4.6. Edition of building materials<br>

## 4.6. Edition of building materials

The User has a possibility of adding of new materials, selecting from main menu >> command „Tools/Materials edition (Ctrl + F) <<.

A window for materials edition will appear, containing in the left part a list of building materials declared in program and in the right part – fields concerning name of material, comment to the name, material group and fields determining thermal properties of materials.

It is possible to shift on list by means of mouse and cursor keys. The User does not have possibility of editing the materials declared in program. He can only, selecting required material in displayed list, read data concerning thermal properties and name, comment and affiliated material group displayed in fields on the right side of material edition window. It is possible here to add own (new) materials.

The User can display a list of materials in normal or group view, using tabs „normal view” or „group view”.

In normal view the building materials are displayed according to selected sorting feature, for example by alphabetical order in case of sorting by names. Selecting the material properties as a sorting feature the User will obtain their arrangement by increasing value, for example increasing material density.

After clicking the tab „group view” the material list will be grouped by material features and will be displayed in form of a tree, which can be opened to lower level by clicking the icon .

The User enters new material selecting from handy menu the command „Add material” or using the function key F7.

After clicking the inserted partition „New material 1” its edition fields will open. In these fields can be completed in succession data concerning material. These fields are:

Material name – The User inserts the name of entered building material,

Comment – a comment to the name of building material is entered here,

Group – for entered new material is assigned default group under the name „New group 1”. The User can change it switching to tab “group view” and entering the name in field “Group”,

r – material density in dry condition, kg/m3,

Cp – specific heat of material in dry condition, J/kgK,

m – Vapour diffusion resistance coefficient for building material, m*s*Pa/kg

It determines vapour permeability of partition material layer. Value completed according to building materials data. To declare an vapour insulating layer it is necessary to enter the symbol “INF” as a value of vapour diffusion resistance. This variable means infinite big value of vapour diffusion resistance of material.

The User can also select the set of physical parameters, which will characterize the material. Following possibilities can be selected:

- heat conduction coefficient,

- heat conduction coefficient and thickness,

- heat conduction resistances,

- heat conduction resistances and thickness.

Building materials declared in program are characterized by entering of heat conduction coefficient. For this reason the User, entering new building material should also complete fields concerning heat conduction coefficient of new material. Following fields are then to be completed:

- ls – calculation value of heat conduction coefficient for semi-humid material, W/mK,

- lw – calculation value of heat conduction coefficient for humid material, W/mK.

For such option the material thickness will be completed for each layer individually in partition layers table in „Partitions definitions” and the heat resistance will be also calculated there on the basis of entered data.

By selection of physical parameters of building material such as heat transfer coefficient and thickness, the User can declare the thickness of selected material and then he can use it as material layer for defining of layer partitions. In this way it is possible to create a material group, which we can use then defining typical partitions occurring in project.

Thermal features of building materials are determined for features of materials defined as semi-humid.

Under edition fields there are fields characterising in graphical way the surface quality of material. These fields are only active for materials entered by the User. Selection of any of these fields for new entered material will cause displaying the surface quality of material on a chart the temperatures drop and water vapour pressures drop in partition.

For edition fields there are available commands facilitating their edition. They can be called by means of right mouse button:

- Back – retreat from last made change,

- Cut – cutting of selected data,

- Copy – copying of selected data,

- Paste – pasting of selected data

- Select all – this command is active for data containing longer characters sequence.

Operations available in window of materials edition:

Handy menu:

- Add material F7 – adding of new material entered by the User. It is located default at the end of materials list under the name „New material 1”. To input all data of new material, the User has to select it on the list clicking on chosen one or select it by means of arrows keys. He can then enter all its data in fields located on the right side of materials edition window. New material is assigned to new material group, which is created automatically by the program.

- Add new group F8 – this command generates new material group, which is visible only in group view under the name „New group 1”. The User can enter its name in field „Group”. This command is active only in group view.

- Copy materials to User’s group – by means of this command the User can copy selected materials into previously created material group. This is particularly useful, if the User wants to insert a material group. He can make use of its content during defining of partitions. He can enter here for example most often used building materials.

- Delete Ctrl+Del – deleting of material or material group, on which the cursor has been positioned.

- Sort by density – causes arranging of materials by increasing density.

- Sort by names – causes arranging of materials by alphabetical order.

- Sort by specific heat – causes arranging of materials by increasing value of specific heat.

- Display User’s materials at the end – causes displaying of materials entered by the User at the end of list,

- Cancel – causes cancellation of intentional changes and closing of handy menu.

Keyboard:

- F7 – Add material – adding of new material entered by the User,

- F8 – Add new group – this command generates new material group entered by the User,

- Ctrl+Del – Delete selected material or material group,

Mouse:

- Clicking the right mouse button – displaying of handy menu,

- Clicking the left mouse button on entered material – switching to edition fields of this material.