Heritage Building Roof Design

Conservation and refurbishment of roofs for heritage buildings demands attention to detail. They often use roof coverings made from traditional materials, making installation more time and labour intensive. Heritage roofs may have areas that are difficult to access, posing a challenge when it comes to the installation and the performance of the roof system. Cover boards are specified to make roof refurbishment easier. They also help increase the building performance of traditional, heritage buildings.

Gypsum core cover boards are light and relatively easy to manoeuvre and install. They are also easier to accurately cut on site, and unlike cementitious board, there is no requirement for specialist equipment.

Once installed cover boards can be used as a flat, homogenous substrate that makes the installation of the waterproofing layer easier. If a single ply membrane is accepted for a heritage roof refurbishment, the fibreglass mat facer of a gypsum core cover board improves the compatibility and the strength of the bond with the roof membrane. This in turn protects the waterproofing membrane from penetrations caused by dropped tools or incidental impact during the works. Once the refurbishment is complete it protects the roof from repeat hail and flying debris.

Cover boards are often used as a fire resistant barrier over combustible and non-combustible materials. Fire protection boards help prevent external fire sources from entering the roof space and internal fire from spreading into it. They also help slow the spread of fire through the roof space.


What are the benefits of DensDeck® Roof Board for heritage buildings?

• Dimensional stability
• Acoustic performance
• Fire resistance

Roof protection boards

The DensDeck® Roof Board helps protect all types of flat roof build ups from natural forces such as hail and wind. They provide dimensional stability to the roof system and shield the waterproofing membrane from dead loads of heavy plant and sudden impact, such as dropped tools or flying debris, whilst adding additional fire resistance.

Sound Reduction

DensDeck® Roof Boards help block the sound penetrating through a roof assembly into a building. Our cover boards help increase occupant acoustic comfort even in high noise commercial settings such as airports.

Acoustic performance >

Fire Resistant

DensDeck® Roof Boards help protect the roof assembly from external fire sources, such as malfunctioning solar panels or embers from a nearby building. They also help to protect the roof space from internal fire spread.

Fire resistance >

Weather Resistance

DensDeck® Roof Boards enhance fastener pull through, increase membrane bond strength as well as dimensional strength. This means greater resistance to wind uplift and repeated hail strikes.

Weather resistance >

Roof Access

DensDeck® Roof Boards spread loads and helps protect the insulation layer installed underneath roof build ups. Our cover boards have high compressive strength and add structural strength to the roof assembly, absorbing foot traffic and helping protect from sudden, damaging impacts.

Roof access >

Typical roof build up for Heritage Buildings

• Roof refurbishment
• Single ply roof build up
• Parapet roof systems


DensDeck® Prime Roof Board
Thickness (mm)6.4 (¼ inch)12.7 (½ inch)15.9 (⅝ inch)
Length (mm)243824382438
Width (mm)1219

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