wetherby building systems external wall insulation detail

Wetherby Building Systems

External Wall Insulation Detail Drawings

Insulation & Silicone Render Finish

The following Wetherby EWI detail drawing set is generic and is not be used for a specific

project. Please contact Wetherby Technical to obtain a project specific detail drawing set.

WBS scrim adhesive levelling

coat 2-3mm min finished smooth

WBS silicone finish coat

(grain size and colour to clients approval)

WBS silicone primer

(colour to match silicone topcoat)

WBS scrim adhesive coat 4-6mm min

WBS approved mechanical fixing

WBS approved insulation board

(thickness to suit client requirements)

Existing substrate

WBS alkali resistant glass

fibre reinforcing mesh

drawing no. EWI-SILICONE-01

drawing. Isometric - System build up

C WBS-LTD 1998-2019. All rights reserved

date. Nov 2019 scale. ntsdrawn by. LS

drawing set. 04 Wet

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1 Kid Glove Road, Golborne Enterprise Park,Golborne, Greater Manchester, WA3 3GS

Tel: 01942 717100 Fax: 01942 717101Web: www.wbs-ltd.co.uk

E-mail: [email protected]

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30

0m

m m

ax

300mm max

300mm max

50mm

50

mm

50mm

50

mm

1200x600mm WBS

approved insulation boards

WBS approved insulation fixings

1 in each corner of the board set

in 50mm in each direction and 1

in the centre of each board

Fixings at a maximum of 300mm

centres around all openings

Window / door opening

N.B. 1 fixing per m2 must be installed

through the glass fibre mesh where

mineral fibre is the chosen insulant.

100 x 100mm scrim patch to be

applied over fixing head

Stainless steel secondary fixings are

required on all buildings 3 storeys

and above

Fixings at a maximum of 300mm

centres at building corner

Staggered insulation board

joints at building corner

30

0m

m m

ax

200x200mm glass fibre reinforcing

mesh scrim bedded in adhesive to

all window/door corners on top of

main reinforcing coat

Window / door opening

drawing. Fixing arrangement




drawing set. 04 Wet

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Ground level may vary.

Base bead to be kept

150mm above ground level.

NB: DPC must not be bridged

Existing substrate

WBS 914 series system starter track

mechanically fixed at 300mm centres





WBS silicone primer


WBS bonding agent

to be applied as specified

WBS fungicidal wash


WBS bedding adhesive


WBS 37400 PVC base profile clip with mesh


WBS scrim adhesive coat 4-6mm

min reinforced with alkali resistant

glass fibre reinforcing mesh

150m

m

drawing. Base bead detail




drawing set. 04 Wet

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Conjectured line of existing window

40

WBS EVO-STIK silicone sealant


WBS fungicidal wash


WBS bonding agent




Existing substrate



WBS silicone primer









drawing. Window cill detail




drawing set. 04 Wet

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WBS 3707 PVC corner bead

bedded into adhesive mortar

WBS APU frame seal or

WBS EVO-STIK silicone sealant at abutment

Conjectured line of existing window / door


WBS fungicidal wash


WBS bonding agent




Existing substrate



WBS silicone primer









drawing. Window / Door head detail 1 of 2


drawing no. EWI-SILICONE-05A


drawing set. 04 Wet

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Conjectured line of existing window / door


WBS EVO-STIK silicone sealant at abutment



Reduced thickness insulation board

mechanically fixed to existing substrate


WBS fungicidal wash


WBS bonding agent




Existing substrate






WBS silicone primer






drawing. Window / Door head detail 2 of 2


drawing no. EWI-SILICONE-05B


drawing set. 04 Wet

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WBS silicone primer







WBS fungicidal wash


WBS bonding agent




Existing substrate

WBS 3707 PVC corner

bead bedded into

adhesive mortar

Conjectured line of

existing window / door


WBS EVO-STIK silicone

sealant at abutment



drawing. Window / Door jamb detail 1 of 2



date. Nov 2019 scale. ntsrevision. -

drawn by. LS

drawing set. 04 Wet

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WBS silicone primer







WBS fungicidal wash


WBS bonding agent




Existing substrate

Reduced thickness

insulation board

mechanically fixed to

existing substrate

WBS 3707 PVC corner

bead bedded into

adhesive mortar

Conjectured line of

existing window / door



sealant at abutment



drawing. Window / Door jamb detail 2 of 2




drawing set. 04 Wet

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WBS fungicidal wash


WBS bonding agent




Existing substrate



WBS silicone primer









drawing. Building corner detail




drawing set. 04 Wet

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Existing substrate





WBS silicone primer


WBS bonding agent


WBS fungicidal wash










WBS reinforcing mesh at corner

(no overlaps within 300mm of corner)



drawing. Internal building corner detail




drawing set. 04 Wet

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WBS PVC movement joint

located using 'firtree' fixings

at maximum 300mm centres




WBS silicone primer




WBS scrim adhesive coat 4-6mm min

reinforced with alkali resistant glass

fibre reinforcing mesh (mesh must

run into movement joint flanges)

WBS fungicidal wash


WBS bonding agent




Existing substrate



6mm channel cut through insulation

drawing. Movement joint detail




drawing set. 04 Wet

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WBS fungicidal wash


WBS bonding agent




Existing substrate

WBS scrim adhesive levelling coat

2-3mm min finished smooth

WBS silicone primer









drawing. Roof abutment detail




drawing set. 04 Wet

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Line of barge board/fascia board

subject to site conditions


WBS fungicidal wash


WBS bonding agent




Existing substrate



WBS silicone primer







40




Powder coated aluminium

flashing bedded on sealing

tape and mechanically fixed

at max 300mm centres

WBS sealing tape

drawing. Verge trim detail 1 of 2




drawing set. 04 Wet

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WBS fungicidal wash


WBS bonding agent




Existing substrate



WBS silicone primer







40







WBS sealing tape

drawing. Verge trim detail 2 of 2




drawing set. 04 Wet

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Timber treated ground

fixed back to substrate


WBS fungicidal wash


WBS bonding agent




Existing substrate



WBS silicone primer










NB: Fixing into pattress

must be silicone sealed to

ensure water tightness

drawing. Timber pattress detail




drawing set. 04 Wet

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WBS EVO-STIK

silicone sealant

at abutment

WBS 3707 PVC corner

bead bedded into

adhesive mortar




WBS silicone primer







WBS fungicidal wash


WBS bonding agent




Existing substrate



drawing. Party wall detail 1 of 2




drawing set. 04 Wet

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WBS full depth stop bead

bedded on WBS EVO-STIK

silicone sealant, mechanically

fixed at 300mm centres




WBS silicone primer







WBS fungicidal wash


WBS bonding agent




Existing substrate



drawing. Party wall detail 2 of 2




drawing set. 04 Wet

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Vent cover securely fixed and bedded

on WBS EVO-STIK silicone sealant



WBS fungicidal wash


WBS bonding agent




Existing substrate



WBS silicone primer









drawing. Air vent detail




drawing set. 04 Wet

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WBS 914 series system starter track mechanically

fixed at 300mm centres through the exisitng flashing


Lead flashing to be dressed

behind bellcast bead

Roof covering


WBS fungicidal wash


WBS bonding agent




Existing substrate



WBS silicone primer









drawing. Roof junction detail 1 of 2




drawing set. 04 Wet

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Lead flashing to be dressed

behind bellcast bead

Flat roof


WBS fungicidal wash


WBS bonding agent




Existing substrate



WBS silicone primer









WBS 914 series system starter track mechanically

fixed at 300mm centres through the exisitng flashing

drawing. Roof junction detail 2 of 2




drawing set. 04 Wet

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40


Powder coated aluminium flashing or

PVC overcill bedded on WBS EVO-STIK

silicone sealant and mechanically fixed

at max 300mm centres. Gauge of cill

and fixing arrangement to suit site

conditions and client requirements


WBS fungicidal wash


WBS bonding agent




Existing substrate



WBS silicone primer










drawing. Overcill detail




drawing set. 04 Wet

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40

Powder coated aluminium undercill

bedded on WBS EVO-STIK silicone

sealant and mechanically fixed at

max 300mm centres. Gauge of cill

and fixing arrangement to suit site

conditions


WBS fungicidal wash


WBS bonding agent




Existing substrate



WBS silicone primer











drawing. Undercill detail




drawing set. 04 Wet

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WBS mineral fibre fire barrier

dubbed out to main insulant

WBS alkali resistant glass fibre scrim

bedded into dubbing coat, overlapping

main insulant by 100mm min

WBS stainless steel fire break fixing

with retaining washer

200mm WBS mineral fibre fire barrier,

10mm less than main insulant


WBS fungicidal wash


WBS bonding agent




Existing substrate



WBS silicone primer







200



drawing. Fire barrier detail




drawing set. 04 Wet

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WBS fungicidal wash


WBS bonding agent




Existing substrate



WBS silicone primer









Pipe

WBS EVO-STIK silicone sealant installed

between pipe and render system

drawing. Pipe detail




drawing set. 04 Wet

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WBS full depth stop bead bedded on

WBS EVO-STIK silicone sealant,


Existing gas

supply pipe




WBS silicone primer







WBS fungicidal wash


WBS bonding agent




Existing substrate



Distance to be specified by utility

company and agreed with client

drawing. Gas pipe detail (1 of 2)




Wet

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E-mail: [email protected] set. 04

revision. -

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WBS silicone primer







WBS fungicidal wash


WBS bonding agent




Existing substrate


Purpose made WBS PPC Aluminium

frame and ventilated cover

Existing gas

supply pipe



Distance to be specified by utility

company and agreed with client

drawing. Gas pipe detail (2 of 2)




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WBS silicone primer







WBS fungicidal wash


WBS bonding agent




Existing substrate

WBS full depth stop bead bedded on

WBS EVO-STIK silicone sealant,


Existing gas / electric meter box



drawing. Service box detail




Wet

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Powder coated aluminium flashing


WBS fungicidal wash


WBS bonding agent




Existing substrate



WBS silicone primer







40mm min



drawing. Parapet detail




drawing set. 04 Wet

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WBS 3794 PVCu balcony drip profile


to be applied to soffit


WBS fungicidal wash


WBS bonding agent




Existing substrate



WBS silicone primer









drawing. Soffit detail




drawing set. 04 Wet

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WBS mechanical fixing

for aluminium profile

WBS powder coated aluminium profile

(731 series profile shown)

WBS push to fit end cap sealed in place

with WBS EVO-STIK silicone sealant

WBS full system end cap sealed in place


WBS jointing piece sealed in place


WBS jointing piece sealed in place


Powder coated aluminium flashing bedded

on WBS sealing tape and secured back to

existing substrate at 300mm cts providing

a 40mm min drip. Gauge of cill and fixing

arrangement to suit site conditions and

client requirements


& Silicone render system


drawing. Trims & flashings detail




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WBS 914 series system starter track



WBS will not guarantee

any product below dpc

Edge of structure and

dpc to clients details



WBS fungicidal wash


WBS bonding agent




Existing substrate



WBS silicone primer







Ground level 'to fall' away from building

WBS extruded polystyrene (XPS)

insulation board below DPC level

WBS scrim adhesive coat 6mm min

reinforced with alkali resistant glass

fibre reinforcing mesh finished flat

Bitumen paint



drawing. DPC detail




drawing set. 04 Wet

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Existing natural

draught balance flue

600m

m

WBS corner bead fixed

at 300mm centres

Existing flue

30

0m

m

Existing substrate

WBS silicone finish





drawing. Flue detail (1 of 3)




drawing set. 04 Wet

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N.B. 600mm minimum clearance required

around natural draught balance flue

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Existing flue

300mm


sealant at abutment

WBS 3707 PVC corner

bead bedded into

adhesive mortar




WBS silicone primer







WBS fungicidal wash


WBS bonding agent




Existing substrate







drawing set. 04 Wet

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30

0m

m


40





WBS sealing tape

Existing flue

300

mm



Existing substrate





WBS silicone primer


WBS bonding agent


WBS fungicidal wash











sealant at abutment



drawing no. EWI-SILICONE-25C


drawing set. 04 Wet

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WBS mineral fibre fire barrier

dubbed out to main insulant

WBS alkali resistant glass fibre scrim

bedded into dubbing coat, overlapping

main insulant by 100mm min

WBS approved fire break fixing

200mm WBS mineral fibre fire barrier,

10mm less than main insulant


WBS fungicidal wash


WBS bonding agent




Existing substrate


coat 2-3mm finished smooth

WBS silicone primer

(colour to clients approval)




reinforced with alkali resistant


20

02

00

Fire rated silicone sealant

Fire rated silicone sealant

Existing flue / vent



drawing. Extended flue detail




drawing set. 04 Wet

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wetherby building systems external wall insulation detail

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