Running Conduit Through Roof

Running a vent pipe out of the roof takes some careful preparation.

Running conduit through roof.

Rigid conduit with an outside diameter of 3 4 in and a fish tape long enough to reach through the buried pipe. Mounting conduit on existing flat roof any time you see a thin black line to the left of a paragraph in the nec it means that it s new or the wording has changed. Either rigid or flexible conduit protects the wires and is used in exposed locations such as along the exterior surface of a wall. By way of comparison the wall thick ness of 1 2 inch thick metallic conduit is comparable to the metal thickness of a 20 gauge steel roof deck.

Also cutting and roof system removal. A note on conduit. Seanb 1 don t forget the coil of cable and add a few ferrite toroids over the cable as well. Self cutting or self drilling roof fasten ers can readily penetrate metals of these thicknesses.

Occasionally due to attic configuration or other challenges some visible conduit is unavoidable. Electrical conduit is metal or plastic pipe through which electrical wires are run. We have literally hundreds of good photos. These hangers hold the conduit off the wall so it can run straight into boxes with no offset.

Running conduit through roof reply 5 on. August 02 2011 09 56 26 am author. Although looking at it now the 2008 uses shaded sections for new or modified wording so the thin line might just be for new. To run the wires inside rigid conduit you ll need a hacksaw a pipe bender capable of bending 1 2 in.

Remove the conduit center the strap between the marks and attach it with a screw. When water drains air must replace the space that was taken up by the water. Vent pipes provide this air by running outside the structure of the house. Check out our website photo gallery if you want to see more.

It is also used in unfinished areas like basements crawlspaces and attics and for surface mounted installations outdoors. Running wires inside rigid conduit. Lic conduit embedded within or directly underneath roof assemblies. If the vent pipe isn t installed properly the roof may leak through or around the pipe penetration leading to costly repairs.