Which Roofs Are Best For Rainwater Harvesting

If you are thinking of restoring the rainwater then a roof is one of the best resources to collect it. For this, you might be having a plan to install the suitable roof material. Whether you are going to have a brand new roof or planning to change the existing one, you are advised to have expert advice. The exciting news is that most of the roofing materials are suitable for rainwater harvesting except for a few. In this article, we will cover the popular roofing materials for roof-water harvesting. 

1. Metal Roofing 

Metal roofing is one of the most preferred roofing materials and it is also better for the catchment of rainwater. But which type of metal roofing is better for this project? 

Here are the two types mentioned with their pros.

Standing Seam Metal 

The vertical metal panels offer the highest collection efficiency of water. These are counted as the most affordable roof material out there along with maximum benefits. The best thing for installing this roof is that you can easily collect a 60-gallon barrel with less than a single drop of rain falling on a 10’ X 10’ surface. 

Corrugated Metal Roofing 

There is not much difference between standing seam metal roofing and corrugated metal roof for the purpose of collecting rainwater. If you already have a corrugated metal roof or you want it, you must be aware of the precaution to be taken. 

If the surface is bare with zinc, there are high chances to leach the zinc into the collected water. This leads to the contamination of water. So, make sure not to use this water for drinking purposes as having zinc inside your body may lead to health issues. 

Expert Advice: Prevent the leaching of zinc into the water by coating the rooftop. 

2. Asphalt Shingles 

Having an asphalt roof won’t give stress of getting water contaminated as there is no such chance of leaching of zinc. Asphalt roofs are safe for rainwater collection. But there is one drawback of having this roofing material, the loss of water. Asphalt shingles usually have a water loss of about 8%-10%.

3. Concrete Roofs 

If you have concrete roofs and don’t wish to change the material, you can still perform rainwater harvesting. These are not much effective as compared to the others as they easily grow algae quickly. However, you can stop the growth of algae by having a coat on the rooftop meanwhile and use the collected water without having a second thought. The water loss is about 8%. 

4. Solar Panels

There is good news for eco-friendly homeowners. Solar panels have a wonderful collection surface. The solar panels shed clean water. If adhesives are used during roof installation, make sure to test the collected water before using it. 

The Best Roof Slope For Rainwater Collection 

The steep slope is a better option in terms of collecting rainwater in speed. As the angle of your roof determines the speed of catchment of rainwater. Also, prefer to have a higher slope that performs better as a catchment area to impede the possible contaminants from affecting your storage. Higher the roof, the faster the watershed. Also, it is the best solution to remove the debris and any foreign materials. 

Need Help? 

Do you have any other type of roofing material and have queries about it? Be free to contact the Brain Pierce team and clear your doubts immediately.