**6. Conclusions**

In this work, we have described the design and testing of a new piece of equipment, which was developed to enhance speed, gas consumption and safety during the manual asphalt roofing process. The novelty of the equipment is sustained by the use of a set of five parallel gas burners located in front of the roll to maximize the heat transfer. The equipment is light and practical for use by any worker on any type of roof. It also includes a thermal insulation cover to significantly reduce the gas consumption and, thus, to reduce CO2, SO2, and other non-eco-friendly emissions. We have shown the mechanical and thermal design and analysis of the equipment, CFD simulations for the heat transfer calculations, a description of the manufacturing and assembly, a preliminary thermal test, and an operational test.

The equipment demonstrates an installation speed of 1.75 m<sup>2</sup>/min for 3 kg/m<sup>2</sup> rolls, which leads to around 700–735 m<sup>2</sup> per person per day, more than twice the usual manual roofing rate. Nevertheless, some issues need to be resolved, such as the nonuniform heat distribution or the low heat transfer at the end of the roll installation. Finally, a complete list of weak points and suggestions for improvement was given.

**Author Contributions:** Conceptualization, E.D.-J. and A.B.-G.; methodology, E.D.-J. and A.B.-G.; mechanical design, A.B.-G. and M.F.-M.; manufacturing and assembly, A.B.-G. and E.D.-J.; simulation, A.B.-G.; validation test, A.B.-G., E.D.-J., and M.F.-M.; formal analysis, A.B.-G.; literature review, E.D.-J.; data curation, E.D.-J. and A.B.-G.; writing—original draft, A.B.-G. and E.D.-J.; writing—review and editing, E.D.-J. and M.F.-M.; supervision, E.D.-J.; project administration, E.D.-J.; funding acquisition, E.D.-J. and A.B.-G. All authors have read and agreed to the published version of the manuscript.

**Funding:** The research leading to these results was partially funded by Ingeniería Industrial Ibérica S.A. and Cubiertas ALMADI 2017 S.L.

**Acknowledgments:** The authors wish to recognize the work of Alba Martínez Pérez during preparation of the figures and 3D pictures.

**Conflicts of Interest:** The authors declare no conflict of interest.
