WUFI

Thanks again for you explanation.

However I did not understand the next "If in your case the heat flow can be expected to be predominantly upwards or downwards, you may choose the respective options. Otherwise, the next best option is probably to use a mean value.". Could you please put an example ...

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

Hi,

how a 250mm air layer should be calculated as nothing is in the WUFI library? which vapor resistance should be defined?

this layer is part of a suspended ceiling so not adjacent to vapor barrier layers

Capture 1.PNG

the plot below show data for different air layers from the library but for ...

if I have an air layer of 32mm...how can I define it?

Hi,

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

Regards

Regarding to the other answers 1 and 2 of your previous reply, if I don't put any moisture source air leakage q50 for historical building could be well assumed or rain leakage (I doubt that there is not crack around old windows in contact with the wall), WUFI "says" that it is not risk for the wall ...

Thanks for the reply. I really appreciate it.

when I want to calculate the final conditions (water content) of the original wall (just stone wall and render) which will be the initial conditions of the proposed wall (with interior insulation), do I also need to set an air leakage rate (q50) on the ...

Hi guys,

I have the next build-up

25mm lime render
500mm Stone wall
20mm unventilated air cavity
100mm mineral wool
15mm plasterboard

1- Should I add 1 % of driving rain? if yes, where should I place it? In the outermost 5mm of the render in contact with external ambient?
2- Should I add a air ...

Could you please put an example of these steps:

2- Calculate the outdoor absolute humidity from your climate file..Where to have a look in my climate file?
3- Add the humidity supplement according to pic 2 or 3...do you mean using these pic (green lines to determine the absolute humidity in the ...

Hi,

Could you please post the regressive line for each model (green line)?

Regards

Thanks a lot once again.

1- Then to analyse the relative humidity on the mineral wool , there are two possibilities:

- outermost grid element of mineral wool insulation or

- innermost grid element of WRB

Is it right?

2- what happens if using the RH analysis, I am in the save side but using 1cm ...

Hi

Thanks for your reply.

I follow your explanation until the point 2. So I added the 1cm because I already read this procedure. But thanks anyway

But I don't understand the first part of the comment after

1- "Normally it is said the typical threshold value of 80% but reading on internet it is ...

Hi,

What is the maximum relative humidity for mineral wool?

My roof is :
Ventilated roof void
WRB
300 mm mineral wool
150 mm mineral wool between timber joists
Vapor barrier
12'5 mm plasterboard
3mm skim plaster

1- I placed an air infiltration (5 mm) in the outermost side of the 300mm insulation ...

hi,

I wonder how I could model in WUFI pro a green wall. what are the limitations?

how accurate will the results be in WUFI pro?

Regards

hi,

any feedback or comment please?

regards