It's a specific Florida misery: sitting on your screened lanai at dusk, screens intact, door closed — and getting eaten alive anyway. The culprits are biting midges, universally known here as no-see-ums, and the uncomfortable truth is that standard window screening barely slows them down. At around a millimeter long, they pass through the openings in ordinary mesh the way a person walks through a doorway.
The fix isn't sprays or candles. It's mesh geometry — and if you're already re-screening damaged panels, choosing the right fabric costs little more than choosing the wrong one. Here's the field guide.
Screen mesh is described by openings per inch: standard screening is 18×14 (18 openings per inch one way, 14 the other), designed decades ago around mosquitoes and houseflies. It stops both — but a no-see-um needs a fraction of that opening. 20×20 "no-see-um" mesh tightens the weave enough to physically exclude midges, and it's the standard answer anywhere within their range — which, near the Indian River Lagoon's mangroves and salt marshes where midges breed, means most of the Treasure Coast's waterfront and near-water neighborhoods.
Finer mesh means finer trade-offs, and honesty about them beats surprise:
Our practical rule: screen the panels where you actually sit at dawn and dusk with 20×20, and consider standard mesh elsewhere. Mixed-mesh porches are common and sensible.
Pet-resistant mesh is the answer to the most common screen damage we see — dogs, cats, and the occasional raccoon. It's a heavier vinyl-coated polyester, roughly seven times stronger than standard fiberglass, and it turns the nightly paw-test into a non-event. The trade-off is a visibly heavier weave; most owners use it on the lower panels and door panels where animals hit, standard or no-see-um mesh above.
Solar mesh blocks a majority of solar heat gain before it enters the porch — meaningful on west-facing lanais that bake every afternoon. It darkens the view noticeably; it's a comfort choice, not a default.
Heavy-gauge fiberglass (18×14 in thicker strand) is the quiet workhorse upgrade: same insect performance as standard, noticeably better wind-flex fatigue life — relevant on breezy island porches where standard fabric fails on a two-to-three-year cycle.
Whatever mesh you choose, the frame math doesn't change: aluminum screen frames outlive their fabric by decades, and re-fabricing existing frames costs a small fraction of new panels while looking identical when done properly — fabric stretched drum-tight, splined evenly, square in the frame. A re-screen visit is also the natural moment to service the screen door's rollers and latch, which age on the same schedule as the fabric.
The right answer is local. Mangrove-adjacent and lagoon-front homes get bitten through standard mesh and should default to 20×20. Preserve-backing homes fight wildlife and want pet mesh low. West-facing pool cages bake and may want solar panels on the sun wall. Inland, sheltered porches can run standard fabric happily for years. We carry the full menu on the truck, and part of a free screen quote is simply telling you which mesh your porch actually needs — including when the honest answer is the cheap one.
Everything above in one comparison, so you can decide without rereading it.
The honest summary is that 20x20 is a strict upgrade on protection and a small step down on airflow and clarity. Near mangrove, salt marsh or lagoon, that trade is worth making. Several miles inland with no biting-midge problem, standard mesh is not a compromise, it is the right answer.
People treat them as one job because both are aluminum frames with mesh in them. They fail completely differently, and the difference decides what you should spend.
A pool-cage panel is static. It gets fitted once, and after that the only forces on it are wind, UV and whatever the yard throws at it. Its failure mode is fabric fatigue: the mesh chalks in the sun, loses its flex, and eventually splits along a stress line, usually starting at a corner or a screw. The frame itself rarely does anything at all.
A sliding screen door is a machine. It rides on rollers, travels in a track hundreds of times a season, and is pushed, slammed and dragged by people whose hands are full. Its failure modes are mechanical before they are fabric-related: rollers wear or seize, the door goes out of square, it starts catching in the track, and the mesh tears because the frame is racking around it.
The practical consequence is that re-screening a sliding screen door without touching the rollers often buys you a year. The new fabric goes into a frame that is still twisting on every pass, and it tears again in exactly the same place. On a cage panel, new fabric in a sound frame is the whole job.
So when a screen door is the problem, treat it as a door. That is what our screen repair service does: mesh and mechanism in the same visit.
Because the frame is telling you something, and the mesh is where you hear it.
A screen door frame is four light aluminum extrusions joined at the corners. It holds its shape because it is square and because it is supported evenly by two rollers. Take either away and the frame becomes a parallelogram that flexes slightly on every pass.
When a roller wears down or seizes, that corner of the door drops. The frame is now carrying its load diagonally, and all of the racking concentrates at the corner furthest from the failed roller. The mesh, splined into a groove around the perimeter, gets stretched and released a few thousand times a season at exactly that point. It fatigues, the spline creeps out of its groove, and the fabric lets go — in the same corner, on the same door, after every re-screen.
The second cause is the track. A screen track filled with sand makes the door climb and drop as it travels, which is the same racking delivered as a series of small shocks. That is also why beach-adjacent screen doors fail faster than identical doors two miles inland.
If your screen has torn twice in the same place, the mesh is not the fault. Check whether the door drops when you lift the handle side, and whether it runs unevenly along its travel. Fix that, then re-screen once.
A re-screen is a five-minute job done badly and a proper repair done well. The difference is entirely in three things you cannot see once it is finished.
Spline sizing. The mesh is held by a flexible cord pressed into a groove around the frame. Too thin and the fabric can creep out under load. Too thick and it distorts the frame or splits the groove. It has to match both the groove and the fabric thickness, and heavier meshes need a different spline from standard fiberglass — which is why a re-screen that reuses the old spline is a false economy. Old spline has spent years in Florida sun, and vinyl spline shrinks and hardens as its plasticizers migrate out. Shrunken spline is why fabric that was drum-tight in spring is loose by the following summer.
Tension. The fabric has to go in evenly tensioned on all four sides. Pull one side harder and the frame bows, which on a sliding door means it no longer runs square in its track. A sagging screen and a bowed frame are two symptoms of the same rushed job.
Frame prep. The groove gets cleaned out first. Sand and old spline residue left in the channel stop the new spline seating to full depth, and fabric held at half depth is fabric that will pull out.
Done properly, on a sound frame, a re-screen looks identical to a new panel and outlasts several careless ones.
Worth knowing before you commit the whole lanai, because the differences are real and small.
You will notice the airflow on still evenings only. With any breeze at all, the difference between 18x14 and 20x20 disappears into the general movement of air. On a dead-calm August night on a porch that relies on cross-ventilation, it is perceptible.
It holds more film. Finer openings intercept more of what the air carries, and near the coast what the air carries is salt aerosol and fine sand. Salt is hygroscopic — it pulls moisture out of humid air — so a salt film on mesh stays slightly damp and holds dust rather than letting it blow through. The visible result is a screen that hazes over faster than the standard mesh next to it.
The maintenance is trivial but not optional. Rinse from the outside with a hose two or three times a year, more if you are on the water, and let it dry. Do not pressure wash: the jet stretches the fabric out of the spline, which is the fastest way to turn a good re-screen into a sagging one. A soft brush and plain water is the whole method.
The view settles. Most people stop seeing the finer weave within a week or two. The ones who do not are usually looking at a west wall in the late afternoon, which is the hardest condition for any mesh.
We re-screen frames far more often than we condemn them, so it is worth being specific about the cases where the frame really is done.
Everything else — torn mesh, a chalky brittle fabric, a missing pull handle, worn or seized rollers, a door that jumps its track — is a repair on a frame that has decades left in it. Aluminum outlives screen fabric by a wide margin, which is the whole reason re-screening exists as a trade. Repairs start at $275 including parts, labor and a one-to-three-year warranty on both, and 96% of our jobs finish in a single visit.
Yes — anything that excludes a one-millimeter midge excludes mosquitoes comfortably. 20×20 mesh is a strict superset of standard mesh's insect protection; the trade-offs are airflow and a slightly more visible weave, never protection.
Biting midges are most active in the low-wind, low-light windows around sunrise and sunset, especially near their breeding habitat in salt marsh and mangrove mud. That's why we suggest prioritizing fine mesh on the porch panels where you actually sit during those hours.
Absolutely, and it's often the smartest spec: pet mesh on the lower panels taking paw traffic, no-see-um mesh at seating height, standard or heavy-gauge fabric up high. Mixed-mesh re-screens are routine work for us.
Shorter than most people expect, and the mechanism is ultraviolet light rather than wear. UV breaks down the polymer coating on the strands, which is why old mesh looks faded and leaves a chalky residue on your fingers. As the coating goes, the fabric loses flexibility, and a brittle screen splits under wind flex instead of moving with it. Coastal exposure accelerates it, because salt film holds moisture against the fabric between rinses. A door screen on a west-facing lanai simply ages faster than the identical fabric on a shaded north wall, which is why the same house often needs one panel done and not the others.
In most cases yes, and that is the normal repair. Aluminum screen frames outlive their fabric by decades, so the frame you have is usually the frame you keep. It gets condemned only for specific structural reasons: a corner joint that has worked loose, a spline groove split along its length, an extrusion permanently bowed from being forced back onto its track, or deep corrosion. Torn fabric, chalky brittle mesh, a broken handle and worn rollers are all repairs. Re-fabricing a sound frame looks identical to a new panel when it is done with the right spline and even tension.
Because the rollers are no longer holding it at the right height. A screen door is a light frame carried by small wheels, and when one wears down or seizes, that corner drops, the door runs at an angle, and the top guide loses its purchase in the head channel. Any sideways push then lifts it out. Sand packed into the track makes it worse by forcing the door to climb over grit at each pass. Forcing a derailed screen door back on usually bends the frame permanently, so lift it out gently instead and have the rollers and track dealt with together.
Not necessarily, but it is worth checking while someone is there. They are separate doors on separate tracks, and a screen can tear from a dog, a chair or plain UV age with nothing wrong next to it. What they do share is the environment: the same track fills with the same sand, and the same salt film settles on both sets of rollers. It is common for us to arrive for a screen and find the glass panel dragging in the early stage of roller wear, which is the cheap stage. Ask for both to be checked in one visit.
Barely, and the effect is about airflow rather than heat. 20x20 no-see-um mesh passes slightly less breeze than standard 18x14, which you will notice on a dead-calm evening on a porch that relies on cross-ventilation, and essentially nowhere else. Solar mesh is the fabric that genuinely changes temperature, because it is designed to block a substantial share of solar heat gain before it enters the porch. That comes at the cost of a noticeably darker view. If a west-facing lanai bakes every afternoon, the heat question is a solar-mesh question, not a no-see-um question.
You can, and plenty of people do it acceptably on a small window frame. A sliding door panel is harder for two reasons. It is large, so uneven tension bows the frame, and a bowed frame no longer runs square in its track. And it is a moving part, so if the rollers are the reason the old mesh tore, new fabric in the same frame tears again in the same corner within a season. If you take it on, clean the old spline out of the groove completely and match the new spline to both the groove and the fabric thickness.
Indirectly, and mostly by keeping the fabric dirty. Salt aerosol settles on the mesh and, being hygroscopic, holds moisture out of the humid air, so the film stays slightly damp and traps dust rather than letting it blow through. The result is a screen that hazes over and breathes less, which is more noticeable on fine 20x20 mesh than on standard weave. Rinsing from the outside with plain water two or three times a year handles it. Do not pressure wash — the jet stretches fabric out of the spline and turns a good re-screen into a sagging one.
It depends on the panel size, the mesh chosen and whether the door's rollers need attention at the same time, so the number comes after someone has looked at the door rather than before. Repairs start at $275 including parts, labor and a one-to-three-year warranty on both parts and labor. What is worth knowing up front is the shape of the decision: re-fabricing the frame you already have costs a small fraction of a new panel and looks identical when it is done properly, and 96% of our jobs finish in a single visit.
A sticking slider isn't 'just old.' It's chemistry and physics — salt corroding bearings, sand grinding wheels, humidity swelling nothing at all. Here's what's really happening in your track.
Read the guide
The single best thing a homeowner can do for a sliding door costs nothing and takes ten minutes a month. Here's the professional version of the routine.
Read the guide
Rental sliders live a harder life than any owner-occupied door — and fail at the worst times, in front of paying guests. The checklist that keeps them off your review page.
Read the guideFree consultation and honest quotes across the Treasure Coast — most repairs finished in a single visit.