diff --git a/include/sway/config.h b/include/sway/config.h
index cabc9cf5..d84eef69 100644
--- a/include/sway/config.h
+++ b/include/sway/config.h
@@ -761,6 +761,10 @@ void translate_keysyms(struct input_config *input_config);
 
 void binding_add_translated(struct sway_binding *binding, list_t *bindings);
 
+int config_get_blur_size();
+
+bool config_should_parameters_blur();
+
 /* Global config singleton. */
 extern struct sway_config *config;
 
diff --git a/sway/config.c b/sway/config.c
index 85e53679..04c75171 100644
--- a/sway/config.c
+++ b/sway/config.c
@@ -1084,3 +1084,11 @@ void translate_keysyms(struct input_config *input_config) {
 	sway_log(SWAY_DEBUG, "Translated keysyms using config for device '%s'",
 			input_config->identifier);
 }
+
+int config_get_blur_size() {
+	return pow(2, config->blur_params.num_passes) * config->blur_params.radius;
+}
+
+bool config_should_parameters_blur() {
+	return config->blur_params.radius > 0 && config->blur_params.num_passes > 0;
+}
diff --git a/sway/desktop/output.c b/sway/desktop/output.c
index b3107f96..3b4a5303 100644
--- a/sway/desktop/output.c
+++ b/sway/desktop/output.c
@@ -746,13 +746,15 @@ static void damage_child_views_iterator(struct sway_container *con,
 void output_damage_whole_container(struct sway_output *output,
 		struct sway_container *con) {
 	int shadow_sigma = con->shadow_enabled ? config->shadow_blur_sigma : 0;
+	int blur_size = con->blur_enabled ? config_get_blur_size() : 0;
+	int effect_size = MAX(shadow_sigma, blur_size);
 
 	// Pad the box by 1px, because the width is a double and might be a fraction
 	struct wlr_box box = {
-		.x = con->current.x - output->lx - 1 - shadow_sigma,
-		.y = con->current.y - output->ly - 1 - shadow_sigma,
-		.width = con->current.width + 2 + shadow_sigma * 2,
-		.height = con->current.height + 2 + shadow_sigma * 2,
+		.x = con->current.x - output->lx - 1 - effect_size,
+		.y = con->current.y - output->ly - 1 - effect_size,
+		.width = con->current.width + 2 + effect_size * 2,
+		.height = con->current.height + 2 + effect_size * 2,
 	};
 	scale_box(&box, output->wlr_output->scale);
 	if (wlr_damage_ring_add_box(&output->damage_ring, &box)) {
diff --git a/sway/desktop/render.c b/sway/desktop/render.c
index 1497fac4..9b0d2e7c 100644
--- a/sway/desktop/render.c
+++ b/sway/desktop/render.c
@@ -50,13 +50,6 @@ struct decoration_data get_undecorated_decoration_data() {
 	};
 }
 
-int get_blur_size() {
-	return pow(2, config->blur_params.num_passes) * config->blur_params.radius;
-}
-
-bool should_parameters_blur() {
-	return config->blur_params.radius > 0 && config->blur_params.num_passes > 0;
-}
 
 // TODO: contribute wlroots function to allow creating an fbox from a box?
 struct wlr_fbox wlr_fbox_from_wlr_box(struct wlr_box *box) {
@@ -250,7 +243,7 @@ struct fx_framebuffer *get_main_buffer_blur(struct fx_renderer *renderer, struct
 	pixman_region32_copy(&damage, original_damage);
 	wlr_region_transform(&damage, &damage, transform, monitor_box.width, monitor_box.height);
 
-	wlr_region_expand(&damage, &damage, get_blur_size());
+	wlr_region_expand(&damage, &damage, config_get_blur_size());
 
 	// Initially blur main_buffer content into the effects_buffers
 	struct fx_framebuffer *current_buffer = &renderer->main_buffer;
@@ -400,7 +393,7 @@ static void render_surface_iterator(struct sway_output *output,
 	deco_data.corner_radius *= wlr_output->scale;
 
 	// render blur (view->surface == surface excludes blurring subsurfaces)
-	if (deco_data.blur && should_parameters_blur() && view->surface == surface) {
+	if (deco_data.blur && config_should_parameters_blur() && view->surface == surface) {
 		pixman_region32_t opaque_region;
 		pixman_region32_init(&opaque_region);
 
@@ -809,7 +802,7 @@ static void render_saved_view(struct sway_view *view, struct sway_output *output
 		deco_data.corner_radius *= wlr_output->scale;
 
 		// render blur
-		if (deco_data.blur && should_parameters_blur()) {
+		if (deco_data.blur && config_should_parameters_blur()) {
 			struct wlr_gles2_texture_attribs attribs;
 			wlr_gles2_texture_get_attribs(saved_buf->buffer->texture, &attribs);
 
@@ -1876,13 +1869,11 @@ void output_render(struct sway_output *output, struct timespec *when,
 		render_unmanaged(output, damage, &root->xwayland_unmanaged);
 #endif
 	} else {
+		pixman_region32_copy(&extended_damage, damage);
+
 		bool should_render_blur = should_workspace_have_blur(workspace);
 		if (should_render_blur) {
-			wlr_region_expand(damage, damage, get_blur_size());
-			pixman_region32_copy(&extended_damage, damage);
-			wlr_region_expand(damage, damage, get_blur_size());
-		} else {
-			pixman_region32_copy(&extended_damage, damage);
+			wlr_region_expand(damage, damage, config_get_blur_size());
 		}
 
 		float clear_color[] = {0.25f, 0.25f, 0.25f, 1.0f};
@@ -1900,7 +1891,7 @@ void output_render(struct sway_output *output, struct timespec *when,
 			&output->layers[ZWLR_LAYER_SHELL_V1_LAYER_BOTTOM]);
 
 		// check if the background needs to be blurred
-		if (should_parameters_blur() && renderer->blur_buffer_dirty && should_render_blur) {
+		if (config_should_parameters_blur() && renderer->blur_buffer_dirty && should_render_blur) {
 			pixman_region32_union_rect(damage, damage, 0, 0, width, height);
 			render_monitor_blur(output, damage);
 		}