- Joined
- 7 Apr 2024
- Messages
- 3
- Reaction score
- 0
- Country
Hello! We're doing a mix of carpet and engineered wood floor for our renovation project - it's a 1930's bungalow, so at least we only have one floor layer to worry about.
We're unwilling to pull up the floorboards to insulate from the top-down as there is plenty of space beneath the floor to work. Airflow is good and the void is generally tidy and clear.
The plan is to insulate the floor using (from the bottom up) a breathable layer, some form of insulation material (either rockwool-style or kingspan-style) and then a vapour barrier layer to protect the floor from moisture.
As we won't be pulling the floorboards up, I'm wondering if it's sensible to add our vapour barrier layer on top of the floorboards as installing it from beneath means we can't insert this layer between the joists and floorboards.
Would it be sensible to do this? We could also add an entire layer of thin plywood on top of the vapour barrier to double-down on the airtightness... Lots of ideas, no clear understanding of what the correct / most sensible approach is, so would appreciate some input and advice!
Thank you
We're unwilling to pull up the floorboards to insulate from the top-down as there is plenty of space beneath the floor to work. Airflow is good and the void is generally tidy and clear.
The plan is to insulate the floor using (from the bottom up) a breathable layer, some form of insulation material (either rockwool-style or kingspan-style) and then a vapour barrier layer to protect the floor from moisture.
As we won't be pulling the floorboards up, I'm wondering if it's sensible to add our vapour barrier layer on top of the floorboards as installing it from beneath means we can't insert this layer between the joists and floorboards.
I've read lots of different opinions and thoughts about this, and I'm swaying away from installing the vapour barrier layer from beneath to prevent moisture or spills from above ending up in the space between the barrier and the joists (see diagram). Another curiosity is whether, if we were to use our vapour barrier on top of the floorboards, could we use this as an airtight layer to get better use from our MHVR system? |
|
Would it be sensible to do this? We could also add an entire layer of thin plywood on top of the vapour barrier to double-down on the airtightness... Lots of ideas, no clear understanding of what the correct / most sensible approach is, so would appreciate some input and advice!
Thank you