Rockwool Flat Roof Insulation Between Joists

A cold deck flat roof will typically require insulation to be installed between the roof joists to comply with building regulation requirements.

Rockwool flat roof insulation between joists. Rockwool comfortbatt is a stone wool insulation that provides reliable thermal resistance over time. This is used for refurbishment e g. Rockwool stone wool roof insulation combines the thermal performance dimensional stability impact resistance and acoustic control required to increase the performance of many flat roof assemblies. No matter the climate zone rockwool stone wool does not shrink and does not lose its r value from install to reroof.

A cold flat roof is one where the insulation is between or between and below the roof joists. Interior wood framed floor insulation. Rockwool comfortbatt is a semi rigid stone wool batt insulation for exterior wood and steel stud applications in both new construction and renovations. The easiest way to increase the value of your roof assembly is to insulate the insulation with a hybrid roof system.

However this method of insulation usually involves the removal of roof decking and covering so it is best done whenever you decide to renewal your roof covering. The insulation is below the deck but above the plasterboard. Between and under joists. There are some basic methods applied in flat roof insulation.

Good question theoretically when building a warm roof the vaper control layer goes on the warm side of the insulation. The insulation batts will not change shape or sag when exposed to temperature changes or moisture. If you put insulation under the decking and between the joists you lower the temperature of the decking and lower the due point thus bringing it closer to the danger point of being in the building. Providing high quality insulation between cathedral ceiling roof joists is an easy method of improving the overall energy performance of a building.

Rockwool products are available with a bitumen or mineral coated fiberglass face to be used in a number of roofing solutions. Rockwool insulation for flat roof and built up metal roofs has been designed to meet the demands of modern roof systems providing durable solutions which simplify design and lower costs. Namely the insulation can be installed within the structure zone with or without ventilation usually between the existing roof joists which could be a good solution since this way you maintain the existing structure and its thickness. Unless the joists are exceptionally deep there is also likely to be a requirement to install insulation to the underside of the joists as the upper 50mm of joist space is usually required to be left clear for ventilation purposes.

Rockwool offers stone wool insulation products to meet and exceed thermal regulations in floor constructions as well as solutions for separating floors to prevent heat transfer between the upper and lower floors. Refurbishing an existing timber joisted flat roof which has no insulation.