KORE EPS is the ideal insulation solution for a variety of flat roof applications, including warm roofs, inverted flat roofs, metal deck roofs and tapered roofs.
Available in a range of thicknesses with a very high compressive strength with low water absorption properties.
Cost-optimal and high-performance Expanded Polystyrene ensures compliance with Part L 2021 while offering a budget-friendly option compared to PIR & XPS.
Ideal for use on both residential and commercial applications, new build or retrofit, and is tailored to the requirements of your flat roof project.
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Meet & Exceed Building Regulations
KORE Flat Roof is manufactured to the needs of your flat roof project, easily meeting or exceeding Part L 2021 (Conservation of Fuel & Energy – Dwellings & Part L 2021 Buildings Other Than Dwellings).
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Completely Water Resistant
KORE Flat Roof manufactured with EPS offers low water absorption properties, protecting against freezing
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Suitable for a Wide Range of Flat Roof Applications
KORE Flat Roof can be used in a variety of applications including inverted flat roofs, standard flat roofs, warm flat roofs, tapered roofs, profiled sheet roofing and cut to fall tapered roof insulation
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Sustainable & Easy to Work With
KORE EPS is suitable for residential and commercial applications, offers a third-party verified EPD and is lightweight, quick and easy to install
TECHNICAL INFORMATION
Download the KORE Flat Roof Insulation Product Leaflet >>
Contact our sales or technical department for – U-Value Calculations – Condensation Risk Analysis – Product Performance – DOP Certificates
Fully certified
- Manufactured to IS EN 13163:2012+A2:2016 and in an ISO 9001:2015 QMS certified facility
- Full Declaration of Performance Certificates available
- Third-party Environmental Product Declaration certified by IGBC and EPD Ireland
KORE Flat Roof in Detail
This detail shows a typical warm flat roof construction with 100mm KORE EPS100 White. The structural deck may differ depending on project specifications. For warm roofs, the waterproofing membrane must always be placed on the top of the insulation, and the vapour control layer must always be placed on the warm side of the roof (below the insulation).
KORE’s technical team is always available to help answer any questions and provide guidance for your project.
Flat Roof Applications with EPS
Standard Warm Roof
KORE Flat Roof EPS for warm roof applications is installed over the structural roof deck and the air and vapour control layer (AVCL) and immediately below the weatherproof covering. The roof deck is maintained at or close to the building’s internal temperature throughout the year, and liquid applied waterproofing system often act as the external finish.
Inverted Roof – Shiplap Sheet
KORE Flat Roof Inverted Roof Boards are suitable for use on inverted flat roofs or zero-pitched untrafficked roofs, and balconies and terraced roofs subject to pedestrian access only, with gravel ballast or paved finish on a suitably designed timber, concrete, or metal structural deck and appropriate fully supported waterproofing system. KORE Inverted Flat Roof Boards are also suitable for use with a green roof finish.
Metal Roof Deck – Corrugated Sheet
KORE EPS Flat Roof Corrugated Sheets are designed to match the shape of metal sandwich panels, metal or concrete roof decks, ICF wall blocks, concrete floor panels and more. These bespoke boards are profiled to suit specific shapes and are available in a range of densities.
Tapered Flat Roof – Tapered Sheet
KORE EPS for tapered flat roof reduce or eliminate the amount of standing water or ponding on the membrane when the roof deck does not or cannot provide adequate slope. By incorporating tapered insulation into a flat roof, KORE EPS allows appropriate water channelling to drainage outlets and reduces the risk of standing water. It also negates the requirement of a structural fall, which helps reduce the overall cost of the roof and installation time.
Meet KORE Flat Roof
|
Grade |
EPS100 Silver |
EPS100 White |
EPS200 White |
EPS300 White |
|
Reaction to fire |
Class E |
Class E |
Class E |
Class E |
|
Thermal conductivity |
0.031 |
0.036 |
0.033 |
0.032 |
|
Maximum compressive strength at 10% |
CS (10) 100 |
CS (10) 100 |
CS (10) 200 |
CS (10) 300 |
|
Minimum bending strength |
BS150 |
BS150 |
BS250 |
BS450 |
|
Water vapour diffusion factor |
30 to 70 |
30 to 70 |
40 to 100 |
40 to 100 |
|
Long term water absorption by partial immersion |
WL(P)i 0.2kg/m² |
WL(P)i 0.2kg/m² |
WL(P)i 0.2kg/m² |
WL(P)i 0.1kg/m² |
|
Squareness |
S(5) |
S(5) |
S(5) |
S(2) |
|
Width (mm) |
1200 |
1200 |
1200 |
1200 |
|
Length (mm) |
1200-1800 |
1200-1800 |
1200-1800 |
1200-1800 |
|
Lap Jointed Edge |
n/a |
n/a |
20 |
20 |
 |
Warm Roof with Waterproofing |
|||
|
U-Value |
EPS100 Silver |
EPS100 White |
EPS200 White |
EPS300 White |
|
0.20 |
130mm |
150mm |
140mm |
140mm |
|
0.18 |
150mm |
170mm |
160mm |
150mm |
|
0.16 |
170mm |
200mm |
180mm |
170mm |
|
0.14 |
190mm |
240mm |
210mm |
200mm |
Examples of Flat Roof Insulation Boards
BOARD TYPE 1 – SHIPLAPPED 2 SIDES
BOARD TYPE 2 – SHIPLAPPED 4 SIDES
BOARD TYPE 3 – CORRUGATED BOARD
BOARD TYPE 4 – TAPERED SHEET
