Sheeting- under galvanized iron may be of any mater- 

 ial over 8 inches wide and not fco exceed 2 inches in thick- 

 ness, set on approximately 3 foot centers; 1" x 8" or 2" x 4" 

 stuff is very satisfactory. 



Two men will lay approximately 1000 square feet of 

 galvanized roofing per day. 



RUBB3R OR g3LT ROOFING (SO CALLED). 



Hoofing of this kind is not recommended for general 

 use. Do not use it - (a) where it is necessary to shovel 

 snow from buil'lings . (b) upon buildings from which snow 

 slides, (c) where wide variation of temperatures occur; the 

 expansion and contraction soon ruins it. No serious ob- 

 jection is made to its use where temperatures do not fluc- 

 tuate widely. Many brands of so called rubber r felt roof- 

 ing are sold. Fo particular brand ie recommended. Always 

 buy for permanent buildings a 3-ply roofing, sold as a lead- 

 er by a reputable dealer. 



In the Sierras and northern Forests, Supervisors 

 are advised to use either shingles, shakes or galvanized 

 iron. 



Sheeting under felt roofing to secure a smooth sur- 

 face and to prevent cracking of the roofing must be surfaced 

 on one side. If felt roofing is to be laid on buildings 

 specified in the Manual, double the amount of board feet of 

 sLcotir,-,- of 1" x 4" and substitute 1" x 16" or 1" x 12" 

 SIS, and add 6 pounds of lOd. nails. To secure best results 

 the roofing should be laid in a continuous strip over the 

 ridge board from eave to eave, or on shed roofs lay, it 

 with slope of the roof and not at right angles to it. 



A FEE DON'TS. 



Don't lay felt roofing on a rough base. 

 Don't fix felt roofing when it is firat unrolled. 



Don't fail to unroll each length and leave it 

 until it lies perfectly flat unaided. 



Don't forget to lay the inside of the roll to 

 the weather. 



B.M. (9) 



