The headliner on my 2006 Volkswagen Jetta is separating from the roof and sagging down. The car has only 50,000 miles on it but looks like it's from 1976, not 2006! The sagging is unsightly and needs to be fixed. What's the best way to do this? I want the headliner secured better than the way Volkswagen did it!
Expert automotive mechanics share their insights :
The headliner is a piece of material with a foam backing which is glued to the roof of the interior. The glue used by Volkswagen to adhere the headliner does not hold up very well, causing the material and foam to fall apart. The material cannot be glued back on with out looking unsightly. The only fix is to have an upholstery shop remove headliner and replace the material.

What do you need to know about your car from an experienced mechanic?

We have included a variety of viewpoints, from academic articles to blog posts to personal essays. We believe that by reading these different perspectives, you will be able to develop a more nuanced understanding of this topic. :

One of the easiest ways to put the headliner back into its place is to use glue. It will best work if the fabric is sagged partially, like in a corner or around the edges. To effectively fix headliner in car without removing, you have to apply a special headlining adhesive because ordinary glue will be of no use.
Option 1: Use glue

If your car`s headliner has started to sag along the edges or at a corner, the easiest way to repair it is with glue, specifically a spray-on headliner adhesive made for attaching car roof lining—though hot glue can work in a pinch if you don`t have the professional spray adhesive.

What Causes The Headlining To Sag? Extreme heat is the main cause of this problem. It melts the glue and makes the fabric come loose. In addition to this, some cars may have poor waterproofing and allow for water to make its way into the roof lining foam, causing deterioration to the glue.
The most common type of damage to a stitched headliner is a tear in the fabric. If you are not showing your antique and the tear is relatively small, you can possibly fix it without removing the headliner. Using matching thread, and if there is enough give in the fabric, sew the gap closed using a whip stitch.
Reusing Headliner Fabrics

There are several ways to reuse them. Some people simply wash them in cold water and hang them up to dry. Others put them into the washing machine. Still, others use a commercial product called “Re-Fabric,” available at many auto parts stores.

A headliner is the material that covers the ceiling of a vehicle, but it does more than hide bare metal with color-coordinated soft fabric.
What Does A Sagging roof look like? It`s easy to spot sagging roof. You will see a dip on the flat part of your roof, a bow in the roofline, or humps and waviness on the roof plane. If the problem is related to the foundation, you will also begin to see cracks on the exterior walls and uneven support beams.
Use a jack-and-post system to slowly jack up the ridge beam. Set up two jacks and posts so that they`re evenly spread out from one another in the middle, below the roof ridge beam. Slowly jack up the roof ridge and then tighten the chains each time you jack it up. Continuously repeat this process until you are done.
A sagging roof isn`t just unsightly; it is also potentially dangerous for your home and its inhabitants. Roofs are supposed to be straight. Therefore, a sagging roof structure signifies that the structural integrity is compromised. If you don`t get your sagging roof fixed, your roof may collapse.
Remove the Headliner and Board

Basically, any trim around the headliner and any overhead consoles and lights need to be removed. Gently pull down on the headliner, but be careful. There may be some velcro or even glue that holds the headliner board to the vehicle ceiling.

Over time the headlining fabric can separate from its backing board, resulting in a so-called “sagging headliner”. The sagging occurs because the condition of the glue that holds it to the backing deteriorates over time. The process is accelerated if the headlining becomes wet.
The panel retainers are designed to hold panels securely while offering a streamlined appearance. The headliner retainers and caps work in combination to secure the airplane headliner. Some of these extrusions also offer the functionality of a built in curtain track.
I needed to repair the headliner in my car and couldn`t use regular glue. My son recommended the spray glue and we both like Gorilla Glue. The spray was extremely easy to use – I sprayed the inside area to be fixed, patted the area to set the headliner back and that was it.
Replacing a headliner usually takes one to three hours at a repair shop. It involves removing the sun visors, interior lights, and trim panels surrounding the headliner, and then removing the headliner itself.
Car headliners typically last between five to ten years, depending on their material type and exposure to sunlight or moisture damage over time. The fabric may become worn down over time due to regular use or exposure to dirt, dust, smoke, etc., so it`s important to inspect it regularly for any signs of wear and tear.
A headliner is the main act in a music, theatre, or comedy performance. Generally, the headliner is the final act in a performance, preceded by the opening act(s).
An installer will remove the old headliner and then purchase the correct parts to replace it.
Let the headliner dry completely by blotting any moisture using a microfiber towel. After that, let it air dry. This could take an hour or two, depending on how wet it is.
And repairing a ceiling after someone has fallen through it costs between $250 and $750. More expensive repair types include sagging, with a price range between $250 and $1,000. Water damage costs $200 and $1,500 to repair, while repairing a leak and a damaged ceiling can be as much as $2,000.
A coffered ceiling is a pattern of indentations or recesses in the overhead surface of an interior. This classic treatment can be executed using various different materials and patterns, such as crown molding details, geometric outlining, or wood beam grids.
The layers include a head impact countermeasure (HIC) layer of co-extruded thermoplastic and a rigid foam layer laid adjacent to the HIC layer and made of a thermoplastic. The layers are subsequently molded together to form the headliner.
The purpose of the molding is stated in its description; to catch drips and prevent them from entering the windows. If you mostly drive with the AC on and the windows closed, you can live without. It should not be “popping off in the car wash”.
More than 90% of all car seat fabric in the world is polyester, because only polyester has the required standard of high abrasion, resistance combined with UV and light resistance. The laminate provides a soft touch, prevents creasing or bagging over many years of use and also gives deep attractive sew lines.
Sagging: If you can see one section of the roof visibly sagging, you should take immediate action to fortify and repair it. Roof collapses are almost always the result of poor care of the roof over a long period of time, rather than being something that happens all at once.