20 MASS. ICXPERIMKNT STATION lUH.I.KTIN 360 



It is desirable to pro\i(le from 6 to 8 iiiclies of fill insulation for frame 

 walls, and frame roofs arc usualix' insulated willi 8 iiuhes of granulated cork or 

 other fill insulation. 



Table 4. — Ri\)iuuia) Rioi'Ukm.kation to OvI'.kcomi'. I1i;at Licakagk 1'i;k 100 

 S(^>UAKic Vv.v.r ()!• Arica. 



(Based on an ouliloor air IcniDeraluie ot 75 °, exceiU roof at 85 ", and Rrotind tcnipcratuie of 56 °.) 



Tons, Refrigeration 



32 ° room 45 ° room 



Concrete floor: 



4"slal) 00 .1800 .0825 



3" slai), .V linisli 7') .1580 .0725 



3"slab, 3" finish, 2" corkl.oard . . .1.^ .026(1 .0118 



3" slab, 3" finish, 3" corUhoard . . .00 .0180 .0082 



3" slab, 3" finish, 4" coiklx.ard . . .07 .01-10 .0064 

 Roof: 



r'siicathing, 2" corkl.oard, tar 



and gravel roof 12 .0530 .0400 



1" sheathing. 3 " corklxKud, tar 



,ind gr,i\( 1 roof 00 .0308 .0300 



r'sluMlhing, l"c,,rkln.,.rd, tar 



and gr.ucl roof 07 .0300 .0233 



1 " shell hing. ()"gi-,mul,Ucdcork,** 



roof boards and covering 00 .0308 .0300 



1 " shiathing, 8" granulated cork, 



roof boards and coxering 07 .0300 .0233 



lU-low AlHivr lU'l,.\v .\lH,ve 



Gronnd (".Hunui (iroiind ('•icunul 

 (^)l. Crete wall: 



6" wall 70 .1580 .2830 .0725 .1075 



12" wall 60 .1200 .2150 .0550 .1500 



6" wall, 2" corkboard 13 .0260 ()466 0118 .0325 



6" w.dl, 3" corkboard ()') .0180 .0322 0082 .0225 



()" wall, 4" corkboard 07 .0140 .0251 .0004 .0175 



12" wall, 2" corkboard 12 .0240 .0430 .0110 .0300 



12" wall, 3" corkboard 08 .0160 .0287 .0073 .0200 



12" wall, 4" corkboard 00 .0120 .0215 .0055 .0150 



I'ranic w.dl: 



6" granulated cork 00 — .0322 — .0225 



8"granukitc(l cork 07 — .0251 — .0175 



♦"C" is the number of B. t. u. whidi will pass UirouRli one square foot of maU-rial per hour per 

 dcRrec of temperature difference. 



♦♦(iranuiatcd cork under ideal condiiunis li.is iii> lu«hi-i lic.il ti.ni--iii ih.ni i oi khii.iul. t'ndor 

 ordinary conditions of installation IIk- sp.uc in.iy luil l)c i ciiiipKtc'> lilUd with loi k. hor tliis 

 reason the heat transfer throuRh Rianiilatcd cork is nivon as twice that tliroiiKh coiklioard. Thore 

 are a niiiiihei of commercial insulation tills haviuR a heat transfer coefiicieiit appioximatcly the 

 same as uianiilatetl cork. Dry planer shavings are aliout three-fourths as elTective as granulated 

 cork fii! iir>iulatiiiK. 



