diff --git a/src/lib/writeTemplate.ts b/src/lib/write-template.ts
similarity index 78%
rename from src/lib/writeTemplate.ts
rename to src/lib/write-template.ts
index fd390a48..f85b6b18 100644
--- a/src/lib/writeTemplate.ts
+++ b/src/lib/write-template.ts
@@ -7,7 +7,12 @@ import { copyFileSync, existsSync, mkdirSync, writeFileSync } from 'fs';
  * @param html The HTML to write
  * @param css The CSS to write
  */
-const writeTemplate = (template: string, html: string, css: string) => {
+const writeTemplate = (
+	template: string,
+	type: 'ssr' | 'csr',
+	html: string,
+	css: string,
+) => {
 	const outDir = `build-static/${template}`;
 
 	mkdirSync(outDir, { recursive: true });
@@ -15,7 +20,7 @@ const writeTemplate = (template: string, html: string, css: string) => {
 	writeFileSync(`${outDir}/index.html`, html, 'utf-8');
 	writeFileSync(`${outDir}/style.css`, css, 'utf-8');
 
-	const adJSON = `src/templates/csr/${template}/ad.json`;
+	const adJSON = `src/templates/${type}/${template}/ad.json`;
 
 	if (existsSync(adJSON)) {
 		copyFileSync(adJSON, `${outDir}/ad.json`);
diff --git a/src/routes/csr/[template].json.ts b/src/routes/csr/[template].json.ts
index 07a031d3..ad4c8b8c 100644
--- a/src/routes/csr/[template].json.ts
+++ b/src/routes/csr/[template].json.ts
@@ -4,7 +4,7 @@ import { marked } from 'marked';
 import { getCommit } from '$lib/git';
 import { build } from '$lib/rollup';
 import { getProps } from '$lib/svelte';
-import { writeTemplate } from '$lib/writeTemplate';
+import { writeTemplate } from '$lib/write-template';
 
 const github = 'https://github.com/guardian/commercial-templates/blob';
 
@@ -59,7 +59,7 @@ export const GET: RequestHandler = async ({ params }) => {
 		? marked.parse(readFileSync(`${dir}/README.md`, 'utf-8'))
 		: `<p><em>no description provided</em></p>`;
 
-	writeTemplate(template, html, css);
+	writeTemplate(template, 'csr', html, css);
 
 	return {
 		body: {
diff --git a/src/routes/ssr/[template].json.ts b/src/routes/ssr/[template].json.ts
index a9dd039e..87bdecbe 100644
--- a/src/routes/ssr/[template].json.ts
+++ b/src/routes/ssr/[template].json.ts
@@ -6,7 +6,7 @@ import type { OutputAsset, OutputChunk } from 'rollup';
 import { getCommit } from '$lib/git';
 import { build } from '$lib/rollup';
 import { getProps } from '$lib/svelte';
-import { writeTemplate } from '$lib/writeTemplate';
+import { writeTemplate } from '$lib/write-template';
 
 type Output = {
 	html?: string;
@@ -100,7 +100,7 @@ export const GET: RequestHandler = async ({ params }) => {
 		? marked.parse(readFileSync(`${dir}/README.md`, 'utf-8'))
 		: `<p><em>no description provided</em></p>`;
 
-	writeTemplate(template, html, css);
+	writeTemplate(template, 'ssr', html, css);
 
 	return {
 		body: {