diff --git a/gucc/include/gucc/bootloader.hpp b/gucc/include/gucc/bootloader.hpp
index 340e27c..49f4dc5 100644
--- a/gucc/include/gucc/bootloader.hpp
+++ b/gucc/include/gucc/bootloader.hpp
@@ -56,9 +56,24 @@ struct GrubConfig final {
     std::optional<bool> disable_os_prober{};
 };
 
-// Generate grub_config into string
+struct GrubInstallConfig final {
+    bool is_efi{};
+    bool do_recheck{};
+    bool is_removable{};
+    bool is_root_on_zfs{};
+    std::optional<std::string> efi_directory{};
+    std::optional<std::string> bootloader_id{};
+};
+
+// Generate grub config into string
 auto gen_grub_config(const GrubConfig& grub_config) noexcept -> std::string;
 
+// Writes grub config to file on the system
+auto write_grub_config(const GrubConfig& grub_config, std::string_view root_mountpoint) noexcept -> bool;
+
+// Installs and configures grub on system
+auto install_grub(const GrubConfig& grub_config, const GrubInstallConfig& grub_install_config, std::string_view root_mountpoint) noexcept -> bool;
+
 // Installs & configures systemd-boot on system
 auto install_systemd_boot(std::string_view root_mountpoint, std::string_view efi_directory, bool is_volume_removable) noexcept -> bool;
 
diff --git a/gucc/src/bootloader.cpp b/gucc/src/bootloader.cpp
index d02b581..c3c783c 100644
--- a/gucc/src/bootloader.cpp
+++ b/gucc/src/bootloader.cpp
@@ -1,4 +1,5 @@
 #include "gucc/bootloader.hpp"
+#include "gucc/file_utils.hpp"
 #include "gucc/initcpio.hpp"
 #include "gucc/io_utils.hpp"
 #include "gucc/string_utils.hpp"
@@ -219,4 +220,60 @@ auto install_systemd_boot(std::string_view root_mountpoint, std::string_view efi
     return true;
 }
 
+auto write_grub_config(const GrubConfig& grub_config, std::string_view root_mountpoint) noexcept -> bool {
+    const auto& grub_config_content = bootloader::gen_grub_config(grub_config);
+    const auto& grub_config_path    = fmt::format(FMT_COMPILE("{}/etc/default/grub"), root_mountpoint);
+    if (!file_utils::create_file_for_overwrite(grub_config_path, grub_config_content)) {
+        spdlog::error("Failed to open grub config for writing {}", grub_config_path);
+        return false;
+    }
+    return true;
+}
+
+auto install_grub(const GrubConfig& grub_config, const GrubInstallConfig& grub_install_config, std::string_view root_mountpoint) noexcept -> bool {
+    // Write grub configuration on the system
+    if (!bootloader::write_grub_config(grub_config, root_mountpoint)) {
+        return false;
+    }
+
+    // Get grub install cmd
+    const auto& grub_install_cmd = [](const GrubInstallConfig& grub_install_config) -> std::string {
+        std::string result{};
+        if (grub_install_config.is_root_on_zfs) {
+            result += "ZPOOL_VDEV_NAME_PATH=YES "sv;
+        }
+        result += "grub-install --target="sv;
+        result += grub_install_config.is_efi ? "x86_64-efi"sv : "i386-pc"sv;
+
+        if (grub_install_config.do_recheck) {
+            result += " --recheck";
+        }
+        if (grub_install_config.is_removable) {
+            result += " --removable";
+        }
+        if (grub_install_config.is_efi && grub_install_config.efi_directory) {
+            result += fmt::format(FMT_COMPILE(" --efi-directory={}"), *grub_install_config.efi_directory);
+        }
+        if (grub_install_config.is_efi && grub_install_config.bootloader_id) {
+            result += fmt::format(FMT_COMPILE(" --bootloader-id={}"), *grub_install_config.bootloader_id);
+        }
+        return result;
+    }(grub_install_config);
+
+    // Install grub on the system
+    if (!utils::arch_chroot_checked(grub_install_cmd, root_mountpoint)) {
+        spdlog::error("Failed to install grub on path {} with: {}", root_mountpoint, grub_install_cmd);
+        return false;
+    }
+
+    // Generate grub configuration on the boot partition
+    static constexpr auto grub_config_cmd = "grub-mkconfig -o /boot/grub/grub.cfg"sv;
+    if (!utils::arch_chroot_checked(grub_config_cmd, root_mountpoint)) {
+        spdlog::error("Failed to generate grub on path {} with: {}", root_mountpoint, grub_config_cmd);
+        return false;
+    }
+
+    return true;
+}
+
 }  // namespace gucc::bootloader
diff --git a/src/utils.cpp b/src/utils.cpp
index 26b4169..8a401c9 100644
--- a/src/utils.cpp
+++ b/src/utils.cpp
@@ -967,40 +967,47 @@ void install_grub_uefi(const std::string_view& bootid, bool as_default) noexcept
     const auto& luks_dev            = std::get<std::string>(config_data["LUKS_DEV"]);
     const auto& grub_installer_path = fmt::format(FMT_COMPILE("{}/usr/bin/grub_installer.sh"), mountpoint);
 
+    gucc::bootloader::GrubConfig grub_config_struct{};
+    gucc::bootloader::GrubInstallConfig grub_install_config_struct{};
+
+    grub_install_config_struct.is_efi        = true;
+    grub_install_config_struct.do_recheck    = true;
+    grub_install_config_struct.efi_directory = uefi_mount;
+    grub_install_config_struct.bootloader_id = bootid;
+
     // grub config changes for zfs root
     if (gucc::fs::utils::get_mountpoint_fs(mountpoint) == "zfs") {
         // zfs needs ZPOOL_VDEV_NAME_PATH set to properly find the device
-        gucc::utils::exec(fmt::format(FMT_COMPILE("echo ZPOOL_VDEV_NAME_PATH=YES >> {}/etc/environment"), mountpoint));
-        setenv("ZPOOL_VDEV_NAME_PATH", "YES", 1);
+        gucc::utils::exec(fmt::format(FMT_COMPILE("echo 'ZPOOL_VDEV_NAME_PATH=YES' >> {}/etc/environment"), mountpoint));
 
-        constexpr auto bash_codepart1 = R"(#!/bin/bash
+        grub_install_config_struct.is_root_on_zfs = true;
+
+        // zfs is considered a sparse filesystem so we can't use SAVEDEFAULT
+        grub_config_struct.savedefault = std::nullopt;
+
+        // we need to tell grub where the zfs root is
+        const auto& mountpoint_source            = gucc::fs::utils::get_mountpoint_source(mountpoint);
+        const auto& zroot_var                    = fmt::format(FMT_COMPILE("zfs={} rw"), mountpoint_source);
+        grub_config_struct.cmdline_linux_default = fmt::format(FMT_COMPILE("{} {}"), grub_config_struct.cmdline_linux_default, zroot_var);
+        grub_config_struct.cmdline_linux         = fmt::format(FMT_COMPILE("{} {}"), grub_config_struct.cmdline_linux, zroot_var);
+
+        constexpr auto bash_code = R"(#!/bin/bash
 ln -s /hostlvm /run/lvm
-export ZPOOL_VDEV_NAME_PATH=YES
 pacman -S --noconfirm --needed grub efibootmgr dosfstools
-# zfs is considered a sparse filesystem so we can't use SAVEDEFAULT
-sed -e '/GRUB_SAVEDEFAULT/ s/^#*/#/' -i /etc/default/grub
-# we need to tell grub where the zfs root is)";
-
-        const auto& mountpoint_source = gucc::fs::utils::get_mountpoint_source(mountpoint);
-        const auto& zroot_var         = fmt::format(FMT_COMPILE("zroot=\"zfs={} rw\""), mountpoint_source);
-
-        constexpr auto bash_codepart2 = R"(
-sed -e '/^GRUB_CMDLINE_LINUX_DEFAULT=/s@"$@ '"${zroot}"'"@g' -e '/^GRUB_CMDLINE_LINUX=/s@"$@ '"${zroot}"'"@g' -i /etc/default/grub
-sed -e '/GRUB_SAVEDEFAULT/ s/^#*/#/' -i /etc/default/grub)";
-
-        static constexpr auto mkconfig_codepart = "grub-mkconfig -o /boot/grub/grub.cfg";
-        const auto& bash_code                   = fmt::format(FMT_COMPILE("{}\n{}\n{}\ngrub-install --target=x86_64-efi --efi-directory={} --bootloader-id={} --recheck\n{}\n"), bash_codepart1, zroot_var, bash_codepart2, uefi_mount, bootid, mkconfig_codepart);
+)";
         std::ofstream grub_installer{grub_installer_path};
         grub_installer << bash_code;
     } else {
-        constexpr auto bash_codepart = R"(#!/bin/bash
+        // we need to disable SAVEDEFAULT if either we are on LVM or BTRFS
+        const auto is_root_lvm = gucc::utils::exec("lsblk -ino TYPE,MOUNTPOINT | grep ' /$' | grep -q lvm", true) == "0";
+        if (is_root_lvm || (gucc::fs::utils::get_mountpoint_fs(mountpoint) == "btrfs")) {
+            grub_config_struct.savedefault = std::nullopt;
+        }
+
+        constexpr auto bash_code = R"(#!/bin/bash
 ln -s /hostlvm /run/lvm
 pacman -S --noconfirm --needed grub efibootmgr dosfstools grub-btrfs grub-hook
-findmnt | awk '/^\/ / {print $3}' | grep -q btrfs && sed -e '/GRUB_SAVEDEFAULT/ s/^#*/#/' -i /etc/default/grub
-lsblk -ino TYPE,MOUNTPOINT | grep " /$" | grep -q lvm && sed -e '/GRUB_SAVEDEFAULT/ s/^#*/#/' -i /etc/default/grub)";
-
-        static constexpr auto mkconfig_codepart = "grub-mkconfig -o /boot/grub/grub.cfg";
-        const auto& bash_code                   = fmt::format(FMT_COMPILE("{}\ngrub-install --target=x86_64-efi --efi-directory={} --bootloader-id={} --recheck\n{}\n"), bash_codepart, uefi_mount, bootid, mkconfig_codepart);
+)";
         std::ofstream grub_installer{grub_installer_path};
         grub_installer << bash_code;
     }
@@ -1012,7 +1019,7 @@ lsblk -ino TYPE,MOUNTPOINT | grep " /$" | grep -q lvm && sed -e '/GRUB_SAVEDEFAU
     // if the device is removable append removable to the grub-install
     const auto& removable = gucc::utils::exec(fmt::format(FMT_COMPILE("cat /sys/block/{}/removable"), root_device));
     if (utils::to_int(removable) == 1) {
-        gucc::utils::exec(fmt::format(FMT_COMPILE("sed -e '/^grub-install /s/$/ --removable/g' -i {}"), grub_installer_path));
+        grub_install_config_struct.is_removable = true;
     }
 
     // If the root is on btrfs-subvolume, amend grub installation
@@ -1022,24 +1029,30 @@ lsblk -ino TYPE,MOUNTPOINT | grep " /$" | grep -q lvm && sed -e '/GRUB_SAVEDEFAU
     }
     // If encryption used amend grub
     if (!luks_dev.empty()) {
-        const auto& luks_dev_formatted = gucc::utils::exec(fmt::format(FMT_COMPILE("echo \"{}\" | {}"), luks_dev, "awk '{print $1}'"));
-        ret_status                     = gucc::utils::exec(fmt::format(FMT_COMPILE("echo \"sed -i \\\"s~GRUB_CMDLINE_LINUX=.*~GRUB_CMDLINE_LINUX=\\\\\\\"\"{}\\\\\\\"~g\\\"\" /etc/default/grub\" >> {}"), luks_dev_formatted, grub_installer_path), true);
-        if (ret_status == "0") {
-            spdlog::info("adding kernel parameter {}", luks_dev);
-        }
+        const auto& luks_dev_formatted   = gucc::utils::exec(fmt::format(FMT_COMPILE("echo \"{}\" | {}"), luks_dev, "awk '{print $1}'"));
+        grub_config_struct.cmdline_linux = fmt::format(FMT_COMPILE("{} {}"), luks_dev_formatted, grub_config_struct.cmdline_linux);
+        spdlog::info("adding kernel parameter {}", luks_dev);
     }
 
     // If Full disk encryption is used, use a keyfile
     const auto& fde = std::get<std::int32_t>(config_data["fde"]);
     if (fde == 1) {
         spdlog::info("Full disk encryption enabled");
-        gucc::utils::exec(fmt::format(FMT_COMPILE("sed -i '3a\\grep -q \"^GRUB_ENABLE_CRYPTODISK=y\" /etc/default/grub || sed -i \"s/#GRUB_ENABLE_CRYPTODISK=y/GRUB_ENABLE_CRYPTODISK=y/\" /etc/default/grub' {}"), grub_installer_path));
+        grub_config_struct.enable_cryptodisk = true;
     }
 
     std::error_code err{};
 
     // install grub
     utils::arch_chroot("grub_installer.sh");
+
+    if (!gucc::bootloader::install_grub(grub_config_struct, grub_install_config_struct, mountpoint)) {
+        spdlog::error("Failed to install grub");
+        umount("/mnt/hostlvm");
+        fs::remove("/mnt/hostlvm", err);
+        tui::detail::infobox_widget("\nFailed to install grub\n");
+        return;
+    }
     umount("/mnt/hostlvm");
     fs::remove("/mnt/hostlvm", err);
 
@@ -1226,20 +1239,26 @@ void bios_bootloader(const std::string_view& bootloader) noexcept {
     const auto& mountpoint   = std::get<std::string>(config_data["MOUNTPOINT"]);
     const auto& device_info  = std::get<std::string>(config_data["DEVICE"]);
 
+    gucc::bootloader::GrubConfig grub_config_struct{};
+    gucc::bootloader::GrubInstallConfig grub_install_config_struct{};
+
+    grub_install_config_struct.is_efi     = false;
+    grub_install_config_struct.do_recheck = true;
+
     // if /boot is LVM (whether using a seperate /boot mount or not), amend grub
     if ((lvm == 1 && lvm_sep_boot == 0) || lvm_sep_boot == 2) {
-        gucc::utils::exec(fmt::format(FMT_COMPILE("sed -i \"s/GRUB_PRELOAD_MODULES=\\\"/GRUB_PRELOAD_MODULES=\\\"lvm /g\" {}/etc/default/grub"), mountpoint));
-        gucc::utils::exec(fmt::format(FMT_COMPILE("sed -e '/GRUB_SAVEDEFAULT/ s/^#*/#/' -i {}/etc/default/grub"), mountpoint));
+        grub_config_struct.preload_modules = fmt::format(FMT_COMPILE("lvm {}"), grub_config_struct.preload_modules);
+        grub_config_struct.savedefault     = std::nullopt;
     }
 
     // If root is on btrfs volume, amend grub
     if (gucc::fs::utils::get_mountpoint_fs(mountpoint) == "btrfs") {
-        gucc::utils::exec(fmt::format(FMT_COMPILE("sed -e '/GRUB_SAVEDEFAULT/ s/^#*/#/' -i {}/etc/default/grub"), mountpoint));
+        grub_config_struct.savedefault = std::nullopt;
     }
 
     // Same setting is needed for LVM
     if (lvm == 1) {
-        gucc::utils::exec(fmt::format(FMT_COMPILE("sed -e '/GRUB_SAVEDEFAULT/ s/^#*/#/' -i {}/etc/default/grub"), mountpoint));
+        grub_config_struct.savedefault = std::nullopt;
     }
 
     const auto& grub_installer_path = fmt::format(FMT_COMPILE("{}/usr/bin/grub_installer.sh"), mountpoint);
@@ -1247,38 +1266,36 @@ void bios_bootloader(const std::string_view& bootloader) noexcept {
     // grub config changes for zfs root
     if (gucc::fs::utils::get_mountpoint_fs(mountpoint) == "zfs") {
         // zfs needs ZPOOL_VDEV_NAME_PATH set to properly find the device
-        gucc::utils::exec(fmt::format(FMT_COMPILE("echo ZPOOL_VDEV_NAME_PATH=YES >> {}/etc/environment"), mountpoint));
-        setenv("ZPOOL_VDEV_NAME_PATH", "YES", 1);
+        gucc::utils::exec(fmt::format(FMT_COMPILE("echo 'ZPOOL_VDEV_NAME_PATH=YES' >> {}/etc/environment"), mountpoint));
 
-        constexpr auto bash_codepart1 = R"(#!/bin/bash
+        // zfs is considered a sparse filesystem so we can't use SAVEDEFAULT
+        if (gucc::fs::utils::get_mountpoint_fs(mountpoint) == "btrfs") {
+            grub_config_struct.savedefault = std::nullopt;
+        }
+
+        // we need to tell grub where the zfs root is
+        const auto& mountpoint_source            = gucc::fs::utils::get_mountpoint_source(mountpoint);
+        const auto& zroot_var                    = fmt::format(FMT_COMPILE("zfs={} rw"), mountpoint_source);
+        grub_config_struct.cmdline_linux_default = fmt::format(FMT_COMPILE("{} {}"), grub_config_struct.cmdline_linux_default, zroot_var);
+        grub_config_struct.cmdline_linux         = fmt::format(FMT_COMPILE("{} {}"), grub_config_struct.cmdline_linux, zroot_var);
+
+        constexpr auto bash_code = R"(#!/bin/bash
 ln -s /hostlvm /run/lvm
-export ZPOOL_VDEV_NAME_PATH=YES
 pacman -S --noconfirm --needed grub os-prober
-# zfs is considered a sparse filesystem so we can't use SAVEDEFAULT
-sed -e '/GRUB_SAVEDEFAULT/ s/^#*/#/' -i /etc/default/grub
-# we need to tell grub where the zfs root is)";
-
-        const auto& mountpoint_source = gucc::fs::utils::get_mountpoint_source(mountpoint);
-        const auto& zroot_var         = fmt::format(FMT_COMPILE("zroot=\"zfs={} rw\""), mountpoint_source);
-
-        constexpr auto bash_codepart2 = R"(
-sed -e '/^GRUB_CMDLINE_LINUX_DEFAULT=/s@"$@ '"${zroot}"'"@g' -e '/^GRUB_CMDLINE_LINUX=/s@"$@ '"${zroot}"'"@g' -i /etc/default/grub
-sed -e '/GRUB_SAVEDEFAULT/ s/^#*/#/' -i /etc/default/grub
-grub-install --target=i386-pc --recheck)";
-
-        static constexpr auto mkconfig_codepart = "grub-mkconfig -o /boot/grub/grub.cfg";
-        const auto& bash_code                   = fmt::format(FMT_COMPILE("{}\n{}\n{} {}\n{}\n"), bash_codepart1, zroot_var, bash_codepart2, device_info, mkconfig_codepart);
+)";
         std::ofstream grub_installer{grub_installer_path};
         grub_installer << bash_code;
     } else {
-        constexpr auto bash_codepart = R"(#!/bin/bash
+        // we need to disable SAVEDEFAULT if either we are on LVM or BTRFS
+        const auto is_root_lvm = gucc::utils::exec("lsblk -ino TYPE,MOUNTPOINT | grep ' /$' | grep -q lvm", true) == "0";
+        if (is_root_lvm || (gucc::fs::utils::get_mountpoint_fs(mountpoint) == "btrfs")) {
+            grub_config_struct.savedefault = std::nullopt;
+        }
+
+        constexpr auto bash_code = R"(#!/bin/bash
 ln -s /hostlvm /run/lvm
 pacman -S --noconfirm --needed grub os-prober grub-btrfs grub-hook
-findmnt | awk '/^\/ / {print $3}' | grep -q btrfs && sed -e '/GRUB_SAVEDEFAULT/ s/^#*/#/' -i /etc/default/grub
-grub-install --target=i386-pc --recheck)";
-
-        static constexpr auto mkconfig_codepart = "grub-mkconfig -o /boot/grub/grub.cfg";
-        const auto& bash_code                   = fmt::format(FMT_COMPILE("{} {}\n{}\n"), bash_codepart, device_info, mkconfig_codepart);
+)";
         std::ofstream grub_installer{grub_installer_path};
         grub_installer << bash_code;
     }
@@ -1291,18 +1308,16 @@ grub-install --target=i386-pc --recheck)";
 
     // If encryption used amend grub
     if (!luks_dev.empty()) {
-        const auto& luks_dev_formatted = gucc::utils::exec(fmt::format(FMT_COMPILE("echo \"{}\" | {}"), luks_dev, "awk '{print $1}'"));
-        ret_status                     = gucc::utils::exec(fmt::format(FMT_COMPILE("echo \"sed -i \\\"s~GRUB_CMDLINE_LINUX=.*~GRUB_CMDLINE_LINUX=\\\\\\\"\"{}\\\\\\\"~g\\\"\" /etc/default/grub\" >> {}"), luks_dev_formatted, grub_installer_path), true);
-        if (ret_status == "0") {
-            spdlog::info("adding kernel parameter {}", luks_dev);
-        }
+        const auto& luks_dev_formatted   = gucc::utils::exec(fmt::format(FMT_COMPILE("echo \"{}\" | {}"), luks_dev, "awk '{print $1}'"));
+        grub_config_struct.cmdline_linux = fmt::format(FMT_COMPILE("{} {}"), luks_dev_formatted, grub_config_struct.cmdline_linux);
+        spdlog::info("adding kernel parameter {}", luks_dev);
     }
 
     // If Full disk encryption is used, use a keyfile
     const auto& fde = std::get<std::int32_t>(config_data["fde"]);
     if (fde == 1) {
         spdlog::info("Full disk encryption enabled");
-        gucc::utils::exec(fmt::format(FMT_COMPILE("sed  -i '3a\\grep -q \"^GRUB_ENABLE_CRYPTODISK=y\" /etc/default/grub || sed -i \"s/#GRUB_ENABLE_CRYPTODISK=y/GRUB_ENABLE_CRYPTODISK=y/\" /etc/default/grub' {}"), grub_installer_path));
+        grub_config_struct.enable_cryptodisk = true;
     }
 
     // Remove os-prober if not selected
@@ -1331,6 +1346,12 @@ grub-install --target=i386-pc --recheck)";
 
     umount("/mnt/hostlvm");
     fs::remove("/mnt/hostlvm", err);
+
+    if (!gucc::bootloader::install_grub(grub_config_struct, grub_install_config_struct, mountpoint)) {
+        spdlog::error("Failed to install grub");
+        tui::detail::infobox_widget("\nFailed to install grub\n");
+        return;
+    }
 #endif
 }