Testing drywall screws

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Doing some tests on the much malinged drywall screws. They are actually fairly decent wood screws. http://woodgears.ca/joint_strength/drywall_screws.html For…

25 responses on “Testing drywall screws

  1. Don Dewitt

    What is the purpose of comparing these different types of screws? If you
    were testing different types of wood screws or different types of
    sheet metal screws then that might make sense. You are comparing drywall
    screws which are used for drywall and decking screws which are used
    for building decks. Not sure what the point was to see if they would bend
    and at what point they break. This test makes absolutely no sense and at no
    point when building anything would you ever drive the screw in as far as
    you can. 

  2. MrTeknotronic

    i like drywall screws because of the course thread, they go in fast and
    tight without pilot holes. but i used to be able find these nice “gold”
    (not gold, but coated with something golden-ish colored) course thread
    screws at Home Depot that were just as good and snapped less. can’t seem to
    find them anymore, though. prefer those to drywall screws, but drywall
    screws are cheap and plentiful. critics be damned. if you’re truly worried
    about shear you don’t use screws to begin with anyway…

  3. CEMSTR3RK

    What if you tested the threads by putting washers on the head of the screw
    and keep going until the threads rip out

  4. Harry Paul Garcia

    I use a lot of pressure treated wood which has chemicals infused during the
    treatment. Atleast my legs of out door furniture is treated.
    I wonder if pressure treated wood affects the screws by corrosion or
    whatever?

  5. DJCRooK3D

    People used to criticise me for favouring drywall screws for a multitude of
    tasks too, and the only real problems I’ve experienced is the heads
    shearing off too.

  6. aqwood

    Great video. A kind of solution to the heads of the screws sinking into the
    wood is to drive the screw in with no pre-drilling. That way the threads
    hold on both pieces. This kind of joint takes a lot of force to get fully
    apart, but, as you know, it’s not suitable for everything.

  7. Kale Klompstra

    Huge fan of your videos. I believe the issue with drywall screws is the
    brittleness. 99% of the time drywall screws are fine, they just wont have
    the sheer strength of a softer screw. Or all screws vs. nails for that
    matter.

    Since your not patching up joists, i wouldnt worry about it too much.

  8. seephor

    The problem I’ve had with drywall screws is the head will easily snap if
    you try to drive them into hard woods. Sometimes they snap driving them
    into 2×4 studs for drywall depending on if you hit a hard spot on the
    stud.. I always use star bit deck screws and have not had any issues.

  9. Jeff Stanley

    I use drywall screws only when the forces acting on the joined parts are in
    a vertical plane and there is no shear force involved. I also never use
    Phillips head screws of any kind when there is an alternative. I like
    square drive and torx/spider with no preference between the two. Great
    video and I really like comparisons like this.

  10. iambism

    The objection I’ve heard to drywall screws is that their sheer strength is
    not good enough for building construction. Your breaking test demonstrated
    that the deck screws have superior sheer strength. I know from experience
    it is a lot harder to break the head off of a deck screw compared to a
    drywall screw and the shaft on a deck screw is visibly larger. For
    furniture and small projects I think drywall screws are fine and I agree
    for some things they are superior. I’ve never like wood screws, I’m glad
    there is some scientific basis for my bias, thanks Matthias. 

  11. waswestkan

    Matthias; In my experience drywall screws can’t handle a heavy load or
    absorb. I live in torsndo ally wher a recommendation in get under sturdy
    furniture. I built a radio station bench using a solid core door for the
    top and framing lumber for the rest, using drywall screws. I thought t
    should be sturdy enough, but when a tornado did come the dry wall screws
    failed. Glad I wasn’t under it. 😉 Other failures of drywall scres, have
    me limit where I’ll use them for uses other than installing drywall. There
    than stating my distrust in drywall screws I never say too much about their
    use. Thanks for taking the time you do to make your videos.

  12. Mickey Xtian

    My biggest complaint with drywall type screws is the sizes or lengths. The
    stock lengths are either too short or too long. For instance, lets say you
    are screwing two 2 by 4s together, broad side to broad side, the length of
    screw you would need to get the best bite into the wood would be a 2 and
    3/4 inch long screw. your choices are a two and 1/2 or a 3 inch. the two
    and a half doesn’t screw in far enough. And the three inch protrudes out
    the other side.

  13. Superthing 77

    Good test .
    Have you tried using a washers under the screw heads .
    Then see what happens.
    Thet then should determine which screw has the best threads .

  14. GMDuramax

    The way I see it is, everything has a purpose. I mean of course, if you are
    on the go and really don’t care. Pick up whatever screw you like. But doing
    things right, I usually do this. Drywall screws always stay indoors.
    Drywall screws don’t have a coating to protect from rusting. Indoors is
    just fine, take it out, and you will see in a few months, they will
    corrode. Fine thread for metal and coarse thread for wood. Then you have
    exterior screws that are coated or galvanized and are to be used outdoors.
    They last a long time outside and are meant to be out there. The pulling
    force is not the concern, it’s after year 5, are those drywall screws going
    to hold up in a windstorm or not?