Hello everyone,
We are planning the following roof/upper floor structure (townhouse with a hipped roof):
- Concrete slab instead of a wooden frame on the upper floor
- Insulation on top of the concrete slab
- NO roof insulation
--> Our general contractor also offered us a wood fiber board with a thickness of 35mm (about 1.4 inches) (this is probably the board placed under the roof underlay membrane?).
Reason: In case a roof tile is damaged during a storm and it rains, our entire attic space would not be flooded right away.
Cost for this wood fiber board: €4,000.
What do you think? Is this board necessary?
We are planning the following roof/upper floor structure (townhouse with a hipped roof):
- Concrete slab instead of a wooden frame on the upper floor
- Insulation on top of the concrete slab
- NO roof insulation
--> Our general contractor also offered us a wood fiber board with a thickness of 35mm (about 1.4 inches) (this is probably the board placed under the roof underlay membrane?).
Reason: In case a roof tile is damaged during a storm and it rains, our entire attic space would not be flooded right away.
Cost for this wood fiber board: €4,000.
What do you think? Is this board necessary?
Grundbuch schrieb:
The underlay membrane can then be omitted. Using both is redundant. The underlay membrane would also be unnecessary if wood fiber boards are chosen.
Lumpi_LE schrieb:
In case of brick damage, the underlay membrane is there, not an additional insulation.
For 4000€ (about $4,400), I can think of much better options. The benefit is close to zero. Yes, I basically agree. Roof insulation doesn’t offer me any advantage compared to insulating the ceiling of the upper floor. Besides, roof insulation is more expensive. The question is whether we should use wood fiber boards instead of the underlay membrane. But I also suspect the extra cost isn’t justified.
Tolentino schrieb:
Well, you do have the advantage of being able to store temperature-sensitive items there. Whether it’s worth the extra cost is something you need to consider.Yeah, that’s true, you do have that advantage. Since we have a basement, we actually plan to store as little as possible there (basically nothing that we plan to access in the next few years). I don’t think it makes sense for us directly.
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