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gundar
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  #570276 18-Jan-2012 09:56
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At least in Hamilton, there are very tight regulations around putting in a fire place, so you probably wouldnt be able to get one retrofitted. Also, fitting a fireplace to a house that previously did not have one will affect your insurance value, so maybe call your council first to find out if it is possible , then call your insurance to see what the drawback is.

We have a fireplace, it is one that seals and is recessed into the wall. Each year it must be serviced or it starts to get inefficient and hard to start. The service is about $200 and includes stripping the chimney out. Mess is not a problem as we have exposed hardwood floors, so all it takes is a sweep and if used correclty, most of the ash and dust is vaporised - there really is little clean up if the heat is maintained well.

During the year, I clear the section and stor all wood over an inch in diameter in the basement to dry for the following Winter. Combined with untreated off-cuts from my other projects, I don't buy wood at all as there is always enough even though I'm on a suburban 800sqm section.

Before insulation, the fire would burn double the amount of wood and last until about 10pm on a single tub load of wood form the basement. After insualtion, the fireplace is warm until the next morning and only half the wood is used - also, the lounge is very toasty.

 
 
 

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Jaimita
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  #570284 18-Jan-2012 10:10
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The only purpose of polythene is to keep dampness out of your house, it is not an insulation product.

gundar
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  #570296 18-Jan-2012 10:38
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You're right, plastic does nothing for insulation, but it does significantly reduce the free moisture under your house, which does a lot for living conditions in the house (not to mention lifespan of the under house structure if you are on wooden piles or have exposed wooden floor structure).



Jaxson
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  #570317 18-Jan-2012 11:27
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SATTV: Expol has some serious design flaws and if not installed correctly ( like ours ) it is next to useless, I contacted Expol about 5 years ago and they said they were changing the design to something simalar to what I descripbed but never happened.
What problems and changes did you have in mind?

Jaxson
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  #570319 18-Jan-2012 11:31
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joker97: what do you guys think about pellet fire?


They require electricity to slowly feed the product in, ignite, and possibly a fan.  If they power is off they are a no go device.  Also you are pretty limited as to what product you can use, and therefore are subject to any price changes that occur.  I know some people have had mechanical issues with the feeders etc so were not that happy with the design of their model.

With anything though there will be pros and cons. 

SATTV
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  #570331 18-Jan-2012 11:54
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Hi Jaxon,
For expol to work correctly you need to trap the air under the floorboards, the expol has a ridge lengthways and air can flow from one end to the other. To fix this you need to cut a length of expol and roate it 90 degrees at the end of the joist to stop air movement ( and verman )
We had an insulation audit last year ( to get out heat pump on our rates ) and the insector said the exact same thing.
John




I know enough to be dangerous


gundar
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  #570333 18-Jan-2012 11:56
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@Jaxson/SATTV - I see the design of Expol has changed. They used to have two ridges on the top to create an air gap between the floorboards and the product, they are now just flat top and bottom for a flush fit.



Jaxson
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  #570338 18-Jan-2012 12:06
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Ok, so you're saying the air cavity can run right along each joist/floor section, unless you put a block at the end of each polystyrene piece. Fair call, I guess you could get some convection type circulation flow thing going on in that instance.

If you could create the air gap (though blocking the ends as well as above) then this would be preferable to just flush mounting the insulation. The extra air gap would add to the thermal resistance, contributing an extra bit (for free too) to the total system.

gzt

gzt
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  #570518 18-Jan-2012 18:16
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gundar: You're right, plastic does nothing for insulation, but it does significantly reduce the free moisture under your house, which does a lot for living conditions in the house (not to mention lifespan of the under house structure if you are on wooden piles or have exposed wooden floor structure).

Dry air = very good insulator
Wet air = very bad insulator

DarthKermit
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  #838194 17-Jun-2013 16:30
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In another thread I commented that I'd discovered these puppies under our house on Sunday:



Shows how damp it's been already this winter. Frown

There are a few more of 'em, but you get the idea.




Whatifthespacekeyhadneverbeeninvented?


Batman
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  #838227 17-Jun-2013 17:43
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non sunlight requiring plant?

DarthKermit
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  #838239 17-Jun-2013 17:44
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joker97: non sunlight requiring plant?


Yeah, I'm just worried that they'll turn into triffids!




Whatifthespacekeyhadneverbeeninvented?


stuzzo
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  #838305 17-Jun-2013 19:03
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If you send the photo to NASA they may be able to show there's been water flowing on that planet in the past!

bfginger
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  #1165403 30-Oct-2014 23:48
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Is there any difference between the polyester insulation sold for ceilings and the polyester sold for underfloors other than their factory cut dimensions? And is there any use in using wool insulation for underfloors?

timmmay
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  #1165447 31-Oct-2014 07:37
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The under floor stuff is rigid so it can hold itself in place. The ceiling stuff is loose and fluffy as that's more effective.

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