Drainage geonets and drainage boards can occupy different geometries and require different connection details. HDPE geonets need an assessment of the ribbed core under the relevant pressure and gradient. Their comparison with other drainage products should retain the same required water route and adjoining materials.

For a board option such as HDPE dimple drainage boards, orientation, profile and outlet treatment may change. This article explains how to compare complete drainage-core proposals instead of ranking product names or unloaded catalogue flow numbers.

Put both sections on paper

Show core depth, filtering, protection and adjacent layers for each option. Record any change in the installed build-up. A core substitution can affect levels and connections even when both products serve drainage. Keep those changes visible to the responsible designer before procurement treats the alternative as equivalent.

Use consistent hydraulic questions

Provide the same expected loads, gradients and flow requirements to each supplier. Ask for relevant evidence and identify differences in test basis. A headline value from one configuration cannot simply be compared with a result obtained under another. Technical interpretation should establish whether the proposal meets the project's requirement.

Compare joints and boundaries

Ask how cores connect and how filters continue at cuts or edges. Include the outlet transition in the comparison. Different profiles can require different accessories and installation tasks. Price those requirements explicitly rather than assuming that every square metre of product arrives as a complete connected layer.

Consider handling and site access

Review roll or panel dimensions, cutting and placement restrictions. Confined working areas and irregular shapes can change the practical advantages of each product form. Keep handling requirements tied to the accepted support and protection layers. Convenience matters, but it should not override the hydraulic and interface requirements.

Record the accepted alternative

Ask Suneco New Materials to identify its proposed core against the coordinated section and data schedule. If a substitution is approved, update related details. A complete comparison preserves the required drainage function while making changes in geometry, filtering and installation scope clear.