Hi all,im new on here so please be patient!!! I want to put a stud wall up between 2 existing parts of a brick wall,I had originally knocked the majority out to form an archway between 2 rooms.Everywhere ive looked,ie youtube videos they all say use 4 x 2 timber but the bricks that im going to tie the timber too are just under 4 1/4" in width,approx 105mm.Can anyone help me with any way of doing this as i cannot find any timber the correct size that will bring mw flush with the brick work so i can then plaster board the lot before having it skimmed!! Any help,ideas would be greatly appreciated