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<br /> WSEC SECTION R402.4 AIR BARRIER REQUIREMENT �' Q�
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<br /> The building thermal envelope shall be constructed to limit air leakage. Each dwelling unit PER 2015 WASHINGTON STATE ENERGY CODE R402.4 A CONTINUOUS AIR BARRIER ' a�, ��
<br /> shall be tested and verified as having an air leakage rate of not exceeding 5 air changes SHALL BE INSTALLED IN THE BUILDING ENVELOPE. EXTERIOR THERMAL ENVELOPE �! --�•-
<br /> per hour. Testing shall be conducted with a blower door at a pressure of 0.2 inches w.g. (50 CONTAINS A CONTINUOUS AIR BARRIER. BREAKS OR JOINTS IN THE AIR BARRIER SHALL , ; �
<br /> Pascals and er the re uirements of section R402.4 of the Washin ton State Residential BE SEALED. AIR PERMEABLE INSULATION SHALL NOT BE USED AS AS A SEALING � � o
<br /> � P 4 9 MATERIAL. ' ¢ x�
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<br /> E�2f9Y COde. PROVIDE BUILDING AIR LEAKAGE TESTING WITH APPROVED BLOWER DOOR PER � ' �
<br /> INFORMATION BELOW. SUBMIT TESTING RESULTS TO JURISDICTION FOR APPROVAL. � ` �
<br /> Air barrier and thermal barrier -� � �
<br /> A continuous air barrier shall be installed in the building envelope. Exterior thermal '� � CEILING G.W.B.TAPED TO WALL '-�-' �
<br /> envelope contains a continuous air barrier. Breaks or joints in the air barrier shall be sealed. �� ! ��W�B� �� �
<br /> Air-permeable insulation shall not be used as a sealing materiaL � Z o
<br /> Cavity insulation installation �� : � ��
<br /> All cavities in the thermal envelo e shallpe filled with insulation. The densi Of t� �� SEALG.W.B.PERIMETER BLOWER DOOR TEST W Q
<br /> insulation shall be at the manufacturers' roduct recommendation and said densi shall be � \�� OF DOOR&WINDOW / � Q�
<br /> maintained for all volume of each cavi Batt t e insulation will show no voids or a s and i ��. OPENINGS / � `� - �w
<br /> tY• YP 9 P , �` � 'I \� 2015 Washington State Energy Code(WSEC)section R402.4.1.2 requires air leakage testing for �„�
<br /> maintain an even densit y for the entire cavit y. Batt insulation shall be installed in the � � i � all new houses and additions.The requirement is met if the structure has a leakage rate of 5 air �w
<br /> � S EA L G.W.B.T O T O P / S E A L G.W.B. P E R I M E T E R
<br /> recommended cavit de th.Where an obstruction in the cavi due to services, blockin , � � PLATE AT ALL EXTERIOR � I I � changes per hour when depressurized wlth a blower door to 50 Pascals or less(5ACH50).A g�
<br /> Y P tY 9 �/' � � OF DOOR 8 WINDOW Pascal is a measurement of ressure.249 Pascals are e ual to 1"of water column.The test must W
<br /> bracin or other obstruction exists, the batt roduct will be cut to fit the remainin de th of WALLS � �� I I i \ OPENINGS P q N m
<br /> 9 P 9 P / i be pertormed using a Blower poor device which consists of a large fan,a frame and panel. A
<br /> the cavity. Where the batt is cut around obstructions, loose fill insulation shall be placed to � , /% � � � � •• manometer(pressure gauge)is used to read house and fan pressures.
<br /> fill any surface or concealed voids, and at the manufacturers' specified density. Where � � G.W.B. CAULKED TO TOP PLATE i /�%�� �/� �� li �� � ,�, �
<br /> faced batt is used, the installation tabs must be stapled to the face of the stud. There shall � �� , � j '� � � � \ WSEC states that the test may be performed at any time after rough in.All penetrations in the
<br /> � I I � � �� � building envelope must be sealed including those for utilities, plumbing, electrical,ventilation and
<br /> be no compression to the batt at the edges of the cavity due to inset stapling installation �� � � I � I f I! � � �.` combustion appliances. The code also states that when required by the building official,the test -
<br /> tabs. Insulation that upon installation readily conforms to available space shall be installed SHADED � %�'�� ,� ' ' . shall be conducted by an approved third party.
<br /> , COMPONENTS , /� I I �, l\ -
<br /> filling the entire cavity and within the manufacturers density recommendation. iN�icATE E�EMENTs � '! � � I ( �I ; � \`� To conductthe test: - -
<br /> CelllllQ/BrtIC COMPRISING THE /.� / ' ' � ' I �II 1.Close all windows,doors and fireplace and stove doors.
<br /> The air barrier in any dropped ceiling/soffit shall be aligned with the insulation and any gaps CONTINUOUS AIR , �� �� I ' I I �I� ` 2. Close all dampers including exhaust, intake, make-up air,backdraft and
<br /> BARRIER ENCLOSURE —� � /j� ' � flue dampers.Since ou will be depressurizin the house, dampers in bath �
<br /> in the air barrier sealed. Access openings, drop down stair or knee wall doors to � , � �� I I � y 9 -
<br /> unconditioned attic spaces shall be sealed. Batt insulation installed in attic roof assemblies � ( I i �, � I �� fans,etc.will be sucked closed during the test and will therefore not _
<br /> G.W.B. CAULKED TO BOTTOM PLATE I I' � I I II ' / � negatively affect the results.
<br /> may be compressed at exterior wall lines to allow for required attic ventilation. � �' � �-� j '�',/ I � 3. Make sure plumbing traps are filled with water.
<br /> W811S j I �� �' � I� I�,.� � I 4. Leave doors between heated areas open.
<br /> � � � /�� � � �" ' ��� � 5. Open access hatches to conditioned attics and/or conditioned crawl
<br /> Corners and headers shall be insulated and the junction of the foundation and sill plate shall � �- BOTTOM PLATE CAULKED OR GASKETED ' �' �' , ( � ��«,s�r,�awe
<br /> � � I / ( ��; � I , � � spaces. Leave hatches closed if these are unconditioned areas.
<br /> be sealed. The unction of the to late and to of exterior walls shall be sealed. Exterior ,'� � TO SUBFLOOR/CONCRETE SLAB AT � i , j� % , �
<br /> � P P P SLAB ON GRADE CONDITIONS � � I I i � , � I � 6. Seal exterior openings for continuously operating ventilation systems and �, N Ar�
<br /> thermal envelope insulation for framed walls shall be installed in substantial contact and ; �" ; � ' � � ' ,�� � I � f � � heat recovery ventilators.
<br /> c o n t i n u o u s a l i g n m e n t w i t h t h e a i r b a r r i e r. K n e e w a l l s s h a l l b e s e a l e d. ,. ; � i -� � ; ' , �� ' � I 7. Tum off heatin g and coolin g s ystems but do not seal su p pl y or return
<br /> WIIIC�OWSt sk�[liqhts and doors � i RIM JOIST CAULKED, GLUED OR ' j � �� � / I registers.
<br /> ' � GASKETED TO SUBFLOOR � % � ( 8.Adjust all combustion appliances so that they do not tum on during the
<br /> The space between window/door jambs and framing and skylights and framing shall be � j I � j' � � , I � test.
<br /> S2al2d. i � � � •/� % � I ( 9. Install the blower door in an exterior door opening and connect hoses(rom
<br /> R I 1 1 1 I O I S t S �i j i ��� %�� .%" the manometer to the blower door fan and the exterior pressure tap. See
<br /> / I I manufacturer's instructions for correct set-up.
<br /> Rim joists shall be insulated and include the air barrier. �� , RIM JOIST CAULKED, GLUED OR � // �/ /// i 10. De pressurize the house to-50 Pascals.
<br /> — SEAL G.W.B. TO FIRST
<br /> Floors (includinQ above-caaraQe and cantilevered floors) _ - 'i� GASKETED TO TOP PLATE i � �I r ',��� , / � I 11. Record the flow rate(with simple manometers,the fan pressure(Pa)is
<br /> "� I � STUD AT INTERIOR
<br /> /� SEAL G.W.B.TO TOP converted to. CFMso usin a flow table. Man di ital manometers sold with
<br /> Insulation shall be installed to maintain ermanent contact with underside of subfloor �' � � i ' ( PARTIITIONS 9 y 9
<br /> P � ; � I I ��� � PLA7E WHEN ADJACENT � blower doors can automatically perform this conversion, and display
<br /> deckin g. The air barrier shall be installed at an y ex posed ed ge of insulation. �� � G.W.B. C A U L K E D T O T O P P L A T E � � .-/� TO UNCONDITIONED � ( CFMeodirectl y.)Consult your blower door and manometer manuals. �
<br /> Crawl saace walls � � ,� � ATTIC ' ' '
<br /> Where provided in lieu of floor insulation, insulation shall be permanently attached to the i� ; � � %�/ �� ( You now must convert the flow rate(CFM�o) to ACH�o. W
<br /> crawlspace walls. Exposed earth in unvented crawl spaces shall be covered with a Class I I� ,i ��/;�� \��� I Use the following formula: �
<br /> vapor retarder with overlapping joints taped. '� %' �
<br /> Shafts, penetrations I� �",��� � � ACHso=(CFMso X 60) /Volume
<br /> Duct shafts, utility penetrations, and flue shafts opening to exterior or unconditioned space �; �� �=���� ' � Where• m
<br /> Shall b2 S2al2d. � SEAL G.W.B.TO SILL ,,- �!' IV � � ACHso=Air Changes per Hour at-50 Pascals
<br /> Narrow cavities li PLATE AT ALL EXTERIOR �� ti CFM�o X 60=Converts Cubic Feet per Minute to Cubic Feet per
<br /> WALLS SEAL ALONG INSIDE OF � \?�\` Hour �
<br /> Batts in narrow cavities shall be cut to fit and installed to the correct density without any � - G.W.B. CAULKED TO BOTTOM PLATE BOTTOM OF FIRST STUD Volume=Conditioned floor area ofthe housing unit multiplied by �
<br /> voids or gaps or compression. Narrow cavities shall be filled by insulation that on ; ,' .=AT INTERIOR WALL OR I, the ceiling height
<br /> installation readil conforms to the available cavi s ace. , / ' HOLD BACK FIRST STUD �
<br /> Y tY P , � l��AND RUN G.W.B. 1 Example:A blower door test has be.en done on a 2,000 square foot house
<br /> G a r a q e s ep a r a t i o n , , �-- BOTTOM PLATE CAULKED OR GASKETED CONTINUOUS -- a h d t h e f a n fl o w(C F M 5 0) r a t e i s 1 1 0 0 C F M.
<br /> Air sealing shall be provided between the garage and conditioned spaces. ' � � TO SUBFLOOR/CONCRETE SLAB AT ACH�o=(CFM50 X 60)l Volume
<br /> SLAB ON GRADE CONDITIONS ACHso=(11 00 X 60)I(2000 X 8)
<br /> Recessed liqhtinq � /�-'�� ALL ELECTRICAL PENETRATIONS AT EXTERIOR
<br /> i WALLS TO USE AIR-SEALED BOXES.ALL WIRE ACHso=66,000/16,000
<br /> Recessed light fixtures installed in the building thermal envelope shall be air tight, IGrated, �-� SUBFLOOR CAULKED, GLUED OR / OPENINGS& PENETRATIONS SEALED WITH ACHso=4.1
<br /> and sealed to the drywalL � �"� GASKETED TO RIM JOIST j / CAULK,PUTTY OR INTEGRAL SEAL. Since the code requires the ACH�o to be less than 5,this house complies with an
<br /> PlumbinQ and wirinQ � " SEAL G.W.B.TO BOX FLANGE WITH ACHso of 4.1. Record the ACHso on the energy certificate on or near the electrical ��
<br /> Batt insulation shall be cut neatly to fit around wiring and plumbing in exterior walls. There � ,�- RIM JOIST CAULKED OR GASKETED CONTINUOUS BEAD OF CAULK OR ADHESIVE. panel. �
<br /> shall be no voids or gaps or compression where cut to fit. Insulation that on installation � To si��P�a,TE
<br /> readily conforms to available space shall extend behind piping and wiring. �'� v
<br /> Shower/tub on exterior wall �11�f-- P.T. SILL PLATE INSTALLED Q �
<br /> Exterior walls adjacent to showers and tubs shall be insulated and the air barrier installed �} OVER CONTINUOUS SILL GASKET J o
<br /> separating them from the showers and tubs. � �
<br /> Electrical/phone box on exterior walls � s w
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<br /> The air barrier shall be installed behind electrical or communication boxes or air sealed � � O
<br /> boxes shall be installed. � _
<br /> HVAC reQister boots � � �
<br /> HVAC register boots that penetrate building thermal envelope shall be sealed to the � p
<br /> subfloor or drywall. Q U �
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<br /> G.W.B AIR BARRIER - CONCEPTUAL G.W.B AIR BARRIER - CONCEPTUAL ISOMETRIC � � �
<br /> WSEC SECTION R403.7.1 EXTERIOR WALL SECTION - � �
<br /> All detached one- and two-family dwellings and multiple single-family dwellings Q �
<br /> (townhouses) up to three stories in height above grade plan using electric zonal heating as � v)
<br /> the primary heat source shall install an inverter-driven ductless mini-split heat pump in the
<br /> largest zone in the dwelling. Building permit drawings shall specify the heating equipment =
<br /> type and location of the heating system. �
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<br /> 1 CONCEPTUAL INTERIOR AIR BARRIER SYSTEM - GYPSUM WALL BOARD (G.W.B.) METHOD _ _
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<br /> � � \ G.W.B.ADHESIVE ON I SEALANT OR ADHESIVE —� ` �� CONTINUOUS BEAD OF � �
<br /> BOTH SIDES OF FIRST � � SUBFLOOR ADHESIVE �� Q
<br /> 3 / � INTERIOR STUD – � / /j�` �` �+
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<br /> a � �\\ \, I �` y JOB NO.: �
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<br /> c� _ �� I �.,, ; \�— SEALANT OR ADHESIVE �- PLOT DATE
<br /> -- G.W.B.ADHESIVE �� , I ; �; / 4/3/2017 4:17:54 PM
<br /> a AT BOTTOM AND / 2� �
<br /> � � TOP OF STUD —� , �
<br /> o CONTINUOUS SEALANT AT i
<br /> j � FIXTURE PERIMETER TO ��� j��� � `- SCALE: As od cated
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<br /> G.W.B. � � ` � �,
<br /> � � i :/ \\.� � DRAWN: Author
<br /> I.C. RATED RECESSED / � G.W.B.ADHESIVE � y
<br /> ;� LIGHT FIXTURE J � : �=" / -�\ ;; CHCKD: Checker
<br /> � �- AT BOTTOM AND �
<br /> . TOP OF PLATE
<br /> � / \� � �' BLDG. SHEET NO.:
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<br /> ° � A14
<br /> ° �� SEALING AT RECESSED FIXTURES ^ SEALING AT INTERSECTING WALLS � SEALING AT RIM JOIST :�
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<br /> i N.T.S. `F , N.T.S. N.T.S. �
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