ᐅ Is Installing Wood Fiber Insulation Above Rafters a Good Solution for Uninsulated Attics?

Hello everyone,

Does adding a wood fiber insulation layer above the rafters make sense for an otherwise uninsulated attic space (above two full floors)? I’m particularly interested in heat protection, etc. The top floor ceiling is going to be insulated. Thanks.
Best regards

Hello,

this is how our roof structure looks as well.

The wood fiber insulation boards are definitely useful for heat protection – our attic isn’t exactly cool at the current temperatures, but it’s absolutely not comparable to the uninsulated attic in the old house, where in summer it often felt like being in an oven...

Best regards,

Dirk

The question is what you intend to do with the pointed roof – of course, it provides better summer heat protection, but the cost is high and the effect is limited with your (presumably tent-like) roof.

We have it on a gable roof, which also benefits the upper floor – that’s why I would always choose this option.

It will also have a gable roof, but the roof does not extend into the living space because there is a full story beneath it. The insulated house is basically a cuboid, with the gable roof on top.

OK, but that doesn’t change my opinion 😉

Is it possible to use the attic space as living area at some point in terms of dimensions?
If not, I would probably avoid adding insulation above the roof. The rafters, which act as thermal bridges, can also be insulated separately.