Tollerances

Ground bearing floor infil

600mm max

Packing under sole plates

No more than 5mm

First joist to wall face

25-75mm

Floor expansion gap

10mm minimum

Intermediate expansion gap first floor

2mm per linear meter

Plywood panel floor expansion gap

1.5-2mm

Min clearance between glass edge and window frame

5mm

IGU edge clearance

3mm

Min edge cover to keep spacer below sight line and protect edge seal

12mm

Masonry - straightness in plan

8mm over 5m

Masonry - straightness in section

8mm up to 3m storey height

Masonry - plumb

8mm per storey up to 3m, 12mm total for taller walls

External reveals

4mm over 1m

Bed joint straightness

8mm over 5m

Bed joint thickness variation

1.5mm over 8 successive joints

Perpendicular joint alignment

15mm over 5 courses

Render flatness

4mm vertical and horizontal over 5m

Render cracks

Less than 2mm deep and 0.2mm wide

Curtain walling

2mm over storey height, 5mm overall

Rainscreen cladding

3mm across any storey height or structural bay width

Plastering and dry lining

3mm with a 450mm straight edge with equal offsets

Internal wall flatness

3mm with 2m straight edge with equal offsets

Internal walls plumb

8mm to 3m storey height. 12mm for taller

Ceiling level

3mm per 1m of ceiling up to 6m across

20mm max if over 6m across

Ceiling flatness

5mm to 2m level with equal offsets

Corner - external

5mm in 250mm

10mm in 500mm

Corners - Internal

5mm in 250mm

10mm in 500mm

Boxings

10mm deviation from square in 500mm

Sill flatness

3mm in every 2m

Heads and cills

3mm up to 1.5m

5mm where longer

Internal reveal plumb

3mm up to 1.5m

5mm where higher

Internal openings - Squareness

5mm up to 250mm deep

Sill level across reveal

3mm max across length

Window frames plumb

3mm up to 1.5m

5mm where higher

Internal door frames plumb

5mm max out of plumb one direction only

internal door jamb/ head gap

4mm max

Internal door distortion

5mm across height

3mm across width

Internal door - underside gap

10-22mm from unfinished floor

Internal door - finished floor

10mm gap

External door frames plumb

5mm max in one direction only

External door - distortion

5mm across height

3mm across width

Floors - level

3mm per 1m up to 6m across

20mm max if over 6m

Floor - Flatness

5mm with 2m level with equal offsets

Glazing - fine scratches

No more than 25mm long

Tile finishes - surface variation

3mm across 2m level with equal offsets

Adjacent floor tile level difference

1mm where joint less than 6mm

2mm where joint more than 6mm

Garage blockwork cracks

Up to 2mm wide

Drives and paths flatness

10mm across 2m level with equal offsets

Temporary standing water 1 hour after rain stops should not exceed….

5mm deep and 1m2