As a homeowner, you have to make countless decisions that involve your home and property. You have to determine the best methods to landscape your lawn or decorate your kitchen. You have to choose an insurance plan that balances coverage with cost. And you have to decide whether you should replace your current bathtub with a more luxurious shower.

And with every decision you make comes the opportunity to make a mistake. Some mistakes may only harm a few flowers. Other mistakes might cost you more in utilities each month.

When you make mistakes with your roof, however, you not only compromise your home’s structural integrity but also decrease your roof’s lifespan, resulting in expensive repairs and replacement. Be sure that you don’t make the following mistakes as you decide how to maintain your home.

1. Replacing Tiles Yourself

After a recent storm, you might notice a few tiles have cracked on your roof. Since you only have five or six tiles to replace, you might assume that you can save money if you do the work yourself.

But unless you have extensive roofing knowledge, you should probably leave the work to a professional contractor. Many homeowners lack the proper safety equipment to mount the roof safely, and still more homeowners lack the skills to install tiles without causing additional damage.

For example, if you walk on the roof to repair the damaged tiles, your own weight may crack any tiles under foot. Professionals know how to distribute their weight along the tiles to prevent unnecessary breakage.

2. Buying Materials on Your Own

The internet allows you to make some savvy shopping decisions. You can compare prices and find discounts at lightning speed, and within a few minutes, you can usually read user reviews on the most popular brands and products.

But once again, you should leave roofing materials up to the roofers. Unless you know how to precisely measure your roof, you may order too many or too few materials for the job. And if you have historic tiles, you may struggle to find a perfect match for your roof. If the tiles don’t match, you may have gaps in your roof that lead to leaks and water damage.

Many roofing contractors, fortunately, have long-established relationships with roofing suppliers. In general, the suppliers give contractors packaged deals on products, and the contractors pass these savings onto you.

3. Ignoring Attic Insulation and Ventilation

Concrete tiles act as good insulators. Their shape and design allow for air flow and circulation, which in turn reduces direct heat transfer between your roof and your attic.

But that doesn’t mean you should ignore insulation or ventilation entirely.

Improperly vented or insulated attics often suffer from condensation and moisture build-up, which in turn leads to mould growth, wood rot and unpleasant odours. If you notice any of these problems, talk to a professional about venting or insulating your attic.

4. Pressure (or Power) Washing Your Roof

Your roof must withstand Mother Nature day after day and year after year. Understandably, it acquires dust, debris and mildew over time. The build-up can lead to unusual colour changes in your roof, and potential home buyers might not like the overall appearance.

But your average pressure washer might be too much for your roof. If you use too high of a setting, you can strip paint, sand and concrete from the tile’s surface, inflicting a lot of extra wear and tear.

Many professional contractors have specialised washers and chemicals specific for roof use. With the right equipment, they can remove dirt and debris and properly prepare your roof for primer and paint.

Want to Avoid Additional Mistakes?

These are just a few mistakes many homeowners make, but the list is far from comprehensive. If you want to ensure that your roof repairs go as smoothly as possible, always talk to a professional you trust before you begin your next project. Your contractor can help you avoid mistakes before they cost you a fortune in repairs.