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How-to do an Uncommon ICF Angle on Site

May 1, 2012

Written By: Colin Showalter
Follow Colin on Twitter @Colin_PlastiFab

The Advantage ICF system has two typical corner blocks – 90 degree and 45 degree. So what do you do when your project calls for a 35 degree or a 120 degree angle? Well, let me explain.

The answer is simple. A simple miter joint can be created by bevel cutting standard straight blocks to accommodate any angle on site.

Step 1: Start from a corner block (45 or 90 degree) and work towards the uncommon corner requiring a miter joint.

Step 2: Bevel cut the foam on the edge of two standard straight blocks at the angle required to match the angle of the  to create the uncommon miter joint.

Step 3: Place pre-bent rebar going throughout the corner to match the rebar pattern.

Repeat steps 2 and 3 for all sequential rows of ICF block.

Step 4: Spray foam the gap if you feel the miter joint doesn’t fit tight. Use a low expansion spray foam.

Step 5: Strap the corner with Advantage multi-strap the same as you would with all the other corners.

Step 6: Build 2-2×6 lumber “L’s” or “strong backs” place these vertically on the back side of the miter jointed corner fastening them to the Advantage ICF ties.

Note: you may save time if you have multiple miter corners by building a miter box

Following these steps will allow you to build a monolithic concrete wall throughout any uncommon angle in your project. Be sure to continue to follow all local building codes.

Coming soon: When do you need a taper top block?

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