Several times we have had a cold call trying to get us to have insulation injected into our cavity walls.
The main reason that I have refused is because the house, being built in 1969, does not have stainless steel ties.
They are most likely of galvanised steel, and the best way for them to stay free from corroding away is for the cavity to be free to breathe.
Our neighbour (adjoining) has had theirs done, and it has left me with a couple of questions, which I must remember to ask him.
I understand that the insulating medium is of individual beads. This makes me wonder:
(1) How do they know when the cavities are all filled?
(2) In the case of a semi-detached house, what prevents the insulation beads from spreading into the cavities of the adjoining property?
The main reason that I have refused is because the house, being built in 1969, does not have stainless steel ties.
They are most likely of galvanised steel, and the best way for them to stay free from corroding away is for the cavity to be free to breathe.
Our neighbour (adjoining) has had theirs done, and it has left me with a couple of questions, which I must remember to ask him.
I understand that the insulating medium is of individual beads. This makes me wonder:
(1) How do they know when the cavities are all filled?
(2) In the case of a semi-detached house, what prevents the insulation beads from spreading into the cavities of the adjoining property?
