Derbigum warm roof
BBA Agrément Certificate
Certificate type
Alumasc offer a range of options for warm roof systems including preparation applications and primers for a range of substrates; vapour control layers; thermal insulation and Derbigum base, intermediate and top layers. Derbigum is a TPO (Thermoplastic polyolefin) modified bitumen roofing membrane which can be installed using a number of techniques, including torching, pour and roll applications, cold applied or mechanically fixed. Derbigum membranes can be applied as a single layer for quick application, or may be applied as the base or cap layers in a built-up high performance roofing system.
Uniclass 2015 | |
CAWS | J41/10 Built-up reinforced bitumen membrane warm deck roof covering J41/110 Built-up reinforced bitumen membrane warm deck roof covering |
Product Reference | Derbigum warm roof |
Substrate preparation | Not requiredDerbifill SFor levelling and adjusting falls. Hi-Ten 125Base layer nailed to timber deck. Hi-Ten bond taping stripFor unsupported plywood sheet joints. |
Primer | Not requiredAlumasc bitumen primerGeneral purpose primer. Derbiprimer EWater-based primer for porous surfaces. Derbiprimer GCCold spray applied bituminous primer for concrete. Derbiprimer SSolvent-based primer for porous surfaces. |
Vapour control layer | - |
Type | Not requiredEurobase GLGlass reinforced base layer for torch-on and adhesive applications. Hi-Ten BondGlass reinforced base layer for pour and roll applications. Hi-Ten TorchGlass reinforced base layer for torch-on applications. Hydrogard 10Lightweight glass reinforced base layer for pour and roll applications. Hi-Ten 125Lightweight polyester reinforced base layer for pour and roll applications. NilpermPolyester reinforced VCL for pour and roll applications. PermateLaminated kraft VCL for flame free or mechanical fix applications. Derbicoat Selfix HPSelf-adhesive VCL. |
Application | Loose laidFully bonded - cold adhesiveFully bonded - hot bitumenFully bonded - torching |
Insulation | - |
Type | Not requiredAlumasc Polyurethane BGTKorkliteKorklite PlusMineral woolStraight boardTapered board |
Application | Laid in cold adhesiveLaid in hot bitumenLoose laidMechanically fixed |
Thickness | ___ mm |
Isolating layer | - |
Type | Not requiredPolyester-based fleecePerforated bituminous membrane |
Application | Loose laidPartially bonded - cold adhesivePartially bonded - hot bitumenPartially bonded - torching |
Intermediate layer | - |
Type | Not requiredDerbicoat Selfix HPEurobase GLHi-Ten BondHi-Ten TorchHydrogard 10IBabase Oxi 3 mm |
Application | Loose laidFully bonded - cold adhesiveFully bonded - hot bitumenFully bonded - torchingMechanically fixed |
Top layer | - |
Type | DerbigumMineral faced. Derbigum BlackSmooth weathering surface. |
Application | Fully bonded - cold adhesiveFully bonded - hot bitumenFully bonded - torchingMechanically fixed |
Colour | BlackBrindleCharcoalIvoryLight greyRust |
Flashings and detail work | - |
Base layer | Not requiredDerbicoat Selfix HPEurobase GLHi-Ten BondHi-Ten TorchHydrogard 10IBabase Oxi 3 mm |
Application | Loose laidFully bonded - cold adhesiveFully bonded - hot bitumenFully bonded - torchingMechanically fixed |
Top layer | DerbigumDerbigum Black |
Application | Fully bonded - cold adhesiveFully bonded - hot bitumenFully bonded - torchingMechanically fixed |
Colour | BlackBrindleCharcoalIvoryLight greyRust |
Paint finish | - |
Type | Not requiredDerbipaint EWater-based acrylic DerbisilverBitumen-based aluminium finish. |
Colour | AluminiumBlackGreenLight greyTerracottaWhite |
Product Options | Substrate primer: Concrete decks, screeds and metal decks should be primed with Derbiprimer. On plywood decks all board joint should be taped. On close boarded timber decks, a layer of Hi-Ten 125 should be nailed to the deck. Insulation thickness: Alumsac Technical Services can advise on the most economical thickness of thermal insulation, depending upon the required U-value. Alternative methods of attachment: Derbigum can be installed using five different techniques:
Top layer: Derbigum can be supplied with a flat glass fibre reinforced weathering surface or with a mineral finish which comes in a range of colours. |