blowing into the walls shouldn't be a big deal even with the hole drilling, they'd lift the outer layer of siding, drill underneath, and then bung/re-lay the siding so you'd never know. Doing it yourself would be cheaper, but probably require scaffold to do it right :-D.
the attic thing you could do yourself although it's a bit messy :-)
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timeasmymeasure
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Date: 2008-12-01 09:42 pm (UTC)the attic thing you could do yourself although it's a bit messy :-)