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Insulation In The Walls (External And Internal), Floors & Ceiling

KristinaLeaningForward KristinaStanding KristinaKneeling

Kristina and I decided early on in our careers as environmentally friendly consultants, that installing insulation in the internal walls made perfect sense. The additional cost is minimal. The results are dramatic!

In the photo above Kristina is in our master bedroom. On the LHS where the bi-folding windows are this is obviously an external wall (yes my MBA taught me something - but just not that observation...), anyway, where was I - oh yes, she is ripping the GreenStuf insulation from Autex Industries to finish off stuffing any gap she can fill.


Behind her is the internal wall between our bedroom and the middle bedroom of the house. We wanted to obviously dampen any noise made in either room so it was not transmitted into the other room(s).

Here you can see why I married Kristina - she is so darn HOT! (and not just from ripping and installing insulation!)


Now this is either taken on a different day, (hence the change of clothes), or ??? There is no other reason - this is one practical woman - one of the other reasons I married her!


And the reason she didn't insulate the section of the wall behind her in the previous photo (or this photo?) - cause an inspector needed to come to check we had used plywood on the wall to make it rigid! (See - you thought I was just an electrician!) - Then we insulated it.


One of the keys to installing insulation is to make sure you don't leave ANY gaps, and to ensure it doesn't slump (a couple of well placed staples in the top of each pad does the trick) throughout the life of the house. So Kristina is inspecting each pad in this photo. We were absolutely 'anal' with this! By blocking every single hole you also dampen noise transmitting from one room to another - and since I have installed stereo speakers in every room of the house I might just need that sound proofing I suspect when the girls start to compete with MY selection of music... what do you reckon?


Why did we use Autex's greenstuf product? Simple really - I don't like itching from handling Pink Batts (made out of glass: good use of old glass), and like all of the companies we dealt with - Autex had excellent customer service fronting people to who were BOTH helpful (never too much trouble answering our questions) AND friendly. Price difference was not worth bothering to compare (not that I am saying Autex's product was more expensive - it wasn't - it was just easier to deal with friendly people! Wouldn't you make the same choice in the same situation?

In addition, we gave the builders (and us as I took 6 months off work to build / wire / plumb the house with the team of subbies) a massive headache by using the highest insulation R value as possible - the same thickness insulation as you would use in Dunedin or Invercargill (i.e. in areas where the snow line is).


This made putting the gib on a nightmare sometimes - but we were determined to have the 'R' rating as high as possible to minimise the amount of heating required to keep the place warm in those cold winter months (well we think they are cold!)...

Solar Energy House C/- Simon & Kristina Cope | 19 Manapau Street, Meadowbank, Auckland 1072  |  New Zealand  |  Contact us now to arrange your tour

So you can't come and see the insulation inside our walls, but we did also insulate UNDERNEATH our house also with Autex's products and we also insulated INSIDE the attic - which you can see if you come for a formal tour of the house - cause also up in the attic is the biggest hotwater cylinder you will typically see in a domestic setup! (600 litres - 3+ times the size of a standard 180 litre HWC).


If you want to learn more about Autex Industries insulation products, then click here. If you want to book yourself, or a group of you to come and see, touch and ask questions, then click here. Otherwise, click here to read about why we also put insulation in the ceiling cavity between 1st & 2nd storey...


I think this diagram says it all.... but just in case, WITHOUT insulation you are losing 100% of ALL the heat you have generated within your home... a massive 35% via the roof, 25% via the walls, 15% through the floor, 10% out the single glazed windows and finally the last 15% out your doors....


How do you stem these heat leaks? Simple - insulate the house - the best thing you could do for your health and general wellbeing. The best $3000 to $5000 you ever spent!


Obviously it is easier and cheaper to insulate your home when you are building/renovating it, however, putting insulation in your roof cavity and under the floor is usually a simple Saturday's job...

I don't show a photo of underneath our place, but we also insultated there PLUS we put black plastic down directly on the ground to STOP the rising damp....