Hi folks, Kirk here with Kirk giordano plastering. today answer question I did a video about a year
and a half ago and man I got a lot of response because I was showing hard steel child finish and
a lot of people emailed me and say well why would I do it if it cracks like an egg I didn't clarify
it very well that day two years ago we were tired plus uh I'm an applicator first and I'm narrate
or second I'm just learning how to explain things where everybody could understand show
you something okay you could see the the wall here this is a hard steel finish it's a to coach system
and I tell people when I do a to coach system we are going to get some hairline cracks if you ask
for a hard steel child finish and people will say why I'll explain it okay number one what we
just put this second coat on and see all these these are Darby lines what what I generally do
Darby the wall Chu and plumb and then once it's where I want it this walls open now it's it can
breathe let me show you another two more things guys alright if I take a hard rubber float and
I compress it we push it in now if that's not smooth like what they have but this was called
a hard rubber float finish and what that does that wall can still breathe or you take a green sponge
float now I'm going to hit all my joints anyway you see how this water that's going on it that
wall again can still breathe and if a wall can breathe it's less likely to hairline but what I
failed to say in that last video is getting my joints right here but what I fail to say is if
you do a two coat steel child finish on a wood wall what generally happens especially with new
construction is okay we're southwest you're the ho bay area we're southwest here now this wall its
existing plywood they the reason they did this is four they wanted to enlarge it in the door
so we have existing apply with this plywood has cured meaning a lot of jobs will go to and it has
brand new plywood and sometimes you can't even get a knife between the gaps where the plywood
is and what that means is that wall when the Sun beats down on it is going to expand okay so this
wall in particular the Sun is going to beat on this wall it's going to heat up the plywood and
if that plywood has moisture in it because it's green and most houses do it's going to expand
and when that expands just you can't see it when it expands it tends to put a hairline hairline
cracks in a to coach system the stucco won't crack by itself if we go over say brick cinder
block any kind of concrete and we steel child finish guess what it rarely cracks unless that
wall is moving but it rarely cracks here what I'm doing is now that I got my joints right I'm
hard I'm steel trowel finishing it meaning I'm pushing all the sand and it we're just
we're just giving it some lines like what they have here there's this pretty imperfect so okay
this means this wall cannot breathe anymore a bad thing it just can't breathe so it's just
wall the plywood or when the wall heats up it has a tendency to hairline but again it is not
the stucco that hair lawns hair lines on its own unless it's a brand new house and you put
that added weight such as 20 tons of stucco then it could hairline because the added weight is
pulling it down it's called the dead weight so I thought I'd explain that a little bit
better than I did last time because a lot of folks who were calling me saying Kirk why the
hell would anybody want to do a to code system on the house if it's gonna crack the stucco is
not cracking it's the plywood in there sometimes even the studs will twist I wanted to clear that
up guys because again stucco will not just crack on its own it's the plywood expanding which then
creates a hairline finish and another question everybody asked me I get about two emails per
week because of YouTube stuff I had a fella do a two coat system Santa Barbara on my house and
at airline that same thing when you do a Santa Barbara smooth mission finished your trialing it
down like therefore that wall can't breathe and if when when the wall expands in that plywood
does expand that's what creates the cracks in a Santa Barbara smooth mission finished that
is the number one finish for hairline crack they've got nothing to do with application
it's got more to do with the walls themselves expanding anyway I thought I'd point that out
because a lot of people have been calling me and I've been trying to type that in I thought he'll
why not just do a video show it anyway my name is Kirk I'm with Kirk Giordano plastering we're gonna
get busy and finish this hard steel ciao finish we thank you for watching and as usual we'll see
you guys on the next one once again folks we thank you for watching and I really enjoy all
your comments if you guys like this video please click the like button down below and also if you
enjoy what we do subscribe to our channel so we can keep making these videos for you my name is
Kirk and J we thank you for watching and from the entire Giordano family we'll see on the next one