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Author Topic: Pour over  (Read 16119 times)

RSI

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Re: Pour over
« Reply #15 on: April 21, 2017, 07:09:05 PM »

Before ripping out the slab and replacing it, I would hookup a gas or oil boiler to it and make sure it is the problem. Or at least heat with a Modine for part of a winter till you can tell how much difference it is making. You really don't want to replace it all and have it end up no different.
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mlappin

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Re: Pour over
« Reply #16 on: April 21, 2017, 10:00:55 PM »

Didn't skip any Insulation.  Radiant pump runs 75 percent.
Wish I had that data logger today, 200 ran from 830 this morning until 230 this afternoon to bring the water too 180.

HUH? Seriously something is very wrong somewhere.

I restarted my G200 last night, water was like 72 degrees. Did a charcoal trick, in five minutes was running pretty strong, so lets say from 8pm till a little before midnight it ran, in that time it brought the 200 gallons in the stove up to temp plus the 450 gallons in the shop.

Do you have temp gauges on the supply and return at the stove? If so what are the temps? if it’s obvious the garage is sucking all the heat, whats the actual temp of the supply when it gets there compared to when it leaves the stove?

I didn’t even have to go into my shop to tell when the waste oil boiler to FPHX pump kicked in, one time I checked and the supply and return were as close as possible with the inherent accuracy of the gauges, next time I checked supply was 142 while return was about 98.
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coolidge

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Re: Pour over
« Reply #17 on: April 22, 2017, 04:49:24 AM »

RSI,   I have been heating half of this winter with the modine, it does use less wood, but my work materials need to be warm in order to use them, setting them on the radiant does that.

Underground pipe is good from what the gauges inside garage and back of boiler say.
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Western Maine

coolidge

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Re: Pour over
« Reply #18 on: April 22, 2017, 04:57:42 AM »

I am going to put thermal breaks around the slab if I can get a mini this week.
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Western Maine

hondaracer2oo4

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Re: Pour over
« Reply #19 on: April 22, 2017, 11:51:27 AM »

Do you have a thermal break between the frost wall and slab on the interior? I can't see exterior insulation doing much to isolate the slab, the frost wall will still suck the heat right out of the slab and send it to th ground. It was my understanding that the exterior insulation aroun the frost wall is to keep the frost from getting under the slab and heaving it.
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coolidge

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Re: Pour over
« Reply #20 on: April 22, 2017, 01:30:46 PM »

It's a floating slab. This is a test hole, no wet Insulation.
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Western Maine

slimjim

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Re: Pour over
« Reply #21 on: April 22, 2017, 02:18:55 PM »

It does look pretty wet under the slab though and is that the perimeter wall, if so how deep does the vertical insulation go?
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coolidge

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Re: Pour over
« Reply #22 on: April 22, 2017, 03:23:41 PM »

It is wet now, been raining hard, dug that hole last Tuesday.  Insulation only goes down a foot.
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Western Maine

slimjim

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Re: Pour over
« Reply #23 on: April 22, 2017, 03:27:26 PM »

Personally, I think you found your issue, getthesides down a few feet and I think you will see a major difference!
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coolidge

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Re: Pour over
« Reply #24 on: April 22, 2017, 06:01:28 PM »

That's on my list, just need to get a mini, they are all out a couple weeks.

Would that be a good reason to buy one? Wife said no already.
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Western Maine

hondaracer2oo4

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Re: Pour over
« Reply #25 on: April 22, 2017, 06:39:55 PM »

You have to totally isolate the slab from the earth. If you don't then the earth will suck the heat right out of the slab. Think foam tub with slab inside.
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coolidge

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Re: Pour over
« Reply #26 on: April 22, 2017, 07:07:23 PM »

The picture is an area I removed the insulation to see if it was wet, the slab does not touch earth anywhere.
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Western Maine

hondaracer2oo4

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Re: Pour over
« Reply #27 on: April 22, 2017, 08:45:12 PM »

I see now. Looks like spray foamed the perimeter. Where would you be adding more insulation then?
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schoppy

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Re: Pour over
« Reply #28 on: April 22, 2017, 10:28:54 PM »

Picked up an E35 Bobcat Mini with 22 hours on it (just came off a 2 year lease), enclosed cab with a/c and heat, 2 foot bucket with the clam jaws just like new for 25K. I was offered 5K more than I paid for it a week later.

Anyway, I used 2" high density foam everywhere on my 50x60x16 shed with the perimeter only down 1 foot but that is about 4 to 5" below the 2" foam under my slab. 6mil vapor barrier over the top of the tubing which was stapled down to the foam and my cement contractor used wire mesh which he pulled up into the cement as he poured. Heats beautifully.

Coolidge are you loosing water anywhere? 
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coolidge

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Re: Pour over
« Reply #29 on: April 23, 2017, 05:15:00 AM »

Honda,  Digging down along perimeter, 3 ft below slab ( if possible) and adding 2" foam board.

Schoppy,   Not losing any water.
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Western Maine
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