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Welcome to the Installation of ICFs and Benefits blog by NUDURA Insulated Concrete Forms. Here you will learn more about ICF installations and benefits. Be sure to check back regularly!

Installation Part 2: Build to the Roof

by NUDURA Blogger | Sep 06, 2016

In our last blog, we discussed how to get started on an ICF installation. If you’d like a more in-depth look, check out the NUDURA installer training courses we may have in your area at

Restart reinforcing: After the installer has addressed openings for windows and doors, stacking will continue, with reinforcing steel placed every course or every other course depending upon what engineer or structural tables under International Residential Code will allow.

Reach the top: Many ICF manufacturers will provide an alignment system that provides scaffold access for installers to work on the top part of the wall. This system also helps toalign the wall once the concrete is poured inside.School 098

The alignment system basically consists of a vertical box channel, a scaffold locking platform, and a brace pull or turn buckle brace that projects diagonally downward and inward at a 45 degree angle to the inside build of the wall. It is drift  pinned into the ground or screwed into the slab to anchor it firmly in position.

The box channel is temporarily screwed into the web fastening strips to hold each of the braces firmly in position. The braces are positioned at regular intervals, usually four or five inches on center along the wall. Scaffold planks are laid across each of these to be able to walk along the wall.

00540021Insert vertical steel: Once the installer reaches where the wall is projected to finish on top, vertical steel is inserted as per specification by the engineer, architect or structural table. It is woven in between successive courses of horizontal steel that have been previously placed in the wall. Usually, the steel will rest right next to the web so it’s held firmly in position both longitudinally and laterally within the wall.

Pour: Concrete is poured into the wall from the scaffold in four-foot lifts, accordant with American Concrete Institute (ACI) regulations. Those lifts are poured one on top of the other – about an hour apart – to ensure the concrete below sets up properly. During pouring, the concrete is vibrated using a mechanical vibrator (1-1.25 inch diameter) plunged into the wall quickly and then withdrawn to ensure the concrete is properly consolidated and reaches maximum strength.

Up a floor or to the roof: Preparations that need to be made for attaching another floor are completed before the concrete is poured. If, however, the ICF will be a roof connection with a standard plate, the installer will ensure the concrete is flat in preparation for that plate to be laid on top.

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