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  Reply # 767671 22-Feb-2013 14:09 Send private message

Even with under floor, wall, and an excessive amount of ceiling insulation (20cm of wool then 1-2 layers of pink batts with no significant gaps) I still need a good sized heat pump in my living area. I have a 10kw pump now, the 7kw couldn't quite keep up, it was on a lot of the time. My house is very old though, weatherboard, but I've done a lot of work on insulation.





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  Reply # 767681 22-Feb-2013 14:42 Send private message

Yes I will go with the Windows first as we are in the process of renovating the rooms etc.

I heard that you need a council permit if you need to insulate the internal outside facing wall. Does anyone know if this is true? Not sure how much that costs but I should really get that done since I am wanting to do it properly.

Just to show what I mean image below.



I found the website:

http://www.dbh.govt.nz/retrofitting-insulation-guidance

However it talks about retro fit. Is that the liquid type insulation that they drill from the outside wall and fill it in? So do I still need a permit if I want to use pink bats? So I was planning on taking the current plaster board out and putting pink bats and putting the board back again. Anybody know this?







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  Reply # 767682 22-Feb-2013 14:44 Send private message

There is another side of double glazing that you need to keep in mind to which is how big are the gaps around your existing opening windows? For us the gaps were significant so replacing with new inserts meant that we were also removing a huge reason for lost heat via air leaking around the windows. A third benefit which has also been significant has been how much noise pollution is reduced. When we had them fitted it was the middle of cicada season and we were just blown away by how much of the noise was cut out.







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  Reply # 767683 22-Feb-2013 14:46 Send private message

I had the stuff injected into my walls from the outside. It's a bit of a nightmare, the holes never covered up as well as they should, plus they told me beforehand all I had to do was paint over them. After they told me that wasn't the case, I had to sand, it back, prime, paint. But my wood leaked oils for months. I don't know how much it helped either, I didn't notice anything but maybe we used less power, I don't know.

Taking the wall linings down, insulating, and putting them back up is pretty major. If it's gib you need to replace it usually, including plastering and painting. It's a big job and really disruptive, and expensive. It cost me about $4K to re-do one room, including gib, plaster, and paint recently.




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  Reply # 767685 22-Feb-2013 14:49 Send private message

timmmay: I had the stuff injected into my walls from the outside. It's a bit of a nightmare, the holes never covered up as well as they should, plus they told me beforehand all I had to do was paint over them. After they told me that wasn't the case, I had to sand, it back, prime, paint. But my wood leaked oils for months. I don't know how much it helped either, I didn't notice anything but maybe we used less power, I don't know.

Taking the wall linings down, insulating, and putting them back up is pretty major. If it's gib you need to replace it usually, including plastering and painting. It's a big job and really disruptive, and expensive. It cost me about $4K to re-do one room, including gib, plaster, and paint recently.


Its only me and wife we have a 3 bedroom house so we have already started on the master bedroom took out all the wall paper (that was a annoying job). So now that I have the windows decided before that I wanted to insulate the walls. But I don't know if you need a permit for it like my post above?







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  Reply # 767686 22-Feb-2013 14:52 Send private message

I can't help with permits and stuff sorry. I just hire good people and do the job well, I figure they'll tell me if I need permits.




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  Reply # 767689 22-Feb-2013 14:58 Send private message

I'm in Auckland and when we pulled out wall linings off to replace, and looked straight through to the external brick, we knew we had to insulate. I'm unsure whether it was a council requirement, but for us the council were very particular on how it was put in. We basically had to staple-gun building paper all the gaps between all the nogs and studs, and then put insulation in the pockets we created. Small 3 bedroom house and the insulation install guys did in under half a day and all the internal walls also for $1200 which was pretty good I felt. Then the old loose insulation in the roof was vacuumed out, and decent stuff replacing it. That along with the double-glazed windows and we are sweet.



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  Reply # 767702 22-Feb-2013 15:08 Send private message

wazzab: I'm in Auckland and when we pulled out wall linings off to replace, and looked straight through to the external brick, we knew we had to insulate. I'm unsure whether it was a council requirement, but for us the council were very particular on how it was put in. We basically had to staple-gun building paper all the gaps between all the nogs and studs, and then put insulation in the pockets we created. Small 3 bedroom house and the insulation install guys did in under half a day and all the internal walls also for $1200 which was pretty good I felt. Then the old loose insulation in the roof was vacuumed out, and decent stuff replacing it. That along with the double-glazed windows and we are sweet.


Did you take out all the walls for them to do? Or did they do it? Did they put the new wall back?
I am planning on doing this myself since we own the house we are taking our time. Trying to save on labour cost.







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  Reply # 767704 22-Feb-2013 15:15 Send private message

In our case, I gutted the house myself - its pretty basic stuff, just messy and time consuming if the gib down't come off easily. Pulled all the gib off, and left everything exposed, then window guys replaced the windows (as pictured), then insulation and new gib back up.




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  Reply # 767721 22-Feb-2013 15:27 Send private message

Awesome work! I am planning to do the same. Just going to hire like a budget bin and do it over a weekend.







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  Reply # 767740 22-Feb-2013 15:50 Send private message

Oriphix: Its only me and wife we have a 3 bedroom house so we have already started on the master bedroom took out all the wall paper (that was a annoying job). So now that I have the windows decided before that I wanted to insulate the walls. But I don't know if you need a permit for it like my post above?


Unfortunately you do require building consent for insulation of outside walls.
Installing thermal insulation in an existing buildingExemption (jg) of Schedule 1

A building consent is not required for the following building work:
  • (jg) the installation of thermal insulation in an existing building other than in-   
    • (i) an external wall of the building; or
    • (ii) an internal wall of the building that is a fire separation wall (also known as a firewall).
GuidanceThis exemption does not cover installation of thermal insulation in an external wall of a building, this may have weathertightness implications. Installing insulation in internal walls that provide fire separation is also not covered, as the installation could adversely affect the fire safety properties of the building.
Examples where this exemption could applyExamples where the work is not exempt and a building consent is requiredA house is being retrofitted with polystyrene insulation under the floor and fibreglass insulation to the ceiling.The external walls of a house are to be injected with expanding insulating foam.An existing apartment building is being retrofitted with fibreglass insulation to the internal, non-fire-rated walls for additional noise control.A fire-rated tenancy wall to an apartment is to be retrofitted with thermal insulation.
Info from: http://www.dbh.govt.nz/bc-no-consent-schedule-1#installing-thermal' target='_blank'>http://www.dbh.govt.nz/bc-no-consent-schedule-1#installing-thermal





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  Reply # 767745 22-Feb-2013 15:57 Send private message

graemeh:
Oriphix: Its only me and wife we have a 3 bedroom house so we have already started on the master bedroom took out all the wall paper (that was a annoying job). So now that I have the windows decided before that I wanted to insulate the walls. But I don't know if you need a permit for it like my post above?


Unfortunately you do require building consent for insulation of outside walls.
Installing thermal insulation in an existing buildingExemption (jg) of Schedule 1

A building consent is not required for the following building work:
  • (jg) the installation of thermal insulation in an existing building other than in-   
    • (i) an external wall of the building; or
    • (ii) an internal wall of the building that is a fire separation wall (also known as a firewall).
GuidanceThis exemption does not cover installation of thermal insulation in an external wall of a building, this may have weathertightness implications. Installing insulation in internal walls that provide fire separation is also not covered, as the installation could adversely affect the fire safety properties of the building.
Examples where this exemption could applyExamples where the work is not exempt and a building consent is requiredA house is being retrofitted with polystyrene insulation under the floor and fibreglass insulation to the ceiling.The external walls of a house are to be injected with expanding insulating foam.An existing apartment building is being retrofitted with fibreglass insulation to the internal, non-fire-rated walls for additional noise control.A fire-rated tenancy wall to an apartment is to be retrofitted with thermal insulation.
Info from: http://www.dbh.govt.nz/bc-no-consent-schedule-1#installing-thermal




This is where I get really confused. I don't want to insulate the external wall. But I want to insulate the internal wall that is external facing. Is that what they mean by the external wall?







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  Reply # 767746 22-Feb-2013 16:05 Send private message

Oriphix:
This is where I get really confused. I don't want to insulate the external wall. But I want to insulate the internal wall that is external facing. Is that what they mean by the external wall?


Yes, external wall is the one that has the outside on one side and the inside on the other side.




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  Reply # 767748 22-Feb-2013 16:09 Send private message

Bugger that means I need to get a permit to do that. Thanks for that. :)







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  Reply # 767755 22-Feb-2013 16:16 Send private message

Oriphix: Bugger that means I need to get a permit to do that. Thanks for that. :)


It looks like it.

I've seen products that you install on the inside wall and are essentially just a wall lining.  I'm not sure if they are available here but they might be an option.  They will make your room slightly smaller though.

It is also possible that the permit isn't expensive and difficult.  Any good insulation installer should be able to tell you.

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