Topic: Environmentally friendly underfloor insulation

Re: Environmentally friendly underfloor insulation 

Thanks RGM. I'd love to see some photos of how you put the planks in place and how they are placed between floor and joist.

Re: Environmentally friendly underfloor insulation 

Sounds like a careful and thorough installation RGM.

Just one question. Is rising damp a condition that you contend with in your case ie: damp soil conditions under the house? I'm not sure how much it would affect things, but it always pays to consider all moisture sources (and drying directions) when using polystyrene.

Your floor sounds very toasty - it would be great to see a few pictures.

Re: Environmentally friendly underfloor insulation 

Some pics of the process

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Polystyrene beads in wall

Re: Environmentally friendly underfloor insulation 

Heatpump duct

Re: Environmentally friendly underfloor insulation 

New 200mm vent

Re: Environmentally friendly underfloor insulation 

400watt energy use through night keeping house at 18 degrees

Re: Environmentally friendly underfloor insulation 

400w energy use through night keeping house at 18 degrees, spike is hot water heating in morning.
Hot water heat pump next to fix this

Re: Environmentally friendly underfloor insulation 

Heatpump Duct outlets, a maximum of 2 can be used

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Will upload pics of underfloor tomorrow.

Re: Environmentally friendly underfloor insulation 

Looking forward to it, mate.

Thanks for sharing.

Re: Environmentally friendly underfloor insulation 

So, can you control the individual ducts? E.G Shut off the main zone and leave bedrooms on, by remote?

Re: Environmentally friendly underfloor insulation 

The main Heatpump has to be on but the duct by the bedrooms can be adjusted by winding the vent in or out.
I have managed to balance it so that when it's 22 degrees in lounge it's 18 in the bedrooms.
At night when it drops to 18 in lounge it 16 in bedrooms which is a nice temperature to sleep in.
Much better than before I did the work, we used to have oil filled electric radiators and electric blankets in the bedrooms, now we don't use either.

If I did a new house, I would put in a fully ducted system but they come in at $16,000 this unit was 10

Re: Environmentally friendly underfloor insulation 

If you were building a new house, and an underfloor system also cost $16,000 - (far superior for heating),
would you still put a fully ducted system in?

If so, please give your reasons. Just curious.

JK

Re: Environmentally friendly underfloor insulation 

Hi Caziques
It would depend on wether the house was single or multi- story, if single an underfloor system would work well but if I were building a multi-story house then i would go for ducted.
If I were building in an earthquake zone then I would build the house on piles insulate the underfloor and put in a ducted system.

Re: Environmentally friendly underfloor insulation 

Difference between Expol underfloor and 100mm Polypalace polystyrene insulation

Re: Environmentally friendly underfloor insulation 

More of Underfloor

Re: Environmentally friendly underfloor insulation 

I Understand there is a thermal break where the joists touch the floor, but they are 6 X 2's and wood isn't a very good conductor. There is also foil between joists and floor.

Re: Environmentally friendly underfloor insulation 

Nice looking job.

The foil won't be much use any more, (other than as a air barrier if no holes) unless there is an air gap around it as conduction becomes the way heat is transferred. Doesn't matter as the poly does a better job.

I watched an old DIY rescue show a while ago where the (experts) proudly put foil between the floorboards and a layer of OSB, sheeze!