Hello fellow home builders,
My partner and I recently became proud owners of an old country house with a sizable plot of land. The ground floor is finished and was mostly renovated when we purchased the property.
Now we are starting the conversion of the attic. I have a few questions about this and would appreciate your expert advice.
So far, the attic has no insulation at all. Installing insulation is our top priority.
The wall insulation is planned as internal insulation. Exterior wall – insulation – interior cladding (gypsum boards).
The structural engineer recommended a minimum of 14cm (5.5 inches) of insulation with WLB035, with at least 4cm (1.5 inches) of ventilation space behind it for internal insulation. Air supply from below and exhaust through the cavity. I understand the basic idea behind this.
However, I’m not clear about the exact construction details.
How does the fresh air enter from below? Will there always be a visible gap between the floor covering and the drywall partition?
And can I omit a vapor barrier with a ventilation cavity? Or is the most sensible build-up exterior wall – 4cm (1.5 inches) ventilation cavity (battens) – mineral wool insulation – vapor barrier – drywall?
Unfortunately, only the extension roof has an underlay membrane installed. For most of the roof, you can look directly up at the concrete roof tiles from below.
Removing the tiles and installing an underlay membrane is hardly an option due to the effort and costs involved. I have read several times that an alternative looks like this:
Install insulation with at least 4–5cm (1.5–2 inches) of air space to the roof tiles; put the vapor barrier on the inside, followed by the interior cladding (we also want to use gypsum boards here). Essentially, this is just a ventilated roof build-up. Does anyone have experience with this? The roof pitch is 42°.
Many thanks in advance to everyone who can help.
My partner and I recently became proud owners of an old country house with a sizable plot of land. The ground floor is finished and was mostly renovated when we purchased the property.
Now we are starting the conversion of the attic. I have a few questions about this and would appreciate your expert advice.
So far, the attic has no insulation at all. Installing insulation is our top priority.
The wall insulation is planned as internal insulation. Exterior wall – insulation – interior cladding (gypsum boards).
The structural engineer recommended a minimum of 14cm (5.5 inches) of insulation with WLB035, with at least 4cm (1.5 inches) of ventilation space behind it for internal insulation. Air supply from below and exhaust through the cavity. I understand the basic idea behind this.
However, I’m not clear about the exact construction details.
How does the fresh air enter from below? Will there always be a visible gap between the floor covering and the drywall partition?
And can I omit a vapor barrier with a ventilation cavity? Or is the most sensible build-up exterior wall – 4cm (1.5 inches) ventilation cavity (battens) – mineral wool insulation – vapor barrier – drywall?
Unfortunately, only the extension roof has an underlay membrane installed. For most of the roof, you can look directly up at the concrete roof tiles from below.
Removing the tiles and installing an underlay membrane is hardly an option due to the effort and costs involved. I have read several times that an alternative looks like this:
Install insulation with at least 4–5cm (1.5–2 inches) of air space to the roof tiles; put the vapor barrier on the inside, followed by the interior cladding (we also want to use gypsum boards here). Essentially, this is just a ventilated roof build-up. Does anyone have experience with this? The roof pitch is 42°.
Many thanks in advance to everyone who can help.
Regarding interior insulation, I recommend consulting a true expert. Interior insulation can be very critical when it comes to issues like mold and humidity.
Roof: fill the space between the beams with mineral wool, leaving a 2cm (0.8 inch) gap to the roof tiles. Then, nail beams or battens across on top and fill the space there again. After that, install a climate membrane and gypsum board. Done.
As a general rule for insulation: the more, the better.
Regarding heat protection: mass is power.
Roof: fill the space between the beams with mineral wool, leaving a 2cm (0.8 inch) gap to the roof tiles. Then, nail beams or battens across on top and fill the space there again. After that, install a climate membrane and gypsum board. Done.
As a general rule for insulation: the more, the better.
Regarding heat protection: mass is power.
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