Malarkey's limited warranties can remain in effect over an approved deck containing a radiant barrier when installation and ventilation requirements are met. The bulletin excludes responsibility for improper application and resulting heat-related deterioration
Malarkey technical bulletin: Roof Assemblies Utilizing Radiant Barriers.
What this means for your roof
Malarkey’s limited warranties can remain in effect over an approved deck containing a radiant barrier when installation and ventilation requirements are met. The bulletin excludes responsibility for improper application and resulting heat-related deterioration. The presence of a radiant barrier alone does not settle whether a particular roof assembly is suitable.
A useful question for your contractor
Ask for the radiant-barrier and ventilation details to be reviewed together with the selected shingle instructions.
Ask for the answer to be tied to the actual roof condition and the exact product being installed. Keep the agreed repair or installation detail with your estimate and project photos.
Bulletin edition: June 2026. The date shown identifies the manufacturer document used for this summary.
Read Malarkey: Roof Assemblies Utilizing Radiant Barriers
This homeowner summary explains the cited bulletin. The complete manufacturer document and current product instructions govern the installation details. A requirement for one manufacturer or product should not be transferred to another without checking.