Kooltherm K9
Internal Insulation Board

Kooltherm K9 Concrete

Internal Insulation for Basement, Crawl Space and Attic Wall Applications

Kingspan Kooltherm K9 Internal Insulation Board is a premium performance insulation product, used for basement, crawlspace and attic wall applications.
  • Premium performance rigid thermoset insulation
  • R-value of 17 on 2 in
  • Higher R-value per inch than any commonly used insulation
  • Negligible smoke developed
  • ASTM E 84 rating of 5/5 (flame-smoke)
  • Unaffected by air infiltration
  • NFPA 286 compliant for exposed applications
  • Easy to handle and install
  • Manufactured with a blowing agent that has zero ODP, low GWP, HCFC and CFC free

Product Information

Property Test Method Result
Nominal Thickness
(in / mm)
1.57 / 40
1.97 / 50
2.36 / 60
2.95 / 75
3.94 / 100
Standard Dimensions
Width (in / mm)
Length (in / mm)
47.244 / 1200
89.370 / 2270
Compressive Strength, Min. 
ASTM D1621 17.5
Water Absorption, Max.
(% by volume)
ASTM C209 1.21
Density, Min.
ASTM D1622 2.0
Closed Cell Content
(% of cells closed)
ASTM D6226 94.67
Air Permeance
(L/S/m2) / (cfm/ft²)
ASTM E2178 0.001 / 0.000
Water Vapor Permeance, Max.1
ASTM E96 0.79
Fire & Smoke
Flame Spread
Smoke Developed
ASTM E 84 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)
1.18 30 10.0
1.57 40 13.5
1.97 50 16.5
2.36 60 20.0
2.76 70 23.5
2.95 75 25.0
3.15 80 26.5
3.54 90 30.00
3.74 95 30
3.94 100 33.5
Kooltherm K9_Internal Insulation Board_Brochure_US_1909_Page_1

Kooltherm K9 Internal Insulation Board Brochure

Kingspan Kooltherm K9 Internal Insulation Board_Submittal_US_1909.int_Page_1

Kooltherm K9 Internal Insulation Board Submittal

TER 1601-07

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

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

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