Like Archinect on Facebook.
Sign up to our mailing list.
Is Caulk all that separates us from the elements?
It seems the more details I look at the more caulk there is in there.
And maybe it should be sealant.
6-8" of huge precast wall panels...oh and a caulk joint in between.
3" insulated panels with intricate t&g seams with caulk everywhere.
Drywall inside corners - caulked.
Storefront windows... lined with caulk.
At $10-$35 a cartridge, Dow or Tremco might be a good investment.
Maybe it is a miracle material. Any thoughts?
Not to be confused with caulk and balls.
Drywall to separate us from the elements? LOL
Except for glazing, if it leaks without caulk it's a shitty detail.
"Except for glazing, if it leaks without caulk it's a shitty detail."
Amen, brother. Friends don't let friends design face-sealed building assemblies.
i don't think you're going to stick 2 precast or tilt panels together in a weathertight manner without caulk. unless you count the foam backer rod as a proper sealant.
Rainscreen systems don't rely on caulk, yes?
Donna... depends. I've found myself adding notes on rain-screen details specifically asking for no caulking/sealant. It appears it is common practice that some guy with a caulk-gun runs around everywhere filling every hole after construction.
Gwharton, not sure how it is everywhere, but I know our insurances won't cover us in case we design face-sealed assemblies.
i believe the correct term is sealant. what say you, spec writers?
This was in the ACSA journal not too long ago:
you could do that donna. i was thinking more along the lines of double-Ts (though i don't think i've ever seen new double-T construction; that was before my day), or buildings where the tilt panel is the finished exterior face, and sometimes also the finished interior face in the case of warehouse or manufacturing. there seems to be a lot of somewhat new stuff to stick to the face of tilt these days too.
vado, i thought the spec writer term was 'goo.' i guess that's why i'm not a spec writer. sometimes.
In the field it's called 'schmutz' as in, "Better put some schmutz in that joint."
I hate getting caulk blocked.
Just don't forget the "Backer Rod"
Sometimes you'll be on a jobsite and see some really messy joints -- and you'll want to fix them yourself. But you can't just indiscriminately use your tool on another guy's caulk.
form follows caulking... or is it... caulking follows function?
Caulk is often used as a backup, which is fine and good practice. But many times I see problems because the caulking was done in such a way that it didn't let water OUT. Weepage is critical - one of the ways to keep water from getting in is making sure it has a way to get out.
It's "Caulking Follows Litigation" jla-x
i believe the correct term is sealant. what say you, spec writers?
Short answer: Yes, it's sealant.
Long answer: Years ago, sealants didn't exist. Caulk was the term from the ship-building industry to describe any oil-based joint filling material. As long as the joint didn't need to deal with any movement, it worked fairly well to keep water on the outside of both ships and buildings.
With the introduction of different building systems that required joints that were able to handle movement the joint fillers needed to respond, and modern sealants were derived.
I've heard the term "caulk" in modern building refers to acrylic-latex sealants. The standard for those sealants, ASTM C 834, does not require testing for movement capability. In other words non-elastomeric.
MasterSpec makes the distinction that there are sealants classified as elastomeric, with base polymers of silicone, urethane, or polysulfide. Latex, solvent-release-curing, and preformed sealants are not classified as elastomeric.
I've also seen reference to the publication Sealants: The Professionals' Guide, from the Sealant, Waterproofing & Restoration Institute, that has the following definitions, but I don't have a copy to verify:
However, MasterSpec and the ASTM standards still refer these products as "sealants" regardless of their elastomeric properties. And since that's primarily the source we use for specifying the products used in building these modern buildings held together by "goo," I still say the long answer is: Yes, it's sealant.
Quite the caulk aficionado Brian...Opps i mean sealant.
everybody is talking about their caulks
Brian Henry that post is dreamy. I love that level of specificity, no pun intended.
You can talk the talk, but can you caulk the caulk?
So, a relevant question: I have a 1970's Modern building with large (3'x5') limestone panel cladding. Panels are 4" deep. They are caulked between panels, a +/-1" joint. Set within the wall are cast stone window surrounds that are mortared at joints with adjacent limestone panels.
So we're having water infiltration in the wall, and you can see where the caulk has (over 40 years) deteriorated, cracking and pulling away from the panels edge. In addition, we're severely under-insulated, with only a 1" cavity space. Do I call in a masonry contractor, or an envelope specialist?
You are the envelope specialist. I'd start with a couple of masonry contractors and see what they say.
How far are you going - repair or rehab? Funny how many modern buildings have such short life spans.
Yeah, that's what I'm thinking, Miles. I am indeed the envelope specialist. How far we go will depend on how deep the pockets of our donors, bless them, are able to be.
i have a theory. about 100 years ago, buildings were made to last maybe 105 years.
about 60 years ago, buildings were built to last about 65 years.
20 years ago, buildings were built to last 25 years.
today, buildings are glued together with goo.
Today's goos are much better Donna. Call a sealant specialist and a Dow tech guy to reseal w the right Dow silicone. PM me and I'll see if I can remember the name of the sealant specialist. 1" joint will have also at least 1" of movement (potentially) so you need a sealant w at least 70% +\- movement capacity. Look at dows movement recs. I also have a calculator to share w you.
Most of the new development here - $5-10m spec houses - requires major maintenance and repair within 3-5 years. If it wasn't far caulk they probably wouldn't last that long.
Miles, I know we've had this conversation before, but no kidding, that house in NJ that I'm working on - same deal, built 2005, now complete renovation, some because of poor execution and just not finished..
A friend takes care of a bunch of houses. The latest is a 4-year-old $15m spec turd that has one problem after another: leaks, flooding, frozen pipes, etc. One day the owner said to my friend, "I wish I'd never bought this house." The PoS sat for three years unsold and the idiot thought he stole it for $15m. Buyer's remorse?
LOL, and more evidence that rich people are stupid in direct proportion to their wealth.
Caulk on the inside, sealant on the outside.
And Brian won the thread.
Modern buildings are pretty crappy, but many historic buildings I've been in are even leakier.
i've never been there, but i heard the pantheon leaks.
"Most of the new development here - $5-10m spec houses..."
Yeah, totally the same in my neighborhood... wait, what?
two words. drainage and flashing
Are you sure you want to block this user and hide all related comments throughout the site?