- Reaction score
- 259
I've always wondered how those joists manage to carry all that new insulation they stick up there nowadays :carolers:
"Hello Amp David",
You might remember [as You replied to Me] that I enquired about Electrical Cables being affected by Loft Insulation prior to one of My Relatives having their Loft Insulated with 270 mm of Fibre Glass Blanket Insulation.
The Loft has been Insulated now and My Relative is disappointed with how much the Loft Space has been `diminished` in relation to what they had thought would be `Left`.
They thought that they would be able to just Lay Down some Boards on top of the Loft Insulation wherever they liked and put items onto those Boards - Until I told them that it is the Thickness / Air Space within the Thickness of the Fibre Glass Blanket Insulation that actually forms the Insulating `Barrier` - and that `Flattening` the Insulation would negate the Full effectiveness of the Insulation.
I told them to actually Insulate the area where they wanted to board for storage [Small Amount of 100 mm Blanket Insulation between Ceiling Joists ] - Board it out - and that the Loft Insulators would then Overlay the 170 mm `Top Layer` onto the Boards which My Relatives could then move to Store items - When they wanted to do so.
They did the 100 mm Insulation between the Ceiling Joists and used Loft Boards to Board an area in the Loft Space.
The Loft Insulators refused to Overlay the Boarding - Until My Relative telephoned Me and asked them to explain the reason to Me - When I explained My Profession and My Knowledge of Heat Loss / Insulation to them and told them that there was NO Reason to Refuse to Overlay the Boarding - they then reluctantly agreed to Overlay the Boarding.
I had mentioned the Difficulties of accessing areas of the Loft Space AFTER the Loft Insulation - but People don`t realise exactly HOW Difficult / Dangerous this can be until they actually SEE what the Loft looks like after it has been Insulated.
Regards,
Chris