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(1) These Regulations may be cited as the Building Standards (Scotland) Amendment Regulations 1987, and the Building Standards (Scotland) Regulations 1981 to 1986 and these Regulations may be cited together as the Building Standards (Scotland) Regulations 1981 to 1987.
(2) These Regulations shall come into force on 21st September 1987.
In these Regulations, unless the context otherwise requires–
(a) “the building standards regulations” means the Building Standards (Scotland) Regula tions 1981 and other words and expressions have the same meaning as in the said Regulations;
(b) any reference to a Part, regulation, Table or Schedule shall be construed as a reference to a Part or regulation of, or Table or Schedule to, the building standards regulations.
In relation to the granting of a warrant for the construction or change of use of a building where application therefor was made before the date of coming into force of these Regulations, and in relation to any subsequent extension of the period of validity of such a warrant or amendment of its terms, these Regulations shall not be treated as having amended the building standards regulations for the purpose of construing the words “building standards regulations” in sections 4B(1) and (2), 6(2), (3), (3A), (7) and (8), 6AA, 6A, 9(2A) and 10 of the Building (Scotland) Act 1959 .
The building standards regulations shall be amended in accordance with these Regula tions.
(1) In regulation A5(1)–
(a) the entries for the following terms shall be deleted:–
the second definition of APARTMENT, and
STANDARD IMPACT METHOD;
(b) in the first definition of APARTMENT, the words “except in regulation H4” shall be deleted.
(2) For Part H there shall be substituted Part H as set out in Schedule 1 to these Regulations.
(3) For regulation Q5(9) there shall be substituted–
(9) The hot water supply to every shower bath, whether provided to meet this regulation or not, shall be by means of either an instantaneous electric water heater which complies with BS 3456: Section 3.9: 1979 or a valve which complies with BS 1415: Part 1: 1976 or BS 1415: Part 2: 1986.
(4) In Table 1 to Schedule 2–
(a) after the entry relating to BS 1390:1972 there shall be inserted in columns (1) to (4) respectively–
(b) for the entry relating to BS 2750: 1956 there shall be substituted in columns (1) to (4) respectively–
(c) after the entry substituted by sub-paragraph (b) there shall be inserted in columns (1) to (4) respectively–
(d) after the entry relating to BS 3456: Section 2.30: 1971 there shall be inserted in columns (1) to (4) respectively–
(e) in the entry relating to BS 5628: Part 3: 1985 there shall be inserted in column (4), after the reference to Schedule 13, “Schedule 17, H3”;
(f) after the entry relating to BS 5810:1979 there shall be inserted in columns (1) to (4) respectively–
(5) In Table 2 to Schedule 2 the entry relating to CP3:Chapter III :1972 shall be deleted.
(6) In Part II of Schedule 13 the entries for Part H shall be deleted.
(7) After Schedule 16 there shall be inserted Schedule 17 as set out in Schedule 2 to these Regulations.
(8) In the Arrangement of Regulations prefacing the building standards regulations–
(a) the entry “H4 Measurement of sound transmission” and, in the entry relating to H3, the asterisk and the words “Table to regulation H3” shall be deleted; and
(b) after the entry relating to Schedule 16 there shall be inserted–
Schedule 17: Specified constructions and performance standards for resistance to the transmission of sound
(9) In Index 2 the entry “H4 Measurement of sound transmission 00” shall be deleted.
(10) In Index 3–
(a) the reference “H4” shall be deleted from the entries relating to–
Apartment, definition,
Floor, sound insulation, and
Separating floor, sound insulation;
(b) in the entries relating to “Apartment” and to “Sound insulation” the entry “measurement of sound transmission H4” shall be deleted;
(c) in the entry relating to “Separating wall”, after the entry “requirements for fire protection D5 D6 D7” there shall be inserted “sound insulation H3”.
(1) This Part shall apply only to a building or part of a building of occupancy sub-group A1 or A2.
(2) The provisions of this Part shall not be subject to specification in a notice served under section 11 of the Act (which enables local authorities to require existing buildings to conform to these regulations).
In this Part the following expressions have the meanings respectively assigned to them by regulation A5(1):–
THE ACT
BUILDING
CONSTRUCT and CONSTRUCTION
HOUSE
OPEN ACCESS BALCONY.
(1) Where a wall separates a house from any other building or where a wall or floor separates a house forming part of a building from any other part of that building, the wall or floor, as the case may be, shall be so constructed that, in conjunction with other components of the structure of the building in association therewith, it provides adequate resistance to airborne sound transmission.
(2) Where a floor situated above a house forming part of a building separates the house from any other part of that building, the floor shall be so constructed that, in conjunction with other components of the structure of the building in association therewith, it provides adequate resistance to impact sound transmission.
(3) Nothing in this regulation shall apply to any wall separating a house from an open access balcony.
(4) For the purposes of this regulation adequate resistance will be provided by constructing every separating wall or floor to which this Part applies either–
(a) in accordance with an appropriate specification in Part II of Schedule 17, or
(b) so as to attain the appropriate performance standard as set out in Part III of Schedule 17.
Brick, plastered both sides.
Mass including plaster 375 kg/m 2 .
13 mm plaster each side.
Lay bricks in a bond which includes headers.
Example: 215 mm brick, lightweight plaster, 75 mm coursing; brick density of 1610 kg/m 3 gives the required mass.
Brick, plasterboard both sides.
Mass of masonry alone 395 kg/m 2 .
12.5 mm plasterboard each side, use any normal fixing method.
Lay bricks in a bond which includes headers.
Example: 215 mm brick, 75 mm coursing, brick density of 1845 kg/m 3 gives the required mass.
Concrete block, plastered both sides.
Mass including plaster 415 kg/m 2 .
13 mm plaster each side.
Use blocks which extend to the full thickness of the wall.
Example: 215 mm block, lightweight plaster, 110 mm coursing; block density of 1840 kg/m 3 gives the required mass.
Concrete block, plasterboard both sides.
Mass of masonry alone 415 kg/m 2 .
12.5 mm plasterboard each side, use any normal fixing method.
Use blocks which extend to the full thickness of the wall.
Example: 215 mm block, 150 mm coursing; block density of 1945 kg/m 3 gives the required mass.
Concrete, in-situ or large panel.
Plaster optional.
Density 1500 kg/m 3 .
Mass (including plaster if used) 415 kg/m 2 .
Fill joints between panels with mortar.
Example: an unplastered wall of density 2200 kg/m 3 ; 190 mm thickness gives the required mass.
Two leaves of brick with 50 mm cavity, plastered on both room faces.
Mass including plaster 415 kg/m 2 .
13 mm plaster each face.
Example: 102 mm leaves, lightweight plaster, 75 mm coursing; brick density of 1845 kg/m 3 gives the required mass.
Two leaves of concrete block with 50 mm cavity, plastered on both room faces.
Mass including plaster 415 kg/m 2 .
Example: 100 mm leaves, lightweight plaster, 225 mm coursing; block density of 1990 kg/m 3 gives the required mass.
Additional constructions permitted only where a step and/or stagger is used
Two leaves of concrete block with 50 mm cavity, plasterboard on both room faces.
Mass of masonry alone 415 kg/m 2 .
12.5 mm plasterboard each face, use any normal fixing method.
Example: 100 mm leaves, 225 mm coursing; block density of 2100 kg/m 3 gives the required mass.
Two leaves of lightweight aggregate concrete block (maximum density 1500 kg/m 3 ) with 75 mm cavity, plastered on both room faces.
Mass including plaster 250 kg/m 2 .
13 mm plaster each face.
Seal the face of the blockwork with cement paint or plaster through the full width and depth of any intermediate floor.
Example: 100 mm leaves, lightweight plaster, 225 mm coursing; block density of 1105 kg/m 3 gives the required mass.
Brick.
Mass 300 kg/m 2 .
Example: 215 mm core, 75 mm coursing; brick density of 1290 kg/m 3 gives the required mass.
Concrete block.
Mass 300 kg/m 2 .
Example: 140 mm core, 100 mm coursing; block density of 2195 kg/m 3 gives the required mass.
Lightweight aggregate concrete block.
Mass 200 kg/m 2 .
Example: 140 mm core, 225 mm coursing; block density of 1405 kg/m 3 gives the required mass.
Example: 215 mm core, 150 mm coursing; block density of 885 kg/m 3 gives the required mass.
Autoclaved aerated concrete block.
Mass 160 kg/m 2 .
Example: 200 mm core, 225 mm coursing; block density of 730 kg/m 3 gives the required mass.
Two sheets of plasterboard joined by a cellular core.
Mass (including plaster finish if used) 18 kg/m 2 .
Fix to ceiling and floor only.
Tape joints between panels.
Two sheets of plasterboard.
Thickness of each sheet 12.5 mm if a supporting framework is used, or total thickness of 30 mm if no framework is used.
Stagger joints.
Timber frames, 200 mm between claddings, plus absorbent curtain in cavity.
Plywood sheathing may be used in the cavity as necessary for structural reasons.
Timber frames, masonry core, plus absorbent curtain in a cavity. Claddings 200 mm apart (ignore core). Framing must be clear of core (at least 5 mm).
This does not normally improve sound resistance, but may be useful for support and in stepped or staggered situations. There are no restrictions on type of core but the core may be connected to more than one frame.
On each side: two or more layers of plasterboard, combined thickness 30 mm, joints staggered to avoid air paths.
Unfaced mineral fibre quilt (which may be wire reinforced), density 12–36 kg/m 3 , thickness 25 mm if suspended in the cavity between frames, 50 mm if fixed to one frame, or 25 mm per quilt if one fixed to each frame.
Solid concrete slab (in-situ).
Floor screed and/or ceiling finish optional.
Mass (including any bonded screed and/or ceiling finish) 365 kg/m 2 .
Solid concrete slab with permanent shuttering. Floor screed and/or ceiling finish optional.
Mass (including shuttering only if it is solid concrete or metal, and including any bonded screed and/or ceiling finish) 365 kg/m 2 .
Concrete beams with infilling blocks.
Floor screed must be used.
Ceiling finish optional.
Mass of beams, blocks and screed (including any bonded ceiling finish) 365 kg/m 2 .
Concrete planks (solid or hollow).
Floor screed must be used.
Ceiling finish optional.
Mass of planks plus screed (including any bonded ceiling finish) 365 kg/m 2 .
Any resilient material, or material with a resilient base, with an overall uncompressed thickness of 4.5 mm. Suitable resilience will also be provided by a floor covering with a weighted impact sound improvement index (Δ Lw) of 17 as calculated in Annex A to BS 5821: Part 2: 1984. The soft covering must be bonded to the floor base.
Solid concrete slab (in-situ).
Floor screed and/or ceiling finish optional.
Mass (including any bonded screed and/or ceiling finish) 300 kg/m 2 .
Solid concrete slab with permanent shuttering.
Floor screed and/or ceiling finish optional.
Mass (including shuttering only if it is solid concrete or metal, and including any bonded screed and/or ceiling finish) 300 kg/m 2 .
Concrete beams with infilling blocks.
Floor screed and/or ceiling finish optional.
Mass of beams and blocks (including any bonded screed or ceiling finish) 300 kg/m 2 .
Concrete planks (solid or hollow).
Floor screed and/or ceiling finish optional.
Mass of planks (including any bonded screed or ceiling finish) 300 kg/m 2 .
Timber raft.
Timber boarding or wood based board, 18 mm thick and with tongued and grooved edges, fixed to 45×45 mm battens. The raft must be laid loose on the resilient layer.
Screed.
65mm cement/sand screed or 40 mm anhydrite screed, with mesh reinforcement.
25 mm mineral fibre, density 36 kg/m 3 , covering the whole area of the floor. A 13 mm thickness may be used under a timber raft if the battens used have an integral closed cell resilient foam strip.
Lay the fibre rolls tightly butted, and turned up at the edges of floating layer.
Under a timber raft, fibre may be paper faced on the underside.
Under a screed, fibre must be paper faced on upper side (to prevent screed entering the layer).
13 mm pre-compressed expanded polystyrene board (impact sound duty grade). Lay boards tightly butted, use on edge as a resilient strip at edges of floating screed.
5 mm extruded (closed cell) polyethylene foam, density 30–45 kg/m 3 . Lay with joints lapped. Turn up at edges of floating screed.
Platform floor with absorbent blanket.
Floating layer of either timber boarding or wood-based board, 18 mm thick and with tongued and grooved edges, spot bonded to substrate of 19 mm plasterboard, or two layers of cement bonded particle board, each 6 mm thick, joints staggered, glued and screwed together.
Resilient layer of 25 mm mineral fibre, density 60–80 kg/m 3 .
Floor base of 12 mm timber boarding or wood-based board nailed to timber joists (size to suit structure).
Ceiling of two layers of plasterboard, with joints staggered, total thickness 30 mm, with an absorbent blanket of 100 mm unfaced mineral fibre, density 12–36 kg/m 2 , laid on the ceiling.
Heavy ribbed floor with absorbent blanket or deafening (pugging)*.
Floating layer of timber boarding or wood-based board, 18 mm thick and with tongued and grooved edges (joints to be glued), on substrate of 19 mm plasterboard nailed to 45 mm×45 mm timber battens placed on joists.
Resilient strips of 25 mm mineral fibre, density 70–140 kg/m 3 , laid on joists.
Floor base of 45 mm timber joists.
Ceiling of either two layers of plasterboard with joints staggered, total thickness 30 mm, with an absorbent blanket of 100 mm unfaced mineral fibre, density 12–36 kg/m 3 , laid on the ceiling; or 6 mm plywood fixed under joists plus two layers of plasterboard with joints staggered, total thickness 30 mm, with deafening (pugging) of mass 50 kg/m 2 on a polyethylene liner.
Ribbed floor with heavy deafening (pugging)*.
Floating layer of timber boarding or wood-based board, 18 mm thick and with tongued and grooved edges (joints to be glued), nailed to 45 mm×45 mm timber battens placed either on or between joists.
Resilient strips of 25 mm mineral fibre, density 70–140 kg/m 3 , laid on joists.
Floor base of 45 mm timber joists.
Ceiling of either 19 mm dense plaster on expanded metal lath or 6 mm plywood fixed under the joists plus two layers of plasterboard with joints staggered, total thickness 25 mm.
Both types of ceiling to have deafening (pugging) of mass 80 kg/m 2 laid on a polyethylene liner.
*Deafening (pugging) may be of the following types:–
Traditional ash (75 mm);
2–10 mm limestone chips (60 mm);
2–10 mm whin aggregate (60 mm);
Dry sand (50 mm).
Figures in brackets show approx thickness required to achieve 80 kg/m 2 .
Do not use sand in kitchens, bathrooms, water closets or utility rooms.
Walls and floors providing adequate resistance to sound transmission are specified, arranged by construction type. For each type the critical points of workmanship are identified, any limits on use are noted, a set of specified constructions is given, and the junctions with adjoining elements are detailed.
When a construction other than a specified construction from Part II is used, the following performance standards will indicate adequate resistance to sound transmission.
The thicknesses, masses, and other dimensions quoted shall be taken as the minimum required unless otherwise stated. Greater figures are therefore permissible. Note that the timber sizes quoted are actual sizes—therefore a requirement for joists, for example, to be 45 mm wide means that if nominal sizes are used on a drawing 50 mm should be specified.
Performance of a wall or floor will be adequate if the above values are achieved when the following test programme is carried out.
Where a mass is specified for walls it is expressed in kilogrammes per square metre of wall face area ( kg /m 2 ). For floors the mass is expressed in kilogrammes per square metre on plan (kg/m 2 ).
The Building Standards (Scotland) Amendment Regulations 1987 (legislation.gov.uk, OGL v3.0). Retrieved via LawPlayer, https://lawplayer.com/uk/act/uksi-1987-1231
Contains public sector information licensed under the Open Government Licence v3.0.
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