Rockwool Flat Roof Insulation Between Joists

Interior wood framed floor insulation.

Rockwool flat roof insulation between joists.

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 easiest way to increase the value of your roof assembly is to insulate the insulation with a hybrid roof system. 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. Refurbishing an existing timber joisted flat roof which has no insulation.

The insulation is below the deck but above the plasterboard. 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. 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. This is used for refurbishment e g.

A cold deck flat roof will typically require insulation to be installed between the roof joists to comply with building regulation requirements. This minimizes thermal bridging through the roof assembly and ensures reliable long term energy savings. A cold flat roof is one where the insulation is between or between and below the roof joists. Rockwool comfortbatt is a stone wool insulation that provides reliable thermal resistance over time.

There are some basic methods applied in flat roof insulation. Rockwool products are available with a bitumen or mineral coated fiberglass face to be used in a number of roofing solutions. It features a unique flexible edge designed to compress as the batt is inserted then spring back expanding the batt against the frame studs to give a complete fill. Rockwool comfortbatt is a semi rigid stone wool batt insulation for exterior wood and steel stud applications in both new construction and renovations.

Good question theoretically when building a warm roof the vaper control layer goes on the warm side of the insulation. Between and under joists. Providing high quality insulation between cathedral ceiling roof joists is an easy method of improving the overall energy performance of a building. Rockwool insulating roof boards offer warranties long term thermal performance.

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. The insulation batts will not change shape or sag when exposed to temperature changes or moisture.