THATCHING ON THE FARM 



321 



are not vertical, but overhang in order the better to exclude rain. The tail 

 of each apron piece is held in a slit cut in the adjoining piece, as shown at A in 

 the figure. A little solder is required at B, at each corner, where there is no 

 overlap. 



The upper horizontal flashing must be overlain, to prevent leakage. In Fig. 

 225 it is overlain by the galvanised iron roof capping. 



Where the chimney shaft is further down the roof -slope (Fig. 225), the upper 

 horizontal flashing must be covered by a galvanised iron sheet, having its upper 



■/?/OC£ . 



Fig. 225. 



edge tucked under the roof capping as shown. This sheet lies on top of the 

 thatch. 



Where the chimney is still further down the roof-slope, the upper horizontal 

 flashing may be extended well up the roof-slope, and the thatch thickened and 

 dressed over it, as shown in Fig. 226. 



To minimise danger of fire, chimney shafts should be carried well above the 

 roof-slope, and their walls should not be less than 9 inches thick. 



In place of metal flashings, an " oversaving" or projecting ledge of first-class 

 tile is sometimes formed round the chimney shaft, just above the surface of the 

 finished thatch. Gables may be similarly treated, or may have metal flashings. 

 From the point of view of appearance, however, a tile oversailing is superior. 



T 



