unfelted

unfelted

(ʌnˈfɛltɪd)
adj
(Textiles) not felted
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
References in periodicals archive ?
Similarly, if your roof is unfelted, cut a layer of fibre insulation to fit the back of the loft hatch door, put it in a bin-liner to keep it tidy and then tack it in place
QOUR 1930s house has a big loft but the unfelted roof makes the area damp and very dusty.
ATHIS is usually only a problem if the roof tiles are unfelted. If the loft has been well insulated, it may be cold enough to cause the pipes to freeze.