Stucco manufacturers association guide specificationiton. Joseph lstiburek drainage planes also referred to as water resistive barrier or wrb are water repellent materials building paper, house wrap, sheet or trowel applied membranes, foam insulation, coated structural sheathing, etc that are located behind the cladding and. A kickout diverter shall be installed at the lower roof edge. The performance of weatherresistant barriers in stucco. For one, stucco s topnotch quality makes it last for a long time. Apr 09, 20 animation of an installation of dupont stuccowrap behind cementitious stucco black paper layer placed prior to brown and scratch coats of traditional hard coat stucco. Application permabarrier primer plus and permabarrier wb primer are waterbased primers which impart an aggressive, high tack finish on the treated substrate. Weather resistive barriers prime source produces and distributes three types of durable high density woven weather resistive barriers. They also allow the free passage of water vapor to the outside of the building so the framing and wall cavity can dry, reducing the threat of mold and rot. This article explains the need for water resistant barriers on building exterior walls and explains the concept of a rain screen. Complies with icces acceptance criteria for water resistive coatings ac212. A revolutionary structural roof and wall system that streamlines weatherization with an integrated air and waterresistive barrier. You can ask an expert to perform a moisture test or leak detection test to determine where the water is coming from. The product is also called synthetic stucco, and it refers to a multilayered exterior finish thats been used in european construction since shortly after world war ii.
Animation of an installation of dupont stuccowrap behind cementitious stucco black paper layer placed prior to brown and scratch coats of traditional hard coat stucco. Fluid applied air barriers selfadhered air barriers flashings adhesives and primers sealants. Feb 09, 2016 aquaflash is a water resistant flashing system consisting of a liquid adhesive and a polyester tape for use at wall openings, while backtop nt smooth and texture is a high performance, water. Aquaflash is a waterresistant flashing system consisting of a liquid adhesive and a polyester tape for use at wall openings, while backtop nt smooth and texture is. Permabarrier wall membrane us version resource gcp. Stop beadcasing bead must be installed at the rooflines. Threecoat stucco application information sheet community development building and inspection 1800 w. The sheathing underneath the water resistive barrier is osb common in houses built after 1980 there is plastic sheeting underneath your houses interior drywall and you use air conditioning common in houses built after 1970 in canada and the northern part of the usa the more of those that are true, the more risky stucco is on your house. Eifs is an acronym for exterior insulation and finish systems. A basic stucco assembly over concrete or cmu, applied directly over approved water resistive barrier and metal lath with a dryvit finish. Apart from that, stucco resists moisture and is water resistant. Stucco requires weather barrier behind the lath to control the penetration of water. It incorporates a finestop ra, rs or vb air waterresistive barrier to provide a premium level of protection to the sheathing and cavity against moisture and. Ideal for wood frame construction, henry blueskin vp100 is a fully adhered, peelnstick system that eliminates air leakage while functioning as a waterresistant barrier and rain barrier.
Water resistant barriers on building exterior walls. If the drainage system abuts a barrier system, the weather resistive barrier must not let water migrate past it at the point where it ends. New international building code allows weatherresistive. Dryvits aquaflash and backstop nt application youtube. In drainage wall designs, the wrb and flashing are relied upon to collect water that penetrates the wall cladding and drains it back to the exterior. The stucco expert will then be able to filter out the root cause before performing a treatment. Here is an example of a properly installed weep screed on a concrete walkway where there is a gap between the bottom edge of the stucco and the concrete.
Assume that 3coat stucco leaks, and detail the building envelope with careful flashing and a doublelayer waterresistive barrier. Water will likely seep into the stucco here and can potentially cause damage later on. Permabarrier wall membrane and permabarrier high temperature wall membrane may be applied only in dry weather when air and surface temperatures are above 40f 5c. Proper installation of water resistive barrier materials, robust and properly installed flashing, and sufficient and properly installed. The sheathing paper must integrate properly with window and door flashings, a common source of water intrusion. The irony is rich and deep here since eifs, the facesealed kind, was fingered by many as the cause of major stucco failures in the early 1990s and hardcoat stucco was held up at the time to be the cladding of choice, whereas today water managed eifs is the obvious answer to the current rash of hardcoat stucco failures. The detail below shows thin brick but the idea is the same with 3 coat stucco. Akroguard is designed for use as a water resistive barrier and air barrier over approved substrates and with the akroflex eif systems. Attaching a deck ledger to a stucco wall greenbuildingadvisor.
Akroguard is designed for use as a waterresistive barrier and air barrier over approved substrates and with the akroflex eif systems. This patch is designed to repair the thin layer max 316 of. Keeping water out of stucco walls builder magazine. The 2012 international building code ibc, section 1403. A water barrier and drainage plane directs water that leaks through the part of a wall exposed to the weather, to safely drain down and away from the wall. Proper installation of a housewrapalso known as a waterresistive barrier wrbpreferably with a rainscreen behind the wall cladding, enables us to build resilient homes that will last for generations. Water repellant admix for stucco and mortar aquashield is a powdered admixture designed to increase the water resistance of colortek stucco, mortar, or other approved cementitious products. Complies with icces acceptance criteria for waterresistive coatings ac212.
Lahabra exterior color coat patch is a precolored stucco finish that is ideal for refinishing around newly installed windows, repair chipped corners and small damaged areas on standard 1620 stucco finishes. If the drainage system abuts a barrier system, the weatherresistive barrier must not let water migrate past it at the point where it ends. Designed for use as water resistive barrier behind lahabra eifs or stucco. A basic stucco assembly over concrete or cmu, applied directly over approved waterresistive barrier and metal lath with a dryvit finish. Stucco water damage causes improper stucco composition. All new homes must have a waterresistive barrier, on the exterior, typically sheathing wrap or felt paper. It incorporates a finestop ra, rs or vb air water resistive barrier to provide a premium level of protection to the sheathing and cavity against moisture and air intrusion. In 1968, the code uub790a start ed requiring graded type paper as a. Water resistive barriers wrbs, used as part of an exterior wall system, are designed to prevent air and water from entering the stud wall cavity from the outside. Why stucco leaks and how to prevent your stucco from. As such, they are designed as drainage plane walls with metal lath over a water. Building science has shown us what to do with water that leaks behind wall claddings. Water repellant admix for stucco and mortar aquashield is a powdered admixture designed to increase the waterresistance of colortek stucco, mortar, or other approved cementitious products. Apply waterresistive barrier complying with section 1404.
Exterior color coat patch is ready to use with only the addition of water. What vertical strapping do you suggest behind both the brick old clinker bricks and 3part stucco. Local building codes may require two layers of wrb waterresistive barrier behind absorptive claddings such as plaster or manufactured stone veneer applied over woodbased sheathing. When combined with grip rite selfadhered flashings, highly weather resistant barriers are created which are proven to resist air and water leakage. Housewrap, or water resistive barrier, acts as a drainage plane, and as the stucco dries, water flows down the building paper and weeps out the bottom of the stucco. Hydrotex waterresistant barrier features advanced, 2ply construction. A 100% acrylic elastomeric waterproof membrane and air barrier which can be either rolled, brushed, or spray applied. Dont take chances with your building protect it with fastflash, liquid flashing membrane. If two adjoining systems both employ drainage concepts, the weatherresistive barrier of both can tie together. The first step in determining what kind of water damage youre working with.
May be applied by roller, brush or suitable spray equipment. Aquashield is added during mixing and offers the benefits of longlasting waterresistance without the extra time and expense of applying a sealer. Contractors found stucco to be a good repair choice for buildings damaged during the war. Weatherresistive barriers are now allowed in walls in which the waterresistive barrier is the only combustible component and the exterior wall has a fireresistant wall covering of brick, concrete, stone, terracotta, stucco, or steel. Xtreme weatherblock is a 100%, acrylic, elastomeric, waterproof membrane and air barrier designed for use as a waterresistive barrier behind exterior claddings including thinstone veneer application. Should exterior stucco be sealed to prevent water damage. The paper is a line of defense against moisture and is also referred to as the water resistive barrier in a three coat stucco system. A bond break shall be provided between the water resistive barrier and the cement plaster stucco. Rain is the single most important factor to control in order to construct a durable structure. Drainage plane behind exterior wall cladding building. Start at base of wall and overlap flashing flanges and in a shinglefashion by a minimum of two 2 inches horizontal and six 6 inches vertical. Reviewing the good, better and best water resistant barriers. Hydrotex waterresistant barrier features advanced, 2ply construction and helps protect against water intrusion and air infiltration from the outside while permitting great breathability. The irony is rich and deep here since eifs, the facesealed kind, was fingered by many as the cause of major stucco failures in the early 1990s and hardcoat stucco was held up at the time to be the cladding of choice, whereas today watermanaged eifs is the obvious answer to the current rash of hardcoat stucco failures.
Jul 12, 2017 weather resistive barriers are now allowed in walls in which the water resistive barrier is the only combustible component and the exterior wall has a fireresistant wall covering of brick, concrete, stone, terracotta, stucco, or steel. Polymer modified, reduced cracks, maintains paint gloss and color. They dont indicate a water resistive barrier anywhere in their instructions, which is problematic. The water resistant surface could be house wrap, rigid foam insulation that is taped or sealed at all seams, or a paintedon coating. Remove damaged lath minimum 1inch in all directions beyond area of concern. Commercial cement plaster ccp 2 ccp 2 is a traditional stucco assembly over wood or steel frame construction with a dryvit approved sheathing and a dryvit polymer finish. Please reduce your quantity or change your pickup store to check stock nearby. Repair waterresistive barrier system as necessary to correct any damage that is either existing or caused by stucco and lath removal actions. May 11, 2015 water resistive barriers wrbs, used as part of an exterior wall system, are designed to prevent air and water from entering the stud wall cavity from the outside.
Transitions and terminations are then most critical at the weatherresistive barrier. The paper must be continuous and properly shingled over each sheet and accessories to direct the flow of water. Weather protection requires exterior walls provide a building with a weatherresistant exterior wall envelopedesigned and constructed to prevent the accumulation of water within the wall assembly by providing a waterresistive barrier behind the exterior veneer. An impact and puncture resistant, cement plaster rain screen stucco system with enhanced water management.
Designed for use as waterresistive barrier behind lahabra eifs or stucco. I am laying out the way i would recommend doing it and know that there. Aquashield is added during mixing and offers the benefits of longlasting water resistance without the extra time and expense of applying a sealer. If two adjoining systems both employ drainage concepts, the weather resistive barrier of both can tie together. The waterresistant surface could be house wrap, rigid foam insulation that is taped or sealed at all seams, or a paintedon coating. Dec 19, 2017 the first step in determining what kind of water damage youre working with. Weather resistive barriers shall be installed as required in section 1402. Stucco is actually a porous material and is designed to allow the absorption of water. Roof coatings vegetated roof systems underlayments mastics, cements and sealants hot rubberized asphalt roof adhesives and primers repair fabrics and reinforcements sbs modified bitumen builtup roofing spray foam.
I am not familiar with the deck2wall spacers just reading on their website they recommend application directly over structural sheathing not siding or stucco. The sheathing underneath the waterresistive barrier is osb common in houses built after 1980 there is plastic sheeting underneath your houses interior drywall and you use air conditioning common in houses built after 1970 in canada and the northern part of the usa the more of those that are true, the more risky stucco is on your house. However, preventing or minimizing water leaks on existing stucco siding is limited to a few options. Install stuccowrap behind stucco air and waterresistive. Transitions and terminations are then most critical at the weather resistive barrier. Simple hand tools and attention to minor details are all it takes to install it.
This happens as the rubber stops eventually break down and the tongue or driver is able to shoot past the gate or safety. If your mason is suggesting the use of vertical strapping behind bricks, i would choose another mason. Assume that 3coat stucco leaks, and detail the building envelope with careful flashing and a doublelayer water resistive barrier. If there is no wood sheathing, then roofing paper is ok. Can stucco or plaster gun staples rip the water resistive barriers hello everyone, in this video i am explaining what to do if you notice the staples tearing your water resistive barriers. Lap either material at least 2 inches horizontally and 6 inches vertically. This next generation vapor permeable air barrier picks up where traditional polymeric wraps leave off. It is also excellent in hiding flaws, is fungi resistant, and is naturally equipped with thermoregulating properties the house will stay cool during summer and warm come winter season.
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