Purlin roof | Article about purlin roof by The Free Dictionary
A roof construction in which purlins are laid between the principal rafters; they support the boards that run between the ridge and eaves of the roof.
References in periodicals archive
If your home is pre-1965, it's likely you have a rafter and purlin roof
which is ideal for loft conversion.
Rafter and purlin roofs
, built pre-1965, are better for loft conversions as the pitch is usually reasonably steep and there are relatively clear spaces between the supporting framework.