with little or no overhang either on eaves or gable edges because it tends to bend under heavy weights. The efficient design and easy installation of the eave vent translate into cost savings from lower labor costs and decreased heating and cooling costs. Over the roofing paper felt along the rake edge. So as aedi says treat the walls like a steep extension of the roof and it could work.

Techni flo ev vented eave fascia is a one of a kind design that creates airflow to the eave. Venting drip edge basically combines continuous soffit vent with an extended drip edge. An a frame building is a roof without eaves. Be sure to leave enough slack to attach this side to the house just under the eave for a snug fit.

A passive ventilation system should have air inlets at the base of the roof usually in the soffits and outlets in the peak or gables.