System Design

ROXUL Roofing products are high performance products that can be used in different sections of a conventional roofing assembly. The stone wool roof boards are engineered for long term performance and do not diminish their thermal resistance over time. The characteristics of the products make them useful in many different portions of the roof assembly.

When designing for green roofing applications where water retention is required, a hydrophobic material like ROXUL stone wool flat roofing insulation is not appropriate for use due to its ability to resist the retention of moisture. Hydrophilic materials should be used in this application.
This section will look at the different ways ROXUL can provide added protection in the roof assembly and which products work best for those designs.

Conventional Roofing Assembly

A roofs main purpose is to protect the interior of the building from the exterior weather as well as limit the transfer of heat between the interior and exterior of the building. Most roofs are comprised of different layers that perform different functions as part of the roof system.
Each of these layers works together to form a functioning roof system that meets the design requirements. ROXUL meets many of the performance requirements desired in the system by providing thermal resistance, fire resistance, sound absorbency and impact resistance.

 

 

 

 

 

Stone Wool System

ROXUL TOPROCK DD and TOPROCK DD Plus products provide a thermal resistance that does not diminish over the use of the product allowing the design R-value to remain over the lifetime of the roof. These products can be used together to create a high performance, fire resistant and dimensionally stable roof system that is needed for key buildings such as hospitals, retirement homes or critical facilities that want to diminish the risk of interruption during the use of the building.

This solution provides optimal secondary benefits but relies on thicker roofs due to the R3.8/in at mean 75°F of the product. This system does not require the use of an additional coverboard, due to the built-in coverboard in TOPROCK® DD and TOPROCK® DD Plus but it could be used for additional performance requirements, such as sound absorbency.
TOPROCK® DD and TOPROCK® DD Plus products can be easily cut with a serrated blade or sawzall type tool to fit around edges or penetrations. This limits the amount of waste on a job site and can reduce costs for waste removal.

TOPROCK® DD is compatible with most mechanically fastened membrane systems and some cold-applied systems. TOPROCK® DD Plus is compatible with torch, hot mopped or self-adhered membrane systems. Need more information on these systems or looking for designs with other membrane attachment methods? Contact your ROXUL sales for approved systems with your preferred membrane type or provider here.

 

Hybrid Insulation System

Hybrid roof systems combine the benefits of multiple types of insulation to create a high performance roof system. These roofs can satisfy the design needs of any job while saving time and money through material and labor savings.

Polyisocyanurate conventional roof systems typically require the use of two layers of polyiso and a layer of coverboard to satisfy building code and best practice recommendations. Due to the higher R-value per inch (typically published at R5.7/in at mean 75°F), the polyiso insulation allows for a thinner roof assembly which can reduce costs in the parapets or in re-roof applications.

Utilizing a layer of TOPROCK® DD or TOPROCK® DD Plus on top of a layer of polyiso can allow for the removal of one layer of the polyiso and the coverboard reducing the material cost and labor needed on the job. In addition, the attributes of these products allows for a higher performing roof. The dimensional stability of TOPROCK® DD and TOPROCK® DD Plus allows for less gapping occurring between the insulation and for less stress to be placed on the membrane. These products also perform well in the case of hail, rated FM 4470 Class 1 – SH (Severe Hail) due to the dual density characteristics of the product allowing the load to be spread out throughout the product. Finally, the layer of stone ®wool will moderate the temperature the polyiso is exposed to, improving its performance and increasing the energy efficiency.

TOPROCK® DD is compatible with most mechanically fastened membrane systems. TOPROCK® DD Plus is compatible with torch, hot mopped or self-adhered membrane systems and can be adhered to the polyiso with most conventional adhesives in order to satisfy performance requirements. Need more information on these systems or looking for designs with other membrane attachment methods? Contact your ROXUL sales for approved systems with your preferred membrane type or provider here.
By combining the two insulating products in one roof system, the overall performance of the roof can be improved in a cost-effective way to satisfy all people involved in the project.

 

Insulating Coverboard

Conventional roof assemblies utilizing foam plastic insulations require the use of a coverboard material in order to provide a suitable substrate for membrane attachment. MONOBOARD® and MONOBOARD® Plus products are used as insulating coverboards to provide added performance to a conventional roof system. The provided R4 per board thermal resistance can allow for the other insulating materials to be reduced in thickness to allow for a thinner profile on the roof. In addition, these products provide added fire resistance and impact resistance for foot traffic or hail.

MONOBOARD® and MONOBOARD® Plus can be easily cut by a serrated blade for use around edges or penetrations in the roof deck. Its size and density will allow it to be maneuvered on the roof easier without having to secure the product on the roof.

MONOBOARD® is compatible with most mechanically attached membrane systems and some cold-applied membranes. MONOBOARD® Plus is compatible with torch, hot mopped and self-adhered membrane systems. Need more information on these systems or looking for designs with other membrane attachment methods? Contact your ROXUL sales for approved systems with your preferred membrane type or provider here.

 

Re-roof or Re-cover Systems

Re-roofing or re-cover roof systems are typically limited by the amount of space they have available in order to provide a high performance roof system while meeting building code and needs of the occupants.

For re-roof systems, utilizing a hybrid approach involving TOPROCK® DD or TOPROCK® DD Plus over top of polyiso insulation can make the most out of the available space in order to provide a high performance, energy efficient roof system that can extend the life of the roof system. ROXUL TOPROCK® DD and TOPROCK® DD Plus also provide the added protection of a non-combustible material during the construction stage of the roof, reducing the risk of a fire spreading on the roof.

For re-cover applications, using MONOBOARD® or MONOBOARD® Plus would allow you to smooth out any irregularities in the roof and provide a high performance coverboard that is easy to handle and cut, allowing the roofing contractor to complete the job ahead of schedule.

TOPROCK® DD

TOPROCK® DD Plus

MONOBOARD®

MONOBOARD® Plus