Large Scale Central

Mountains out of molehills

I peeled this polyurethane foam off the walls of our garage pantry and am wondering if it’s worth building some mountains out of the stuff, which carves nicely, because it’s dense and not like styrofoam. My wife thinks I’m crazy (she’s prolly right) and says “You’ve got enough stuff to do.” But all that foam is calling, so I’m askin’ does it live or go in the trash?

If I decide to make some mountains, what do you do after you carve the basic shapes–like cliffs and stuff? Do you slop some goop on it? Paint it? It looks prettty porous by itself.

I’ve never actually tried it or see it done, but “heard” about someone who uses the stuff and makes “Molds” from aluminum foil. The stuff they used came in a can and was sprayed into the mold and expanded to fill it. Whether it works or not I don’t know, but it seemed to work for that guy.

As for painting it, acrylics would probably work.

Buy a can, try it out and see what happens…:wink:

Ken , that sounds like expanding foam , so beloved of tight fisted green brainwashed idiots to insulate their houses ; they don’t seem to be able to work out that the heat conservation will take a lifetime to recover the cost of doing it .

However .

I use the spray stuff for landscaping , it works quite well and I use it in conjunction with the packing foam that protects all the stuff I get through the post .

Talking of packing , you know the macaroni type expanded foam worms that shower out of your newly opened package and cling like sh…; anyway , I had a bright idea for making lightweight concrete for a removable tunnel top , I mixed the concrete as normal but bunged a load of poly worms in . This reduced the weight quite a bit and also meant using less cement and so on . A couple of old bike wheel spokes kept things rigid , but I found afterwards that even the spokes weren’t necessary .

The only drawback I found , well , you know how you always finish up with a good shovel full of concrete after you have made your masterpiece and decide to modify a bit of the adjacent landscape to save wasting it ? The large maggoty lumps of expanded foam tend to make that idea a bit lumpy .

Mike , Master Maker of Muddles

ps No , the maggotty lumps do not float to the surface . Unless your mixture is a bit runny I suppose.

Joe Rusz said:

I peeled this polyurethane foam off the walls of our garage pantry and am wondering if it’s worth building some mountains out of the stuff, which carves nicely, because it’s dense and not like styrofoam. My wife thinks I’m crazy (she’s prolly right) and says “You’ve got enough stuff to do.” But all that foam is calling, so I’m askin’ does it live or go in the trash?

If I decide to make some mountains, what do you do after you carve the basic shapes–like cliffs and stuff? Do you slop some goop on it? Paint it? It looks prettty porous by itself.

You cover it with tiling mortar/adhesive (I use Pro-Lite http://www.homedepot.com/p/Custom-Building-Products-ProLite-White-30-lb-Tile-and-Stone-Mortar-PLMW30/202753988 ) and paint it with flay outdoor latex paint (I use the 100% Acrylic variety).

That’s how I built Piz Styro https://www.facebook.com/media/set/?set=oa.10152046931159319&type=1

Presently in the long term testing phase, just like the castle ruins and a few other Styrofoam items constructed using the same method.

We use the outdoor paint designed for Pebble Dash , it only needs the one item for application .

Mike

ps . why are we pursuing this for “indoor and micro layouts” ?

You can alternately sift hydraulic cement on it and mist it to make a hard shell barrier to both protect and strengthen the foam, then use whatever type paint or stain you desire.

HJ, that’s what I wanted to hear/read. This is the material I mentioned, not the spray can expanding stuff. I was gonna post a photo, but couldn’t just paste it in my post without going thru the whole Freight Sheds process which is too labor intensive. Anyway, your tips sound good to me.

Mike, I just never thought of anyone building outdoor scenery out of anything that wasn’t solid–like rocks, concrete, etc. But I guess this stuff would work. Heck, ya can’t kill it!

Todd, where does one find “hydraulic cement?” Or is it one of those things that will make you a laughing stock at Home Depot? Kinda like asking the guy in the auto parts store for muffler bearings?

HJ, your mountain made me think of one of the ideas I had for this stuff–building a Christmas display with a choo-choo running around the mountain, all painted white, etc. Another wild idea I need to follow up on. Which I need like the proverbial “hole in the head.” :slight_smile:

BTW,I found some great videos on carving polyurethane foam (aka "blue foam and pink foam), but this is one of the better ones, narrated by the legendary Dave Frary.

https://www.youtube.com/watch?v=Mpko5rxM9pI

Joe:

Home Depot carries it - Quickcrete hydraulic cement. Should not be too big of an embarrassment beyond the normal experience one usually has when asking for help at the Depot.

Mark Hadler said:

Joe:

Home Depot carries it - Quickcrete hydraulic cement. Should not be too big of an embarrassment beyond the normal experience one usually has when asking for help at the Depot.

I guess there are regional differences, the local HD has friendly employees.

The guys and girls patrolling the aisles are always good for a chat - one guy builds boats and is very interested in garden railways, another one likes to use his native German, one is a former plumber who readily relates to installing stuff in confined places etc. etc. With one of the cashiers I exchange the fitting jokes. Sheesh, it’s almost fun going to HD, other than the money that’s left behind.

Hans, the HD employees around here, for the most part aren’t very knowledgeable, and they are usually young. I think the rudeness that I have experienced from them stems from that. They know they don’t know, and they are too young to roll with it without being “short” with the customer.

All the HD and Lowes people are very helpful and friendly, since a new Lowes store went in close to an existing HD they are all trying to steal business from each other.

Greg

David, I’m with HJ on this. All of the four Home Depots we frequent seem to have very knowledgeable employees who are also very helpful. In fact, I was shopping for a new battery-powered drill and drill/driver, but was confused by all the reviews I’d read. “Mario,” who was a hardware geek took me through the half dozen candidates (Makita, Black & Decker, Milwaukee, etc) and helped me make my choice, Ryobi, which was not his own pick, by the way. A lot of it has to do with where the stores are located and who the clientele is. For example, one store is in the city and gets a lot of commercial customers, so the staff there knows its way around, so to speak, although they may not be all “touchy-feely.” Another store is located in an upscale residential 'hood, where the customer is king (“Can I get you a latte?”) and you are personally escorted to the aisle you want. Or it could be that some people are just nicer than others.

Oh, Loew’s is good too, although they are not as hard core, IMHO, as HD. But it was Loew’s, which is “touchy-feely,” that got the old Home Depot off its butt and made its stores more customer oriented. Do ya think I should get into marketing? :slight_smile:

Mark Hadler said:

Joe:

Home Depot carries it - Quickcrete hydraulic cement. Should not be too big of an embarrassment beyond the normal experience one usually has when asking for help at the Depot.

Yeah, that’s the stuff.

Just use a spray bottle to mist the surface, and using a strainer, sift the cement over that area. Its very easy to do horizontal and angled surfaces, but not so easy on vertical surfaces, so it’s best if you can handle/tip your work. But even these can be done using a “side draft” fan.

Apply the cement and repeat as necessary to build up the area to 1/8"+ thick.

(http://c.shld.net/rpx/i/s/pi/mp/17086/3057176007?src=http%3A%2F%2Fcontent.mydoitbest.com%2FImageRequest.aspx%3Fsku%3D264092%26size%3D2%26warehouse%3DD%26newsize%3D600&d=a0370214be7e9c3aa8aa1df94b47a27528546241&hei=546&wid=546&op_sharpen=1)

Well, I guess I just don’t live in the right area or I haven’t talked to the right folks at those stores. I do tend to frequent Lowe’s more then HD, because there is a Lowe’s 4 blocks from my house. But, for some reason, I tend to ask for the wrong things when I go shopping at either one. Like a torsion spring for a garage door, or a lock-set for an entry door. Stuff the clerks admit that they don’t know anything about.

I am rather surprised at the comments re store employees . My experience of them in Canada and the USA has always been pleasant , they are most helpful .

But here in the UK , I always buy tools and so on via the internet ;we have a few companies who have shop outlets that are used to a large extent by tradespeople , and offer next day delivery at very competitive prices .

All of my Proxxon tools without exception came via the post or courier . So did the Makita drill , planer and sanders .

The lathe and miller were shop bought because I wanted to see what they were like before forking out lots of dosh .

The advantage here is buying via ebay and using a credit card gives double protection if the stuff is not up to spec .

Mike

Just to keep the ball (thread) rolling–and to avoid work, which is taping drywall seams–I hope this here Hydraulic cement ain’t the same stuff I bought earlier to fix the 54-year-old garage foundation, which seems to be crumbling on the surface. When I read the fine print on the container, it cited all the bad s*^# that could happen if you touched the stuff, inhaled it, etc. So I returned it and got my money back. Just sayin…

Hey, just got an idea (my first and last of the day): Could you mix this stuff into your decomposed granite roadbed, mist it like Todd says, and make it solidify to make the roadbed kinda permanent, so it wouldn’t settle and/or blow away? Just askin’…

Joe Rusz said:

Just to keep the ball (thread) rolling–and to avoid work, which is taping drywall seams–I hope this here Hydraulic cement ain’t the same stuff I bought earlier to fix the 54-year-old garage foundation, which seems to be crumbling on the surface. When I read the fine print on the container, it cited all the bad s*^# that could happen if you touched the stuff, inhaled it, etc. So I returned it and got my money back. Just sayin…

Hey, just got an idea (my first and last of the day): Could you mix this stuff into your decomposed granite roadbed, mist it like Todd says, and make it solidify to make the roadbed kinda permanent, so it wouldn’t settle and/or blow away? Just askin’…

Yes Joe,

A few issues back there was a “If only I’d known” write up in GR about just that technique.

Hey Joe- Remember back in the day when you lived in good old Buffalo? Well, hydraulic cement is the stuff you would use to fix the leaking crack in your basement walls- which was, of course caused by that old east side house settling. Now that your in California, the whole house moves with those earth tremors yous guys get, which probably makes the entire house crack! Hydraulic cement ain’t gonna help that! It might help your ballast, though.

-Kevin.

This foam doesn’t react well with weather. It will turn an ugly brown and deteriorate if left exposed. So sealing it up is a must if this is outdoors.

I used this stuff to fill out the rock face behind the high trestle on the pizza. I used the lowest expanding stuff and just worked it as I sprayed it, some curvey bouldery shapes some scrapped jagged shapes. Its a PITA either way. Do some experiments first to learn how it sprays and how to work it and set it up as you spray. Better to pay for a couple extra cans than screwing it up on application.

Naw, Kevin. This ain’t settling. This is the concrete reverting back to its original state, i.e. lime and whatever. It’s a surface thing. I’ll send an iPhone shot to your email, I hope. As for our house breaking up in The Big One, I doubt it, since it’s made mostly of cardboard. A few years ago during the Northridge quake, my wife and I stood in the hallway and watched the walls sway, but never crack. In fact, we never even had surface cracks, like in the ceiling. So much for shoddy construction. As for our Buffalo house, its basement never leaked, 'cause if it did, Dziadzia" and Babcia woulda drowned, since they lived down there. It was private, very cozy and warm in the winter because the oil-burning furnace was there. Cool in the summer, too. Gee, I miss my grandparents. BTW, did I tell you that a guy from our old 'hood (Fillmore and Best) lives four doors away? Talk about small world.

Vic, I’m having second thoughts about that foam, which is brown and very granular. All ya gotta do is touch it and it begins to disintegrate into fine powder, which makes me wonder how much of the stuff I inhaled when I was prying it off the walls. I have stacks of the stuff and it’s tempting to use it, but you would definitely have to seal it to keep it intact. HD sells similar looking stuff (it’s about 2-3/4 inces thick), but if I was gonna use anything it would be the blue or pink foam, which sits right next to it at HD.

Of course, first I gotta finish my garage/man cave–sanding the tape joints, painting, and installing the last melamine cabinets. Then I can get back to trains, while taking me wife to chemo camp every week (a story for another time and place).