Internal Lime Plaster

[Alberto Morales]

Hi,

which Internal Lime Plaster is in the WUFI library? it is for a IWI case

Regards

[Christian Bludau]

Dear Alberto,
you can search for “lime” in the WUFI material database and select a suitable or similar lime plaster from the available entries.
Christian

[Alberto Morales]

Thanks for your reply.

I do but for this case It is difficult to know if it is usedfor internal or external purposes. Sometimes It is good to have a better description of the material

[Christian Bludau]

Hi Alberto,
I agree, but from a material perspective, lime plasters are often applicable on both interior and exterior sides.
Many applications the basic hygrothermal properties are comparable, and for interior applications, the vapour diffusion resistance (µ-value) is typically the most relevant parameter. Properties such as liquid transport or rain exposure are mainly more relevant for exterior applications.
Christian

[Alberto Morales]

so, do you mean that I can use a lime plaster with the name "interior" for exterior lime render?

[Christian Bludau]

Yes, that is what I meant. If the material properties are reasonably similar and no more representative exterior material is available, using the interior lime plaster as an approximation for the exterior render can be acceptable. Just keep in mind that exterior renders may differ in properties that affect rain exposure and liquid moisture transport.