Pitched Roof Sarking Felt

Iko enertherm alu nf pro.

Pitched roof sarking felt.

This brings us to a very important technical issue concerning pitched roof insulation and refers to proper ventilation and breathability of the construction. Previous article modern roofing at low pitches. The sarking comfort pir l board has on 1 side a wood fibre underlay board of 35 mm. Pitched roof insulation with undertile felt iko enertherm is used for the thermal insulation of pitched roofs on the rafters or on the trusses.

It acted as a protective barrier to the house before the main roof covering was constructed. The sarking plus pir l boards are already equipped with an underlay felt on 1 side. It served two main functions. Of course sarking adds a significant cost.

Click here to visit the til r website. Til r classic undertile felt is a traditional bitumen based slaters felt. The product can be used as a waterproofing coating on asphalt fibre cement sheeting concrete and bituminous roofing membranes. Ikopro solvent free water proofer is an easy to use bitumen based emulsion for roofs.

Roofing felt was introduced in the 1930s. Sarking boards are softwood boards generally about 150 mm wide that are attached to the rafters of a pitched roof to give extra strength to the overall structure of a building. For further information on how to construct a watertight sub roof download the wienerberger low pitch installation guide here. The sheeting or sarking felt is laid over the supporting rafters or counter battens and beneath the tile or slate battens.

The following insulation board is applicable. Please note that a minimum of 50mm ventilation is required under the sarking felt while a drape space should be left under a breather membrane. It also functioned as a secondary barrier to wind driven rain and snow which penetrated under the roof covering as well as potential pests like insects and birds. Next article constructing a low pitch watertight roof part 2.

Til r classic undertile felt is eligible for one warranty for scottish sarking board projects and where it is necessary to provide a safe roosting environment for bats. Thanks to the self adhesive overlap you create a wind and watertight roof in a single movement. Previously it had been standard practice to underline slate or tile roofs with a mortar filling consisting of sand lime mortar and reinforced with animal hair. Can i or should i do anything about this.

The original sarking felt on the pitched roof of my 1950 built house is brittle and in a number of places torn right through so that i can see feel the under side of the roof tiles.