Embed Size (px)
Citation preview
Page 1 of 9
Copyright is owned by Constructive Details Ltd.Copying or reproduction of the contents is not permitted without the consent of Constructive Details Ltd.
Constructive Details Ltd
Bucknalls LaneWatfordHertfordshire WD25 9BA
t: + 44 (0)1923 665300f: + 44 (0)1923 665301
e: [email protected] w: www.constructivedetails.co.uk ©2015
A handbook of thermal bridging details incorporating InstaClad insulated thermal profile
solutions
Book 8 — Cold bridging solutions for insulating on retrofit External Wall Insulation.
Prepared for InstaFibre Ltd
by the BBA
Issued: April 2015
Page 2 of 9
Table of Contents
List of Constructive Details
How to use this handbook
Details CD0107 - CD0109
Checklist
This handbook was prepared for InstaFibre Ltd and it provides thermal bridging junction details for external wall insulations. The drawings provided are for typical details and show all the elements essential in achieving the calculated c-values. All other site requirements and all relevant building regulations must be taken into consideration when implementing the details.
The detail in this handbook includes drawings of the junction, c-values calculated by an experienced thermal modeller and a process checklist for use on site to facilitate the achievement of the calculated c-values.
A more detailed description for each section of a Constructive Detail can be found in the original Guidance Note which is located on the first page of each Constructive Detail.
Purpose of the handbook
Page 3 of 9
Detail number Detail title Page SAP Ref
CD0107 Thermo-Bead 4 E4
CD0108 Thermo-Trac 6 E5
CD0109 Thermo-Pro Fascia 8 E10
The details have been prepared taking into consideration a range of wall constructions used in the UK over the last 50 years. From this, it was deemed appropriate to use a 230 mm wall with a thermal conductivity of 3.49 W·m–1·K–1.
The c-values are provided for different thicknesses of insulation. For each band, the c-value is calculated for the worst case after considering the effect of thickness and conductivity of insulation independently. This c-value can therefore be taken for the complete range of thicknesses quoted.
In all of the details the wall finish drawn is 13 mm dense plaster. This was chosen for consistency and also as it is a common construction method.
A series of tips on interpreting the information in each Constructive Detail, is given below, starting from the first to the last page.
THERMO-BEAD THERMO-PRO FASCIA THERMO-TRAC
Please refer to www.constructivedetails.co.uk for full terms and conditions.
You may not edit or amend the contents or format or otherwise incorporate them into any other publication or work or media.
List of Constructive DetailsList of constructive details
Terms and conditions
How to use this handbook
Page 4 of 9
Notes• The External Wall Insulation System (EWIS) conductivity is between 0.030 W·m–1·K–1 - 0.044 W·m–1·K–1 .
• eachresultwascalculatedusinganinternalfinishof13mmdenseplasterwithaconductivityof 0.57 W·m–1·K–1 and an external basecoat and mesh of 6 mm with a conductivity of 1.0 W·m–1·K–1
• the maximum length of the external window reveal must be 100 mm
• a minimum window frame width of 40 mm must be used
• a50mmfixingisusedat300mmcentresalongthelengthoftheThermo-Bead.
Solid Externally Insulated Wall
Jamb with InstaClad Thermo-Bead
CD0107
This indicative guidance illustrates good practice for design and construction with respect to achieving thermal performance and air barrier continuity only. It must be implemented taking due regard of site conditions and all other requirements imposed by Building Regulations.
Calculated ψ-values for this detail
All values are in W·m–1·K–1
EWIS Insulation between 90 mm - 160 mm
EWIS Insulation between 161 mm - 230 mm
EWIS Insulation between 231 mm - 300 mm
c-value (W·m–1·K–1)
Temperature Factor
c-value (W·m–1·K–1)
Temperature Factor
c-value (W·m–1·K–1)
Temperature Factor
No Thermo-Bead 1.006 0.71 1.025 0.71 1.036 0.71
Thermo-Bead 0.208 0.93 0.218 0.93 0.223 0.93
10 mm Aerogel
10 mm overlapwiith frame
internalwindowreveal
40 mm frame
externalwindowreveal
Page 5 of 9
Notes (include details of any corrective action)
CD0107
Guidance checklist
Date: ........................................... Site manager/supervisor: ......................................................................................
Site name: ........................................................................................... Plot No: ........................................................
Ref. Item Yes/No Inspected (initials and date)
1. Is the EWIS insulation thickness between 90 mm - 300 mm?
2. Is the EWIS insulation conductivity between 0.030 - 0.044 W·m–1·K–1 ?
3. Hasaninternalfinishbeenapplied?
4. HasanexternalfinishbeenappliedtotheEWISinsulation?
5. HastheThermo-beadinsulatedprofilebeenused?
6. Is the length of the external window reveal < 100 mm?
7. Is the window frame width 40 mm?
8. Arethe50mmfixingsappliedat> 300 mm centres?
.......................................
.......................................
.......................................
.......................................
.......................................
Solid Externally Insulated Wall
Jamb with InstaClad Thermo-Bead
Copyright is owned by Constructive Details Ltd.Copying or reproduction of the contents is not permitted without the consent of Constructive Details Ltd.
Constructive Details Ltd
Bucknalls LaneWatfordHertfordshire WD25 9BA
t: + 44 (0)1923 665300f: + 44 (0)1923 665301
e: [email protected] w: www.constructivedetails.co.uk ©2015
.......................................
.......................................
.......................................
Page 6 of 9
Notes• The External Wall Insulation System (EWIS) conductivity between 0.030 W·m–1·K–1 - 0.044 W·m–1·K–1 .
• eachresultwascalculatedusinganinternalfinishof13mmdenseplasterwithaconductivityof 0.57 W·m–1·K–1 and an external basecoat and mesh of 6 mm with a conductivity of 1.0 W·m–1·K–1
• maximumconcretefloorslabthicknessof150mmwithaconductivityof1.75W·m–1·K–1
• external wall insulation to be a maximum of 150 mm from ground level
• ensure the dpm provided with the Thermo-Trac is applied as per manufacturers instructions.
Solid Externally Insulated WallConcretegroundbearingfloor—Insulation below slab with InstaClad Thermo-TracCD0108
This indicative guidance illustrates good practice for design and construction with respect to achieving thermal performance and air barrier continuity only. It must be implemented taking due regard of site conditions and all other requirements imposed by Building Regulations.
Calculated ψ-values for this detailThese results can be achieved with a wall U value < 0.30 W·m–1·K–1.
All values are in W·m–1·K–1
Floor U value between 0.08 and 0.11 W·m–2·K–1
Floor U value between 0.12 and 0.19 W·m–2·K–1
Floor U value between 0.20 and 0.30 W·m–2·K–1
c-value (W·m–1·K–1)
Temperature Factor
c-value (W·m–1·K–1)
Temperature Factor
c-value (W·m–1·K–1)
Temperature Factor
No Thermo-Trac 1.515 0.59 1.487 0.59 1.426 0.59
Thermo-Trac 1.304 0.64 1.269 0.64 1.189 0.65
Thermo-Tracmaximumfloorslab of 150 mm
insulation below slab
damp proof membrane (dpm)
Page 7 of 9
Notes (include details of any corrective action)
CD0108
Guidance checklist
Date: ........................................... Site manager/supervisor: ......................................................................................
Site name: ........................................................................................... Plot No: ........................................................
Ref. Item Yes/No Inspected (initials and date)
1. Is the EWIS insulation thickness between 90 mm - 300 mm?
2. Is the EWIS insulation conductivity between 0.030 - 0.044 W·m–1·K–1 ?
3. Hasaninternalfinishbeenapplied?
4. HasanexternalfinishbeenappliedtotheEWISinsulation?
5. Is the concretefloorslab< 150 mm with a conductivity < 1.75 W·m–1·K–1?
6. Is the EWIS insulation < 150 mm from ground level?
7. Has the DPM provided with the Thermo-Trac applied as
per manufacturers instructions?
8. HastheThermo-Tracprofilebeenused?
.......................................
.......................................
.......................................
.......................................
.......................................
Below EWIS Insulation thermal bridge junction
InstaClad Thermo-Trac
Copyright is owned by Constructive Details Ltd.Copying or reproduction of the contents is not permitted without the consent of Constructive Details Ltd.
Constructive Details Ltd
Bucknalls LaneWatfordHertfordshire WD25 9BA
t: + 44 (0)1923 665300f: + 44 (0)1923 665301
e: [email protected] w: www.constructivedetails.co.uk ©2015
.......................................
.......................................
Page 8 of 9
Notes• The External Wall Insulation System (EWIS) conductivity between 0.030 W·m–1·K–1 - 0.044 W·m–1·K–1
• eachresultwascalculatedusinganinternalfinishof13mmdenseplasterwithaconductivityof 0.57 W·m–1·K–1 and an external basecoat and mesh of 6 mm with a conductivity of 1.0 W·m–1·K–1
• a maximum ceiling insulation thickness of 600 mm
• a maximum ceiling insulation conductivity of 0.044 W·m–1·K–1 was used
• two50mmfixingsshouldbeusedat600mmcentres.
Solid Externally Insulated Wall
Pitchedroof.Eaves—Insulationatceilinglevel—VentilatedloftwithInstaCladThermo-ProFasciaCD0109
This indicative guidance illustrates good practice for design and construction with respect to achieving thermal performance and air barrier continuity only. It must be implemented taking due regard of site conditions and all other requirements imposed by Buiding Regulations.
Calculated ψ-values for this detail
All values are in W·m–1·K–1
EWIS Insulation between 90 mm - 160 mm
EWIS Insulation between 161 mm - 230 mm
EWIS Insulation between 231 mm - 300 mm
c-value (W·m–1·K–1)
Temperature Factor
c-value (W·m–1·K–1)
Temperature Factor
c-value (W·m–1·K–1)
Temperature Factor
No Thermo-Pro 1.033 0.67 1.055 0.68 1.067 0.68
Thermo-Pro 0.419 0.85 0.435 0.87 0.444 0.88
10 mm Aerogel
maximum ceiling insulation of 600 mm with a conductivity of
0.044 W·m–1·K–1
ceiling insulation tofillto edge of eaves.
Page 9 of 9
Notes (include details of any corrective action)
CD0109
Guidance checklist
Date: ........................................... Site manager/supervisor: ......................................................................................
Site name: ........................................................................................... Plot No: ........................................................
Ref. Item Yes/No Inspected (initials and date)
1. Is the EWIS insulation thickness between 90 mm - 300 mm?
2. Is the EWIS insulation conductivity between 0.030 - 0.044 W·m–1·K–1 ?
3. Hasaninternalfinishbeenapplied?
4. HasanexternalfinishbeenappliedtotheEWISinsulation?
5. HastheThermo-Profasciainsulatedprofilebeenused?
6. Is the ceiling insulation thickness < 600 mm?
7. Is the ceiling insulation conductivity < 0.044 W·m–1·K–1 ?
8. Havetwo50mmfixingsappliedat> 300 mm centres?
.......................................
.......................................
.......................................
.......................................
.......................................
Solid Externally Insulated Wall
Pitchedroof.Eaves—Insulationatceilinglevel—VentilatedloftwithInstaCladThermo-ProFascia
Copyright is owned by Constructive Details Ltd.Copying or reproduction of the contents is not permitted without the consent of Constructive Details Ltd.
Constructive Details Ltd
Bucknalls LaneWatfordHertfordshire WD25 9BA
t: + 44 (0)1923 665300f: + 44 (0)1923 665301
e: [email protected] w: www.constructivedetails.co.uk ©2015
.......................................
.......................................
.......................................
