If you live in an area prone to severe weather, learning how to make a hail proof car cover can save you from expensive auto body repairs. A durable hail-proof car cover needs a soft inner layer and a tough, impact-resistant outer shell. This guide will walk you through creating a custom cover that provides real protection for your vehicle.
Commercial hail covers can be costly and might not fit your specific car perfectly. By making your own, you control the materials, the fit, and the overall quality. You can also save a significant amount of money. The process is a practical weekend project that requires basic sewing skills and the right components.
We will cover everything from selecting the best fabrics to the final fitting. You’ll end up with a reliable shield against hail, sun, and debris. Let’s get started with the most important part: the materials.
How To Make A Hail Proof Car Cover
This section provides the complete, step-by-step blueprint for constructing your cover. Follow these instructions carefully to ensure a secure and effective final product. Having a clean, flat workspace, like a garage floor or a large table, will make the process much smoother.
Essential Materials And Tools You Will Need
Gathering all your supplies before you begin is crucial. Using the correct materials is what separates a basic cover from a truly hail-resistant one. Here is your shopping and preparation list.
Fabric And Padding
The fabric selection is the foundation of your cover’s protection. You will need two primary types of material.
- Impact-Resistant Outer Shell: Look for heavy-duty, waterproof fabrics like 600D polyester or reinforced tarpaulin. Some people use moving blankets or specialized hail protection fabrics available from automotive suppliers. The key is a tight, strong weave that can disperse the energy of an impact.
- Soft Inner Layer: This is non-negotiable. You need a thick, soft material like felt, fleece, or foam padding to cushion the car’s surface. This layer prevents scratches and absorbs shock, ensuring the outer shell doesn’t grind against your paint.
- Thread: Use a high-tenacity polyester thread. Regular thread may break under tension or during a hail impact. A heavy-duty sewing machine needle (size 16 or 18) is also recommended.
Construction Tools
With your fabrics ready, you’ll need these tools to assemble them.
- A heavy-duty sewing machine capable of handling multiple thick layers.
- Sharp fabric scissors or a rotary cutter.
- Measuring tape and fabric chalk or a washable marker.
- Strong rope or elastic cord for the hem channel.
- Grommets and a grommet setting tool for tie-down points (optional but recommended).
- Large safety pins or fabric clips to hold layers together before sewing.
Step-By-Step Construction Guide
Now, let’s move on to the actual building process. Take your time with each step to ensure accuracy and durability.
Step 1: Taking Accurate Measurements Of Your Vehicle
Precision here prevents wasted material and ensures a snug fit. A loose cover can flap in the wind, causing damage.
- Measure the total length of your car from the very front bumper to the rear.
- Measure the width at the widest point, usually across the side mirrors. Add several inches to this measurement to account for the mirrors.
- Measure the height from the ground over the highest point (like the roof or antenna).
- Create a simple sketch with these dimensions. Add extra material—about 8 to 12 inches—to the length and width for seam allowance and a drape that reaches down the sides.
Step 2: Cutting And Layering The Fabric
This step involves creating the protective sandwich of materials. Lay your outer shell fabric flat on your work surface.
- Transfer your measurements onto the outer shell fabric using chalk. Cut out the main rectangular piece.
- Use this piece as a template to cut an identical piece from your soft inner layer fabric.
- Carefully place the inner layer on top of the outer shell, with the soft side facing up (this will touch the car). Secure the two layers together at the corners and edges with clips or pins to prevent shifting.
For enhanced protection, you can add extra padding in high-impact zones like the hood and roof. Simply cut additional pieces of foam or felt and layer them between your main fabrics in those areas before pinning.
Step 3: Sewing The Layers Together
This is where your cover takes shape. If your sewing machine struggles, go slowly.
- Begin by sewing around the entire perimeter of the fabric sandwich, about half an inch from the edge. This is called a basting stitch and it holds everything together for the final seams.
- Next, sew a second, stronger seam about one inch in from the edge. Use a straight stitch and reinforce the start and end of each seam by backstitching.
- Pay special attention to the corners; make sure they are square and securely stitched. You can double-stitch these areas for added strength.
Step 4: Creating A Secure Hem And Tie-Down System
A good hem and tie-down system keeps the cover from blowing away in a storm. Wind is a major enemy of car covers.
- Fold the outer edge of the cover over by about two inches to create a hem channel. Pin it in place.
- Sew along the inner edge of this fold, leaving a two-inch gap unsewn to insert your rope or cord.
- Thread a strong rope or elastic cord through the channel using a safety pin attached to one end. The cord should be long enough to go around the entire cover’s perimeter with extra to tie.
- For added security, install grommets at strategic points along the lower hem, like near each wheel. You can then use these to tie the cover down to your car’s wheels or to anchors on the ground.
Testing And Fitting Your DIY Cover
Before you consider the job done, a proper fitting is essential. This reveals any adjustments needed.
Carefully place the cover over your clean, dry car. Start from the front and work your way back, smoothing it out. Ensure it drapes evenly on all sides without being overly tight. Pull the cord in the hem channel to snug the bottom around the car’s base. Check for any overly loose areas or spots where the padding seems thin. Make any final trims or additions now.
Your cover should fit like a tailored suit—snug but not restrictive, with enough slack to easily put on and take of. A well-fitted cover minimizes wind flap and maximizes protection.
Maintenance And Storage Tips
To ensure your hail proof cover lasts for many seasons, proper care is key. Neglect can lead to mold or fabric degradation.
- Always let the cover dry completely before folding and storing it. A damp cover can mildew and rot the fabric.
- Store it in a cool, dry place, preferably in a breathable storage bag. Avoid plastic bins that can trap moisture.
- Clean it periodically according to the outer fabric’s instructions. Usually, a gentle hose-down and air drying is sufficient.
- Inspect the seams and tie-down cords before each major use, especially if a storm is forecasted. Repair any small tears immediately with heavy-duty tape or a patch kit.
Key Design Considerations For Maximum Protection
Understanding the principles behind hail protection will help you make better material choices and design decisions. It’s not just about thickness; it’s about energy absorption.
The Science Of Impact Absorption
Hailstones carry kinetic energy. Your cover’s job is to dissipate that energy before it reaches your car’s metal surface. The soft inner layer acts as a cushion, compressing to absorb the shock. The tough outer shell spreads the impact over a wider area, preventing a concentrated force. Together, this two-layer system dramatically reduces the chance of dents.
Think of it like a football helmet: a hard outer shell and a padded inner liner. One deflects, the other absorbs. This dual-layer approach is far more effective than a single, thick piece of material.
Weatherproofing And Additional Layers
While hail is the primary concern, your cover should also handle rain, sun, and wind. Consider these additions for all-weather readiness.
- Waterproofing: Ensure your outer shell fabric has a waterproof coating or laminate. You can also apply a after-market waterproofing spray designed for tents or tarps.
- UV Resistance: Prolonged sun exposure breaks down most fabrics. Choose an outer material with UV inhibitors to prevent fading and brittleness.
- Wind Flaps: If you live in a very windy area, sewing additional fabric flaps or straps that cross under the car’s chassis can provide extra stability.
Common Mistakes To Avoid
Even with good instructions, simple errors can compromise your cover. Be aware of these frequent pitfalls.
Using The Wrong Materials
This is the most common error. A single layer of tarp or a cheap nylon cover offers almost no hail protection. It can even scratch your paint. Avoid thin blankets, plastic sheeting, or vinyl without padding. These materials lack the necessary structure and cushioning.
Poor Fit And Inadequate Tie-Downs
A cover that is too loose will whip in the wind, acting like sandpaper against your paint. A cover that is too tight is difficult to install and may stress the seams. Similarly, relying only on a hem cord is often insufficient in strong gusts. Always use the grommets and additional tie-downs to anchor the cover securly.
Skipping The Inner Layer
Never let the abrasive outer shell directly touch your car’s finish. The inner layer is not optional. It protects your paint from micro-scratches caused by the cover itself and is vital for shock absorption. Some people try to save time or money here, and it always leads to a worse outcome.
FAQ About Hail Proof Car Covers
What Is The Best Material For A DIY Hail Car Cover?
The best setup is a combination: a heavy-duty, waterproof outer shell (like reinforced polyester or a hail blanket) paired with a thick, non-abrasive inner layer (like automotive felt or closed-cell foam). This two-layer system provides both impact resistance and paint protection.
Can I Use Moving Blankets To Make A Hail Cover?
Moving blankets can be a good starting point for the inner cushioning layer due to their thickness. However, they are usually not waterproof or UV-resistant. You would still need to add a durable, weatherproof outer shell over the moving blanket for adequate hail and weather protection.
How Do I Secure A Car Cover From High Winds?
Beyond the hem cord, install grommets along the bottom edge. Use these to tie the cover down to your car’s wheels, frame, or to ground anchors. You can also add a strap that goes under the car’s middle from one side to the other. Ensuring a snug fit without excess fabric is the first defense against wind.
Is A DIY Cover As Good As A Commercial Hail Car Cover?
A well-made DIY cover using quality materials can be very effective and offer a perfect custom fit. Commercial covers benefit from engineered fabrics and consistent manufacturing. The DIY route often provides better value and allows for material choices, but requires time and effort. For the highest guaranteed protection, commercial covers from reputable brands are tested to specific standards.
How Much Does It Cost To Make Your Own Hail Proof Cover?
The cost varies based on material choices, but a DIY hail proof car cover typically costs between $100 and $250 for materials. This is generally less expensive than high-end commercial hail covers, which can range from $300 to over $600. You are paying for your labor but saving on the retail markup.
Learning how to make a hail proof car cover is a practical skill that offers peace of mind and financial savings. By following these steps and focusing on the two-layer principle—a soft inside and a tough outside—you can create a reliable barrier against hail damage. Remember to take accurate measurements, choose fabrics wisely, and secure the cover properly against wind. With your custom cover in place, you can face storm season knowing your car has an extra layer of defense.