Attic Window Quilt Block Pattern

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An attic window quilt block is a beautiful and popular design that creates a three-dimensional effect, giving the impression of looking out of a window. Here are the steps to sew an attic window quilt block:

Materials you will need:

Fabric for the window frame (color of your choice)
Fabric for the window sash (color of your choice)
Fabric for the background (color of your choice)
Rotary cutter and mat
Ruler
Iron and ironing board
Sewing machine
Thread
Pins

Instructions:

Cut the fabric for the window frame into four strips, each 2.5 inches wide and the length of the block.
Cut the fabric for the window sash into two strips, each 2.5 inches wide and the length of the block.
Cut the fabric for the background into one square, measuring the finished size of the block plus 0.5 inches on each side. For example, if you want to make a 12-inch finished block, cut a 13-inch square.
Arrange the window frame strips around the edges of the background square to create a window frame. Place the strips right sides together with the background square and pin in place.
Sew the strips to the background square using a 1/4 inch seam allowance. Press the seam allowances towards the window frame.
Cut the center of the background square along the vertical and horizontal axis, creating four equal-sized smaller squares. Be sure not to cut through the window frame strips.
Fold the sash strips in half lengthwise and press to create a crease down the center.
Place the sash strips over the cut edges of the window frame, aligning the crease with the cut edge. Pin in place.
Sew the sash strips to the window frame using a 1/4 inch seam allowance. Press the seam allowances towards the sash strips.
Repeat steps 8 and 9 for the other two sides of the window frame.
Press the entire block, being careful not to stretch or distort the seams.

Your attic window quilt block is now complete! Repeat these steps to create additional blocks and assemble them into a quilt top.

How to Resize Quilt Blocks:

The first step in modifying any quilt block is to decide on the size of your finished quilt block. You can come to a decision based on a number of factors: doubling a pattern, cutting your pattern in half, or choosing the size based on your available fabric.

NOTE: When working from a pattern’s cutting instructions, make sure you remove the seam allowance before doubling or tripling the size. For instance, if your pattern calls for 3-1/2″ squares, first you’ll subtract the sum of the seam allowances (1/2″), double the finished block size (from 3″ to 6″), and add the seam allowance back in (1/2″). So, when all is said and done, you will cut a 6-1/2″ piece of fabric.

Resizing Square Blocks:

Square blocks are the easiest to resize. Simply add to your finished block measurement. For example, if you’d like your finished block to be a 4″ square, you’ll need to cut a 4-1/2″ square of fabric.

Resizing Rectangular Blocks:

Similarly to the square, for rectangle blocks, you’ll add to the length and width measurements of your finished block. If you’re doubling block that measures 3″ x 4″ in your quilt, you’ll cut a 6-1/2″ x 8-1/2″ rectangle of fabric.

Resizing Half-Square Triangle Blocks:

When you want to change the size of a Half-Square Triangle block, add 7/8″ to the desired finished block size. To make a 4″ finished block, you’d cut 4-7/8″ squares.

Resizing Quarter Square Triangle:

Since there are two cut lines and two seam lines in a Quarter-Square Triangle block you’ll need to add 1-1/4″ to the desired finished block size. For a finished block that’s 4″, you’d cut your squares 5-1/4″.

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