Ice and Water Shield: Does a Metal Roof Need It?
LESLIE: Well, it’s time to talk roofing with Janie in Tennessee. What can we do for you?
JANIE: Yes, the other day I heard your show and you said that you have a snow and ice shield. You recommended a snow and ice shield for your shingled roof.
JANIE: This spring I had a – I didn’t know there was such a thing; so, this spring, I had a metal roof put on. I was wondering if I still need that with a metal roof.
TOM: No. You’re talking about not snow and ice; you’re talking about ice and water shield.
JANIE: Yes. OK, that’s correct.
TOM: Ice and water shield goes under, typically, asphalt shingles along the roof edge – the first three-foot edge of the roof – and it does two things: it stops ice dams, which can freeze at the edge and build up and leak under the shingles …
JANIE: Which happened to me one year.
TOM: Yes. And also, in southern climates it’s put on the entire roof because even if the shingles blow off it keeps the water out; hence it’s name is ice and water shield.
If you have a metal roof, you generally don’t have that problem because even if you do get ice, it’s going to build up at the edge. There’s no shingle to lift up and for the water to push under, so I think you’re good to go on that.
JANIE: Thank you very much. And by the way, I listen to you every Saturday.
TOM: OK, well thank you very much. I’m glad you enjoy the show and thanks again for calling us at 1-888-MONEY-PIT.