diff --git a/src/util/qpolygon-utils.js b/src/util/qpolygon-utils.js
index 7a20a2b4..1599905d 100644
--- a/src/util/qpolygon-utils.js
+++ b/src/util/qpolygon-utils.js
@@ -2732,6 +2732,7 @@ const setGableRoof = (polygon, ridge, hip1, hip2, offset, canvas) => {
   if (ridge.direction === 'top') {
     if (ridge.y1 > y1 && ridge.y2 > y1) {
       offset = Math.abs(ridge.y1 - y1) - offset
+      offset = offset < 0 ? 0 : offset
       ridge.set({
         x1: ridge.x1,
         y1: ridge.y1,
@@ -2763,6 +2764,7 @@ const setGableRoof = (polygon, ridge, hip1, hip2, offset, canvas) => {
     }
     if (ridge.y1 < y1 && ridge.y2 < y1) {
       offset = Math.abs(ridge.y2 - y1) - offset
+      offset = offset < 0 ? 0 : offset
       ridge.set({
         x1: ridge.x1,
         y1: ridge.y1 - offset,
@@ -2795,6 +2797,7 @@ const setGableRoof = (polygon, ridge, hip1, hip2, offset, canvas) => {
   if (ridge.direction === 'bottom') {
     if (ridge.y1 > y1 && ridge.y2 > y1) {
       offset = Math.abs(ridge.y1 - y1) - offset
+      offset = offset < 0 ? 0 : offset
       ridge.set({
         x1: ridge.x1,
         y1: ridge.y1 - offset,
@@ -2825,6 +2828,7 @@ const setGableRoof = (polygon, ridge, hip1, hip2, offset, canvas) => {
     }
     if (ridge.y1 < y1 && ridge.y2 < y1) {
       offset = Math.abs(ridge.y2 - y1) - offset
+      offset = offset < 0 ? 0 : offset
       ridge.set({
         x1: ridge.x1,
         y1: ridge.y1,
@@ -2858,6 +2862,7 @@ const setGableRoof = (polygon, ridge, hip1, hip2, offset, canvas) => {
   if (ridge.direction === 'right') {
     if (ridge.x1 > x1 && ridge.x2 > x1) {
       offset = Math.abs(ridge.x1 - x1) - offset
+      offset = offset < 0 ? 0 : offset
       ridge.set({
         x1: ridge.x1 - offset,
         y1: ridge.y1,
@@ -2888,6 +2893,7 @@ const setGableRoof = (polygon, ridge, hip1, hip2, offset, canvas) => {
     }
     if (ridge.x1 < x1 && ridge.x2 < x1) {
       offset = Math.abs(ridge.x2 - x1) - offset
+      offset = offset < 0 ? 0 : offset
       ridge.set({
         x1: ridge.x1,
         y1: ridge.y1,
@@ -2920,6 +2926,7 @@ const setGableRoof = (polygon, ridge, hip1, hip2, offset, canvas) => {
   if (ridge.direction === 'left') {
     if (ridge.x1 > x1 && ridge.x2 > x1) {
       offset = Math.abs(ridge.x1 - x1) - offset
+      offset = offset < 0 ? 0 : offset
       ridge.set({
         x1: ridge.x1,
         y1: ridge.y1,
@@ -2950,6 +2957,7 @@ const setGableRoof = (polygon, ridge, hip1, hip2, offset, canvas) => {
     }
     if (ridge.x1 < x1 && ridge.x2 < x1) {
       offset = Math.abs(ridge.x2 - x1) - offset
+      offset = offset < 0 ? 0 : offset
       ridge.set({
         x1: ridge.x1 - offset,
         y1: ridge.y1,