Wall lining alternatives

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1 year 10 months ago #15 by L and D
Hello there, we have been in the process of planning our build and have considered many practical/traditional strawbale finishes for the walls however in some areas of the plan we would like to use alternative finishes to render and have a few questions. Most of the research we have done has resulted in extremely vague explanations and has not really answered the reasons why they may or may not work and we’d love some input from anyone and everyone.
Firstly we are curious to know what effects sisalation has on bales when placed directly to the against them? Has this been done successfully? Does it hinder the breathability of the straw and/or create moisture? And would you need to spray a coat of render first? Not sure if this is practical but we are interested in finding out why.
Our other query relates to protection from extreme wind conditions, the west facing walls of the house will cop extreme wind for at least half the year. We can see the benefits of utilising corrugated iron to protect the bales and render.
Similar to the questions we have for the use of sisalation, we realise this has been done by many builders and would like to know the most successful approach to utilising corrugated iron against bales. We are grateful for any feedback and look forward to making the most of this forum. – Thanks Lou and Dags

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1 year 10 months ago #17 by sabale@bigpond.com
Sisalation is not a good option, a membrane for condensation and not breathable, T'yvec or other breathable options are available.
while some of these fabrics are breathable , some are not rodent / insect or damage resistant. choose carefully, and some may be best protected and or isolated from the straw with plywood, fc sheet or timber lining or the like.

cladding the external of a strawbale wall is known as" Rain Screening " not only used in conjunction with strawbale walls but an internet search will gain you an insight.

some form of sealing the bale wall is required, full cover of the straw with render ( as in leave no straw showing ) prior to cladding is one option, if a clay render this may also be highly efficient in moderating moisture content within the wall.
as a minimum I would use ply lining , then a vapor membrane then an air gap and then the cladding.

is it at this point i should let you know many strawbale professionals offer consulting services,
it's starting to look like your designer may require some experienced assistance.

regards lance
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1 year 10 months ago #21 by L and D
Replied by L and D on topic Wall lining alternatives
Thanks Lance,
this is great we appreciate the information and will look thoroughly into these further.
Many thanks Lou and Dags

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