cavity wall insulation??

[Beedub]

hi guys ive got a three bed semi with intregal garage, im about to book my cavity wall insulation as british gas are doing it free for dual fuel customers, im wondering will they insulate the cavity on my inside garage walls as the other side of my hallway is the inside wall of my garage, or do they just do the external walls front and back?

can someone give me a run down of what these guys will actually do? im kinda hoping they'll do inside my garage but im guessing they wont???

[Spudler]

Yes they will.