Tag Archives: weathering
Continued from Pool restoration pt3
The next step was the epoxy injection.
Basically this is a two part foam which needed to be injected into the cracks, where it would expand into there to fill any deep spaces and fill/prevent any leaks.
The way it works is you cover the surface with a surface seal epoxy, and attach injection ports every so often;
These are the places to inject the foam, so its important to block/seal the rest of the crack and be sure the foam will fill/flow inside.
Also interesting to note how the stale’s epoxy has changed color over the last week as it cured;
Lots of ports mounted, I did this for all the cracks in the pool surface as well as the split at the bondbeam;
Then I injected the foam itself,
I used three kits and did it in several passes,
The foam/epoxy made a big mess, but I think it got everywhere it needed to be (and then some)
This was in the middle of applications, as you can see the top near the bondbeam needed a bit of patching;
I also started doing some testing with hydraulic cement; patching over the exterior of minor cosmetic scratches, in gaps near the bond beam, and on exposed gunnite.
After the foam had cured for a week or so, I started removign the ports as well as the surface seal;, first pulling the ports and chipping away large chunks;
This is what I wore while doing that, feeling like a sci-fi character
Then hitting it with the grinder to knock back more of it, and leave a sort of ‘keystone’ shape and roughed up surface so that the plaster/cement over top the epoxy wouldn’t be able to pop/shear off.
It seems like everything near the pool has become covered in dust from the grinding, bit it was starting to look a lot better!
This took way longer than I expected/planned, I’ve now officially lost track of how many bucket loads of debris I’ve carried out of here
I knew better than to do too thick a coat of the hydraulic cement, its more there to provide a non-shrinking plug and seal, rather than structural strength, so I tried to keep it around 1/8 inch, and wet the surrounding area to prevent it drying unevenly
I couldn’t stand thinking of looking at the epoxy for another week, so I worked well into the night, patching and coating it with hydraulic cement.
Ended up using three buckets, about 30lbs of hydraulic cement
Its come a long way!
In case anyone is reading along for knowledge, I should re-state; I’m not a professional, I’m just learning as I go, and doing my research online as well as speaking to a few pool guys while gathering info/estimates…
So I’d left off I here;
Hydraulic cement patch/seal over the cracks and epoxy/foam. I figure the thinness of the cement will futther seep into the cracks and seal it more, and I made sure to leave a rough texture, so that the next layers would have something to grip.
Looking at the surface I started to notice a bit of discoloration;
A bit of a yellowish tint and some hairline cracking in there;
I knew the hydraulic cement wouldn’t be structural, but this isn’t right, and as soon as I started tapping it with the mallet/chisel I could see what was happening as it sheared off and crumbled;
I’ve never heard of this happening before, but the yellow seemed to be oils leached out of the sealing epoxy, which weakened the hydraulic cement, as well as the cement did not bond to the leftover epoxy much at all, so I set about knocking off all the problem spots to grind down the epoxy even more.
Very discouraging, but I kept at it, removing the bad material and going back down to get the surface epoxy off too. Very discouraging, but I keep telling myself, its better to go through this now then later when its filled with water…
Next I repacked it with a portland/sand mix, which should prove to be a lot stronger, and with the epoxy residue ground away it should provide a much stronger patch;
I left the texture pretty rough so the replaster would have something to grip.
Already feeling a bit better about this, and the portland/sand mix is pretty close to what I’ve been thinking of plastering the whole pool with, so I can see how dark it would end up being, also note the root that’d been hiding under the old deck, no wonder this was beginning to crack!;
Continued from Pool restoration pt2
Now that the plaster was clean, the weak parts removed and cracks exposed I was ready to deal with them. I ordered a few different kits of materials; staples and epoxy.
I went with two kinds of staples, basically to reinforce the areas that I was worried may be weak and eventually crack again.
Carbon fiber from Leaktools
Steel from Torquelock – these ones interest me the most since they are engineered to apply pressure to the crack in addition to holding it.
I planned these out where I thought they could do the most good;
Masonry cutting disks in my angle grinder worked well for the countersink, but after drilling for a solid day and having my hands go numb I realized why a regular drill even with a good masonry bit is not the best way,
So I ran to Harbor freight and picked up a rotary hammer drill, which was AMAZING, so much better! Made the rest of the drilling a breeze in comparison. It was like the difference between when I was chiseling by hand vs when I got the air chisel.
A lot of staples… just cutting, drilling, and plotting them all out first;
Might have been overkill for some places, but figured its better that way, than not doing a spot and having that be where it re-cracks;
The staples were set with a special epoxy;
Starting with all the carbon fiber ones;
Then the steel ones, the epoxy is harder to see since its just on the inside, but it was applied to the posts and face surface, then pressed into place. After that I twisted the cam to apply more pressure by drawing the posts closer together;
Continued from (http://bradisdrab.wordpress.com/2014/07/29/pool-restoration-pt1/)
Once we got the old tiles knocked off and a couple rounds of pressure washing in it was time to see hom much cleaner it’d get by acid etching the surface.
Here I’ve started the acid wash,
I was just doing it by hand, using a spray bottle and scrub-broom,
After acid washing the whole thing, and continuing to remove old/bad/delaminated plaster, basically anything that sounded hollow, was stained/softer than the rest;
When I bought my house back in March, I knew it was a foreclosed fixer-upper and there were a lot of things that had deteriorated after years of neglect, but I’m a sculptor at heart, have worked in construction before, and love getting my hands dirty.
Note the giant tree, which I suspect was the cause of the cracks;
That and years of bad chemestry had left the plaster in pretty bad shape, a lot of bad staining, and softened corroded areas, especially around the cracks. The areas of blue/green aren’t paint, it was just eaten from the old/bad chemestry I think. That discolored plaster was softer and crumbly.;
Sad to see such a cool old tree go, but there was no point to restoring the pool if the tree was just going to continue breaking it up.
I drained it, knocked out the old tiles, and got a better look at the damage. About half the coping had seperated from the bond beam, and some of the cracks went pretty deep, through the gunnite,
I’d come up with a plan to fix the cracks, but first I needed to finish preparing the rest.
( continued in part 2)