Report on the Acceptance Air Leakage Testing of Rectory Cottage in Langattock, Powys, in compliance with ATTMA TSL1 (2010)

Transcription

1 Report on the Acceptance Air Leakage Testing of Rectory Cottage in Langattock, Powys, in compliance with ATTMA TSL1 (2010) Site address: Rectory Cottage, Langattock, Crickhowell, Powys NP8 1PH Test Reference No.: JA5163-T02 Test Date: 24 th March 2015 Testing carried out for: Testing carried out by: Client: Peter Blood Test Engineer: Paul Jennings Company: Aldas Contact Tel: / Contact Target Air Changes, ACH 50 Pa: 1.0 (EnerPHit) Achieved Air Changes, ACH 50 Pa: 0.63 Achieved Air Permeability, m 3 /hr/m 50 Pa: 0.62 Data consistency, r 2 (requirement, r 2 > 0.98): Slope, n (requirement, 0.5 < n < 1.0): 0.66 Aldas, 54 Melville Road, Churchdown, Gloucester, GL3 2RG Aldas is a trading name of Jennings Aldas Limited, Co. Reg Director: Clare Corley Air Leakage Specialist: Paul Jennings, BSc, MSc doorfanman@hotmail.com

2 Introduction and Setup Acceptance air leakage testing of the refurbished dwelling at Rectory Cottage, in Langattock, Powys, was carried out on the 24 th March Testing was carried out using a Retrotec 300 DucTester mounted in a window board at the rear of the ground floor. Testing was carried out in accordance with the requirements of BS EN and the BINDT Quality Procedure, in conformance with the ATTMA TSL1 standard (2010), Method B. Any queries or complaints about this test should be addressed in the first instance to the test engineer and in the second instance to BINDT. BINDT contact details: Newton Building, St. George s Avenue, Northampton NN2 6JB Tel: All external doors and windows, other than that where the test equipment was mounted, were shut for the duration of testing, whilst internal doors and walls were not yet fitted so free movement of air within the property was assured. The pictures below illustrate key parts of the equipment and test set-up used: P2) Internal view of test equipment mounted in window board in open LR window P3) External view of test equipment mounted in window board in open LR window P4) Temporary sealing of filters in MVHR unit to exclude ventilation air leakage JALDAS Airtightness Test Report: Rectory Cottage Acceptance Test Page 2 of 12

3 P5) Trap fitted beneath sink and filled with water to prevent leakage P6) Trap fitted where basin will be fitted in shower room, filled with water to prevent leakage Measurement Procedures Test procedures in accordance with the following standards: ATTMA TSL1, 2010, Method B. After a preliminary single-point depressurisation test and leakage check, two particular elements of additional sealing were carried out, followed by a full multi-point depressurisation test. This was followed by a full multi-point pressurisation test, as required for Passivhaus certification. Dwelling Volume m3 (PHI conventions) Envelope area m2 (ATTMA conventions) Rectory Cottage, Langattock, Crickhowell, Powys NP8 1PH 348 m³ 350 m² Measurements Recorded: Averages of zero flow pressure differentials were recorded before and after the test, as were internal and external temperatures, windspeed and barometric pressure. JALDAS Airtightness Test Report: Rectory Cottage Acceptance Test Page 3 of 12

4 Equipment Calibration: All test equipment and accessories are calibrated. The table below provides details of the equipment and the calibration validity for each: Retrotec 300 DucTester Serial No: 3LFT Expires 19 th February 2016 Retrotec DM2A Digital Gauge Serial No: Expires 19 th February 2016 Testo 511 Digital Barometer Serial No: /301 Expires 20 th February 2016 Testo 110 Digital Thermometer Serial No: /208 Expires 20 th February 2016 Depressurise Data Set After some permanent remedial sealing works, particularly around the base of the waste from the downstairs WC, a full multi-point depressurisation test was carried out. Date: 24 th March 2015 Time: 11:07 to 11:21 Environmental Conditions: Barometric Pressure: KPa Wind speed: 0.5 m/s Temperature: Initial: indoors 15.6 C outdoors 10.2 C Final: indoors 15.6 C outdoors 10.2 C Test Data: At least 3 static pressures taken for 10 sec each. A minimum of 10 induced pressures taken for >20 sec each. Existing Pressure Differentials (Static pressure): Baseline, initial [Pa] Baseline, final[pa] Static Pressure Averages: initial [Pa] P P 01-ve P 01+ve 0.00 final [Pa] P P 02-ve P 02+ve 0.00 Results: All results are compared to the standards set in Building Regulations Approved Document L1A Conservation of fuel and power in new dwellings (2010). Results are calculated using the formulae set out in ATTMA TSL1 (Section 3.2). Readings collected are detailed overleaf. JALDAS Airtightness Test Report: Rectory Cottage Acceptance Test Page 4 of 12

5 Reading Induced Pressure [Pa] Total flow, Q r [m 3 /h] Corrected flow, Q env [m 3 /h] Error [%] 0.6% 0.2% -0.5% 1.0% 0.5% -0.3% 0.4% -3.3% -0.3% -0.3% 0.9% 1.2% G1: Graph of imposed pressure differentials, Depressurise: JALDAS Airtightness Test Report: Rectory Cottage Acceptance Test Page 5 of 12

6 G2: Graph of imposed pressure differential against airflow, Depressuri2e: Depressurise Test Results Results Results Uncertainty Correlation, r % confidence limits Air flow at 50 Pa, Q 50 [m 3 /h] 216 +/-0.8% Intercept, C env [m 3 /h.pa n ] Permeability at 50 Pa, AP 50 [m 3 /h.m 2 ] /-1.3% Slope, n Equivalent leakage area at 50 Pa [cm 2 ] 108 +/-0.8% Air changes, n /-1.3% JALDAS Airtightness Test Report: Rectory Cottage Acceptance Test Page 6 of 12

7 Pressurize Data Set Following the depressurisation test, a full multi-point pressurisation test was carried out. Date: 24 th March 2015 Time: 11:25 to 11:40 Environmental Conditions: Barometric Pressure: KPa Wind speed: 0.5 m/s Temperature: Initial: indoors 15.6 C outdoors 10.2 C Final: indoors 14.9 C outdoors 10.4 C Test Data: At least 3 static pressures taken for 10 sec each. A minimum of 10 induced pressures taken for >20 sec each. Existing Pressure Differentials (Static pressure): Baseline, initial [Pa] Baseline, final[pa] Static Pressure Averages: initial [Pa] P P 01-ve P 01+ve 0.00 final [Pa] P P 02-ve 0.00 P 02+ve 0.30 Results: All results are compared to the standards set in Building Regulations Approved Document L1A Conservation of fuel and power in new dwellings (2010). Results are calculated using the formulae set out in ATTMA TSL1 (Section 3.2). Readings collected are detailed below: Reading Induced Pressure [Pa] Total flow, Q r [m 3 /h] Corrected flow, Q env [m 3 /h] Error [%] 0.3% -0.3% 0.6% 0.1% -0.4% -0.7% 0.8% 0.5% -1.3% -0.8% 1.0% 0.2% JALDAS Airtightness Test Report: Rectory Cottage Acceptance Test Page 7 of 12

8 G3: Graph of imposed pressure differentials, Pressurise: G4: Graph of imposed pressure differential against airflow, Pressurise: JALDAS Airtightness Test Report: Rectory Cottage Acceptance Test Page 8 of 12

9 Pressurise Test Results Results Results Uncertainty Correlation, r % confidence limits Air flow at 50 Pa, Q 50 [m 3 /h] 220 +/-0.5% Intercept, C env [m 3 /h.pa n ] Permeability at 50 Pa, AP 50 [m 3 /h.m 2 ] /-1.1% Slope, n Equivalent leakage area at 50 Pa [cm 2 ] 110 +/-0.5% Air changes, n /-1.1% Combined Test Results Results Uncertainty Air flow at 50 Pa, Q 50 [m 3 /h] 218 +/-0.7% Permeability at 50 Pa, AP 50 [m 3 /h.m 2 ] /-1.2% Equivalent leakage area at 50 Pa [m 2 ] 109 +/-0.7% Air changes, n /-1.2% Average Correlation, r n/a Average Intercept, C env [m 3 /h.pa n ] 16.0 n/a Average Slope, n 0.67 n/a JALDAS Airtightness Test Report: Rectory Cottage Acceptance Test Page 9 of 12

10 Leakage Inspection Whilst the house was depressurised, an extensive check for leakage was carried out. The following leakage sites were identified; some were addressed before full testing started. P7) Leakage at mastic joint between sections of Living Room window. Resealed before test. P8) Residual leakage through one particular electrical socket in upstairs front wall P9) Leakage found through blockwork gable end in loft space; also between blockwork and edge of last roof joist next to wall P10) Leakage found through various imperfections in blockwork wall P11) Looking vertically upwards at edge of end joist against gable wall. Leakage occurring through gap as shown. JALDAS Airtightness Test Report: Rectory Cottage Acceptance Test Page 10 of 12

11 P12) Substantial leakage through considerable gap around waste pipe connected to ground floor WC P13) Gap filled with expanding foam and then oversealed with suitable mastic, prior to carrying out acceptance test Comments & Conclusions: The results achieved, an average Air Change Rate of Pa and an average Air Permeability of Pa are excellent, meeting the EnerPHit target ( Pa) by a substantial margin. Congratulations to Craig and his team of builders. An Air Leakage Certificate has been issued, a copied of which is attached. JALDAS Airtightness Test Report: Rectory Cottage Acceptance Test Page 11 of 12

12 Air Leakage Certificate In accordance with BS EN and ATTMA TSL1 (2010) Building tested: Test Date: 24 th March 2015 Test Engineer: Certificate No: Rectory Cottage, Llangattock, Powys Paul Jennings, Aldas JALDAS5163/T02C This is to certify that the above named dwelling has been tested for air leakage in accordance with the BS EN 13829:2001 methodology and the requirements of BINDT & the Passivhaus Institute. The average (pressurisation & depressurisation) Leakage Characteristics of the dwelling were recorded as follows: Test Parameters 50 Pa: 218 m 3 /hr Air 50 Pa: 0.62 m 3 / (hr.m 2 ) Air Change 50 Pa: 0.63 AC/Hr Correlation of Results, R 2 : Slope, n: 0.67 Intercept, C env : 16.0 m 3 / (hr.pa n ) Envelope, A E : 350 m 2 Env. Calc. prepared by: Volume, V: 348 m 3 Alan Clarke & Paul Jennings Initial Offset Pressure Pa Final Offset Pressure: Pa Initial Inside Temperature: 15.6 o C Final Inside Temperature: 14.9 o C Average Outside Temperature: 11.7 o C Barometric Pressure: kpa This certificate should be read in conjunction with the report JALDAS5163 R2 and associated test method statement. Signed: Name: Paul Jennings Date Issued: 31/03/15 Position: Air Leakage Specialist Aldas, 54 Melville Road, Churchdown, Gloucester, GL3 2RG Aldas is a trading name of Jennings Aldas Limited, Co. Reg Director: Clare Corley Air Leakage Specialist: Paul Jennings, BSc, MSc doorfanman@hotmail.com