diff --git a/src/Foundation/InstalledSite.php b/src/Foundation/InstalledSite.php
index f3ace86b7..712c2ca4e 100644
--- a/src/Foundation/InstalledSite.php
+++ b/src/Foundation/InstalledSite.php
@@ -50,19 +50,9 @@ use Psr\Log\LoggerInterface;
 class InstalledSite implements SiteInterface
 {
     /**
-     * @var string
+     * @var array
      */
-    private $basePath;
-
-    /**
-     * @var string
-     */
-    private $publicPath;
-
-    /**
-     * @var string
-     */
-    private $storagePath;
+    private $paths;
 
     /**
      * @var array
@@ -74,10 +64,9 @@ class InstalledSite implements SiteInterface
      */
     private $extenders = [];
 
-    public function __construct($basePath, $publicPath, array $config)
+    public function __construct(array $paths, array $config)
     {
-        $this->basePath = $basePath;
-        $this->publicPath = $publicPath;
+        $this->paths = $paths;
         $this->config = $config;
     }
 
@@ -94,17 +83,6 @@ class InstalledSite implements SiteInterface
         );
     }
 
-    /**
-     * @param $storagePath
-     * @return static
-     */
-    public function setStoragePath($storagePath)
-    {
-        $this->storagePath = $storagePath;
-
-        return $this;
-    }
-
     /**
      * @param \Flarum\Extend\ExtenderInterface[] $extenders
      * @return InstalledSite
@@ -118,11 +96,9 @@ class InstalledSite implements SiteInterface
 
     private function bootLaravel(): Application
     {
-        $laravel = new Application($this->basePath, $this->publicPath);
+        $laravel = new Application($this->paths['base'], $this->paths['public']);
 
-        if ($this->storagePath) {
-            $laravel->useStoragePath($this->storagePath);
-        }
+        $laravel->useStoragePath($this->paths['storage']);
 
         $laravel->instance('env', 'production');
         $laravel->instance('flarum.config', $this->config);
@@ -188,7 +164,7 @@ class InstalledSite implements SiteInterface
         return new ConfigRepository([
             'view' => [
                 'paths' => [],
-                'compiled' => $app->storagePath().'/views',
+                'compiled' => $this->paths['storage'].'/views',
             ],
             'mail' => [
                 'driver' => 'mail',
@@ -199,18 +175,18 @@ class InstalledSite implements SiteInterface
                 'disks' => [
                     'flarum-assets' => [
                         'driver' => 'local',
-                        'root'   => $app->publicPath().'/assets',
+                        'root'   => $this->paths['public'].'/assets',
                         'url'    => $app->url('assets')
                     ],
                     'flarum-avatars' => [
                         'driver' => 'local',
-                        'root'   => $app->publicPath().'/assets/avatars'
+                        'root'   => $this->paths['public'].'/assets/avatars'
                     ]
                 ]
             ],
             'session' => [
                 'lifetime' => 120,
-                'files' => $app->storagePath().'/sessions',
+                'files' => $this->paths['storage'].'/sessions',
                 'cookie' => 'session'
             ]
         ]);
@@ -218,7 +194,7 @@ class InstalledSite implements SiteInterface
 
     private function registerLogger(Application $app)
     {
-        $logPath = $app->storagePath().'/logs/flarum.log';
+        $logPath = $this->paths['storage'].'/logs/flarum.log';
         $handler = new RotatingFileHandler($logPath, Logger::INFO);
         $handler->setFormatter(new LineFormatter(null, null, true, true));
 
@@ -233,8 +209,8 @@ class InstalledSite implements SiteInterface
         });
         $app->alias('cache.store', Repository::class);
 
-        $app->singleton('cache.filestore', function ($app) {
-            return new FileStore(new Filesystem, $app->storagePath().'/cache');
+        $app->singleton('cache.filestore', function () {
+            return new FileStore(new Filesystem, $this->paths['storage'].'/cache');
         });
         $app->alias('cache.filestore', Store::class);
     }
diff --git a/src/Foundation/Site.php b/src/Foundation/Site.php
index 4557d49a3..1d9b15921 100644
--- a/src/Foundation/Site.php
+++ b/src/Foundation/Site.php
@@ -16,32 +16,34 @@ use RuntimeException;
 
 class Site
 {
+    public static function fromDefaultBase($basePath)
+    {
+        return static::fromPaths([
+            'base' => $basePath,
+            'public' => "$basePath/public",
+            'storage' => "$basePath/storage",
+        ]);
+    }
     /**
      * @param array $paths
      * @return SiteInterface
      */
     public static function fromPaths(array $paths)
     {
-        if (! isset($paths['base'])) {
+        if (! isset($paths['base'], $paths['public'], $paths['storage'])) {
             throw new InvalidArgumentException(
-                'No base path given'
+                'Paths array requires keys base, public and storage'
             );
         }
 
-        if (! isset($paths['public'])) {
-            $paths['public'] = $paths['base'];
-        }
-
         date_default_timezone_set('UTC');
 
         if (static::hasConfigFile($paths['base'])) {
-            return (new InstalledSite(
-                $paths['base'],
-                $paths['public'],
-                static::loadConfig($paths['base'])
-            ))->extendWith(static::loadExtenders($paths['base']));
+            return (
+                new InstalledSite($paths, static::loadConfig($paths['base']))
+            )->extendWith(static::loadExtenders($paths['base']));
         } else {
-            return new UninstalledSite($paths['base'], $paths['public']);
+            return new UninstalledSite($paths);
         }
     }
 
diff --git a/src/Foundation/UninstalledSite.php b/src/Foundation/UninstalledSite.php
index 25776c9be..d8dd0bc95 100644
--- a/src/Foundation/UninstalledSite.php
+++ b/src/Foundation/UninstalledSite.php
@@ -32,24 +32,13 @@ use Psr\Log\LoggerInterface;
 class UninstalledSite implements SiteInterface
 {
     /**
-     * @var string
+     * @var array
      */
-    private $basePath;
+    private $paths;
 
-    /**
-     * @var string
-     */
-    private $publicPath;
-
-    /**
-     * @var string
-     */
-    private $storagePath;
-
-    public function __construct($basePath, $publicPath)
+    public function __construct(array $paths)
     {
-        $this->basePath = $basePath;
-        $this->publicPath = $publicPath;
+        $this->paths = $paths;
     }
 
     /**
@@ -66,15 +55,13 @@ class UninstalledSite implements SiteInterface
 
     private function bootLaravel(): Application
     {
-        $laravel = new Application($this->basePath, $this->publicPath);
+        $laravel = new Application($this->paths['base'], $this->paths['public']);
 
-        if ($this->storagePath) {
-            $laravel->useStoragePath($this->storagePath);
-        }
+        $laravel->useStoragePath($this->paths['storage']);
 
         $laravel->instance('env', 'production');
         $laravel->instance('flarum.config', []);
-        $laravel->instance('config', $config = $this->getIlluminateConfig($laravel));
+        $laravel->instance('config', $config = $this->getIlluminateConfig());
 
         $this->registerLogger($laravel);
 
@@ -109,15 +96,14 @@ class UninstalledSite implements SiteInterface
     }
 
     /**
-     * @param Application $app
      * @return ConfigRepository
      */
-    private function getIlluminateConfig(Application $app)
+    private function getIlluminateConfig()
     {
         return new ConfigRepository([
             'session' => [
                 'lifetime' => 120,
-                'files' => $app->storagePath().'/sessions',
+                'files' => $this->paths['storage'].'/sessions',
                 'cookie' => 'session'
             ]
         ]);
@@ -125,7 +111,7 @@ class UninstalledSite implements SiteInterface
 
     private function registerLogger(Application $app)
     {
-        $logPath = $app->storagePath().'/logs/flarum-installer.log';
+        $logPath = $this->paths['storage'].'/logs/flarum-installer.log';
         $handler = new StreamHandler($logPath, Logger::DEBUG);
         $handler->setFormatter(new LineFormatter(null, null, true, true));