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#1
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Pond Liner
Pete C wrote:
Derek Broughton wrote: Millimeters? Not "mils"? Liners in N. America are generally measured in mils, and a 75 mil liner is thick. If it's really .75 mm, that's 30 mils, and I'd say too thin for an EPDM or vinyl liner, but not HDPE and _perhaps_ not Butyl. Either way, butyl is a lot heavier than any of the alternatives at the same thickness. If it isn't heavier, it isn't butyl. My 0.75 millimetre butyl liner...... http://www.bradshawsdirect.co.uk/Bra...oduct/GLBU.htm QED ? QED what? I'd already discovered that in the UK they were typically being sold in .75mm, so I have no problem with that, but it's _still_ much heavier than any other pond liner for the same thickness. Unfortunately I can't find any actual weights - only the warnings that they need special shipping, which usually applies to EPDM, too. -- derek |
#2
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Pond Liner
Derek Broughton wrote:
Pete C wrote: Derek Broughton wrote: Millimeters? Not "mils"? Liners in N. America are generally measured in mils, and a 75 mil liner is thick. If it's really .75 mm, that's 30 mils, and I'd say too thin for an EPDM or vinyl liner, but not HDPE and _perhaps_ not Butyl. Either way, butyl is a lot heavier than any of the alternatives at the same thickness. If it isn't heavier, it isn't butyl. My 0.75 millimetre butyl liner...... http://www.bradshawsdirect.co.uk/Bra...oduct/GLBU.htm QED ? QED what? I'd already discovered that in the UK they were typically being sold in .75mm, so I have no problem with that, but it's _still_ much heavier than any other pond liner for the same thickness. Unfortunately I can't find any actual weights - only the warnings that they need special shipping, which usually applies to EPDM, too. looked for weights too, with no more success than you. As 45 mil EPDM is in fact 1.14mm thick, wouldn't that be more likely to be the heavier? -- Pete C London UK |
#3
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Pond Liner
Pete C wrote: Derek Broughton wrote: Pete C wrote: Derek Broughton wrote: Millimeters? Not "mils"? Liners in N. America are generally measured in mils, and a 75 mil liner is thick. If it's really .75 mm, that's 30 mils, and I'd say too thin for an EPDM or vinyl liner, but not HDPE and _perhaps_ not Butyl. Either way, butyl is a lot heavier than any of the alternatives at the same thickness. If it isn't heavier, it isn't butyl. My 0.75 millimetre butyl liner...... http://www.bradshawsdirect.co.uk/Bra...oduct/GLBU.htm QED ? QED what? I'd already discovered that in the UK they were typically being sold in .75mm, so I have no problem with that, but it's _still_ much heavier than any other pond liner for the same thickness. Unfortunately I can't find any actual weights - only the warnings that they need special shipping, which usually applies to EPDM, too. looked for weights too, with no more success than you. As 45 mil EPDM is in fact 1.14mm thick, wouldn't that be more likely to be the heavier? EPDM : 1.02 mm (.040²) 1.25 kg/m2 1.14 mm (.045²) 1.41 kg/m2 from this link: http://www.firestonebpe.com/lining/s...omembrane/_en/ Interesting that they say the lighter one is recommended for garden ponds .. They seem to not want to give us the weight of butyl, can't find it anywhere. San Diego Joe 4,000 - 5,000 Gallons. Koi, Goldfish, and RES named Colombo. |
#4
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Pond Liner
San Diego Joe wrote:
Pete C wrote: Derek Broughton wrote: Pete C wrote: Derek Broughton wrote: Millimeters? Not "mils"? Liners in N. America are generally measured in mils, and a 75 mil liner is thick. If it's really .75 mm, that's 30 mils, and I'd say too thin for an EPDM or vinyl liner, but not HDPE and _perhaps_ not Butyl. Either way, butyl is a lot heavier than any of the alternatives at the same thickness. If it isn't heavier, it isn't butyl. My 0.75 millimetre butyl liner...... http://www.bradshawsdirect.co.uk/Bra...oduct/GLBU.htm QED ? QED what? I'd already discovered that in the UK they were typically being sold in .75mm, so I have no problem with that, but it's _still_ much heavier than any other pond liner for the same thickness. Unfortunately I can't find any actual weights - only the warnings that they need special shipping, which usually applies to EPDM, too. looked for weights too, with no more success than you. As 45 mil EPDM is in fact 1.14mm thick, wouldn't that be more likely to be the heavier? EPDM : 1.02 mm (.040²) 1.25 kg/m2 1.14 mm (.045²) 1.41 kg/m2 from this link: http://www.firestonebpe.com/lining/s...omembrane/_en/ Interesting that they say the lighter one is recommended for garden ponds . They seem to not want to give us the weight of butyl, can't find it anywhere. Thanks for that anyway -- Pete C London UK |
#5
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Pond Liner
Pete C wrote:
looked for weights too, with no more success than you. As 45 mil EPDM is in fact 1.14mm thick, wouldn't that be more likely to be the heavier? No, because Butyl is a denser rubber. -- derek |
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