Delta-Trela installation information
Installation instructions
Giving protection against corrosion and moisture, Delta-TRELA is an underlay for metal-clad roofs from Delta Membrane Systems.
To ensure correct and effective installation, the company offers a two-page installation guide.
It shows how this product is installed in horizontal runs, parallel to the eaves, with the dimple texturing facing upwards.
This allows the Delta-TRELA to prevent moisture accumulation under metal roofs, and eliminate the risk of corrosion.
CI/SfB subheadings under which this document is classified:
The product information is supplied by NBS Plus which is a library of building product manufacturer information linked to NBS clauses and clause guidance.
The following products are related to this document:
Delta-Trela
Underlay for use in all types of metal-clad pitched roof and wall constructions excluding lead.

H71 Lead sheet coverings/ flashings, H72 Aluminium strip/ sheet coverings/ flashings, H73 Copper strip/ sheet coverings/ flashings, H74 Zinc strip/ sheet coverings/ flashings, H75 Stainless steel strip/ sheet coverings/ flashings
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