AnatomyofaBuilding_Fachada_Infiltracao

8/12/2019 AnatomyofaBuilding_Fachada_Infiltracao

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CAI 2011

EDUCATION PROGRAM


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Building Anatomy = structure=individual components

Missing components, poor workmanship and

inadequate materials cause the failure of the structure

Structure provides shelter. The quality of the shelter is mostdependent on the buildingenvelope

The quality of the buildingenvelope is dependent oncomponents and workmanship


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Design to keep water out Control condensation or water vapor

Flashing

Flashing Flashing

Sealants


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Window +door heads

Window +door sills

BalconyDeck

Foundation

Chimneycap

Kick-out

Roof-wall

Chimneyroof


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Chimney caps should be made of aluminum or stainless- not

galvanized steel


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The best materials +poor workmanship=failure


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Missing sillflashing


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Below windows


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WindowConditions


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Lookslikethis


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BUILDING WRAPS OR

SECONDARYMOISTURE BARRIERS

INCLUDES:TAR PAPERTYVEKWET APPLIED MEMBRANES

LAST DEFENSE AGAINST LEAKSIN THE CLADDING


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Missingordamagedbuildingwrap

OSB


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TYPICAL RIGHT REAR

ELEVATION

MISSING BUILDINGWRAP

MISSINGBUILDING

WRAP

DAMAGED

FRAMING/WOOD

DAMAGED

FRAMING/WOOD


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WE DONT DO KICK-OUT FLASHING

maybe we should have..shhhhh.


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Roof Wall Intersection


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Done correctly


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Its even better than duct tape!


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FlexibilityModulus and movement capability

AdhesionPrimer?

DurabilityLife expectancy


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Acrylic LatexPolyurethane

Single component

Multi component

Silicone


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Water based emulsion Generally not used on building exteriors

+/- 10% movement at best

Paintable Low cost/readily available- Lowes, Home

Depot

Limited life expectancy 1 2 yr.


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Broadly used waterproofing sealant Up to +100/-50% movement - when new and

dramatically decreases with age

Some Require mixing 2 component

Generally paintable

Low cost

Limited life expectancy - 5 to 10 years


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Twocomponentsealantimproperly

mixed


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Improperlytooledsealantcausesbond

failure


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Single component - moisture cure Becoming preferred sealant

Up to +100/-50% movement - for life ofsealant

less paintable

Somewhat Higher initial product cost

Long life expectance - 20+ Years


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1/2 to 3/4 min.width or 4 times

joint movement

2 to 1 width todepth ratio

Avoid 3 sidedadhesion


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At perpendicularsurfaces

1/4 minimum

contact Use bond breaker

tape or backer ifdifferent materials


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Lets install some caulking


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Use closed cell ornon-gassing B.R.

No open cell

polyurethane B.R. 25% compression

Proper depth

Bondbreaker tape


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Mix sealant ifrequired

Push dontpull sealantbead

Completely filljoint

Maskingtape


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Immediately aftersealant installation

Ensures proper joint

shape No tooling aids

(soap)

Remove masking

Masking tape


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Nice nice!


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Bridges existingsealant joint

1/4 to 3/8 min.

contact Use wet sealant or

preformed sealant


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P.S. It doesnt always come from the outside

To keep it out you need to


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SolidLiquid

Gas

Condensate


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Walls have tobreathe...Trapped moisture causes lots of$$$$$$$$$ damage..

..SO..

.HOW CAN A WALL BREATHEAND NOT LEAK?

IT,S MAGIC


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Water molecule:

3 X 103 m

Vapor:

5 X 107 m

Mt. Everest:

30,000 ft

5 story: 50 ft.


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Cooking (no venting) gal/hr Cooking, gas

Clothes washing (nv)

Clothes drying (nv) 3 Shower 1/8 Breathing, per person 1/16 Breathing, family of 4 6 gal/day

Th W d R C h


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Three slimy accomplices wormed their way into the exhibit hall under

the guise of helping the Professor with his books

The Professor, now in his multi-storied exhibit booth, isin reality an Imposter. Meanwhile, the real Professor, frozen in

place by a Wizard induced spell, remains in deep thought,

contemplating why he is the victim of lecherous glares emanating

from a multitude of passers-by.

The Imposter, who is none other than an Evil Wizard

Sculptor, has stolen all of the secret Passwords and plans to

destroy them along with the last remaining Books of BuildingKnowledge.

You must find the Impostor Professor and induce him

to hand over one of the passwords. Should you fail, the real

Professor, the Books and all Buildings are doomed to eternal wood

rot.

Exploit the Evil Wizards weaknesses:1. Tootsie Roll Lollypops

2. A legally dangerous letter opener,

3. A sweet kiss from Harry Potter,

Then confront The Imposter Professor/ Wizard with all of these

items, to save the day and get your secret password.

Good luck, and watch out for spies!

The Wood Rot Cometh.


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FREEDOWNLOAD OF THIS

POWERPOINT TO ASSIST your

CLIENTS AND Board membersunderstand critical

aspects of

Anatomy of a building LEAK

AnatomyofaBuilding_Fachada_Infiltracao

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