Intersection Of Stucco And Roof Waterproofing

Cantilevered deck joist stucco 2020 detail.

Intersection of stucco and roof waterproofing.

Properly installed it s tough durable and attractive but it s not waterproof. With sections where the roof does not extend over the stucco wall or where the stucco wall and roof intersect a special type of metal flashing called kick out flashing must be installed to prevent water intrusion. Three coat stucco is the most common exterior cladding here in southern california. You need to begin with a clean surface.

By using a waterproof barrier between the home and stucco you add an additional layer of waterproof protection. The water that does penetrate behind the stucco will then be trapped there or worse forced down the inside of the walls and ceilings possibly causing damage and mold. Testing performed by the national concrete masonry association ncma indicates the stucco renders the wall as waterproof as if not more than those where admixtures and sealers are applied. Flashing is a waterproof material aluminum steel pvc that is used to keep water out of any openings in the stucco such as where windows and doors are placed or at the intersections between stucco and roof.

Finally from an economic standpoint stucco applied over lath systems costs three to four times that of stucco direct applied to the cmu. However detail asph 4 in the roofing and waterproofing manual provides a blow up of the eave that more clearly depicts the proper integration between the metal drip edge and the roof underlayment. The next problem area is where the roof and stucco meet. Flashing a nail flange window 2018 rev detail.

And intersections in sealant at time of installation. An alternative detail is provided that depicts ice dam protection membrane installed over the roof deck extending over the fascia and. In addition wrb paper should be installed at the soffit line and at the top of the stucco walls. In our page top photo my grandson tanner gilligan points out the white caulk that was installed as a stopgap measure where the builder has installed a bay.

Simply paint the sealant onto the stucco and allow it to air dry. This article illustrates and discusses alternate or rather goofy attempts at roof wall intersection flashing to prevent leaks water damage and points out where leak risks may remain. Sill pan for nail flange windows 2020 detail. Below are more photos of poor flashing at roof to wall intersections with different exterior wall covering materials.

No matter how skilled the. The roof flashing cannot be installed on the outside of the stucco and counter flashed. A great way to add waterproofing to stucco is to waterproof before you apply the stucco. Control joint at floor line 2016 detail.

Step 1 clean base wall. Kick out flashing for stucco 2019 detail.