Flies find their way into every home, and once they arrive they multiply quickly and land on food, counters, and clean dishes. Commercial sticky ribbons work well, but a homemade strip costs pennies and takes about 20 minutes to prepare. The principle is simple: a paper strip coated with a sweet, tacky surface attracts flies, and the coating holds them once they land. That same coated-paper idea runs through building products, from the tar paper under wood flooring to felt paper underlayment, so the materials involved are familiar even when the application is not. The finished trap is biodegradable, disposable, and free of the pesticide residues found in many sprays, which matters in kitchens and around food.
How Sticky Fly Paper Catches Flies
Flies land on the strip because the sweet coating mimics the sugars in rotting fruit and other breeding sites. House flies feed constantly, so a single 2-by-12 inch strip can collect dozens of them in one day. Under warm summer conditions a well-placed strip can fill with 20 to 40 flies before the surface loses its tack. Two things make the trap work: an attractant that draws the insect in and an adhesive that holds it. The coating has to stay tacky at room temperature, resist drying out, and remain sticky for days after the syrup sets.
Granulated sugar dissolved in water supplies the attractant. Honey, corn syrup, or molasses thickens the mix into an adhesive. The syrup is heated until it thickens slightly, brushed onto the paper, and left to dry to a tacky film. This sugar-plus-syrup combination is the classic recipe used in homemade fly paper, and it costs a few cents per strip.
Why the paper base matters
The base has to absorb the syrup without falling apart, stay flat while wet, and hold the coating after it dries. Plain kraft paper and brown grocery bags do this well. Waxy or plastic-coated sheets reject the syrup, which wastes the batch.
Freezer paper, parchment, and building felt
Choosing the wrong base ruins an afternoon of work. The same judgment call comes up when you pick between freezer paper, parchment paper, and building felt for other projects, and the deciding factors are identical: absorbency, surface coating, and stiffness. Freezer paper carries a plastic layer on one side, parchment is treated with silicone, and building felt is a heavy asphalt-saturated sheet. Only absorbent, uncoated paper soaks up syrup the way a fly strip needs.
| Paper base | Absorbs syrup | Surface coating | Best use |
|---|---|---|---|
| Kraft paper | Yes | None | DIY fly strips |
| Freezer paper | No | Plastic film | Food storage |
| Parchment paper | No | Silicone | Baking |
| Building felt | Yes | Asphalt | Floor underlayment |
Materials and Tools for Making Fly Paper
Everything needed is usually already in the kitchen or the workshop. Most of these items are reusable for later batches, so the first batch costs close to nothing once the pantry staples are already on hand. Gather these items before mixing the syrup:
- Paper strips: kraft paper, brown grocery bags, or heavy wrapping paper cut to 2 inches wide and 10 to 12 inches long
- Sweetener: granulated sugar plus honey, corn syrup, or molasses
- Water for the syrup
- A saucepan, wooden spoon, and pastry brush
- String, tape, or clothespins for hanging
The base syrup uses equal parts sugar, sweetener, and water. Heat it gently while stirring until the sugar dissolves, then simmer until the liquid thickens slightly. Follow these steps to finish the strips:
- Cut the paper into 2-by-12 inch strips with scissors or a craft knife.
- Combine one part sugar, one part honey or corn syrup, and one part water in the saucepan.
- Heat and stir until the sugar dissolves and the syrup thickens.
- Brush a thin, even coat onto both sides of each strip.
- Hang the strips over a sink or tray to dry for 30 to 60 minutes.
- Mount the strips where flies gather and replace them every 5 to 7 days.
Building a holder for the strips
Strips hang fine from string, but a small wooden holder keeps them off walls, curtains, and furniture. A piece of 1×2 lumber with shallow notches cut at each end holds several strips at once and lifts them away from surfaces where syrup could stain.
Workshop skills that carry over
Cutting, sanding, and finishing that holder takes the same basic skills as any small woodworking job, including the saw-and-sand routine used for a house-shaped cutting board. Anyone who can build that project can finish a fly paper holder in minutes with scrap lumber.
Fly Ash Bricks and Their Comparison with Clay Bricks
One word in this project name trips up more readers than any other. Fly ash has nothing to do with the insects buzzing around the kitchen. It is a fine powder captured from coal power plant exhaust, and the name comes from the way the particles ride up the chimney with the flue gases. In construction, fly ash appears in concrete and masonry products, and builders regularly compare fly ash bricks with clay bricks when they select wall materials.
What fly ash is
Fly ash is a byproduct of burning pulverized coal. Electrostatic precipitators and baghouses collect the particles before they reach the atmosphere. Because the material is pozzolanic, it reacts with water and lime to form cement-like compounds, which is why it strengthens concrete and brick mixes instead of acting as inert filler. Ready-mix concrete commonly replaces 15 to 30 percent of portland cement with fly ash, and masonry blocks and bricks use it as a primary ingredient.
Why the shared name causes confusion
Fly paper and fly ash sound like they belong together, but the only connection is the word itself. One is a pest control product aimed at insects; the other is a construction material made from combustion residue. Knowing the difference helps when reading product labels and building specifications.
Fly Ash Bricks vs Clay Bricks: Key Differences
When a wall, patio, or boundary structure needs brick, the decision usually comes down to two manufacturing routes. Fly ash bricks are pressed from fly ash, lime, gypsum, and sand, then cured with steam or water. Clay bricks are molded from clay and shale, then fired in kilns at high temperature. Those two processes produce different performance profiles.
Comparing performance on the job
Strength develops differently between the two routes. Fly ash bricks gain most of their strength during curing, while clay bricks are at full strength when they leave the kiln. The gap matters on load-bearing walls and on facades exposed to weather.
| Property | Fly ash brick | Clay brick |
|---|---|---|
| Typical compressive strength | 7.5–10 MPa | 3.5–7 MPa |
| Water absorption | 10–12 percent | 15–20 percent |
| Dimensional accuracy | High, pressed molds | Variable, kiln firing |
| Raw materials | Fly ash, lime, gypsum, sand | Clay and shale |
| Curing method | Steam or water curing | Kiln firing at high heat |
The differences show up on the job site. Fly ash bricks arrive uniform in size, absorb less water, and recycle waste material, which lowers embodied energy because no kiln firing is needed. Clay bricks carry a traditional look, handle repeated high heat exposure, and are available almost everywhere. The choice between fly ash bricks vs clay bricks depends on local availability, wall exposure, and whether the project prioritizes dimensional accuracy or traditional appearance.
Transporting and Handling Fly Ash Safely
Fly ash is an extremely fine powder, and dry handling kicks up dust that irritates the eyes and lungs. Bulk pneumatic tankers move it from power plants to batch plants, and silos store it until it is metered into concrete or brick mixes. Transporting fly ash in sealed equipment keeps moisture out and keeps dust out of the air.
Storing fly ash on site
On smaller jobs, fly ash arrives in bags or bulk totes. Storage conditions matter: moisture starts the pozzolanic reaction early and turns stored material into hard lumps. Keep bags on pallets under cover, off concrete floors that sweat, and away from downspouts and sprinkler heads. A covered, level pad with good drainage keeps bagged material usable for months.
Dust control and personal protection
Wear a respirator rated for fine dust plus gloves when handling dry fly ash. Wet the material down before sweeping or shoveling to limit airborne particles, and clean up spills promptly before they get tracked through the building.
Keeping Flies Out of the Building Envelope
Homemade fly paper is a control method, not a cure. The fastest way to cut the indoor fly population is to remove breeding sources that keep the population topped up:
- Trash bins without tight lids
- Pet waste left in the yard
- Compost piles that are not turned
- Overripe fruit and open food containers
Screens on windows and doors stop most entry, and weatherstripping closes the gaps around sashes and frames.
Attic and wall entry points
Some flies bypass windows altogether. Cluster flies push through gaps around soffits, vents, and eaves in late summer and overwinter inside attics and wall cavities. Homes with a history of cluster fly infestations in attics need the same sealing work whether they use traps or not, because the flies are already inside the envelope. Sealing is best done in late summer, before the flies gather at the roofline.
Hang the strips where flies gather: near sunny windows, above trash cans, and beside exterior doors. Replace them when the coating fills up or dries out, usually every 5 to 7 days. In kitchens, keep strips out of reach of children and pets; the syrup is sweet and the adhesive is strong enough to snag fur. A few strips made from kitchen staples, paired with screening and sealing, keeps fly numbers manageable without sprays or foggers.