25mm Black Foil Faced Knauf Rocksilk RS45 Insulation Slab is a non-combustible rock mineral wool black foil backed insulation slab with an excellent class A1 fire performance.

Knauf RS45 1200mm x 600mm x 25mm black foil backed slab provides outstanding fire, thermal and acoustic performance for both new build and refurbishment projects.

Black Foil Faced RS45 Insulation Slab is a fire-resistant insulation solution designed for concrete soffits and other applications where fire rating is crucial.

The black aluminium foil faced insulation slab accumulates heat on one side of the board, unlike the aluminium silver foil that reflects the heat.

Black foil backed insulation slab is less visible than the silver foil which is handy specially during the exposed and semi-exposed ceiling works.

Knauf RS45 Insulation Slab comprises a high density rock mineral wool core which is foil faced with black aluminium foil on one side.

Rocksilk RS45 Insulation Slab is an efficient insulation with a certified thermal conductivity of 0.035W/mK and manufactured with a density of 45kg/m3.

Black Foil Faced RS45 can be used as an insulation in partitions, soffits, timber and metal studs, and in between timber rafters and floor joists.

Knauf RS45 black aluminium foil faced building slabs have excellent sound absorption characteristics providing high levels of sound reduction.

These odorless, non-hygroscopic, and rot proof slabs are free of CFCs and HCFCs and will not encourage the growth of fungi, mould or bacteria.

Knauf Insulation products made with ECOSE Technology contain no formaldehyde binder, dye or artificial colours.

RS45 Building slabs are also Zero ODP and Zero GWP which makes them more eco-friendly material.

Rocksilk RS45 black foil slab is easy to cut and shape with a large bladed knife or saw.

Specification:

Thickness: 25mm

Width: 600mm

Length: 1200mm

Pack Quantity: 20

Slab Coverage: 0.72m2

Pack Coverage: 14.40m2

Finish: Black foil faced one side

Density: 45kg/m3 

R-Value: 0.70m2K/W

Thermal Conductivity: 0.035W/mK

Vapour Resistivity: 5.00MNs/g.m.

Surface Spread of Flame: Class 1 

Building Regulations: Class ‘0’ 

Fire performance: Euroclass A1 (non-combustible)

Black Foil Faced Knauf Rocksilk RS45 Features:

 · Easy to cut.

 · Easy to shape.

 · Free of CFCs and HCFCs.

 · Zero ODP and Zero GWP.

 · Rock mineral wool core.

 · Highly efficient insulation.

 · Black aluminium foil backed slab.

 · Fire-resistant insulation solution.

 · Excellent class A1 fire performance.

 · Designed mainly for concrete soffits.

 · Provides outstanding fire performance.

 · Manufactured with a density of 45kg/m3.

 · Providing high levels of sound reduction.

 · Provides outstanding thermal performance.

 · Excellent sound absorption characteristics.

 · Provides outstanding acoustic performance.

 · Certified thermal conductivity of 0.035W/mK.

 · Odorless, non-hygroscopic, and rot proof slab.

 · Provides from 30 up to 240 minutes of fire protection.

 · Suitable for both new build and refurbishment projects.

 · Suitable for  applications where fire rating is crucial.

 · Contain no formaldehyde binder, dye or artificial colours.

Knauf RS45 (Black Foil Backed) Slab Installation Guidelines:

 · Black Foil Faced Slab can be rapidly installed onto rectangular and square steel ductwork using a combination of stud welded pins and steel washers.

 · All board abutments and cross joints must be covered with aluminium foil tape.

 · Black Foil Faced Slab is easily cut with a hand saw or alternatively a circular/table saw.

 · The top and bottom slabs should be cut 10mm wider than the width of the duct to ensure a tight cross joint with the side slabs.

 · The side slabs should be cut to the height of the duct (H) + 2 x the insulation thickness.

 · When installed within horizontal applications the top boards do not require any stud welded pins and are simply positioned onto the duct with all board joints bonded with the glue.

 · Board joints must be covered using foil tape.

 · The side wall slabs are installed using stud welded pins with 350mm maximum centres along the length of the duct and 400mm centres across the depth.

 · Side wall slabs must overlap the top and bottom boards.

 · All cross joints must be bonded with the glue.

 · Ensure that there is a strong bond between the welded pin and the duct, always ensure that the welded pin is sufficiently isolated from the foil surface of the insulation during welding.

 · Install the base slabs with stud welded pins at a maximum of 350mm centres along the length of the duct and 300mm centres across the width of horizontal ducts and 450mm across the width of vertical ducts.

 · Where the Black Foil Faced Slab bypasses a flange, drop rod hanger or both, cut a notch into the insulation.

 · The insulation can easily be cut with a sharp knife or hand saw.

 · All board joints must be bonded with the glue.

 · A joint in the Black Foil Faced Slab must be accommodated at the centre point of the aperture.

 · Before applying the u-profile to the Black Foil Faced Slab, slits must be cut into the insulation to allow the profile sides to penetrate the insulation.

 · The u-profile can be attached to the ductwork using 100mm self-tapping screws.

 · Approx. 4no. to the top and bottom slabs and 2no. to the vertical slabs.

 · Once the u-profiles have been applied an insulated collar must be installed around the perimeter of the aperture.

 · The collar can be simply cut from the Black Foil Faced Slab.

 · Fix the collars in place with the glue.

 · Use nails to temporarily hold the collars in place whilst the glue cures.

 · Foil tape can be used to cover any exposed edges of the collars.

 · Maintain a 30mm gap between the ductwork and floor structure.

 · Secure the duct to the floor structure using 4no. 50 x 50 x 45 x 2.5mm galvanised steel angles to both sides of the aperture.

 · The angles can be fixed using 2no. 3.2 x 25mm self-tapping screws.

 · Alternatively, the duct can be secured with a 40 x 40 x 3mm L profile.

 · The length of the L profile should be equal to the width of the duct and installed to both sides (duct width).

 · Elbows can be protected by cutting the Black Foil Faced Slab into fan shaped segments.

 · Alternatively v-shaped slits can be cut into the back of the Black Foil Faced Slab allowing it to wrap around the elbow.

 · Fill the v-shaped channels with the glue before applying to the duct and use nails to temporarily hold the insulation in place whilst the glue cures.

 · Black Foil Faced Slab can be cut and positioned within a steel frame to form a removable cover in the location of the steel access hatch.

 · The insulated cover can be attached to the duct using 4no. M8 threaded rods ensuring the rods are secured on both sides of the duct.

 · The cover is then fixed to the rods using steel M8 nuts and washers.

 · The thickness of insulation should be appropriate to the fire resistance required.

*Further information may be found in our Downloads section.

Fairly easy access to all PDF files.

Datasheet ǀ Declaration of Performance - DoP ǀ BBA Certificate ǀ Installation Guide ǀ Certificates ǀ Brochure ǀ SPEC Sheet 

*Special Product - Non returnable cancelable.