Materials:Foamular 404RB (Type 4)

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Materials:Foamular 404RB (Type 4)

Notice to the Reader:

The roofing assembly / material information published in the RCABC Roofing Practices Manual and offered below does NOT represent a complete set of the manufacturer’s data or specifications. The preparation of a detailed specification is the responsibility of the design authority.

Manufacturer: Owens Corning Canada
Accepted for RoofStar Guarantee Program
Date TBA
Product Summary

FOAMULAR® 404/604 and FOAMULAR® 404 RB/604 RB insulation is an extruded Type 4 CAN/ULC-S701-CAN/CGSB-51.20-M87 polystyrene rigid board insulation that is specifically designed to provide high quality, economical insulation for conventional roofs, with single-ply, two-ply or four-ply roof membranes.

The extruded board has smooth, high-density skins, shiplap or Square edges on four sides and a very dense closed-cell foam structure. Board size is 600 mm x 1200 mm (2' x 8'), in thickness ranging from 38 mm to 76 mm (1.5" to 3"). FOAMULAR® 404/604 and FOAMULAR® 404 RB/604 RB has one of the highest thermal resistance values, an aged (RSI value of 0.88 per 25 mm (R 5.0 per inch) for the FOAMULAR® 404/604 and (RSI value of 0.84 per 25 mm (R 4.75 per inch) for the FOAMULAR® 404 RB/604 RB. It has excellent water resistance characteristics (absorption of than 0.05%) and a high compressive strength of 275 kPa, 415 KPa, 690 KPa (40 psi, 60 psi and 100 psi).

Owens Corning developed the FOAMULAR® 404/604 boards with drainage channels around the board perimeter. Compared to a FOAMULAR® 400/600 board, the FOAMULAR® 404/604 board has the additional advantage of facilitating the flow of water infiltrated under the insulating boards to the waterproofing system's surface and drains.

The FOAMULAR® 404 RB/604 RB boards have as the additional feature of top side channels that help facilitate the flow of water to the system's drains.

FOAMULAR® 404/604 and FOAMULAR® 404 RB/604 RB is ideal for use in both standard and lightweight protected membrane roof systems and can be adhered or loosely applied. It is lightweight, easy to cut and simple to install year round.

Click below for the Technical Data Sheet (TBA).

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