Attic Ladder Installation in 5 Steps
Installing an attic ladder is not really that hard, but you might need to get your hands a little bit dirty. This article is going to show you how to install an attic ladder, from creating the opening to trimming the stringers.
Adding a folding attic ladder (some people call it disappearing attic ladder) can give you easy access to the attic without taking up to much space inside the house. You need a ceiling opening in order to start the process (if you don’t already have one), and you need to create this opening yourself. The great majority of attic ladders will fit inside a space of 56 (length) by 22 (width) inches.
Step 1: Create a chalk square
First of all, you need to know that in order to create the opening, you will need to cut an attic floor joist. This means that the structural integrity of the attic floor is changed slightly, and the weight that used to be carried by the piece of joist that needs to be cut needs to be transferred to an adjacent joist. This might be easier said than done, especially if electrical wires are involved. Either way, what you have to do is to add a supplemental joist to both of the joists adjacent to the one that needs to be cut.
Chalking the lines is fairly easy, just use 2 nails for orientation. Make sure you have 54 inches between the two nails (or the appropriate dimensions, if specified otherwise by the stairway manufacturer). Usually, the specifications say that you add an extra ½ inch on each side. Once you have chalked the length of the opening, you can use a carpenter’s square to chalk 22 ½ inches for the width, on both sides.
A tip: you need to be sure that you check where the stairway leads you when you step inside the attic. You don’t want to step directly into a wall, for example.
Step 2: Cut the opening
Use a reciprocating saw to do this, and make sure you follow along the chalk lines very precisely.
Step 3: Frame the opening
The opening needs to be framed using joists of the same size with the ones that are already present in your attic. Using joist hangers, attach the joists that meet each other at an angle of 90 degrees. Use hanger nails in the process, not anything else!
Step 4: Attach temporary support edges and shim the supports
Because an attic ladder can be really heavy, you will not be able to install it by yourself, or even with one person helping you. So you will need to install support boards on the sides of the opening. While doing this, you need to be careful so the edges of the boards don’t extend very much beyond the opening.
Then, place the attic ladder on the support, and slowly pull it down in such a way that the hinges are extended. Do not yet place it on the floor though. Shim between the stair and the joists, and drill screws through the respective shims. Think of the weight that the ladder is going to have to support, and use appropriate nails or screws. Make sure that you read the instructions, as most ladders require 16 penny nails. One last caution measure: when drilling, it’s very important that you don’t crack the frame.
Step 5: Secure the ladder on the floor and trim the stringers if needed
First, extend the ladder to the floor, as each foot needs to be flush with the floor. If it’s not, you need to do some trimming, which is not particularly difficult, but it needs focus and patience. Obviously, it’s the bottom section of the ladder that will need to be trimmed (most folding attic ladder are comprised of three sections). If you are anxious about cutting it, ask for professional help. There are lots of online video presentations on the subject, especially for attic ladders produced by Werner or Louisville, probably the most important manufacturers.