This wonderful gem is a prime example of someone thinking outside the proverbial Foam box, he used polystyrene microbeads as the base foam filler to insulate his house for a fraction of the cost of hiring a professional.
Cheap wall insulation with polystyrene microbeads and a hair dryer
By Paul Kennett 2006-2011
I live in a small wooden 1927 railway cottage in Moera (New Zealand). In order to improve it’s energy efficiency I’ve insulated the roof (with one layer of new Pink Batts, and a second layer of used Batts), and insulated under the floor (a layer of polystyrene blocks plus a layer of aluminium-foil isolation . Next on the list was wall insulation (followed by pelmets above the curtains and more attention on stopping drafts).
I didn’t want to dismantle the walls in order to install batts so I was limited in my options. AirFoam (www.airfoam.co.nz) provide an insulation service where they inject low density (4 psi) expanding foam filler into the walls from the outside. The job would take them a day or two and require them to drill three holes between each pair of studs (bottom, middle an top) all around the house. They quoted just over $4100 for my house which was a bit too much for my budget (we’re saving to redo the roof).
So what you see below is my cheaper, but much slower, DIY wall EPS Bead insulation….
We’re also lucky that almost all our electrical wiring runs down through the interior walls of the house. This is important because polystyrene reacts with the plastic around electrical wires – it effectively “melts” it. Which would be a very bad thing. In the three places were there is wiring in our outside walls I’ve left those empty (I may inject something harless at some later stage.)
Briefly the process is:
- buy a lot of fire retardant EPS or polystyrene microbeads
- build a polystyrene foam microbead blower from an old hair dryer, plumbing bits and ventilation hose
- drill a hole between each stud pair, at the top of the outside wall
- blow polystyrene beads into wall
- plug the hole
- repeat for whole house until the walls are insulated with polystyrene microbeads.
To see the whole process please visit….http://www.myonlinediary.com/wall-insulation/
That’s enough for now, you have the link if you want to read it all, or you can wait a few days and I will add more from this really informative article about using EPS polystyrene micro beads as a foam filler in insulation.
Incoming Search Term: Polystyrene Microbeads for insulation.