Quilt As You Go Technique: 9 Steps From Block to Binding

Most tutorials show the finished blocks in a neat grid and skip the arithmetic that gets them there, which is why a first attempt often ends with gaps at the joins, a wavy edge or seams thick enough to bend a needle. None of that comes from poor stitching. It comes from three numbers set before the machine is switched on: the block size, the strip widths and the batting loft.

This guide works through the technique in nine steps with a worked example, then compares the joining methods in use, gives a table of block sizes against machine space, and lists the fixes for the four faults that turn up in almost every first quilt. It assumes a domestic machine with a 7 inch throat, cotton fabric and no longarm.

What Quilt As You Go Actually Changes

The old way of making a quilt asks you to assemble the whole top first, then layer it with batting and backing, then push all of that through the machine. On a queen size project that means roughly 20 pounds of fabric and wadding feeding through a 7 inch gap, and most of the strain lands in the shoulders. Quilting a block on its own removes the weight entirely, because the largest thing that ever goes under the needle is the block. What it changes is the order, not the result. Piecing, layering and quilting collapse into a single pass on each block, and every block leaves the machine finished except for its edges. The joining happens afterwards, block to block, with strips of fabric that frame each one.

What it costs is seams. Every join is a place where two blocks, two pieces of batting and two backing layers meet, and that stack can reach six layers of fabric. Handled badly it shows as a ridge across the front and a lump under the needle; handled well the join disappears behind a strip and reads as a design line.

The table below lists what the method gives and what it asks for, in the terms that matter on a first project.

Which Fabric Works and Which Does Not

Fabric choice matters more here than in ordinary patchwork, because the join is decorative. Medium weight woven cotton in prints and solids behaves best: it presses flat, takes a crease at the sashing and does not fray into the seam. Very loose weaves and flannels both work, but they need a slightly wider strip to cover the raw edges cleanly, and stretch fabrics should stay out of the project entirely. A fresh 80/12 needle suits the six layer joins, and the guide to sewing machine needle types explains why a heavier needle is not automatically the better one here. Plan the layout on paper before cutting anything, because a grid of blocks with sashing drawn between them tells you how many strips to cut, and the number of strips is the number of joins, which is the number of chances to introduce a gap.

What You Need Before the First Block

The shopping list is short, and most of it is already in a sewing room. What is not optional is the 1/4 inch foot, because every join in the method is built on a true quarter inch. A foot with a guide blade takes the guesswork out of it, and without one the blocks drift by an eighth of an inch each time, which compounds to half an inch across four joins.

A walking foot is the second purchase worth making. It feeds the top and bottom layers at the same rate, which is what stops the backing from shifting under the batting when the block is quilted. Straight line quilting on a block is possible without one, but the backing will pucker on the first attempt.

Thread colour is the one place to spend a minute. A neutral grey or cream disappears on most prints, and it is the colour that will show along every sashing line if the tension is wrong. Match it to the sashing rather than to the patchwork, because that is the fabric the stitching runs along.

Which Batting and Backing to Choose

Low loft batting, thin and flat, is the right default for this method. A block joined to its neighbour adds four layers at the seam, and every extra millimetre of loft multiplies across the join. High loft wadding also compresses unevenly, so the seams sink after the first wash and pull the sashing into a wave.

Cotton batting shrinks about 3 percent on the first wash and gives the crinkled, antique look many quilters want. Polyester keeps its shape and does not shrink, which keeps the blocks square but loses that texture. An 80/20 blend sits between the two and is the safest choice for a first project because it behaves predictably under the needle.

Backing should be the same weight as the patchwork and cut a full inch larger than the block on all sides, so it can be trimmed square after quilting. Pre-wash the backing, not the patchwork strips, because a backing that shrinks after the blocks are joined will pull the whole piece out of square.

Step 1: Pick a Block Size Your Machine Can Handle

Block size is set by two things: the space between the needle and the right hand side of the machine, and the ruler you already own. A machine with 7 inches of throat handles a 10 inch block comfortably, because the block runs through the gap turned on its side. A 14 inch block on the same machine means scrunching, and scrunching is what causes a wavy quilted line.

Ruler size is the practical constraint most guides ignore. Cutting blocks to 10 inches means trimming to a line you can actually see, and a 6 by 24 inch ruler covers a 10 inch block in one pass. Cutting to 12 1/2 inches means two passes and a second check with a square, which is one more chance to cut the block slightly out of true.

Keep one size for the whole project on the first attempt. Mixed sizes are perfectly possible but each size needs its own sashing lengths, and the arithmetic multiplies fast. A quilt of 30 blocks at 10 inches gives a 60 by 50 inch lap quilt with five blocks across and six down, minus the sashing width.

Step 2: Layer and Baste a Single Block

Cut the backing 1 inch larger than the finished block on every side, and the batting the same size as the backing. Centre the patchwork on top, then baste the three layers together around the edge with a long stitch or a few pins placed inside the seam allowance, so nothing has to be removed from the middle of the block later.

The layers are stacked patchwork on top, batting in the middle, backing underneath with its right side facing down. Get this order wrong and the raw edges of the backing end up on the front of the finished piece, which cannot be fixed without unpicking the quilting.

Press the stack rather than pinning it flat. A warm iron with no steam, held for a few seconds on each layer before the basting, is enough to make the fabric grip the batting, and that grip is what keeps the backing from shifting during the first quilting line. Spray baste is quicker but makes the needle tacky, so use it sparingly if at all.

The backing size is worth cutting generously on the first attempt. An extra inch on each side costs a little fabric and gives room to trim after quilting, which is where blocks lose their square. Batting cut to the exact block size leaves nothing to hold while the quilting pulls the layers inwards, and that is why so many first blocks finish a little small.

Step 3: Piece and Quilt the Block in One Pass

Start with the first strip right side up across the centre of the block, then lay the second strip on top of it, right side down, and sew down the edge with a quarter inch seam through all three layers. Open the second strip and press. That single seam has joined two strips of patchwork and anchored them to the batting and backing, and every seam after it does the same.

1. Place the first strip right side up, running the full length of the block.
2. Lay the next strip right side down on its edge and stitch a quarter inch seam through all three layers.
3. Flip the strip open, press it away from the seam, and check the backing underneath has not puckered.
4. Add the next strip on the opposite side, then work outwards until the block is covered.
5. Trim the overhanging strips flush with the batting.
6. Quilt any remaining open areas, then square the block.

The quilting that happens in these seams is enough on its own for a small block, because the strips are narrow. Wider strips, or a block built from large squares, leave areas that need a second pass of quilting after piecing, and that pass is what the walking foot is for.

Sew a set of lines across one block before you commit to the spacing for the rest. A finger width apart is a safe default on a 10 inch block, and it is close enough that the batting never has room to migrate inside the layers.

Quilting design is a separate decision from construction, and on this method it is made per block rather than across the whole top. Parallel lines set 1 inch apart give a modern grid. A diagonal cross on each block reads as a continuous pattern once the sashing joins them. Free motion work is possible but harder on a small square, because there is less room to move the fabric without hitting the side of the throat. Textured surfaces built from layered fabric behave differently, and the guide to making a chenille quilt covers the cutting channels that create them.

Step 4: Square the Block

Trimming is the step beginners skip and the one that decides whether the joins line up. Every block needs to finish at the same size, exactly, and that means measuring the smallest dimension of the four edges and cutting all four to it. A block that started at 10 inches and finished at 9 7/8 is now a 9 7/8 inch block for the rest of the project.

Check the three layers at the same time. The backing should extend evenly past the batting on all four sides, or the join will expose a sliver of wadding. If the quilting has pulled the block out of square, damp it, press it back to shape and let it dry flat before trimming, rather than cutting to a size that loses a corner of the patchwork.

Stack the squared blocks as they come off the mat and keep them in order. Number them on a scrap of paper pinned to the corner, because the layout that looked obvious on the design wall is impossible to reconstruct after 30 blocks have been shuffled.

Step 5: Cut the Joining Strips

Two strips are needed for every join: a narrow one that becomes the visible sashing on the front, and a wider one that folds over the raw edges on the back. The width relationship is what makes the join work, and it is the number beginners get wrong by a quarter inch, which is enough to leave a gap.

Cut the front strip 1 inch wide and the back strip 2 inches wide, both half an inch longer than the block edge so they can be trimmed after stitching. Press the 2 inch strip in half lengthwise, wrong sides together, with a crisp crease down the centre; that crease is the line the strip will fold along when it covers the seam.

Wider back strips are the fix for a bulky join. If the blocks are quilted heavily or the batting is thicker than expected, a 2 inch strip will not quite reach across the raw edges, and a 2 1/2 inch strip will. Cut a few extras before starting rather than stopping halfway through the assembly.

Step 6: Join Two Blocks From the Back

Lay the first finished block face down and place the folded edge of the 2 inch strip along one edge, raw edges aligned, so the fold points inwards across the block. Stitch a quarter inch from the raw edge through the strip and the block.

Then but the second block against the first, edge to edge, with its back facing up, and stitch the other side of the strip to it in the same way. The two blocks should now be joined with no gap and no overlap, and the strip should be flat against both backs, running across the join.

Two checks make the difference between a clean join and a re-stitch. First, the stitch line on the second block must be the same distance from its edge as the first, so measure rather than trust the foot guide on the second pass. Second, the blocks must butt, not overlap: if the edge of one sits on top of the other, the quilt will be short by a quarter inch per join and the rows will not line up.

Step 7: Cover the Join on the Front

Turn the pair over. The folded 2 inch strip is now on the wrong side, covering the raw edges of both blocks. Fold it over onto the front so that its fold sits on the join line, press it flat, and stitch down both long edges close to the fold.

That topstitching is what finishes the join and what a reader will see from across a room, so it is worth setting the stitch length slightly longer than the construction seam and using a thread that matches the strip rather than the patchwork. A quarter inch from each folded edge is a good default; closer to the fold gives a narrow, sharp line, and further away gives a softer, wider band. If the raw edges under the strip still bother you, the same finishing logic as finishing raw edges of fabric explains which edge treatments survive washing.

Press the join once from the front and once from the back, with a pressing cloth if the strip is dark. The strip will want to cup if it has been stitched too tightly, and a firm press while it is still warm is what flattens it back out.

Step 8: Join the Rows

Join blocks into rows first, then join the rows to each other with the same strip method. Working row by row keeps the project manageable, and it means a mistake costs one row rather than the whole top.

1. Lay out all the blocks in the final arrangement before stitching anything.
2. Join each row left to right, adding one block at a time.
3. Press each row flat and trim the strip ends flush with the row.
4. Join row one to row two along the long edge, using the same front and back strips.
5. Continue until every row is joined, then add a border strip around the outside.

Check the total width after every two rows. A quilt that started at 50 inches and has grown to 51 has stretched somewhere, usually on a long join where the blocks were fed without support. Holding the weight of a growing row with your hands, rather than letting it hang, is what keeps the measurement stable.

Step 9: Bind the Quilt

The outer edge is finished with ordinary quilt binding, cut 2 1/2 inches wide, joined into one continuous length and stitched to the front with a quarter inch seam, then folded to the back and stitched down by hand or machine. Because every block is already quilted, the edge is stable and the binding goes on in a single session.

Miter the corners rather than folding them square. A square fold leaves a lump at each corner that is visible through the binding and collects lint, and a miter takes about thirty seconds more per corner.

Add a label before the binding closes. A small square of fabric with the date, the batting used and the washing instructions, stitched to the bottom corner of the back, is the difference between a quilt that can be repaired in ten years and one that cannot.

Common Mistakes and How They Look

A gap between blocks is the most common fault and almost always comes from a back strip that was too narrow for the loft, not from a bad seam. A ridge across the front is the opposite problem: the raw edges were not trimmed before the strip went on, so the strip covers a step instead of a flat join. A wavy quilt is nearly always the backing shifting during quilting, which a walking foot prevents.

The one mistake that cannot be repaired after the fact is joining blocks of different sizes. Everything else can be unpicked and re-stitched in twenty minutes, and the sashing makes that easier than it sounds, because the strip hides the evidence of a second attempt.

How to Wash and Store the Finished Quilt

Wash in cold water on a gentle cycle with a colour catcher, and skip the dryer entirely. Heat is what shrinks cotton batting unevenly and what makes a sashing line pucker, because the strip and the blocks behind it shrink at different rates. Line dry flat, or on a rail with the weight spread, and press the joins once it is dry.

Store folded rather than hanging, and refold along a different line every few months. A quilt hung on a rail for years pulls on the top edge, and a quilt folded on the same crease for years wears a line into the batting that never presses out. A wall display needs different support altogether, and the guide to hanging a quilt on the wall covers sleeves and hanging systems that spread the load.

Handmade pieces also deserve a record. Photograph the finished piece flat, note the block size, the batting and the strip widths, and keep the note with the pattern. The second quilt in the same method takes a third less time, and the notes are what make that possible.

Frequently Asked Questions

Conclusion

Quilting each block on its own turns a heavy project into a series of small ones, and the only real skill it asks for is consistency: the same block size, the same quarter inch, the same strip width on every join. Get those three right and the sashing lines do the rest of the work.

In Mithu’s experience running this method with beginners, the people who finish a lap quilt are the ones who square every block as it comes off the mat and keep the finished ones in a numbered stack. The sashing forgives a slightly wavy quilting line. It never forgives a block that is an eighth of an inch out.

Start with six blocks and make a table runner before committing to a bed quilt. Six blocks is two rows of three, which is enough to practise the join four times and enough to see the stained glass effect the sashing creates, and the guide to sewing mitred corners will help when the binding goes on.

What will you make with your first six blocks?

About This Guide

This guide was tested by Mithu, who built blocks in cotton prints and solids, quilted them with a walking foot on a 7 inch throat machine, and joined 30 blocks into a lap quilt with 1 inch and 2 inch sashing strips.

All images in this article were created using AI.