THE VERMONT RESIDENTIAL ENERGY CODE 2015 WORKSHOP CONTENT T - PowerPoint PPT Presentation

THE VERMONT RESIDENTIAL ENERGY CODE 2015

WORKSHOP CONTENT • T he E ne rg y Co de • Ba c kg ro und / Ove rvie w • Whic h b uilding s, whe n? • Ob lig a tio ns o f the b uilde r • Wha t’ s Re q uire d? • Ba sic Re q uire me nts • Pe rfo rma nc e Re q uire me nts • F iling the Pa pe rwo rk 4/7/2015 2

TODAY’S PRESENTATION Spo nso re d b y L a Va lle y Building Supply De live re d b y E ffic ie nc y Ve rmo nt 4/7/2015 3

MAJOR CHANGES FOR 2015 • Co mplia nc e with Stre tc h c o de re q uire d fo r Ac t 250 pro je c ts • Ne w insula tio n re q uire me nts a nd pa c ka g e s • ASHRAE 62.2 o ptio n fo r ve ntila tio n • Ma ke up a ir re q uire me nts fo r e xha ust ho o ds • Air tig htne ss re duc e d fro m 5 to 3 ACH50 • 75% o f lig hts must b e hig h e ffic a c y 4/7/2015 4

THE LEGISLATION -- ACT 20 OF 1997 “RESIDENTIAL BUILDING ENERGY STANDARDS” • Ba se d o n I nte rna tio na l E ne rg y Co nse rva tio n Co de • Pe rfo rma nc e -b a se d sta nda rd • So me Ve rmo nt-spe c ific a dditio ns/ e xe mptio ns • Se lf-c e rtific a tio n b y b uilde r • T hre e -ye a r re visio n c yc le • Pub lic re vie w pro c e ss • 2015 c o de a pplie s to a ll pro je c ts tha t sta rt c o nstruc tio n o n o r a fte r Ma rc h 1, 2015 4/7/2015 5

WHICH BUILDINGS MUST COMPLY? • Ne w c o nstruc tio n, lo w-rise re side ntia l • One a nd two fa mily dwe lling s • Multifa mily ho using thre e sto rie s o r le ss • Do e s no t inc lude c o mme rc ia l b uilding s • But do e s inc lude re side ntia l pa rt o f mixe d-use • E xisting lo w-rise re side ntia l b uilding s • Additio ns • Only the a dditio n ne e ds to c o nfo rm • Re no va tio ns, windo w & e q uipme nt re pla c e me nt 4/7/2015 6

ALTERATIONS & RENOVATIONS • Applie s to a dditio ns, a lte ra tio ns, re no va tio ns o r re pa irs to a n e xisting b uilding , b uilding syste m o r po rtio n the re o f (una lte re d po rtio ns ne e d no t c o mply) • Applie s to c ha ng e o f unc o nditio ne d to c o nditio ne d spa c e • Applie s to insula tio n pro je c ts • Re pla c e me nt windo ws must c o mply • Sto rm windo ws a nd g la ss re pla c e me nt e xe mpt 4/7/2015 7

ALTERATIONS & RENOVATIONS • Wa lls e xe mpt if c a vitie s a re no t e xpo se d o r if the y a re a lre a dy full o f insula tio n • Re ro o fing e xe mpt unle ss she a thing o r insula tio n is e xpo se d a nd c a vity is e mpty • Re pla c e me nt o f le ss tha n 50% o f lig ht fixture s a nd re pla c e me nt o f b ulb & b a lla st in e xisting fixture s is e xe mpt 4/7/2015 8

LOG HOMES • Ve rmo nt c o de disting uishe s b e twe e n lo g ho me s a nd e ve rything e lse • I n g e ne ra l, lo g ho me s a re a llo we d to b e le ss e ffic ie nt • But the re a re mo re string e nt re q uire me nts fo r o the r pa rts o f the b uilding to pa rtia lly ma ke up fo r the diffe re nc e 4/7/2015 9

EXEMPTIONS • E xtre me lo w e ne rg y use • le ss tha n 1 wa tt pe r sq ua re fo o t pe a k lo a d • Mo b ile ho me s • T itle VI , Na tio na l Ma nufa c ture d Ho using Co nstruc tio n & Sa fe ty Sta nda rds Ac t o f 1974 • Site -c o nstruc te d c o mpo ne nts still must c o mply • Building s (o r a re a s) no t he a te d o r c o o le d • Hunting Ca mps • Histo ric b uilding s c a n a pply fo r e xe mptio n 4/7/2015 10

OWNER/BUILDER PROJECTS • Spe c ific a lly e xe mpte d fro m me e ting the te c hnic a l re q uire me nts o f the c o de • Owne r must dire c t the de ta ils o f c o nstruc tio n, inc luding e ne rg y ite ms, must live in the b uilding • Must do c a lc ula tio ns, c o mple te a nd file the Owne r/ Builde r Disc lo sure Sta te me nt • Must disc lo se in writing to po te ntia l b uye rs b e fo re purc ha se a nd sa le a g re e me nt 4/7/2015 11

LIABILITY • Ho me o wne r ma y ta ke c ivil a c tio n a g a inst pe rso n c e rtifying b uilding • Da ma g e s ma y inc lude inc re a se d e ne rg y c o sts a nd c o sts to b ring the b uilding into c o mplia nc e (a s we ll a s c o urt, a tto rne ys’ fe e s) • Cla ims must b e file d within six ye a rs 4/7/2015 12

THERMAL REQUIREMENTS • T he ne xt fe w slide s o utline the the rma l re q uire me nts o f the ne w c o de • F o r a ve ra g e ho use s, insta lling the se le ve ls will me e t the c o de • But the c o de re q uire s o ve ra ll pe rfo rma nc e , a nd the re a re ma ny wa ys to g e t the re • So yo u c a n insta ll a sse mb lie s le ss e ffic ie nt tha n this, b ut yo u ha ve to ma ke up fo r it so me whe re e lse in the b uilding , a nd yo u ha ve to use a me tho d tha t a c c o mmo da te s tha t tra de -o ff 4/7/2015 17

Thermal Requirements WINDOWS • F e ne stra tio n (e xc e pt skylig hts) • Ma ximum 0.32 U-va lue (0.30 fo r lo g ho me s) • Skylig hts • Ma ximum 0.55 U-va lue • Gla zing a re a • Ma ximum 20% • Up to 15 sq ft o f g la zing a nd o ne do o r is e xe mpt 4/7/2015 18

Thermal Requirements INSULATION • Ce iling s • Minimum R-49 • F o r fla t c e iling s, R-38 de e me d to me e t R-49 if full he ig ht unc o mpre sse d o ve r to p wa ll pla te • Slo pe d c e iling s OK @ R-30 if no t mo re tha n 500 sq ft o r 20% o f c e iling a re a , whic he ve r is le ss • I nsta lle r must c e rtify de ta ils, sig n, po st in c o nspic uo us lo c a tio n. De pth ma rke rs re q uire d fo r b lo wn a ttic s 4/7/2015 19

Thermal Requirements INSULATION • Wo o d fra me wa lls • Minimum R-25 • R-13 c a vity insula tio n plus R-10 insula te d she a thing de e me d to c o mply. • Ma ss wa lls • Minimum R-15 • R-20 re q uire d if mo re tha n ha lf o f the insula tio n is o n the inte rio r • (L o g ho me s e xe mpt fro m wa ll R-va lue re q uire me nt) 4/7/2015 20

Thermal Requirements INSULATION • F lo o rs • Minimum R-30 (R-38 fo r lo g ho me s) • Minimum R-20 OK if it fills the who le c a vity • Must ma inta in pe rma ne nt c o nta c t with unde rside o f sub flo o r 4/7/2015 21

Thermal Requirements INSULATION • Ba se me nt wa lls • Minimum R-15 c o ntinuo us o r R-20 c a vity • F ro m to p o f wa ll to 10 ft b e lo w g ra de o r to b a se me nt flo o r, whic he ve r is le ss • E xte rio r insula tio n must ha ve pro te c tive c o ve ring 4/7/2015 22

Thermal Requirements INSULATION • Unve nte d c ra wl spa c e : • Minimum R-15 c o ntinuo us o r R-20 inte rio r c a vity • Pe rma ne ntly fa ste ne d to wa ll do wn to flo o r a nd the n ve rtic a lly a nd/ o r ho rizo nta lly fo r a t le a st a n a dditio na l 24 inc he s • Must ha ve Cla ss I va po r b a rrie r o n flo o r, a tta c he d to wa ll, se a ms ta pe d • No ve nts to o utside • Ve nte d c ra wl spa c e • I nsula te flo o r a b o ve 4/7/2015 23

Thermal Requirements INSULATION • Sla b e dg e • Minimum R-15 pe rime te r • F o ur fe e t hig h o r hig h + wide to ta l • He a te d sla b • Minimum R-15 unde rne a th c o ntinuo us • E xpo se d e xte rio r insula tio n must ha ve a pro te c tive c o ve ring 4/7/2015 24

WHAT’S REQUIRED? • Ba sic Re q uire me nts • Pe rfo rma nc e Re q uire me nts -- T hre e Me tho ds  “F a st T ra c k” me tho d  RE S c he c k So ftwa re  Ho me E ne rg y Ra ting • Ce rtific a tio n 4/7/2015 27

WHEN TO DO THE ANALYSIS • No t re q uire d until a fte r, b ut... • Sho uld de te rmine whe re yo u sta nd b e fo re c o mmitting to a de sig n • Or e spe c ia lly, b e fo re fra ming & b a c kfilling 4/7/2015 28

BASIC REQUIREMENTS • Air T ig htne ss • Va po r Re ta rde r • Duc ts • T he rmo sta ts • So lid F ue l Applia nc e s • Ve ntila tio n & Co mb ustio n Air • Windo w U-va lue • Pipe I nsula tio n • L ig hting • E q uipme nt Sizing 4/7/2015 29

Basic Requirements AIR LEAKAGE • Air le a ka g e lo c a tio ns must b e se a le d • Applie s to le a ka g e po ints b e twe e n: • Co nditio ne d spa c e a nd o utside • Co nditio ne d a nd unc o nditio ne d spa c e s • T e sting o ptio n • L e ss tha n 3 ACH @ 50 Pa • E ve rything o pe n e xc e pt c himne y da mpe rs, c o ntinuo usly o pe ra ting ve nt syste m, a djusta b le pa ssive ve nts • Visua l inspe c tio n o ptio n 4/7/2015 31

Basic Requirements VISUAL AIR BARRIER INSPECTION • Co ntinuo us, dura b le a ir b a rrie r • Bre a ks o r jo ints in the a ir b a rrie r se a le d • Spa c e b e twe e n fe ne stra tio n ja mb s a nd fra ming se a le d with minimum e xpa nding fo a m • All plumb ing a nd wiring pe ne tra tio ns sha ll b e se a le d to the a ir b a rrie r 4/7/2015 32

Basic Requirements VISUAL AIR BARRIER INSPECTION • Junc tio ns o f the fo unda tio n a nd sill pla te , sill pla te a nd rim-b a nd, a nd rim b a nd a nd sub flo o r, a nd to ps o f wa lls se a le d • Whe n a ir pe rme a b le insula tio n is insta lle d a t the rim jo ist, a dura b le , rig id inte rio r a ir b a rrie r sha ll b e insta lle d • Air b a rrie r sha ll b e insta lle d a t a ny e xpo se d e dg e o f flo o r insula tio n. 4/7/2015 33