Breathable Roofing Felt Problems

Hi do you need to cut a hole under the roof tile vent even if the felt is breathable.

Breathable roofing felt problems.

On the other hand the breathable roofing membrane which is often selectively permeable are unable to completely ward off the effects of dampness in ceilings. Breathable roof membranes have been designed to combat the issue of condensation. This reduces the condensation problem as water vapour can evaporate through the membrane. Condensation in the roof space usually occurs because the roofing felt is impermeable and therefore does not let moisture escape.

With a breathable membrane. It can cause serious issues including breathing problems frost damage and even structural damage. In the 1980s breatheable membranes were introduced as a replacement for roofing felt. This can see water droplets accumulate and fall onto the top of the ceiling below causing damp.

Roofing roof vent problems and condensation in loft space. Therefore it has no capacity to allow moisture to leave the roof. Breathable membrane allows an insulated building to release surplus moisture vapour into the air. Any advice on what do to do to prevent condensation in the loft.

Impermeable felt was introduced in the 1930s with breathable membranes following in the 1980s. Despite its benefits older style roofing felt can contribute to an unwanted side effect condensation in the roof which can lead to the rotting of timbers and damp appearing on ceilings. 4 1 it is often wrongly assumed that the breathable membrane is a straightforward replacement for the sarking or more traditional roofing felt normally used to the roof structure and once fitted there is no need to ventilate the roof space. Many property owners and tenants face the problem of damp in buildings.

Roofing felt is impermeable to water so it will not allow moisture to escape from the roof. Just had roof felt and tiles replaced and roof felt is sopping wet. Condensation can be caused by small things as simple as cooking without a lid drying clothes and even breathing and condensation build up over time can lead to greater issues.