Building a T-Wall Intersection
This focused course teaches BuildBlock’s recommended method for building a T-wall intersection — where an interior or intersecting wall meets a main wall — in single- and multi-story ICF construction. In about 30 minutes you’ll learn the layout, block cutting and overlap, reinforcement, and bracing that make a strong, code-ready intersection. Free to access; register for the quiz and certificate.
Who this course is for
ICF installers and contractors building structures with interior load-bearing walls or partition walls that tie into exterior ICF walls.
What you’ll learn
The course covers laying out and marking the footing, cutting the main-wall panel to the intersecting core width while preserving webs, overlapping courses to lock the intersection together, placing horizontal wall stiffeners and 90-degree L-bars course by course, and bracing both the intersection corners and the back side of the main wall before the pour.
Frequently asked questions
What is a T-wall in ICF construction? It’s the intersection where one ICF wall meets another to form a “T” — common where interior walls tie into exterior walls. It requires specific cutting, reinforcement, and bracing to stay strong and straight.
Do I need extra bracing at a T-wall? Yes. Brace the intersection corners on the courses that butt the main wall, and brace the back side of the main wall where blocks were cut. Always complete a pre-pour inspection first.
-
Consideration
-
Step 1: Prepare the Footing
-
Step 2: Install the First Course of Block
-
Step 3: Add the First Intersecting Course
-
Step 4: Install the First Course Rebar
-
Step 5: Set the Second Course of Block
-
Step 6: Add the Second Intersecting Course
-
Step 7: Install the Second Course of Rebar
-
Step 8: Brace the T-Intersection
-
Step 9: Brace the Back Side of the T
-
Building a T-Wall Intersection Review
-
Building a T-Wall