Option B (AvosDim cadre aimanté, 19,90€ each) — Best deal. No drilling, magnetic mount, recoupable. Buy 4× from Leroy Merlin. The 120×100cm size covers all your windows (trim down to fit). Total: ~80€.
Option A (AvosDim direct, from 21,51€ each) — If you want sur-mesure sizing from the factory instead of trimming yourself. Total: ~86-96€.
Option F (ISOXA 150×150, ~30-40€ each) — Pre-assembled frame with fiberglass mesh, recoupable. More expensive but no assembly required. Total: ~120-160€.
Best pick total: ~80€ for all 4 (Option B from Leroy Merlin) Tip: Buy recoupable (cuttable) frames one size up and trim to exact dimensions. No need for sur-mesure service.
Best pick: Benz24.fr at 123,92€ — cheapest by far, 4.9/5 rating (661 reviews), ships to France. You select your Velux size code at checkout.
Runner-up: Takfonster.fr at 161,16€ — French-based, in stock, fast shipping, excellent reviews (5/5, 17 ratings on MK06).
Takfonster direct product links by model code:
Based on your measurements, your windows are likely:
Bathroom (103×83): closest to MK06 (78×118) or PK06 (94×118) — check code
Office (101×81): closest to MK06 (78×118) — check code
Master BR (87×71): could be MK06 (78×118) — check code
Kid BR (101×82.5): closest to MK06 (78×118) or PK06 (94×118) — check code
Note: ZIL sizing is by exterior frame, not glass. Your glass measurements are smaller than the model's window size because the frame adds ~10cm. The data plate code is the only reliable match. Best case: ~496€ for 4 (Benz24 at 123,92€ each) Mid case: ~596€ for 4 (Velux Shop at ~149€ each) Worst case: ~771€ for 4 (La Boutique du Volet at 192,78€ each)
⚠️ CRITICAL: Velux ZIL screens are sized by MODEL CODE, not raw measurements.
Your measurements (103×83, 101×81, 87×71, 101×82.5) are glass dimensions. The ZIL must match the Velux window model code (CK02, MK06, PK06, SK06, etc.) printed on the data plate inside each window frame.
How to find model codes:
Open each Velux window fully
Look at the top of the frame, inside (top-right corner)
Find the data plate (small metal or plastic tag)
Note the code (format: two letters + two numbers, e.g. "MK06")
Example: A CK02 ZIL fits windows with glass ~55×78cm. A PK06 fits ~94×118cm. Your windows are mid-size, likely MK06 or SK06 range, but only the data plate confirms.
Once you have the codes, I can look up exact prices at each store.
🔄 Non-Velux Alternatives for Top Floor Skylights
All options below are compatible with Velux, Fakro, Roto, and Toiciel roof windows. Listed cheapest to most expensive.
Option 1: Toile Moustiquaire Zippée — AvosDim
Detail
Info
Price per window
~15-25€
Total for 4
~60-100€
Type
Velcro + zip screen (no frame, no drilling)
Installation
Stick Velcro strip around embrasure, press mesh on. Zip to access window.
Pros
Cheapest option. No tools. Renter-friendly.
Cons
Crude. Not great for daily use. Aesthetic is minimal.
⚠️ AvosDim reputation note: 4.4/5 from 49,522 verified reviews (Avis-Vérifiés). Real French manufacturer in Béthune. Mixed Trustpilot reviews (delivery delays, sur-mesure sizing errors). Product quality is good; customer service is mediocre. Pay with credit card or PayPal for chargeback protection.
📊 Summary
Type
Count
Est. Total
Cadre fixe (ground floor)
4
~80-120€
Top floor — Option 1: Toile zippée (AvosDim)
4
~60-100€
Top floor — Option 2: Toile auto-agrippante (Kocoon)
4
~72€
Top floor — Option 3: Plissé universel (AvosDim) ⭐
4
~120-200€
Top floor — Option 4: Enrouleur Luxe (AvosDim)
4
~140-220€
Top floor — Option 5: MoustikIT (Leroy Merlin)
4
~280-360€
Top floor — Option 6: Voletshop sur-mesure
4
~456€
Top floor — Option 7: Velux ZIL (OEM)
4
~496-771€
Scenario
Ground + Top
Total
Cheapest (toile zippée)
80-120€ + 60-100€
~140-220€
Best value (AvosDim plissé) ⭐
80-120€ + 120-200€
~200-320€
Best roller (AvosDim enrouleur)
80-120€ + 140-220€
~220-340€
Safe pick (MoustikIT from LM)
80-120€ + 280-360€
~360-480€
OEM (Velux ZIL cheapest)
80-120€ + 496€
~576-616€
📋 Order Status & Next Steps
✅ Order Placed — AvosDim
Date: 2026-08-12
Supplier: AvosDim.com
Item
Qty
Details
Mount
Price
Cadre recoupable alu blanc 130×150cm
3
MKFISTD, fibre de verre, to trim to each ground floor window
MK_FDT, remaining 2 skylights — configure with embrasure measurements
En applique (if irregular) / Encastré (if square)
~150-200€ est.
Order total so far: ~260€ (5 items) + ~150-200€ for remaining 2 skylight screens Estimated grand total: ~410-460€ (vs ~576-891€ with Velux ZIL)
Remaining to do
2 more skylight screens: Measure embrasures for the last 2 Velux windows. If square opening → encastré (cheaper). If trapezoidal/irregular → en applique.
Ground floor (3 kits for 4 windows): You ordered 3× 130×150cm cadre kits but have 4 ground floor windows. Either order a 4th kit, or check if one window is small enough to cover with a leftover trimmed piece from another kit.
Installation — ground floor: Trim alu profiles to dormant frame dimensions with hacksaw. Assemble frame, press spline, clip into window dormant with no-drill clips. ~15 min/window.
Installation — top floor: Screw cassette and rails into embrasure wall (encastré) or sloped wall (en applique). ~30 min/window. All work from inside.
Tools needed: Hacksaw (scie à métaux), file, tape measure, pencil, screwdriver, spline roller (included or ~2€). Drill for top floor screens.