diff --git a/src/scripts/tutti/1_project-navigation.js b/src/scripts/tutti/1_project-navigation.js
index 1cf457eb..1496c1a3 100644
--- a/src/scripts/tutti/1_project-navigation.js
+++ b/src/scripts/tutti/1_project-navigation.js
@@ -146,15 +146,17 @@ function setJSONCookie(cookieToChange, cookieItem, cookieData){
 
 function containerResizeY(window_height){
 
-	var container_offset = $('#project-container').offset();
+	var project_container = document.getElementById('project-container');
+	var container_offset = project_container.offsetTop;
+	var nav_header_height = $('#project_nav-header').height();
 	var container_height = window_height - container_offset.top;
-	var container_height_wheader = window_height - container_offset.top - $('#project_nav-header').height();
-	var window_height_minus_nav = window_height - $('#project_nav-header').height() - 50; // 50 is global top navbar
+	var container_height_wheader = window_height - container_offset.top - nav_header_height;
+	var window_height_minus_nav = window_height - nav_header_height - 1; // 1 is border width
 
 	$('#project_context-header').width($('#project_context-container').width());
 
 	if ($(window).width() > 768) {
-		$('#project_nav-container, #project_tree, .project_split').css(
+		$('#project-container, #project_nav-container, #project_tree, .project_split').css(
 			{'max-height': window_height_minus_nav + 'px',
 			 'height': window_height_minus_nav + 'px'}
 		);