Instinctively, i'd say it was foam of a different (higher) density
The two most commonly used spray foam products are low-density,
open-cell SPF (nominally referred to as �1/2 pound�) and
medium-density, closed-cell foam (�2 pound�). Foametix offers both
types of SPF, dubbed Blue Max 050 Open-cell and Blue Max 200
> He coated it with a blue foam, which he called 'Two pound foam'.
> What is this stuff?
> does not help.
Google does if you look...
Armaflex is a preformed pipe insulation which is closed-cell.
But the foam may move with heat variations,
the concrete may crack,
and water seep in,
so i guess that to do a long-lasting job
when the snow's gone i'll have to clear it all out
and use concrete to infill.
Hardly a critical location. Even on my gable end wall, which faces SW
and has a minimal slate overhang, I only used mortar. Stick some pva in
the mix if you're woried.
> Armaflex is a preformed pipe insulation which is closed-cell.
Armaflex is also neoprene, so that the cells flex if they do happen to
be wet and frozen. Stiffer foams (PU, PIR) will tend to crumble
gradually over the years.
One of my favourite things in the workshop ever is a roll of "Armaflex
gaffer tape", 3mm sticky-backed neoprene. It makes non-slip pads under
furniture, anti-vibration handle wrappings on power tools, draught
excluders on windows, the works.
I've seen Holmes on Homes mentioned a few times and kept wondering WTF
does Eamonn know about houses ...but now I know
This might be of interest
Smallest of the Touch 'N Foam Kits -
(15ft2 or 1m2 at 1 inch or 25mm)
which I hope is the correct kind of exterior closed cell foam
for using where water might dribble in.