Do you know what is Breathable membrane and why it is so crucial to use it in timber buildings when insulating walls, floor and roof?

Lets explain why it is important to use a breathable membranes.
Many property owners and tenants face the problem of damp in buildings. It can cause serious issues, including breathing problems, frost damage and even structural damage. Breathable membrane allows an insulated building to release surplus moisture vapor into the air. This keeps the structures secure and dry.

How does breathable membrane work?

Breathable membranes are water-resistant (as well as resistant to snow and dust), but air-permeable. Good to add is that one side of the membrane can allow airing and moister to pass through and other side doesn’t. You would usually use them within external wall and roof structures in which the exterior cladding may not be completely water-tight or moisture-resistant, such as in tiled roofs or framed wall constructions. The membrane is located on the cold side of the insulation. It prevents moisture that may have been getting through the external cladding from piercing further into the structure. However, their air-permeability allows the structure to be ventilated, avoiding the accumulation of condensation. On the other hand, when insulating for example log cabin walls it is recommended to use two membranes! Why? First membrane, cold side of the insulation will prevent moisture, wind to pass through and the second membrane after insulation will prevent insulation particles from entering log cabin trough cladding. The scientist has researched that some insulation like fiberglass cause cancer!

If you used no membrane, then the water would condensate and start to drip down through the structure. Over time, this would weaken the structure and make it look unappealing. It would also cause damp problems further down the line.

In addition to the above, breathable membranes can be used to improve the thermal properties of a structure. They can provide short-term protection from adverse weather conditions during essential construction or repair works.

So my question is have you researched what goes into your log cabin? Or price determines all?