Reuben's Home Inspection Blog

Problems With Stapled Shingles

November 29th, 2011 | 10 comments

Wind damaged shingleWhile it used to be common practice to use staples to attach asphalt shingles to a roof, this has been a prohibited method of attachment in Minnesota since 2003.  Today, staples are considered an inferior method of attaching shingles to a roof, but it’s easy to understand why roofers like staples.

  • Staple guns are smaller and better balanced.  Coil nail guns are literally fed with a coil of nails, and the holder for the nails makes the gun much bulkier.
  • Staples are far less prone to jamming up in a gun than nails.
  • Staples cost less money.
  • Staples are much more compact; a roofer can hold a bunch of sticks of staples in their pocket and reload their gun very quickly.  Nail coils take up a lot more space, they take more time to reload, and they need to be treated carefully; if a coil of nails gets dropped or stepped on, it deforms the coil and makes it much more prone to jamming in the gun.
Staples vs nails

Staples are used because they make the roofer’s job easier; they don’t equate to a better installation.

The problem with stapled shingles is that they have a much greater chance of coming loose or blowing off the roof because staples are so easy to install improperly.  When a roofer holds a staple gun and fastens a shingle, the staples will have a tendency to be driven at an improper angle.

Staples are often improperly installed because it’s somewhat awkward to hold a staple gun completely perpendicular to the shingle.  For someone who is right handed, it’s much easier to shoot the staples on the left side of their body at an angle similar to a forward slash, and the staples on the right side at an angle similar to a backward slash.  The two super-crude diagrams below should help to illustrate what I’m talking about.

Crude Staple Diagram

When staples are installed properly, they work fine, but they’re just too easy to install wrong.  This issue doesn’t happen with nails, because they have a round head; as long as a nail is driven in to a shingle straight, it doesn’t matter which way the nail gun is turned.  To know if a roof has been installed with staples, you can sometimes see the outline of the staples pushing through the shingle above.

Roof staples covered   Roof staples exposed

Also notice, these staples aren’t perpendicular to the shingle.  This is the installation problem that typically happens with staples.

If you have a roof that’s been installed with staples, is it a defective installation?  If it was installed after 2003, technically yes, because staples aren’t allowed any more.  If every staple was perfectly installed, the installation would work just as well as perfectly installed nails, but I’ve found improperly installed staples at every stapled roof I’ve inspected.   If you have a roof with stapled shingles, you don’t need to replace the shingles as a rule of thumb, but you’re taking on some risk.  If shingles start blowing off on a regular basis, you’ll probably want to have the roof covering replaced.  This will be less costly and less of a hassle in the long run than having to deal with constant roof repairs.

When I inspect a house with shingles that have been improperly installed, I tell the same thing to my buyers; the shingles don’t need to be replaced, but they might cause some headaches.  If shingles have already started coming loose and obvious repairs have been made, I typically recommend replacement of the roof covering.

P.S. – Special thanks to roof guru and fellow home inspector Mike Moser for always knowing the answer to any technical roofing question right off the top of his head.

Reuben Saltzman, Structure Tech Home Inspections - EmailMinnesota Home Inspections

        

10 responses to “Problems With Stapled Shingles”

  1. Hank Spinnler
    November 29, 2011, 12:34 pm

    As always, an informative post to benefit home buyers, owners, Realtors or inspectors.

  2. Reuben Saltzman
    November 30, 2011, 5:04 am

    Thanks Hank! Will you be at InspectionWorld this year?

  3. Ted LeCroy
    November 20, 2012, 12:50 pm

    I am getting ready to roof my beach house 1 mile from Ocean. I was going to roof over top the old roof and was going to by a staple gun and use staples until I read your article. I know I’ll just be hurrying and doing it wrong. So, I’ll try and lease a roofers nail gun.
    I can do this myself . Only big issue is the skylites. and the fact should I just cover sky light with new ones and just coat sky lights and then roof around .
    tks tl

  4. Reuben Saltzman
    November 20, 2012, 6:10 pm

    Ted – sorry, but I don’t quite understand what you’re asking.

  5. BEVERLY
    December 4, 2012, 12:11 pm

    WHAT HAPPENS IF THE CONTRACTOR WHO IS ROOFING IS NOT LICENSED AND HE HAS FINISHED THE JOB. (FOUND OUT LAE-FRIEND OF FAMIL) DID THE JOB/PAID BY INSURANCE-HURRICANE SANDY DAMAGED IT.

    IGNORANCE

  6. Reuben Saltzman
    December 4, 2012, 1:39 pm

    BEVERLY – probably nothing.

  7. natalie gunn
    August 28, 2013, 12:11 pm

    what is a good 3 tab shingle to get . i don’t want less then a 25 year shingle, also what brand is very good.
    location is sourthern oregon winters are rainny temp avg most of the time 30 – 50′s, sometimes in the teens little snow and summers are hot (80-100′s) and dry
    thanks natalie

  8. natalie n
    August 28, 2013, 12:17 pm

    btw we can get high winds from 40 mile and sometime but is rare 70 mile per hour winds

  9. natalie n
    August 28, 2013, 12:18 pm

    what is the best brand shingle to get 25 year min

  10. Reuben Saltzman
    August 29, 2013, 4:08 am

    Hi Natalie,

    I recommend you ask a roofer in your area or check Consumer Reports – http://www.consumerreports.org/cro/roofing.htm

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