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M.: � <br />�-. <br />�'��: <br />��:_, <br />#rT[•.:. <br />a�^,.it;. <br />f.�'._ <br />�;, : <br />�.;;:'. <br />>Y. <br />;:; <br />;.: <br />t''. - <br />4 <br />r;' <br />';i. <br />r•,. <br />ar. <br />t':i . <br />�;.:,, <br />Y.. ' <br />t: <br />; <br />a• <br />LBARAGF. CONTROL - PACRAGE B � <br />�% � <br />6-mil volqethylene sheet black or clear. Uaual perm rating: 0.06. <br />Leae than 6 mil ie generally too fragile to uae in construction. If <br />also intended to act as a vapor retarder, the poly muat be 6 mil to <br />be eufficiently durable and etill meet the standard of 1.0 perm. <br />TIPS: <br />�Re�p poly stored out of the eun, to prevent poasible oxidation. <br />If available, uee greenhouse-grade poly. It contains <br />stabilizers vhich ehould asaure long aervice life. <br />2. Characterie[ics <br />l�VBII[8$GB <br />- Can provide a combined air <br />infiltration barrier and vapor <br />retarder. <br />- Can be inetalled in eheeta <br />with relatively few jointa. <br />- Readily available. <br />- Inexpeneive <br />- Eaeily inepected and <br />repaired until covered. <br />�.....w.....�:.� <br />. .;w^rrp;, z�' . <br />Msadvantagea <br />- In eingle wall type conetruc- <br />tion it may have to be sealed <br />at many points of penetration. <br />- Can be damaged during framing, <br />plumbing, electrical and drywall <br />work. <br />- Can be difficult to install in <br />some locatione such ae between <br />floore. <br />- Can be difficalt to handle in <br />cold, wet, or windy veather. <br />- Once covered, can'[ be <br />inepected or repaired. <br />4-15 <br />� <br />• <br />