Drip Edges In The IRC

globe trekker said:

jar (and others),Let me ask it a different way then.

Suppose the manufacturer of the asphalt shingles do not require their shingles to

extend out over the edge, or the roofer does not extend the shingles out over the

edge, is there a code section that states a "drip edge" would then be required,

..not as a customary practice, but an actual code requirement?

Thanks!

.

Click to expand...

I hear you and I am with you. In our area ice and water shield is required. I have witnessed contractors wrapping the ice and water around the hang over to the front of the facia for added protection. This may be an option but it directs the water BEHIND the facia, directly onto the wood. Extending shingles is the answer and the manufacturers that I am aware of, all require it when not using drip edge so in essence, the manufacturers are keeping a code requirement at bay because it is already done. I have seen installations where the drip edge was missing and there was no overhanging of the shingles. The edges of the plywood acted like a wick and started to delaminate and rot in that area. This is just not an issue in our area so I am not seeing the immediate need for a code change. We always refer to the manufacturers installation instructions which covers this anyway.

Not all roof coverings require drip edge anyway.

I hear you and I am with you. In our area ice and water shield is required. I have witnessed contractors wrapping the ice and water around the hang over to the front of the facia for added protection. This may be an option but it directs the water BEHIND the facia, directly onto the wood. Extending shingles is the answer and the manufacturers that I am aware of, all require it when not using drip edge so in essence, the manufacturers are keeping a code requirement at bay because it is already done. I have seen installations where the drip edge was missing and there was no overhanging of the shingles. The edges of the plywood acted like a wick and started to delaminate and rot in that area. This is just not an issue in our area so I am not seeing the immediate need for a code change. We always refer to the manufacturers installation instructions which covers this anyway.Not all roof coverings require drip edge anyway.