Water control Vapor control and drying Room for growth

Size: px

Start display at page:

Download "Water control Vapor control and drying Room for growth"

Norman French
5 years ago
Views:

How do we decide whether to insulate to inside or the outside? How to install windows in a DER wall (let me count the ways ) What s the best approach for historic buildings?

1 How do we decide whether to insulate to inside or the outside? How to install windows in a DER wall (let me count the ways ) What s the best approach for historic buildings? How to deal with basement walls Where should the thermal enclosure be with respect to the basement? Where the wood meets the stone: when are we worried about the sill rotting in DER? Location of water control with exterior insulation Top-side basement slab retrofit options Can t we just? Strategies to get airflow control in retrofit Continuity of control at porch, deck, roof, structure Exterior insulation strategies for masonry walls Chainsaw roof: why, why not, how? How to attach a roof overhang over continuous insulation 1 2 Where to add insulation, inside or outside? Where to add insulation, inside or outside? Water control Vapor control and drying Room for growth Existing replacement windows installed without flashing 3 4 Neuhauser buildingscience.com 1 of 42

Where to add insulation, inside or outside?

Siding removed to remediate flashing Drainage plane

2 Where to add insulation, inside or outside? Where to add insulation, inside or outside? 5 6 Where to add insulation, inside or outside? Where to add insulation, inside or outside? Drainage remediation Head flashing at new window Siding removed to remediate flashing Drainage plane remediation at base of wall 7 8 Neuhauser buildingscience.com 2 of 42

3 Where to add insulation, inside or outside? Where to add insulation, inside or outside? 9 10 Where to add insulation, inside or outside? Where to add insulation, inside or outside? Neuhauser buildingscience.com 3 of 42

What if we take air from outside and warm it up?

4 Deep Energy Retrofit Where to put the insulation? Inside it s 68F, 40% RH What happens when that air is cooled? What if we take air from outside and warm it up? Generally, as stuff gets colder, it gets wetter Where to add insulation, inside or outside? Where to add insulation, inside or outside? Roof overhang and roof insulation Roof overhang and roof insulation Neuhauser buildingscience.com 4 of 42

5 Where to add insulation, inside or outside? Where to add insulation, inside or outside? Roof overhang and roof insulation Water control Vapor control and drying Room for growth Interior space Disruption to occupants What s the best approach for historic buildings? What s the best approach for historic buildings? Durability Water control Drying potential Sacrificial cladding What will make the building viable? Comfort Maintenance costs Operating costs Short term capital Neuhauser buildingscience.com 5 of 42

6 What s the best approach for historic buildings? What s the best approach for historic buildings? What s the best approach for historic buildings? What s the best approach for historic buildings? Neuhauser buildingscience.com 6 of 42

What s the best approach for historic buildings? What s the best approach for historic buildings? Durability Water control Drying potential Sacrificial cladding What will make the building viable?

7 What s the best approach for historic buildings? What s the best approach for historic buildings? Durability Water control Drying potential Sacrificial cladding What will make the building viable? Comfort Maintenance costs Operating costs Short term capital Should the basement be in or out? Should the basement be in or out? What is a basement? Damp Stinky Cold Funky Wet Made of rocks Potential amenity Space for mechanical systems Made of rocks Do we have a choice? What is in the basement? Expensive to build Useful space Neuhauser buildingscience.com 7 of 42

Basement Separation: Bold Approach 4.6 ACH50; 2129 CFM 50 total; 1100 CFM 50 through floor over basement 7.

separation: ~400 cfm50 across basement ceiling (of ~1,900 total) More than leakage between apartments (~200 cfm50

lower apartment ~15% of total enclosure leakage for upper apartment Should the basement be in or out?

8 Basement Separation: Bold Approach 4.6 ACH50; 2129 CFM 50 total; 1100 CFM 50 through floor over basement 7.3 ACH50; 3590 CFM 50 total; 1740 CFM 50 through floor over basement Extraordinary approach to basement separation: ~400 cfm50 across basement ceiling (of ~1,900 total) More than leakage between apartments (~200 cfm50 inter-unit leakage) ~20% of total enclosure leakage area for combined living area ~30% of total enclosure leakage for lower apartment ~15% of total enclosure leakage for upper apartment Should the basement be in or out? The basement is connected to the living space. Important things may be in the basement (psst! It s not about the energy!) Neuhauser buildingscience.com 8 of 42

9 Location of water control with exterior insulation Location of water control with exterior insulation Where is the water control? Major impact on sequence Location of water control with exterior insulation Drainage plane is not where it used to be Location of water control with exterior insulation Exterior insulation drainage planes sequencing: Neuhauser buildingscience.com 9 of 42

Location of water control with exterior insulation Roof-Wall flashing sequence Location of water control with exterior insulation As always, avoid concentrating

37 38 Location of water control with exterior insulation Can be in front of or behind the insulation All flashing details must respect location of water control

10 Location of water control with exterior insulation Roof-Wall flashing sequence Location of water control with exterior insulation As always, avoid concentrating water on the building Location of water control with exterior insulation Can be in front of or behind the insulation All flashing details must respect location of water control layer Sequence matters Can t we just Short cuts to a world of hurt If it can t be done right, should it be done? Does it pose a risk to health and safety? Does it pose a risk to the building? Is it easily reversible if/when resources are available to go further? Neuhauser buildingscience.com 10 of 42

Can t we just Short cuts to a world of hurt Are you

41 42 Can t we just Short cuts to a world of hurt

43 44 Neuhauser buildingscience.com 11 of 42

11 Can t we just Short cuts to a world of hurt Are you sure you want to do that? Can t we just Short cuts to a world of hurt Are you sure you want to do that? Can t we just Short cuts to a world of hurt Can t we just Short cuts to a world of hurt Are you sure you want to do that? Neuhauser buildingscience.com 11 of 42

Can t we just Short cuts to a world of hurt Can t we just Short cuts to a world of hurt If it can t be done right, should it be done? Does it pose a risk to health and safety?

12 Can t we just Short cuts to a world of hurt Can t we just Short cuts to a world of hurt If it can t be done right, should it be done? Does it pose a risk to health and safety? Does it pose a risk to the building? Is it easily reversible if/when resources are available? Continuity of control at porch roof and deck Continuity of control at porch roof and deck Does the gravity load need to be transferred to the house? Where is the water control layer? Neuhauser buildingscience.com 12 of 42

13 Continuity of control at porch roof and deck Continuity of control at porch roof and deck Continuity of control at porch roof and deck Deep Energy Retrofit Measures Verification Neuhauser buildingscience.com 13 of 42

14 Continuity of control at porch roof and deck Continuity of control at porch roof and deck Continuity of control at porch roof and deck Continuity of control at porch roof and deck Neuhauser buildingscience.com 14 of 42

15 Continuity of control at porch roof and deck Continuity of control at porch roof and deck Continuity of control at porch roof and deck Continuity of control at porch roof and deck Built up siding detail over foam Neuhauser buildingscience.com 15 of 42

16 Continuity of control at porch roof and deck Continuity of control at porch roof and deck Continuity of control at porch roof and deck Continuity of control at porch roof and deck Neuhauser buildingscience.com 16 of 42

Where is the water control layer? Chainsaw roof: why, why not, how?

17 Continuity of control at porch roof and deck Continuity appears to matter for air tightness Does the gravity load need to be transferred to the house? Where is the water control layer? Chainsaw roof: why, why not, how? Continuity of air and thermal control Sometimes not accommodated by structure Neuhauser buildingscience.com 17 of 42

18 69 70 Window/door flashing Neuhauser buildingscience.com 18 of 42

19 Window flashing Flashing challenges Window flashing challenges Window flashing challenges Neuhauser buildingscience.com 19 of 42

20 Flashing challenges Flashing challenges Mock-up makes perfect Window flashing mock up Mock-up makes perfect Window flashing mock up Neuhauser buildingscience.com 20 of 42

21 Window aligned with drainage plane Window installed with minimal disruption to interior Window flashing saved Neuhauser buildingscience.com 21 of 42

Window/door flashing Foundation Walls Gravity wins Water + Gravity wins Provide drainage Flat or bumpy? Finished or unfinished? 85 86 When are we worried about rotting the sill?

22 Window/door flashing Foundation Walls Gravity wins Water + Gravity wins Provide drainage Flat or bumpy? Finished or unfinished? When are we worried about rotting the sill? When are we worried about rotting the sill? Risk factors: Foundation constructed of capillary (wicking) materials Liquid water in contact with foundation wall Water vapor condensing in or on the foundation wall Limited drying of the foundation wall Neuhauser buildingscience.com 22 of 42

23 When are we worried about rotting the sill? When are we worried about rotting the sill? When are we worried about rotting the sill? Neuhauser buildingscience.com 23 of 42

Top-side basement slab retrofit Top-side

24 Top-side basement slab retrofit Top-side basement slab retrofit What s the water load/risk? What s in the basement? What s the head height? Top-side basement slab retrofit Top-side basement slab retrofit Neuhauser buildingscience.com 24 of 42

25 Exterior insulation of masonry Exterior insulation and over-clad of masonry Insulated Metal Panel Exterior insulation and over-clad of masonry Exterior insulation and over-clad of masonry Neuhauser buildingscience.com 25 of 42

Photo credit: Elton + Hampton Architects 103 104

26 Exterior insulation and over-clad of masonry Exterior insulation and over-clad of masonry Exterior insulation and over-clad of masonry Exterior insulation and over-clad of masonry Weatherization program implementation Photo credit: Elton + Hampton Architects Neuhauser buildingscience.com 26 of 42

27 Exterior insulation and over-clad of masonry Exterior insulation and over-clad of masonry % Exterior insulation and over-clad of masonry Exterior insulation and over-clad of masonry Neuhauser buildingscience.com 27 of 42

28 Exterior insulation and over-clad of masonry Exterior insulation and over-clad of masonry Exterior insulation and over-clad of masonry Exterior insulation and over-clad of masonry Neuhauser buildingscience.com 28 of 42

DER Project Plans Staged DER Staged DER = Long range planning We do what we

29 Exterior insulation and over-clad of masonry Exterior insulation and over-clad of masonry What if we can only do part of it now? DER Project Plans Staged DER Staged DER = Long range planning We do what we can now Anticipate where we want to go in the future Neuhauser buildingscience.com 29 of 42

Staged DER DER Project Plans Staged DER Staged DER = Long range planning Ø High performance retrofit measures Ø Ø Connect to existing components Transfer control functions to existing components

30 Staged DER DER Project Plans Staged DER Staged DER = Long range planning Ø High performance retrofit measures Ø Ø Connect to existing components Transfer control functions to existing components Anticipate connection to future components Transfer control functions to new components Ø Make the next guys job easier Staged DER Roof First Staged DER Roof First Neuhauser buildingscience.com 30 of 42

31 Staged DER Roof First Staged DER Roof First Staged DER Roof First Staged DER Roof First Neuhauser buildingscience.com 31 of 42

32 Staged DER Roof First Staged DER Roof First Staged DER Roof First Staged DER Roof First Neuhauser buildingscience.com 32 of 42

33 Staged DER Roof First Staged DER Roof First Staged DER Staged DER Neuhauser buildingscience.com 33 of 42

34 Staged DER Staged DER Staged DER Staged DER Window Retrofit Neuhauser buildingscience.com 34 of 42

Staged DER Staged DER Window Retrofit 137 138 What if we can only do part of it now?

35 Staged DER Staged DER Window Retrofit What if we can only do part of it now? Communicating intent to get performance built Neuhauser buildingscience.com 35 of 42

36 NESEA BuildingEnergy 13 Deep Energy Retrofits - Details, Questions, Issues DER Measures Specification Be Specific! March 5, 2013 DER Measures Specification Control Functions Guide Specification Enclosure: Ø Mechanical: Ø Water Ø Space Ø Air control flow control Ø Vapor Control Ø Thermal Control Ø Space March 5th, 2013 heating cooling Ø Ventilation Ø Air mixing Ø Water heating March 5th, DER Measures Specification DER Measures Specification March 5th, 2013 March 5th, 2013 Neuhauser 143 buildingscience.com of 42

37 C 2011 Coldham & Hartman Architects REVISIONS Date: Project No. Scale: Drawn: Checked: 4 Nov /4" = 1'-0" arw TRCH 2 1 TRANSLATES FROM FIRST LAYER OF FOAM TO BAND JOIST TO EXTERIOR FACE OF OC SPF AT INTERIOR, BACK TO INTERIOR FACE OF EXTERIOR FOAM - COMPLEX ON PAPER... NESEA BuildingEnergy 13 Deep Energy Retrofits - Details, Questions, Issues March 5, 2013 DER Measures Specification Being Specific Communicate the functional intent Ø Very difficult to anticipate every condition Ø Empowers person in the field: Water control è down and out Air flow control è make connections air tight Thermal control è avoid putting bridges through it Vapor control è where is moisture sensitive material? which direction is the vapor drive? do we need to allow diffusion or control it? DER Measures Specification C 2011 Coldham & Hartman Architects Von Goeler - Slough 24 Hampden Street Northampton, MA AIR SEALING SCHEMATICS NOTE: AIR BARRIER AT EXISTING BUILDING TO BE FIRST LAYER OF FOIL-FACED FOAM, TAPED AT ALL SEAMS AND TRANSITIONS ON FOUNDATION WALL, THIS TRANSITIONS TO THE EXTERIOR SPRAYED FOAM INSULATION BLOWER DOOR PRESSURE TEST TO BE CONDUCTED AT COMPLETION OF AIR BARRIER, BEFORE INSTALLATION OF INTERIOR WALL FINISHES. DIAGNOSTIC FOG TESTING WILL BE CONDUCTED TO FIND FLAWS IN AIR BARRIER SYSTEMS PRESSURE TESTING TARGET: 0.1CFM50 / SQUARE FOOT OF SHELL TARGET CFM50 OF FINAL BLOWER DOOR: 580CFM50 NOTE: AIR BARRIER AT ADDITION TO BE TAPED SHEATHING AND EXTERIOR FOAM INSULATION AT FOUNDATION WALL For Construction REVISIONS Date: 4 Nov Project No. Scale: 3/4" = 1'-0" Drawn: Checked: arw TRCH A5.3 1 EXISTING 2 ADDITION DER Measures Specification DER Measures Specification NOTE: AIR BARRIER AT ADDITION TO BE TAPED SHEATHING AND EXTERIOR FOAM INSULATION AT FOUNDATION WALL BLOWER DOOR PRESSURE TEST TO BE CONDUCTED AT COMPLETION OF AIR BARRIER, BEFORE INSTALLATION OF INTERIOR WALL FINISHES. DIAGNOSTIC FOG TESTING WILL BE CONDUCTED TO FIND FLAWS IN AIR BARRIER SYSTEMS PRESSURE TESTING TARGET: 0.1CFM50 / SQUARE FOOT OF SHELL TARGET CFM50 OF FINAL BLOWER DOOR: 580CFM50 ADDITION NOTE: AIR BARRIER AT ADDITION TO BE TAPED SHEATHING AND EXTERIOR FOAM INSULATION AT FOUNDATION WALL NOTE: AIR BARRIER AT EXISTING BUILDING TO BE FIRST LAYER OF FOIL-FACED FOAM, TAPED AT ALL SEAMS AND TRANSITIONS ON FOUNDATION WALL, THIS TRANSITIONS TO THE EXTERIOR SPRAYED FOAM INSULATION TRANSLATES FROM FIRST LAYER OF FOAM TO BAND JOIST TO EXTERIOR FACE OF OC SPF AT INTERIOR, BACK TO INTERIOR FACE OF EXTERIOR FOAM - COMPLEX ON PAPER... EXISTING Von Goeler - Slough 24 Hampden Street Northampton, MA AIR SEALING SCHEMATICS For Construction A Neuhauser buildingscience.comblower DOOR PRESSURE TEST TO BE CONDUCTED AT COMPLETION OF AIR BARRIER, BEFORE 37 INSTALLATION of 42 OF INTERIOR WALL FIN DIAGNOSTIC FOG TESTING WILL BE CONDUCTED TO FIND FLAWS IN AIR BARRIER SYSTEMS PRESSURE TESTING TARGET: 0.1CFM50 / SQUARE FOOT OF SHELL

- Enclosure 149 150 Deep Energy Retrofit Measures Verification Deep Energy

38 DER Project Plans It s important to have a plan! (It s important to plan) Deep Energy Retrofit Measures Verification Plan Review - Enclosure Deep Energy Retrofit Measures Verification Deep Energy Retrofit Measures Verification bedroom bath bedroom kitchen bedroom Neuhauser buildingscience.com 38 of 42

Significant components not on plans Deep

components not on plans 155 156 Neuhauser

39 Communicating intent to get performance built It s the whole (hole) enclosure Deep Energy Retrofit Measures Verification You ve got to see it to Significant components not on plans Deep Energy Retrofit Measures Verification You ve got to see it to Significant components not on plans Neuhauser buildingscience.com 39 of 42

40 It s the whole (hole) enclosure Helpful and nifty stuff Slab insulation sequencing Slab insulation sequencing Neuhauser buildingscience.com 40 of 42

Window installation 2x bucks let in to exterior foam allow for

Through It Condition of basement very important Pre-retrofit,

surround Existing interior trim retained 161 162 Design Challenge:

(flowing) water in basement Ø Bulk water Ø Capillary transfer Ø

Trenches, drain pipe to daylight, gravel 6 mil poly More gravel

in contact with concrete 12 high XPS at slab perimeter 163 164

41 Window installation 2x bucks let in to exterior foam allow for standard practice installation Design Challenge A River Runs Through It Condition of basement very important Pre-retrofit, standing (flowing) water in basement Flanges attached to 2X frame surround Existing interior trim retained Design Challenge: A River Runs Through It Design Challenge A River Runs Through It Condition of basement very important Pre-retrofit, standing (flowing) water in basement Ø Bulk water Ø Capillary transfer Ø Condensation Ø Convective transfer Ø Difusion Retrofit Plan: Trenches, drain pipe to daylight, gravel 6 mil poly More gravel SPF on walls DER project guidance: Insulation Concrete slab Poly in contact with concrete 12 high XPS at slab perimeter Neuhauser buildingscience.com 41 of 42

Enclosure Roof/Attic Water Management New asphalt shingle

and connected to wall housewrap Vapor Control 1

blown in cellulose over 1 closed-cell spray foam Critical

plate 165 166 Cladding attachment over semi-rigid mineral

42 Enclosure Roof/Attic Water Management New asphalt shingle roof Air Control Continuous 1 spray foam at attic floor and connected to wall housewrap Vapor Control 1 closed-cell spray foam and vented roof Thermal Control 18 blown in cellulose over 1 closed-cell spray foam Critical air seal at attic floor House wrap sealed to wall top plate Cladding attachment over semi-rigid mineral wool Insulation It Works! 167 Neuhauser buildingscience.com 42 of 42 42

Deep Energy Retrofit is a path to ZNE How does all of this support zero netenergy

Deep Energy Retrofit is a path to ZNE How does all of this support zero netenergy What is Deep Energy Retrofit? Lessons from a Cold-Climate DER Pilot Program Retrofit to high performance Ø Durability Ø Comfort Ø Indoor air quality Ø Aesthe7cs Ø Amenity Ø Energy Existing building è Zero