Roofs

Regardless of the type or slope of the roof, it is the most important part of the building envelope contributing to heat loss and energy efficiency. When you reduce heat loss through your roof, you need less energy to heat your entire house.

We have excellent insulation solutions for all different roof types; flat roofs, pitched roofs and joist roofs. The below section of this site contains the most common roof insulation solutions for buildings. Choose your roof type to find the PAROC product you need.

Flat roofs are the roofs with a slope of 1:10 to 1:80

Most low-slope roofing systems fail prematurely due to moisture intrusion. Therefore, it is crucial design flat roofs to effectively resist moisture. Moisture enters the roofing system and creates problems in three different ways: 

  1. During installation: rain and moist materials 
  2. Air leakage: indoor air humidity migrates from the building interior into the roofing system through the gaps in supporting structures
  3. Membrane failure: breaks in the membrane allow water to enter the roofing system from the exterior

However moisture enters the roofing system, the effect is the same: reduced energy efficiency, corrosion of metal components (decks and fasteners), mechanical degradation of the insulation materials, and bond failures between adhered components. These effects reduce durability, shorten service life, and create health and safety issues.

Pitched roofs have always been by far the most common roof type in domestic buildings. The insulation of a pitched roofed building at joist level (cold attic) represents the lowest cost method of insulating a roof. One of the least expensive ways to do this is by installing mineral wool insulation between and on top of the joists. With this method loft insulation delivers an extremely high level of energy efficiency, with the exception of the eaves, where there is practical limit to the depth and thickness of insulation that can be installed.

Paroc pitched roof solutions create safe and sound living environments. Our insulation is durable, flexible and comes in a range of forms, all of which makes it easy to install tightly in timber frame constructions. The porosity of the material creates excellent sound insulation and non-combustibility gives the best possible protection from the fire.

Pitched roofs have always been by far the most common roof type in domestic buildings. Regardless of the type or slope of the roof, it is the most important part of the building envelope contributing to heat loss and energy efficiency. When you reduce heat loss through your roof, you need less energy to heat your entire house.

The insulation of a pitched roofed building at joist level (cold attic) represents the lowest cost method of insulating a roof. One of the least expensive ways to do this is by installing mineral wool insulation between and on top of the joists. With this method loft insulation delivers an extremely high level of energy efficiency, with the exception of the eaves, where there is practical limit to the depth and thickness of insulation that can be installed.

Paroc pitched roof solutions create safe and sound living environments. Our insulation is durable, flexible and comes in a range of forms, all of which makes it easy to install tightly in timber frame constructions. The porosity of the material creates excellent sound insulation and non-combustibility gives the best possible protection from the fire.

Renovating flat roofs (low pitched roofs)

Renovate roofs before roof leaks begin causing damage to the building envelope. Visually inspect the roof’s falls, eaves structures, roofing material, the functioning of water discharge, roof drains, penetrations and flashings. When renovating old roofs, generally follow the design and implementation guidelines for new roofs.

When you inspect the condition of the roof to be renovated, examine the condition of the old insulation layer. If there has been leakage for an extended period, remove the old insulation from the areas with excess wetness and replace it with new insulation material. If needed, level out dents in the old roof and add counter-slope layers to improve drainage. New slopes are the most successful on the top of the old roof. Use Paroc cut-to-fall solutions or, as an alternative, dry expanded clay. Here are some examples of effective roof construction renovations:
An easy and profitable way to improve the performance of old existing insulation is to install additional loft insulation. The large space between the ceiling and external roof structure makes it possible to achieve a high level of thermal insulation.
Before carrying out additional insulation work in the loft space, ensure that the existing roof structure is in good condition.