A mesh quote is incomplete if it gives only a product name, colour, and price. You need enough information to confirm that the screen will fit the opening, suit the way you use it, withstand its environment, and remain serviceable after installation.
Key takeaways
- Ask for clear aperture and open-area percentage, not mesh count alone.
- Give the dealer precise opening measurements in millimetres.
- Match the screen design to access frequency and available clearance.
- Get installation, warranty, parts, and service terms in writing.
What exactly is the mesh and what performance does it provide?
Ask the dealer to state the clear opening in millimetres and open-area percentage in the mosquito mesh specifications, not only a nominal mesh count. Yarn or wire diameter changes the aperture, so the same count can produce different pest exclusion, airflow, and daylight.
| Mesh option | No-see-um mesh comparison | Trade-off |
|---|---|---|
| 18 × 16 insect screen | Standard insect exclusion; not equivalent to fine mesh | More airflow and daylight, less dirt retention |
| Fine no-see-um screen | Smaller apertures exclude biting midges and sand flies more effectively | Reduced airflow and daylight; faster dirt build-up |
Require separate identification of the material and coating: PVC-coated fibreglass, polyester, aluminium, 304 stainless steel, or 316 stainless steel. Ask which heat exposure, solvents, cleaning chemicals, salt, chlorine, abrasion, and pet contact the specification and warranty cover.
Ask for these evidence points:
- A wind test pressure with units, span, open or closed configuration, and deflection or failure criterion. Confirm that it covers the complete assembly: frame, guides, fasteners, corners, and latch.
- The source of insect claims: aperture calculations, laboratory challenge testing, or marketing language.
- For bird safety, the species-specific aperture, yarn or wire strength, UV specification, edge-retention method, and installation tension. A mosquito screen is not automatically a bird barrier.
- For cooling or visibility, quantified open area, solar transmission, glare, and pressure-loss data. “High visibility” proves nothing without measurements.
What must you measure before the dealer recommends a system?
A mosquito mesh measurement must cover each opening, not rely on a nominal “4 by 7 foot” window or door size. Ask the dealer to record clear opening width and height, frame depth and reveal depth, handle clearance, sill condition, both diagonals, and the maximum bow or out-of-square condition.
The survey should also mark anything that could block frame placement or operation:
- Grills, curtain tracks, blinds, door closers, locks, drainage paths, skirting, furniture, and concealed obstructions
- Whether each opening is a hinged door, sliding door, casement window, sliding window, balcony opening, uPVC door, or irregular opening
- Installation tolerance, maximum permitted bow, acceptable sill irregularity, and reveal dimensions required for parallel guides
- A dated measurement sheet, uniquely labelled opening schedule, site-survey photographs, and a drawing showing frame lines, handles, tracks, meeting stiles, and clearances
Compare the drawing with the actual opening before ordering, especially where a grill or curtain hides part of the reveal. For an irregular opening, request an irregular opening screen survey rather than an estimate based on standard dimensions. Ask who pays if installed dimensions differ from the approved survey record.
| Opening type | Measurement issue to verify | Fit risk if missed |
|---|---|---|
| Hinged or uPVC door | Handle, closer, lock, sill, and swing clearance | The screen obstructs operation |
| Sliding door or window | Tracks, meeting stiles, and parallel guides | Panels drag or leave insect gaps |
| Casement window | Frame depth, handles, and outward clearance | The screen cannot sit flush |
| Balcony or irregular opening | Diagonals, bow, drainage, and every reveal dimension | The frame twists or cannot seal |
Which screen design suits the opening and your daily routine?
Match the screen to the opening and your routine, not to the dealer’s catalogue. Ask for one recommendation based on access frequency, cleaning, exposure, and available mounting space.
| Option | Best fit | Questions and cautions |
|---|---|---|
| Fixed mosquito screen | Windows or openings that stay in place | Confirm straightforward cleaning, repair, and removal access. |
| Velcro screen | Occasional access and removable installation | Document the Velcro screen disadvantages: adhesive failure, poor suitability for frequent door use, and no rigid continuous seal. |
| Pleated mosquito mesh | Openings needing compact retraction | Check side clearance, headroom, folded storage, guide cleaning, and cassette repair. |
| Roll-down screen | Openings needing vertical retraction | Ask about roll-down screen limitations, including cassette access, wind exposure, roller failure, and mesh replacement. |
Reject a pleated or roll-down proposal if the mounting surface is damaged, contamination is heavy, or the exposure exceeds the stated limits. Ask how the mesh is retained at the meeting stile and in side channels; channel gaps, worn brush seals, excessive overlap, or a weak magnetic closure can leak insects.
Define “barrier-free” in writing. Ask whether the bottom is genuinely flush, whether a track or guide remains, and how it handles water, dust, grit, and foot traffic.
For sliding and uPVC doors, ask whether the lower edge has a bottom rail, kick panel, or replaceable wear strip. Confirm how it survives shoes, pets, and dragging.
Ask the dealer to explain meeting-stile overlap, brush-seal contact, channel gaps, and magnetic closure adjustment before you approve the design.
What installation details prove the proposed fit will work?
A workable fit is proved by a written installation sequence, stated tolerances, and a component-by-component assembly specification—not by mesh size alone.
Get these installation details in writing:
- Sequence: survey, dry-fit, fix, square, retain the mesh, adjust seals, and test operation.
- Components: frame, side guides, head guide, sill track, corners, fasteners, brush seals, magnets, overlap, latch, and bottom transition.
- Performance: the screen installation tolerance, maximum bow, out-of-square condition, and sill irregularity permitted.
For retractable and pleated systems, require parallelism and alignment tolerances for the guides. A bowed opening can cause drag, gaps, or poor retraction. Ask how an uneven sill will be corrected without creating a trip point or blocking drainage; this is essential for a barrier-free screen installation.
The wind rating for complete screen assembly must cover the installed frame, guides, fasteners, corners, latch, and mesh. Demand the span, pressure units, test configuration, and deflection or failure criterion.
| Deployment state | What to verify | Why it matters |
|---|---|---|
| Closed | Full pressure and failure result | Tests the sealed operating position |
| Open | Whether testing is permitted | Exposes unsupported or unlatched conditions |
| Partially deployed | Pressure and retention result | Reveals drag, gaps, and weak engagement |
For a bedroom, ask whether it is an emergency egress insect screen and whether the window-screen combination meets the required opening size and release force. A removable screen can still obstruct escape.
Request cleaning instructions for mesh, channels, seals, and tracks, including permitted tools and chemicals. In coastal, industrial, or poolside locations, ask whether salt, chloride, chlorine, cement dust, and alkaline wash-down void the warranty.
What warranty, replacement-part, and after-sales commitments are written into the quote?
Do not accept “UV-resistant” as a mosquito mesh warranty or service-life guarantee. Ask which component is UV-stabilized, which accelerated-weathering method was used, and whether the result measures colour retention, retained tensile strength, or both.
- Separate coverage for mesh, frame, seals, magnets, rollers, plastics, fasteners, and installation labour. State exclusions for pets, grit, salt, chlorine, solvents, impact, cement dust, alkaline wash-down, and unauthorised repairs.
- Identify the mesh material and coating, including PVC-coated fibreglass, polyester, aluminium, 304 stainless steel, or 316 stainless steel. For bird-safety claims, add aperture, strength, UV specification, edge retention, and installation tension.
- Ask for replacement mesh and spline, brush seals, magnets, rollers, corner parts, cassettes, and wear strips separately, with the availability period. A replaceable panel can cost less over its life than replacing a complete cassette after a small tear.
| Component | Require in the quote | Replacement question |
|---|---|---|
| Mesh and spline | Warranty term, UV evidence, tear exclusions | Can you supply both separately, and for how long? |
| Seals, magnets and rollers | Coverage and wear limits | Are individual parts stocked? |
| Frame, plastics and fasteners | Corrosion and impact exclusions | Can damaged parts be replaced without a new assembly? |
| Installation labour | Alignment and failed-seal coverage | What repair-versus-replacement policy applies? |
Confirm the screen system lead time from approved measurements, installation window, access requirements, reporting process, service contact, inspection charge, response time, and handover documents. Compare Delmen Nets 9650012393 with another dealer using identical opening schedules and written after-sales service for mosquito screens commitments.
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Frequently asked questions
What mesh performance details should you request from a dealer?
Request the clear opening in millimetres, open-area percentage, yarn or wire diameter, and nominal mesh count. Diameter changes the aperture, airflow, pest exclusion, and daylight.
What measurements must you take before choosing a mosquito screen?
Measure the opening width and height at several points, record the smallest dimensions, and note the frame depth, sill, handle position, and any obstructions.
How do you choose the right mosquito screen design?
Choose a fixed, sliding, hinged, roller, pleated, or magnetic design according to the opening type, available clearance, frequency of passage, cleaning needs, and ease of operation.
What installation details should appear in the proposed solution?
The proposal should identify fixing points, frame clearances, overlap or sealing method, drainage needs, operating direction, and how the installer will accommodate uneven reveals.
What after-sales terms should a mosquito mesh quote include?
Get the warranty period and exclusions, covered components, response process, replacement-part availability, service charges, installation corrections, and contact details in writing.
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