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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 Comments
Don Dewitt · September 19, 2014 at 3:52 PM
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.
James Magee · September 19, 2014 at 4:29 PM
he does more math problems than woodworking lol
MrTeknotronic · September 19, 2014 at 4:57 PM
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…
Ian Kjos · September 19, 2014 at 5:54 PM
What if you soap the threads?
CEMSTR3RK · September 19, 2014 at 5:58 PM
What if you tested the threads by putting washers on the head of the screw
and keep going until the threads rip out
Harry Paul Garcia · September 19, 2014 at 6:28 PM
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?
Crystal Machine · September 19, 2014 at 6:35 PM
How long would drywall screws last in a treated wood fence?
Can you do an experiment for us ?
Marc Gorski · September 19, 2014 at 7:03 PM
Dry wall screw bitches
Frank Watson · September 19, 2014 at 7:43 PM
Didn’t take him long to look at that broke head xD
Jim Koz · September 19, 2014 at 8:32 PM
Rub the screw on a bar of soap helps screw it into hard wood easy
DJCRooK3D · September 19, 2014 at 9:19 PM
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.
aqwood · September 19, 2014 at 10:17 PM
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.
Kale Klompstra · September 19, 2014 at 11:03 PM
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.
seephor · September 19, 2014 at 11:26 PM
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.
Jeff Stanley · September 20, 2014 at 12:25 AM
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.
iambism · September 20, 2014 at 12:38 AM
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.
Crystal Machine · September 20, 2014 at 12:46 AM
Do these screws react to pressure treated wood?
waswestkan · September 20, 2014 at 1:44 AM
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.
Jim Koz · September 20, 2014 at 2:01 AM
The head is a lot stronger with a deck screw then a drywall screw. Good vid
Sam H · September 20, 2014 at 2:11 AM
Try dipping the screws in oil when screwing into hard wood..
sidgar1 · September 20, 2014 at 2:16 AM
Even Norm Abrams used drywall screws, in the episode where he made
sawhorses with tool trays.
Mickey Xtian · September 20, 2014 at 2:55 AM
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.
Superthing 77 · September 20, 2014 at 3:42 AM
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 .
GMDuramax · September 20, 2014 at 3:45 AM
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?
mieguistumas · September 20, 2014 at 3:52 AM
Loled, when you burned your fingers :D
Comments are closed.