Insulation roof lining

Claim 1

An insulated roof lining comprising a plurality of like-constructed roofing units supported on rafters in closely adjacent relation to one another, each of said roofing units comprising a planar board of rectangular shape fabricated of nonyielding hard material, a comparatively soft rectangular layer of fibrous insulation material attached to said board, said fibrous layer defining a pair of opposing substantially parallel fibrous faces of rectangular shape spaced from one another by the intervening fibrous material of said layer to define a thickness of said fibrous layer which is greater than the thickness of said board, one of said faces of said fibrous layer being in direct engagement with the inner surface of said board, the edge surfaces of said fibrous layer between said opposing faces thereof extending transverse to the plane of said board and being unconfined to permit the fibrous edge surfaces of each roofing unit to directly abut the fibrous edge surfaces of adjacent ones of said roofing units in said insulated roof lining, one corner of said rectangular fibrous layer being coincident with one corner of said planar board, the two edge surfaces of said layer and of said board adjacent to said one corner of said layer and board respectively being colinear with one another, the lateral dimensions of each rectangular face of said fibrous later being less than the lateral dimensions of said rectangular board whereby portions of said rectangular board extend beyond each of the other two edge surfaces of said rectangular fibrous layer to define inner surface portions of said board which are adapted to be located in overlapping contiguous engagement with outer surface portions of the boards in adjacent ones of said roofing units in said insulated roof lining, each of said units including an elongated reinforcing bar which is attached to said inner surface of said board, said reinforcing bar having a thickness in a direction transverse to the plane of said board which is less than the thickness of said fibrous layer, said reinforcing bar being embedded within said fibrous layer at a position substantially parallel to and substantially equidistant from two opposing edge surfaces of said fibrous layer, and the length of said reinforcing bar being substantially equal to the distance between the other two opposing edge surfaces of said fibrous layer.