Ask a Question
Notify Me On Question Update
Email this Question
My husband plants tomato and peppers etc each year. He plants directly under the eves of the house and the water runs off the roof with each rain storm or in the spring run off. I believe this is not good for the soil he is planting the garden in since we have an asphalt roof and I can see the debris from the roof on the soil. He says not a problem, I still have a hard time eating them without thinking I am getting some sort of poison in our systems. Suggestions?
Rate This FAQ
I don't have a definitive answer but researching the OSHA website, they answered this question and I have attached the answer to your question about water catchment from roofs for vegetable gardens.
For the full article go to http://en.allexperts.com/q/Occupational-OSHA-Environmental-1417/Cisterns-water-purity.htm
Here is an excerpt from that response regarding water catchment:
Nearly all types of roofs have been - and are being - used for rainwater collection, but some are better than others.
The best roofing material for rainwater catchment is uncoated stainless steel or factory-enameled galvanized steel with a baked-enamel, certified lead-free finish. With any metal coating, ask the manufacturer whether the coating contains heavy metals (red paint used on metal often contained lead in the past). Any existing metal roof being used for a potable water catchment system should be tested for lead.
Wood shakes, concrete or clay tiles, and asphalt shingles are more likely than other materials to support the growth of mold, algae, bacteria and moss, which can potentially contaminate water supplies. Treated wood shingles may leach toxic preservatives, and asphalt shingles may leach small amounts of petroleum compounds. In addition to the health concerns, a porous or rough roof surface holds back some of the water that would otherwise make it into the cistern. Asphalt roofing has a "collection efficiency" of about 85 percent while enameled steel has a collection efficiency of more than 95 percent. With asphalt roofing, more of the rainwater stays on the roof in a typical rainstorm (i.e., the roof stays wet), though the actual percentage will depend on the duration of the storm.
(note the entire URL - http....=2050 needs to be on one line).
Painted roofs, certain wood shingles and certain asphalt shingles may impart objectionable taste or odor.
If an old roof is used as the catchment area, if it is under tree branches, if the building relies on wood heat, or if the air is too polluted, you need to be wary of elevated contaminant or toxin levels. Roofs with wood shakes, concrete or clay tiles, or asphalt shingles can support unwanted biological growth, such as mold or bacteria, that will require adequate treatment. Some materials, such as terne coating, lead solder, or treated wood, can leach unwanted toxins. (again, the entire url needs to be copied into the browser)
Submit Your Suggestion
Other Questions In This Topic
- We planted some scrub oak plants a few years ago that we got from a nursery. Although they come back every year they never get any bigger. They are still the same size as when we planted them. Do you have any suggestions on how to make it take off?
- We have 2 honeylocust trees in our yard. I would guess "Imperial honeylocust". They seem to be about 15 years old or so. They are spaced about 20 feet apart. This spring one has leafed out and the other is still not budding or leafing out. Over the winter, the one that is not budding turned bright red on the trunk, which we have never seen before. The tree is getting a very few buds and leaves on some main branches (like suckers) but no buds or leaves on the outer limbs. Is there anything we can do to save this tree?
- What materials should I use to raise depressions in my lawn around retaining walls and sidewalks?
- In the vegetable fact sheets it make watering suggestions such as "water 1-2" per week" how much water is 1-2" per week? Also, Can I use blood meal for nitrogen to side dress tender plants?
- I am about to remove a hedge of box leaf euonymous because they were affected by scale that I was not able to control. Is it possible to plant the same species in this spot again?
- My backyard has far too much grass. I'd like to turn a fairly large portion of the lawn into waterwise beds and also expand my backyard vegetable garden. Two years ago, I made some beds by removing the turf. However, it is not only very hard work but it also results in a large amount of excess sod, and takes a good amount of topsoil with it. It also seems wasteful to send it to a landfill. Is there a way to kill the grass without herbicides? For example, will covering it with black plastic be an effective way to kill the grass? If so, how long will it be before I can plant in the new beds?
- The leaves on our maple tree get little spikes on the top of it and then dry up and fall off. Can you tell me the problem and how we may solve it?
- I would like to have a live, potted evergreen as my Christmas tree, and then plant it in my yard. Must the decorated tree remain outside? What species of tree would you recommend?