If you have a property that wasn't renovated to actually be a duplex, you probably just have 1/2» drywall on the ceiling with empty
joist cavities.
I first filled
the joist cavities with sound insulation (Roxul Safe n Sound is good because it is also fire rated, there's also a pink insulation for sound that is cheaper but not fire rated).
Not exact matches
The rim
joist is insulated with
cavity insulation on the interior and the slab is left uninsulated.
The rim
joist is insulated with
cavity insulation on the interior.
1 Oscar Baldry getting down to work in the old newsagent's shop; 2 laying Kingspan and Ecotherm insulation in the ground floor of the old shop; 3 first floor metal web
joist detailing, with membrane behind the
joists for airtightness; 4 ground floor walls feature 50 mm Xtratherm internal insulation; 5 this is followed inside by an Intello vapour control barrier and a further 25 mm Xtratherm; 6 the new timber frame first - floor twin - stud walls and roof rafters are of a fully breathable construction and full - filled with Warmcel cellulose insulation; 7 holes in the timber - frame where the Warmcel insulation was pumped in; 8 a pro clima Intello membrane on the inside of the first - floor walls and roof; 9 and finally, 50 mm Thermafleece (sheep wool) lined service
cavity to the interior.
The walls included deep
cavity walls insulated with dense - packed cellulose (double stud and I -
joist),
cavity walls with exterior insulation (polyisocyanurate, XPS, and mineral wool), a ccSPF wall (with 2 × 8 studs), and a «datum» or baseline comparison wall (2 × 6 with
cavity insulation)...
The walls consist of 1 1/2» XPS rigid insulation and R - 19 cellulose insulation in the stud
cavities, with 2» of closed - cell spray foam insulation at the rim
joist.
The lean to roof includes 225 timber
joists, which were pumped with cellulose insulation; an Ampac Ampatop Protecta membrane & tapes; and a 100 mm service
cavity with Sheep Wool Insulation inside the airtight layer
(clockwise from top left) The ground floor features 400 mm Kore EPS insulation under 100 mm reinforced concrete slab; a Siga Majpell vapour control and airtight layer protects the building against excessive moisture penetration; the 45 mm service
cavity fulfilled with mineral wool insulation; airtight detailing to prevent the
joist ends causing avoidable infiltration; Ampatop Protecta plus membrane fitted to the roof; the timber frame structure coming together
Roof: Rheinzink Prepatina graphite grey double standing seam onto 22 mm plywood sheeting, on 44 mm battens fixed through to
joists, on Ampatop Protecta plus roof membrane, on 500 mm twin timber stud warm roof fulfilled with Springvale Ecobead Platinum insulation, on Siga Majpell vapour control and airtight layer, on 15 mm OSB class 3 board, on 45 mm service
cavity fulfilled with mineral wool insulation, on 12.5 mm plasterboard with 3 mm skim coat finish
Twin
joist zone pump filled with of high density cellulose insulation, with 40 mm uninsulated service
cavity and 12.5 mm plasterboard under.
The majority of home improvements in home energy efficiency come in the way of enhanced insulation — in the
cavities of walls, between
joists in attics, or around window panes — and from installing efficient fixtures and appliances.