Calculate R_C value online

With the R_C value calculator from Recticel Insulation you can easily calculate the R_C value of a structure online according to the NTA 8800

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UTM medium

UTM source

UTM campaign

UTM term

UTM content

Rc value (result in m² * K/W)

Construction thickness (in mm)

In accordance with NTA 8800:2022

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JSON data

Project details
Application
Calculation Details
Result

Your project

Enter your project data here for which you want to make an R_C calculation.

Project name*

Start date*

Location*

Number of m²*

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Send an e-mail to technicalsupportinsulation@recticel.com.

Choose the construction

Flat roof

Cavity wall

Ventilated facade (Isofinish)

Ventilated facade (between the lines)

HSB facade

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If your construction does not fit in the calculation tool?
Request an RC calculation for your specific situation.
Send an e-mail to technicalsupportinsulation@recticel.com.

Construction details

Fill in the details of the material for each layer of the construction below.

Layers

Material #1*

Thickness in mm*

Material #2*

Thickness in mm*

Insulation

Insulation product #1*

Thickness in mm*

Lambda

Insulation product #2

Thickness in mm

Lambda

Additional layer

Additional layer*

Fixing anchors

Fixation*

Material*

Diameter*

Quantity*

Tule in mm*

Inside

Material*

Thickness in mm*

Insulation

Insulation product #1*

Thickness in mm*

Lambda*

Insulation product #2

Thickness in mm

Lambda

Cavity

Ventilation choice*

Thickness in mm*

Outside layer

Material*

Thickness in mm*

Fixing anchors

Material*

Diameter*

Quantity*

Existing (cavity) wall?*

Construction year*

Ventilated facade (Isofinish): Inside

Material*

Thickness in mm*

Insulation

Insulation product #1*

Thickness in mm*

Lambda

Insulation product #2

Thickness in mm

Lambda

Ventilated facade (Isofinish): Cavity

Air cavity thickness in mm*

Facade foil*

Thickness of cement bonded plate in mm

Thickness of strongly ventilated cavity with battens in mm

Facade cladding

Material*

Thickness in mm*

Fixing anchors

Centre-to-centre distance of wooden lines*

Material*

Rc calc: automatic amount?*

Rc calc: amount*

Are the wooden rails covered with sheet material, a foil and/or an extra layer of insulation?*

Ventilated facade between the lines: Placeholder 1

Material 1*

Thickness in mm*

Ventilated facade between the lines: Insulation

Wooden rule*

Height*

Insulation product #1*

Thickness in mm*

Lambda*

Wood percentage*

Ventilated facade between the lines: Placeholder 2

Material 3

Thickness in mm

Vapour open water resistance

Ventilated facade between the lines: Cavity

Air cavity*

Thickness in mm*

Ventilated facade between the lines: Outside layer or cladding

Material 4*

Thickness in mm*

Is the outer layer a stony outer cavity leaf?*

Are the wooden rails covered with sheet material, a foil and/or an extra layer of insulation?*

HSB facade: Placeholder 1

Material 1*

Thickness in mm*

Material 2*

Thickness in mm*

Vapor barrier*

HSB facade: Insulation

Wooden rule*

Height*

Insulation product #1*

Thickness in mm*

Lambda*

Wood percentage*

HSB facade: Placeholder 2

Material 3

Thickness in mm

Insulation product #3

Thickness in mm

Lambda

Vapour open water resistance*

HSB facade: Cavity

Air cavity*

Thickness in mm*

HSB facade: Outside layer or cladding

Material 4*

Thickness in mm*

Fixing anchors

Material

Diameter

Quantity

Diagram

Legend

Calculation Result

R_C value

–

Construction thickness

–

Nit R_C Conform NTA 8800:2022 bouwbesluit = R_C ≥ 6,3 m²K/W Nit R_C Conform NTA 8800:2022 bouwbesluit = R_C ≥ 4,7 m²K/W Nit R_C Conform NTA 8800:2022 bouwbesluit = R_C ≥ 4,7 m²K/W Nit R_C Conform NTA 8800:2022 bouwbesluit = R_C ≥ 4,7 m²K/W Nit R_C Conform NTA 8800:2022 bouwbesluit = R_C ≥ 4,7 m²K/W

Indicative calculation based on Building Decree NTA 8800:2022. The stated values may differ from the actual values. This program has been carried out with the utmost care, but does not exclude errors. Therefore, Recticel Insulation cannot be held responsible for any errors.

Do you have any further questions or do you want a different calculation? Please contact our technical service.

technischesupportisolatie@recticel.com
+31 488 470 170

Previous NextSend calculation in PDF

If your construction does not fit in the calculation tool?
Request an RC calculation for your specific situation.
Send an e-mail to technicalsupportinsulation@recticel.com.

Summary of construction details

Receive the full calculation of this construction?

Enter your details below and you will immediately receive the complete calculation in an extensive PDF report by e-mail.

Personal Details

Profile B2B relation*

Company name*

Calculated by

Last name*

E-mail address*

Telephone number

ex. +32 475 00 00 00

Postal code

ex. 8560

Project Details

Project name*

Start date*

Location*

Number of m²*

* fields indicated with * are mandatory

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Diagram

Legend

Calculation Result

R_C value

–

Construction thickness

–

Do you have any further questions or do you want a different calculation? Please contact our technical service.

technischesupportisolatie@recticel.com
+31 488 470 170

Previous NextSend calculation in PDF

If your construction does not fit in the calculation tool?
Request an RC calculation for your specific situation.
Send an e-mail to technicalsupportinsulation@recticel.com.

Thank you

Dear ,

Thank you for using our RC value calculator.

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Flat roof modal material #2 info

Flat roof modal core diameter info

Mechanically attached: Length of unprotected screw in insulation in mm
(always smaller than total insulation thickness)
Other situations: enter 0

(a) niet geventileerd (met reflectie)
Butt joints for draining rainwater are not regarded as ventilation openings according to NTA 8800:2022 C.3.2 (page 751); Table C.3 (page 754)

(b) zwak geventileerd (met reflectie)
Fixed rate 1000 mm²/m¹ completed NTA 8800:2022 C.3.4 (page 752); Table C.3 (page 754)

(c) sterk geventileerd (met reflectie)
Thermal resistances of all layers after and including the highly ventilated air layer are no longer required. Outdoor transition resistance corresponds to still air 0.12 (0.22 with reflection). NTA 8800:2022 C.3.3 (page 751); Table C.3 (page 754)

Ventilated facade (Isofinish) modal thickness material #2 info

Ventilated facade (Isofinish) modal fixing anchors info

VENTILATED FACADE (BETWEEN THE LINES) facade modal wooden rule height info

VENTILATED FACADE (BETWEEN THE LINES) facade modal wood percentage info

VENTILATED FACADE (BETWEEN THE LINES) facade modal cavity info

VENTILATED FACADE (BETWEEN THE LINES) facade modal material 4 info

HSB facade modal wooden rule height info

HSB facade modal wood percentage info

HSB facade modal cavity info

HSB facade modal fixing anchors info

Rc Calculator Netherlands

Calculate RC value online

Your project

Choose the construction

Construction details

Layers

Insulation

Additional layer

Fixing anchors

Inside

Insulation

Cavity

Outside layer

Fixing anchors

Ventilated facade (Isofinish): Inside

Insulation

Ventilated facade (Isofinish): Cavity

Facade cladding

Fixing anchors info

Ventilated facade between the lines: Placeholder 1

Ventilated facade between the lines: Insulation

Ventilated facade between the lines: Placeholder 2

Ventilated facade between the lines: Cavity

Ventilated facade between the lines: Outside layer or cladding

HSB facade: Placeholder 1

HSB facade: Insulation

HSB facade: Placeholder 2

HSB facade: Cavity

HSB facade: Outside layer or cladding

Fixing anchors info

Diagram

Calculation Result

Summary of construction details

Receive the full calculation of this construction?

Personal Details

Project Details

Diagram

Calculation Result

Thank you

Dear ,

Calculate R_C value online

Fixing anchors

Fixing anchors