[treedoc1]

http://www.conservationtechnology.com/



They are always helpful

[4seasons]

I helped on a roofing crew once and they installed flat roofs. They would use rubber for that, and go thru a 2-3 step process of gluing them together.

[Bill Schwab]

If you use P.E. materials al you need to do is heat both sides to 475-500° and touch them together fpor a few seconds. The fusion is better than the original casting. Same process as when we install a P.E. gas line for a BBQ.

[dan deutekom]

Joining EPDM liner is an easy process using cleaner/primer and a special tape. The secret is to take your time and make sure things are clean dry and well pressed together. The Firestone site give excellent directions for the installation of large liners .

[Stonehenge]

I believe that Aquaweve looks like the picture below close up (notice how it is in fact woven). If it is, I spoke with that mfg last year when looking at options for our big water feature. Because we were using big stones to be laid over this liner (which was 20 mil), the mfg didn't think their liner was going to be a good choice for this application and steered me away from their product. I guess it tends to be stiffer, and can tear easier than 45 mil EPDM. I know the stuff pictured below was a lot stiffer than EPDM - at the same time I can't imagine trying to unfurl 15,000 pounds of rubber.

But they were confident in it being able to stand up well to large applications that did not use large stones on top of it.

[Mark Oomkes]

Thanks for all the help. I will look at the websites when I have some time, I have a seminar today.

Thanks for not commenting on my ignorance of pond liners as well.

I know I don't want to worry about any little thing tearing it and causing leaks. This pond will be filled by municipal water, so I hihgly doubt that they want to replace any more than evaporation. So thicker is better. Sounds like the gluing\welding isn't as big of a deal as I thought, I will look into that as well.

Regarding the 20 mil liner, obviously the cost would be double, but what about doubling up 2-20 mil liners?

Good, bad, stupid idea?

Any more info on the bentonite clay liners?

Thanks again, I'll keep you informed and will probably have 1 or 100 more questions.

[Stonehenge]

I'm not sure if doubling up the liners is the best solution - if you have a leak in liner #1, there's a whole lot of money down the drain. Not to mention, the water leaking through liner #1 will push it up, causing big bubbles in it - it'll look weird as anything.

Dan - maybe you know of some tricks that I don't - I've always had a hard time putting pieces of 45 mil EPDM together once they got to a certain size, unless we were seaming them on perfectly flat pavement.

[dan deutekom]

I do it by working with 2 of us to move the liner and tape etc. and I use a piece of 3/4" plywood that is about 2' wide by 4' long with some rope tied to the end to pull along under the liner splice so that I have a solid flat surface to work on in the splice area. Firestone has an excellent installation guide for all aspects of this material including how to place, where to have seams, how to seam, how to secure liner concrete structures, how to handle pipe intrusions and how to handle inside and outside corners on square water features. Check out the pdf manual at http://www.firestonebpe.com/lining/t...m%20Instal.pdf