How Do You Keep Your Forms From Sticking To The Concrete? - Concrete, Stone & Masonry - Page 2 - DIY Chatroom Home Improvement Forum
Advertisement


Go Back   DIY Chatroom Home Improvement Forum > Home Improvement > Concrete, Stone & Masonry


CLICK HERE AND JOIN OUR COMMUNITY TODAY...IT'S FREE!

Like Tree1Likes
Reply
 
Thread Tools Display Modes
Old 10-15-2012, 03:50 PM   #16
Member
 
Join Date: Mar 2010
Posts: 375
Rewards Points: 264
Default


Quote:
Originally Posted by jomama45 View Post
I told you a number of times two different ways to do it, and I'm not simply guessing at it either. I've built a number of waterproof concrete assemblies through the years, including many septic tanks, and can tell you that the joint between the two pours is almost guaranteed to leak..............
Are you talking about using 'water stop'? I didn't know what that was, was hoping the waterproofer I was planning on using would keep the joint from leaking.

Can you better explain what your saying to do? Are you talking about using this on the foundation before I pour the walls? http://buildingmaterials.cetco.com/L...2/Default.aspx

Advertisement

tibberous is offline   Reply With Quote
Old 10-15-2012, 03:56 PM   #17
Member
 
Join Date: Mar 2010
Posts: 375
Rewards Points: 264
Default


Btw, this is what I was planning on using to waterproof the tank:

http://www.thehardwarecity.com/produ...int-5g/0003507
tibberous is offline   Reply With Quote
Old 10-15-2012, 04:37 PM   #18
Concrete & Masonry
 
Join Date: Nov 2008
Location: Wisconsin
Posts: 3,364
Rewards Points: 388
Default


The first link is what we refer to as "voclay" and will work, but you need the adhesive to glue it down, or you can nail it down.

AN easier option would be to look into "Sikaswell S-2", but I think it only comes in a "sausage" tube and you'd need a bulk gun to put it on.

I actually meant a pvc ribbed waterstop (search for WR Meadows waterstop) when I used that term. This would be poured right into the slab and extend into the walls, but ideally, it should be seemed together, or at least try to glue it........

The second link is nothing more than a band-aid IMO, and will need to be re-coated every few years. You could use a far superior product once, for a fraction of the price, and have far better results IMO, but you're still going to have to hope that the concrete itself doesn't leak through, which is why I offered the other, foolproof method: encapsilating the entire thing in a rubber membrane.........
jomama45 is offline   Reply With Quote
Old 10-15-2012, 04:39 PM   #19
Bombastic Idiot
 
notmrjohn's Avatar
 
Join Date: Aug 2012
Location: Mesquite, Texas
Posts: 761
Rewards Points: 500
Default


You need rebar, and unless you can do it all in one pour or shoot gunite, jomama and concretemasonry are gonna say, "Told ya so" 450 gallons of water weighs almost two tons. All that weight is going to be pushing down and out. The deeper the tank of same size the more pressure at the bottom sides.

If you got to Farm and Ranch Supply Store or online, you can find a 4'X8'X2' deep stock tank that holds around 470 gallons. Various sizes; shapes, round, oblong, eliptical; materials, metal, plastic, resin, fiberglass are available. Pillows, or giant water bags, are available at military surplus outlets.
__________________
Measure twice, cut once.
Look at the nail, not the hammer. Watch the fence, not the blade.
If you hook your thumb over your belt you won't hit it with the hammer or leave it layin on the saw table.
notmrjohn is offline   Reply With Quote
Old 09-05-2016, 04:41 PM   #20
Newbie
 
Join Date: Sep 2016
Posts: 1
Rewards Points: 2
Default

Re: How do you keep your forms from sticking to the concrete?


Quote:
Originally Posted by tibberous View Post
Is there any prep you need to do to plywood forms, or do they just pry off when your done? I plan on coating the concrete with a sealer after, so I don't want to use anything that would mess up the adhesion.
Line the mould with Tyvek Sheet. It doesn't stick to concrete. You can use tape on the exterior of the Tyvek to craft a liner that is the right size, then slip it into the mould. I used that inside of a plywood box mould I had made to make a concrete block into which I inserted a PVC (belled-end) pipe to make a home-made patio umbrella stand.
tvwamiyn is offline   Reply With Quote
Old 09-05-2016, 05:37 PM   #21
Member
 
joed's Avatar
 
Join Date: Mar 2005
Location: Welland, Ontario
Posts: 11,634
Rewards Points: 10,060
Blog Entries: 11
Default

Re: How do you keep your forms from sticking to the concrete?


Four year old post. I hope the job is done by now.
Msradell likes this.
joed is online now   Reply With Quote
Old 09-05-2016, 05:48 PM   #22
Ole Wood Worker

 
BigJim's Avatar
 
Join Date: Sep 2008
Location: Chattanooga, Tennessee
Posts: 10,089
Rewards Points: 36
Blog Entries: 1
Default

Re: How do you keep your forms from sticking to the concrete?


Quote:
Originally Posted by tvwamiyn View Post
Line the mould with Tyvek Sheet. It doesn't stick to concrete. You can use tape on the exterior of the Tyvek to craft a liner that is the right size, then slip it into the mould. I used that inside of a plywood box mould I had made to make a concrete block into which I inserted a PVC (belled-end) pipe to make a home-made patio umbrella stand.
While this is an older thread, that is a good tip, thanks.

Advertisement

__________________
New members: Please consider adding your location to your profile.

He is no fool who gives what he cannot keep, to gain what he cannot lose.

http://www.woodworkingtalk.com/forum.php

Jim
BigJim is online now   Reply With Quote
Reply


Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
vibrating concrete externally via the forms DIY1 Concrete, Stone & Masonry 13 07-01-2012 11:12 AM
Sidewalk Concrete Forms next to house jimsi Concrete, Stone & Masonry 2 05-25-2012 10:30 AM
Concrete forms tickifrog46 Building & Construction 2 10-07-2011 10:10 AM
Repairing concrete slab in shower JohnRoss Building & Construction 0 08-08-2011 01:20 PM
Should concrete driveway slab be thinner on the edge by the forms? Studly Building & Construction 6 09-14-2009 09:24 AM




Top of Page | View New Posts

 

Search Engine Friendly URLs by vBSEO 3.6.1