Replacing an existing expansion joint without guessing the gap
Replacement joint selection starts with a survey of the opening and its supporting edges. The visible width of the old cover is not a reliable measurement of the structural gap.
Selection considerations
Inspect the joint at several locations and record level differences, damaged edges and existing fixings. Establish the required movement from project records or the responsible designer. An old product may have been installed in a configuration that no longer reflects the intended design.
Plan removal, substrate repair and temporary protection alongside the new system. Compare available depth and floor finishes before choosing a surface or recessed replacement. Retain access to any waterproofing or fire barrier that needs inspection. Document the final product code and installation setting for future maintenance rather than retaining only a photograph of the finished cover.
Before you specify or order
- Survey multiple points
- Assess edge repairs and levels
- Record the new installation setting
Relevant BULDX catalogue examples
These records illustrate the product types discussed. Compare the full specifications before selecting; listing here does not establish project suitability or make the items interchangeable.
BDX-AZK-100 · Product geometry from the catalogue; a family illustration may be shared by variants. Consult the selected technical documents for dimensions and the approved fixing detail.| Product and code | Selected catalogue fields |
|---|---|
BDX-AZK-100AZK 100 Floor Joint CoverFloor Joint Covers |
|
BDX-GTK-CORNERConcealed-Screw Corner Joint CoverConcealed Fixing Covers |
|
BDX-AZK-120AZK 120 Floor Joint CoverFloor Joint Covers |
|
Common question
Can the old cover be measured to order a replacement?
It helps identify appearance, but the gap, movement, support and depth still need verification.
References and scope
Product fields are from the BULDX catalogue. Confirm the current selected drawing, supporting performance documents and approved project detail before ordering. External references, where listed, provide background guidance and do not certify these products.