GBA Logo horizontal Facebook LinkedIn Email Pinterest Twitter X Instagram YouTube Icon Navigation Search Icon Main Search Icon Video Play Icon Plus Icon Minus Icon Picture icon Hamburger Icon Close Icon Sorted

Community and Q&A

First row of shingles removed and replaced during installation

wood0619 | Posted in Expert Exchange Q&A on

The ice and water, and underlayment was installed (code here is 3′ beyond the finished wall). Everything LOOKED good. Then halfway finished with all shingles up the roof, I saw my contractor remove the first rows of shingles and replace them. When I asked him why his response was there was an issue with row alignment that needed to be fixed. He said he sealed the nail holes after I pressed him that ice and water would not re-seal an open hole, but only around a nail.

How concerned should I be? This is Minnesota.

Thank you,

GBA Prime

Join the leading community of building science experts

Become a GBA Prime member and get instant access to the latest developments in green building, research, and reports from the field.


  1. matty_bram | | #1

    If you are concerned I would ask someone else to investigate.

    Personally I would wait to see if anything happens and contact them again if it does...but they probably wouldn't be interested by then.

  2. walta100 | | #2

    Have ice dams been a problem in the past with this home?


  3. Expert Member
    Michael Maines | | #3

    It's unlikely that they actually individually sealed the holes, but I wouldn't worry. Self-adhering bituminous membranes are good but not perfect; they are a line of defense.

  4. wood0619 | | #4

    I do occasionally get an ice dam on the north side. When we get freeze/thaw temps combined with rains, it's almost impossible not to get some ice dams. But overall, I have excellent attic air sealing and insulation, so I have never had anything major or roof leaks due to ice damming.

    Maybe I could get the contractor to acknowledge that they had to make a fix during the installation, and if I have problems with that, they will make it right. But yea, it's one of those things where it's done, and it MAY never be a problem, but if it is it's a real pain. It negates most of the line of defense of the ice and water.

    1. Expert Member
      Michael Maines | | #5

      I wouldn't say that a few small holes in a 36" sheet "negates most of the line of defense." But if that's how you feel, you could peel up a few shingles and see for yourself whether they sealed the holes.

Log in or create an account to post an answer.


Recent Questions and Replies

  • |
  • |
  • |
  • |