A well-made window can still leak, bind or loosen when the opening, fixing and perimeter seal are treated as afterthoughts.
Installation begins before the frame reaches the wall. The opening needs to be measured, the wall condition understood, the correct fixing route selected and every supplied unit checked against its label. This guide consolidates the installation controls confirmed in Cavorlen’s supplied technical manual.
Inspect before moving the frame
Check the product model, dimensions, finish, glass and accessories against the approved schedule. Photograph transport damage or broken glass before installation begins.
Measure the opening width and height, check level and plumb, identify load-bearing or lightweight construction and confirm that external waterproofing substrates are ready.
- Product and opening mark
- Frame dimensions and finish
- Glass and accessory condition
- Wall type and fixing route
- External waterproofing readiness
Set, level and fix the frame
The supplied general guide gives a reference perimeter gap of 15-20 mm. Do not use that range as a universal setting-out rule: the approved system detail, joint design and actual substrate must govern the installation.
The supplied reference also lists fixing spacing no greater than 600 mm and a fixing within 200 mm of corners. These are not project-specific anchoring approval. Confirm fixing type, position, spacing and supporting construction through the responsible design and installation review before work begins.
Build a continuous perimeter seal
Fill the frame-to-wall gap fully with appropriate foam rather than packing it solid with cement mortar. Protect the foam from weathering.
Use weather-resistant silicone externally and a compatible neutral sealant internally. Continuous, properly tooled joints help control the path of wind-driven rain.
- Continuous external seal
- Protected insulation layer
- Compatible internal seal
- Clear sill drainage paths
Adjust operation by opening type
For sliding units, set roller height so panels move smoothly without rocking or binding, then verify locks and soft-close components where supplied.
For casement units, adjust hinges or friction stays so the sash closes evenly against the seals. Keep drainage openings unobstructed and test every lock point and handle.
Protect, hand over and maintain
Remove excess sealant, protect exposed frames from following trades and keep the system dry and undisturbed while sealants cure. The supplied guide uses 24 hours as a general curing caution; the sealant manufacturer’s instructions govern the actual product.
Explain track cleaning, drainage inspection, hardware adjustment and suitable lubrication. Do not hang loads from open sashes or use force when a panel binds.
Agree a readiness gate before starting each opening group
Match the delivered unit to the opening mark and current drawing, then identify the installation detail applicable to that wall and product. A general checklist cannot select anchors, verify a substrate or establish a permitted joint dimension. The responsible installer and project designer must resolve those inputs using the actual system and site conditions.
Check whether the surrounding construction is ready for the agreed sequence. Missing sill preparation, uncertain support or unfinished interface decisions should be recorded as a hold with an owner, not corrected by an improvised material substitution.
- Unit and opening identities match
- Current installation detail is available
- Support and fixing route are confirmed by the responsible party
- Perimeter and water-management interfaces are assigned
- Specified materials and compatibility information are available
- Safe handling, access and protection arrangements are ready
Hand over a record that helps the next person maintain it
List the opening marks, approved configuration, installer, inspection date, unresolved items and agreed closure actions. Include the supplied care instructions and identifiable hardware or spare-part references. Keep site installation observations separate from factory test reports so the scope of each record stays clear.
Use the installation-detail review for the drawing discussion and the site-delivery checklist when receiving the units. Send the opening details if your project needs clarification before installation planning.
FAQ
Can cement mortar be used to fill the complete perimeter gap?
The supplied guide says no. Use an appropriate insulated fill and a controlled internal and external sealing route.
What fixing spacing should installers use?
The supplied general reference is no more than 600 mm between fixings, with a fixing within 200 mm of corners. Project details and substrate engineering take precedence.
Is installation included in export pricing?
Not automatically. Freight, lifting, installation and local site work must be confirmed line by line before order.
Continue the project review
Connect this guide with the proposed window and door systems, then review how Cavorlen approaches manufacturing and quality control. When your schedule is ready, send it through the project review form.
Official sources used
Cavorlen — supplied technical installation manual ↗Cavorlen — manufacturing and quality evidence route ↗Related buyer guides
This buyer guide provides a review method, not project-specific engineering, legal or compliance approval. Confirm the governing specification, applicable requirements and authorised project decisions before acting.