H Clip On Roof Sheathing Over Skip Decking

Zip system roof assembly combines our revolutionary integrated sheathing and flashing tape or liquid flashing to provide a sealed roof for protection against moisture intrusion during construction or if high winds strip the roof covering away.

H clip on roof sheathing over skip decking.

Some older h clips do not provide a built in gap. H clips provide additional stiffness between bearing points for the unsupported edges of wood panel plywood or osb roof sheathing along with the necessary 1 8 gap for expansion as shown below illustrated on a bag of simpson h clips. The lumberyard told us to install h clips as for conventional sheathing but after taping over all the seams between panels we found that water leaked through the tape at almost every clip. Help prevent sheathing warping our clips leave a precise 1 8 gap created from a full width spacer bar without this full gap sheathing can expand under moist conditions and you can end up with the sheathing.

Help prevent roof leaks many tile roofs have a polymer underlayment our clips work very well with the polymer underlayment. When a cedar shake roof needs replacing the shakes should be removed and the skip sheathing sheeted over with solid plywood. We recently installed a zip system roof over roof trusses spaced 24 inches on center. Simpson strong tie panel sheathing clips are used to brace unsupported sheathing edges and provide a 1 8 gap to address shrinkage and expansion of roof sheathing.

The house has 24 oc trusses with 3 8 plywood and h clips. Not always required but a good idea. I don t know how they handled the h clips but we never went over the original sheathing we stripped it and started with new plywood. Skip sheathing for shake roofs used to be really common around my area of the country and i ve never removed it or seen anybody else remove it for that matter.

Some other clips can poke holes in it and cause leaks. When you think of a modern plywood roof deck you re not imagining gaps between the sheets of plywood. The crew stripped the roof and nailed a second layer of 1 2 plywood over top of the 3 8 existing layer. The entire roof deck is relatively uniform where you can step on any part of it without.