RainShade design sketch by WindFire Designs

It starts as only a concept. But our fantasy to reality conversion ratio is off the charts!

Our models are everything

They are, at once, both miniature dream worlds
and sophisticated analog computers.

The Process

Every site-specific RainShade we make starts with a very detailed survey that has all sorts of measurements that are meaningful to us.

From that survey

By hand, we craft an incredibly accurate model. On these models, 1 cm is 1 foot. In real life we work in laser-measured decimal feet. On the model, caliper-measured millimeter tenths.

Most architecture models are just foam, glue, and pretend materials. Not our models. Ours are working models. Every material that represents what we will fabricate is materials-faithful to the eventual real RainShade. This means the modeled RainShade will behave just like it does in real life.

Wood sticks on the model, wood posts in real life. Polymer film on the model, polymer architectural membrane in real life. Metal screw on the model, metal anchor in real life. Dyneema fiber tied on the model, dyneema fiber rope in real life. Even the knots are identical.

Great rules
make great projects

Every property seems to have it's own rules. Models make them discoverable.

Why not a computer model? Don't worry, that comes later. But the real answer is, because a physical model is better in just about every way.

shade sail model shows window view of real perspective
close up of shade sail model window view real perspective

Out the window

Want to preview what your shade sail will look like? This is a view out of the bedroom window. The model shows everything.

Through that wire rectangle there, that's not a render. That's the actual view of the site's real trees, at the real angle.

Scale and compute

From real model, to real life

shade structure model on top, real thing on bottom comparison

Wire frames

And sight lines

Projecting the sun

These models perfectly show actual shade lines on a property. Before deciding on the final design, we bring the model to the site and orient it North to North. It's like a sun dial that shows time of shade.

like a sun dial, the physical model of the shade sail stucture shows the line of shade at the time of day on the property

Shading a pool projected in summer and in winter.

Shade and sun designed to happen when you want them.

Here the model shows a blue outline of the pool, and the winter sun at the lowest angle it will be all year.

shade structure model showing shade line over a swimming pool in the winter
shade structure model showing shade line over a swimming pool in the summer

Here it shows the same pool and same RainShade design, but during summer, you want your water cool the shade is perfect.

shade structure form-finding model tensile Architecture

Shape capture and design

Analog compute
We designed the whole tech stack

This whole process was developed by us in-house, from scratch, to make these possible. So, what all do we get from the model?

  • Panel curvatures! Every centimeter of seam in the final product is part of a curve. RainShades have extremely precise curvatures. Minimum surface area calculations are hard, but not on our models.
  • Pole lengths, footer placement, anchor placement accurate to within inches.
  • Rope lengths, splice paths, angles, and tension information.
  • Water runoff points, property features, service lines, doors, decks, walkways, everything important is on the model.
model for shade sail to find curve design of panels for rv cover
differential equations for tension calculations of shade sail load points
shade sail concept lines of force diagram showing tension vectors
great dry cover for rv made from windfire designs shade sail

Digital compute

All the measurements for the digital model come from the physical one. So from our on-site laser measurements, to caliper-measured model, to computer model. This is where decisions like seam placement and material layup are made.

Accuracy from Precision

Scaling up happens digitally. As we know, anytime something is scaled up, we lose resolution and thus accuracy, as errors are magnified. So it's the perfect time to use a computer.

RainShade Construction

Curves on curves

Old-world sail making techniques make these complex shapes possible.

cutting curves by hand

Move the machine instead of the work

A big part of why these don't exist elsewhere is that the willingness to sew this stuff is exceedingly rare. Typically, it's welded not sewn. But this is maybe the biggest reason that we can make curved shapes from this membrane when others can't at all. The problem is the welding equipment for this membrane can use only heat. The hot-weld machines can only deal with straight lines. We solved this by hand-laying the long curves up and then sewing them. The material is just so, so stiff. We put our machine on wheels and move the machine down the seams. What you can see in that video of me sewing is the maximum speed it can be done. There is no possibility for faster. But remember, it's worth it because it's a 20 year panel I'm making.

Splice and sew everything

The miracle of the sewing machine can be seen in nearly every aspect of what we make. Not only do we love to sew, but also the tech is just unbeatable. Come on, micro-rivets every few millimeters? Yes. On these RainShades we use thread that is never influenced by ultraviolet. It's part of that amazing 20 year rating.

spliced loops being sewn in a chain
shade sail reinforcement point being sewn at windfire designs

The points

Once all the panels are sewn together, the focus turns to the points. A lot of thought has gone into these. We use 316 stainless rings and UV-impervious lifetime thread. Every edge of RainShade gets a continuous 5000lb test zero-stretch line as well as an individual point line. These two lines can be balanced toegether to acheive perfect tension.

shade sail point reinforcement design rainshade by tim elverston

Every shop needs an assistant

RainShade sails are such a demanding sewing job. We coined the term athletic sewing. It's a bit like sewing on posterboard. Lucky that we have great help.

Installing RainShades

Installing WindFire Designs RainShades

We do all this
but in case you were curious

  • Plot anchor and footer positions in real life from the model onto the site
  • Lay out the poles and anchors
  • Drive ground anchors and any anchors into existing structures
  • Place footer blocks, anchors, and elephant feet
  • Lay out the shade panels, making sure they are protected from abrasion on any rough surfaces
  • Attach lines to posts and lines to anchors
  • Hoist main posts into temporary position
  • Attach RainShade points to line clips
  • Push all posts up and into place
  • Check post and line angles against model and each other
  • Begin the tuning process, very like truing a bicycle wheel
  • Final tensioning, adjustments, and finalize footer anchors
  • Final tuning again, followed by more tuning, hey we have high standards!
  • Enjoy your new RainShade!
high performance precision spliced dyneema rope pre-made and laid out for a shade sail install

Put one on your property

ruth whiting standing under a shade sail made by windfire designs and installed in waldo florida