Indoor Riding Arena Insulation: Condensation, Birds and Heat

Why riding arena insulation starts with moisture

An indoor arena is a very large, very tall room with a wet floor and horses working in it. Riding arena insulation therefore has to be planned around where the water comes from before it is planned around R-value. If the roof steel is the coldest surface in the building and the air under it is damp, indoor arena condensation follows, and insulation only moves the problem if the damp stays.

The page walks through the arena's moisture sources, the roof-versus-walls decision, birds and dust, and the one practical limit that is ours: how high our lift can reach. Horse-barn zones, tack rooms and hay lofts are on horse barn insulation, and the basic mechanism of a dripping steel roof is on why a metal building sweats. Neither is repeated here.

PolyJacks sprays closed-cell foam only, inside buildings within about 35 miles of Spring Hill, KS. We do not remove old insulation, we do not do open-cell or blown-in, and we do not spray outdoors.

Where arena moisture comes from

A builder's answer to an arena owner whose roof was dripping put it directly: "Your moisture is coming up through your crushed limestone and from your horses" (Hansen Pole Buildings, My New Riding Arena Has Condensation and Birds). Horses are not the only supply. Morton Buildings' arena guide ties the humidity in an arena to the horses themselves, and says dust control needs either a watering system or a dust-free footing, so the watering that keeps dust down adds water to the room too (Morton Buildings arena planning guide, 2026).

One of the research sources here comes from outside Kansas (Kentucky). Footing physics and condensation physics are the same here. Whether your footing is dry in July or wet in March is local, and the visit can look at yours.

Hansen's reply to the arena owner also says to gutter the building and run downspouts well away from it, and to vent the attic space properly (Hansen Pole Buildings). It does not say foam fixes the footing. Neither do we.

Still air keeps the moisture where it is. The University of Kentucky's arena research found that over 80 percent of the 37 indoor arenas it assessed had air speeds below the recommended level of 0.51 metres per second (McGill and others, Frontiers in Animal Science, 2023). Still air holds the moisture where it is. The author's dissertation reports that adding eave ventilation and ridge vents with large windows allowed more air movement (McGill, University of Kentucky, 2023). The lesson for an insulation job: the building keeps its ventilation openings, and foam does not replace them.

Roof first, walls second

Most arena condensation is on the roof, because the roof steel is the surface that cools most on a clear night. The roof is therefore the first candidate for foam, and the walls come second.

Sprayed foam is soft against a kick. A wall where horses work usually has a kickboard or a lining, and what covers foam in a room people use is on what must cover spray foam. The building official decides for your arena.

An illustration: the area behind the choice (not a real job)

This is a worked illustration with made-up round dimensions, so you can see why the roof takes most of the surface. It is not a quote and it is not a job we have done. Take a gable arena 80 feet wide, 160 feet long, with a 16-foot eave and a 4:12 roof pitch, and ignore doors, ribs and purlins.

• Roof: 80 by 160 is a 12,800 square foot footprint. A 4:12 pitch lengthens the sloped surface by a factor of about 1.054, so the roof is about 13,500 square feet.
• Walls: two 160-foot sidewalls at 16 feet are 5,120 square feet. The two end walls are each 80 by 16 plus a gable triangle of about 530 square feet, so both together are about 3,600 square feet. Walls total about 8,700 square feet.

So in this illustration, the roof is about three-fifths of the surface, and the walls are the rest. The tool metal building area takeoff works this out for your dimensions, with the same flat-plane limits: it does not count ribs, purlins or laps, so the real surface is larger.

Birds and dust

Open-sided, high and often with gaps at eaves, arenas attract birds. The Hansen reply mentions a reader wanting a ceiling and indoor panels to keep birds from roosting (Hansen Pole Buildings). House sparrows do nest in the rafters of corrugated metal buildings and leave droppings (Sialis, House Sparrows in Commercial Buildings).

What this means for insulation:

• Blanket insulation can hide a nest. A faced blanket hung under a roof has gaps at its seams and edges. The risk is a reading from the sources, not a measured result: a space behind facing is a space a bird can use. Pulling a blanket out is not our work; we do not remove insulation.
• Foam bonded to steel leaves no hollow behind it. There is no pocket between the foam and the panel. That is a property of full bonding, not a promise that birds will never perch, nest on a ledge or peck. The same Sialis page notes that persistent sparrows may peck through expanding foam used as a gap filler, so gaps at the eaves and trim still need closing with metal or mesh.
• Exclusion is its own job. Eave closures, end-wall gaps and door tops are where birds get in. Foam seals some of them. Netting and mesh seal the rest.

Mice and other pests are on do mice eat spray foam.

Dust. Morton's arena guide calls dust control a key factor, through either a watering system or a dust-free footing (Morton Buildings, 2026). Dust is an insulation question for two reasons. First, dusty air settles on every ledge and on any exposed blanket. Second, dust and the watering that controls it both add to the moisture load. A smooth foam surface collects dust like any other surface and can be wiped or blown down; the owner decides how.

Can we reach your roof?

Arena roofs are tall. Foam goes on from our scissor lift, which covers ceilings up to 24 feet. Above that we would rent taller equipment, and whether that makes sense is decided for each building at the visit.

Two things decide reach besides the lift's rating:

1. The floor. A scissor lift needs a firm, level floor to be raised on. A soft footing is not that.
2. Obstructions. Lights, ducts, trusses and fans in the way change where the gun can go.

If the roof is higher than the lift can reach, the options are a different contractor or a different method. The visit measures your clear height and the floor. For what a visit covers, see the free estimate visit, and for our crew and rig, who sprays your building.

FAQ

How do I stop condensation in an indoor riding arena?

Control the footing moisture, ventilate, and insulate the roof so the steel stays above the dew point. Foam alone does not fix wet footing. Start with drainage and ventilation, then check your numbers on the dew point calculator. The thickness check is on the foam-surface condensation check.

Can you spray foam a tall arena roof?

Up to 24 feet with our own lift. Taller roofs need rented equipment, so we look at them one building at a time. The visit measures your clear height.

Is a post-frame arena different from a steel one?

Yes. Wood posts and purlins hold moisture, so they get checked first. That is covered on pole barn condensation, and the post-frame foam questions are on foam in a pole barn.

Do I need to insulate the walls?

Often the roof is enough to start. The decision table above shows what each choice leaves, and the livestock and horse-barn side is on livestock barn insulation.

Book a free on-site measurement

We measure the clear height, the floor the lift would stand on, and the roof and wall area. We also look at ventilation openings, doors and the footing's drainage. You get a written estimate after the visit. The visit is free.

Book a free on-site measurement

Pick "Spray foam insulation" on the booking form. We work within about 35 miles of Spring Hill, KS.

Spray foam insulation is a new PolyJacks service line run by its own crew and rig.

Who wrote this: PolyJacks spray foam team. Last updated: October 27, 2026. How it was made: drafted with AI assistance from the sources below, then checked against each source.

Sources

• Hansen Pole Buildings, "My New Riding Arena Has Condensation and Birds" (undated): hansenpolebuildings.com
• Morton Buildings, "Planning a New Indoor Riding Arena" (May 21, 2026): mortonbuildings.com
• S. McGill and others, "Environmental spatial mapping within equine indoor arenas," Frontiers in Animal Science (2023): public-pages-files-2025.frontiersin.org
• S. McGill, "Improving Indoor Arenas for the Equine Industry," University of Kentucky PhD dissertation (2023): uknowledge.uky.edu
• Sialis.org, "House Sparrows in Commercial Buildings": sialis.org