For our last couple of projects in Cole Valley, 394 Frederick Street and 173 Downey Street, we wanted insulation that was effective and tight yet VOC (volatile organic compound) and Formaldehyde-free.
At the time, back in 2008, our best choice for the exterior was to use a concretious foam insulation called Airkrete that is shot in between the studs through a metal screen mesh to completely fill the voids and make an airtight seal.
In between floors and in the interior walls, we selected the Ultratouch recycled denim insulation – a non-toxic, non-flammable, pest-resistant cotton, really.
Both of those products worked great. No complaints…except perhaps that both are pretty darned expensive compared with Fiberglass insulation.
Now, a couple of years later, we looked again and found numerous formaldehyde-free Fiberglass options for our 1566 Sanchez project that cost no more than the old toxic fiberglass insulation yet are very very cost effective.
We chose to use the Knauf EcoBatt product – an unbleached formaldehyde-free insulation batt with R21 in the outer walls, R38 in the roof and R30 between floors.
It looks more or less like raw sheeps’ wool and installs quickly…without busting the budget yet keeping the toxins (and the heat or cold) out.
Green is on it’s way into the mainstream!