How to install a shade sail in a rental?

[jcr67]

My car sits on a concrete driveway. I would like to use a shade sail for protection. The shade sail itself - plenty of options - no problem. But I have looked for appropriate support structure options, and am a bit stuck. Priorities/requirements:

1) one or two steel poles (at least) will need to be drilled into the concrete.

2) These poles must be removable, as we are in a rental. So some kind of base plate is likely necessary.

3) low budget

Any advice most appreciated.

[MitchellMc]

Welcome to the Bunnings Workshop community @jcr67. It's wonderful to have you join us, and many thanks for your question about installing a shade sail.

Shade sails can generate a surprising amount of force, particularly in wind, and that is where the challenge lies with a low-budget, temporary setup. Unfortunately, low cost and temporary installation do not really align well with the structural requirements of shade sails.

Even a modest-sized sail can place significant lateral loads on its support posts. For this reason, posts are normally designed to be set deep into the ground with concrete footings so they can resist both pull-out and sideways movement. Surface-mounted steel posts fixed to a concrete driveway using base plates and anchors generally do not provide adequate lateral support for a shade sail, especially in gusty conditions, and there is a real risk of movement, anchor failure, or cracking the slab.

Because of this, temporarily mounting posts to the driveway is not considered a suitable or safe option for supporting a shade sail. A more viable approach is to look for existing solid fixing points, such as structural timber posts, a pergola, or a solid masonry wall that can take the load. These types of structures are far better suited to handling the forces involved.

Given that you are renting, it may be worth having a conversation with the property owner or managing agent to see if they would consider a more permanent installation. Many owners are open to sensible improvements that add value to the property, particularly if they are done properly and left in place. If that is not an option, you may need to consider alternatives, such as a freestanding, temporary carport.

I know that is probably not the answer you were hoping for, but it is much better to be cautious here than to end up with a damaged car due to a sail coming loose in strong wind. If you can post some images of the area, our members might have some clever solutions for your mounting points. Let me know if you need a hand uploading images.

Please let me know if you have any questions.

Mitchell