Kooltherm K20
Concrete Sandwich Board

Kooltherm K20 Concrete Sandwich Board

High Performance Insulation for Concrete Sandwich Wall Systems

Kingspan Kooltherm K20 Concrete Sandwich Board is a premium performance insulation product, used for concrete insulated sandwich wall systems.

The core of Kingspan Kooltherm K20 Concrete Sandwich Board is a premium performance rigid thermoset fiber-free phenolic insulant manufactured with a blowing agent that has zero Ozone Depletion Potential (ODP) and low Global Warming Potential (GWP).

  • R-value of 17 on 2 in
  • Higher R-value per inch than any commonly used insulation
  • ASTM E 84 rating of 5/5 (flame/smoke)
  • Unaffected by air infiltration
  • Resistant to the passage of water vapor


Product Information

Property Test Method Result
Nominal Thickness
(in / mm)
1.97 / 50
2.95 / 75
3.94 / 100
Standard Dimensions
Width (in / mm)
Length (in / mm)
47.244 / 1200
89.370 / 2270
Compressive Strength, Min. 
ASTM D 1621
Water Absorption, Max.
(% by volume)
ASTM C 209
Density, Min.
ASTM D 1622
Closed Cell Content
(% of cells closed)
ASTM D 6226
Air Permeance
(L/S/m³ / (cfm/ft²)
ASTM E 2178
0.001 / 0.000
Water Vapor Permeance, Max.²
Fire & Smoke
Flame Spread
Smoke Developed
ASTM E 84 / UL 723 5

*Contact Kingspan Insulation for available non-stock sizes

The R–values detailed below are quoted in accordance with ASTM C 518 (Standard Test Method for Steady-State Thermal Transmission Properties by Means of the Heat Flow Meter Apparatus).
Insulant Thickness Thermal Resistance
(in) (mm) (R-value)
1.57 40 13.5
1.97 50 16.5
2.36 60 20.0
2.95 75 25.0
3.15 80 26.5
3.54 90 30.0
3.94 100 33.5
4.72 120 40.0
* Kingspan Insulation’s maximum available thickness is subject to alteration without notice. At the time of publication, this specific insulation thickness must be built up from two thinner layers, but this may have changed by the time that the information in this literature is relied upon. Please contact Kingspan Insulation for current stock and non–stock sizes. Where multiple layers of insulation of different thicknesses are used, the thickest layer should be installed as the outermost layer in the construction.
Kooltherm K20 Concrete Sandwich Board Brochure

Kooltherm K20 Concrete Sandwich Board Brochure

Kingspan Kooltherm K20 Concrete Sandwich Board_Submittal_US_IMG

Kooltherm K20 Concrete Sandwich Board Submittal

TER 1601-06

Technical Evaluation Report 1601-06 NFPA 285 - Kooltherm Insulation Board

TER 1601-07

Technical Evaluation Report 1601-07 NFPA 286 - Kooltherm Insulation Board

TER 1603-04

Technical Evaluation Report 1603-04 - Kooltherm Insulation Board Exterior Wall Coverings Attachment

Kooltherm Safety Data Sheet

Kooltherm Safety Data Sheet

Kingspan Kooltherm Section 07 21 00 Building Insulation

Kingspan Kooltherm Section 07 21 13 Phenolic Insulation


CSI 3-Part Specifications

Click the link below to view our CSI 3-Part Specs from ARCAT in a variety of file formats.

Kingspan Insulation CSI 3-Part Specifications

View and Download the Specifications

Kooltherm Insulation Board 15 Year Thermal Warranty

Kooltherm Insulation Board 15 Year Limited Thermal Warranty

Warranty Registration Form 1708 - Interactive_Page_1

Kingspan Warranty Registration Form


BIM Objects / CAD Details

Click the link below to view our BIM Objects / CAD Details from ARCAT

Kingspan Insulation BIM Objects/CAD Details from ARCAT

Download Typical Wall Assemblies

Do you need assistance planning your project?

Our teams are dedicated to helping make the process as easy as possible and ensure you get the right materials for your needs.

Contact Us

Kingspan Insulation North America

Head Office & Sales Office – North America

Kingspan Insulation LLC

2100 Riveredge Parkway, Suite 175

Atlanta, Georgia



Call: +1(800) 241 4402

We use cookies on our website www.kingspan.com. To find out more about the cookies we use, or to change your cookie preferences i.e. to remove your consent to our use of certain categories of cookies, please visit our Cookie Policy & Control page.

Please click “Accept and close” to accept the use of cookies on our website. If you do not click “Accept and close” but continue to use this website: you thereby consent to the use of all Kingspan's cookies and third party cookies for the purposes of improving performance, improving functionality and audience measurement, in accordance with the terms laid out in our Cookie Policy & Control page; and we will assume that you have read and understood our Cookie Policy & Control page.

The Cookie Policy & Control and Website Privacy Notice were updated on 13 August 2018.