Drainage sheets: compare dimple height and backing layers
Compare drainage sheets by their declared geometry and backing layers. A plain dimpled sheet, a felt-backed sheet and a perforated configuration are distinct product types.
Selection considerations
Identify the intended location in the construction build-up and the required drainage path. Read the catalogue's height, material and layer description separately. A nominal height does not establish compressive capacity or drainage performance under project loads.
Coordinate the sheet with waterproofing protection, outlets and edge details. Ask for the relevant technical data for the proposed application and keep installation orientation explicit. When comparing quotations, include any required filter or separator layer rather than assuming every sheet contains it.
Before you specify or order
- Confirm sheet and backing layers
- Identify drainage outlets
- Request application-specific performance data
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-DR-10-PL-0P6-400 · Original supplier model image; selected dimensions are specified in the technical table. Consult the selected technical documents for dimensions and the approved fixing detail.| Product and code | Selected catalogue fields |
|---|---|
BDX-DR-10-PL-0P6-40010 mm HDPE Drainage SheetDrainage Sheets |
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BDX-DR-10-FL-0P6-40010 mm Fleece-Faced HDPE Drainage SheetDrainage Sheets |
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BDX-DR-25-P-1-18025 mm Perforated HDPE Drainage SheetDrainage Sheets |
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Common question
Are felt-backed and plain drainage sheets equivalent?
No. Their layer arrangements differ and should match the specified build-up.
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.