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