PVC moulding and millwork are also used in exterior applications:
- Drip cap,—over a door or window to keep water from flowing under the cladding
- Shingle mould—at the top of the last row of siding and the soffit
- Board and batten—across a joint where two parallel panels or boards meet
What is the purpose of a drip cap?
The lowly drip cap needs to be taken more seriously to prevent leaks and rot. Early in my building career we ordered the stock uncoated aluminum drip caps from our local building materials supplier to install over window and door head trim and skirt boards / band boards.
What is a window trim drip cap?
A window trim drip cap can help avoid this costly problem by directing moisture away from the window from the top down. Preformed window trim drip caps are easy to find and install as a quick and easy project that will pay dividends in window maintenance costs down the road.
How do I choose the best drip cap for siding?
Most siding installers today fabricate their own drip caps to ensure these qualities, and you should include and verify those standards in your construction guidelines and details. To ensure intended performance, the lower edge of the drip cap should lap ¼-inch over the trim it’s protecting and, for best results, should include an outward kick.
What is a drip edge and why is it important?
Without a drip edge, an excellent roof might succumb to rips, water leaks, and cracks at an inopportune moment. But you don’t have to worry about dealing with drip edges. In this article, you will know more about it and its importance. What is a drip edge? A drip edge is a component put to the edge of a rooftop in a roofing structure.
Where do you put a drip cap?
A window drip cap is an L-shaped flashing that covers your windows after they have been installed but before your siding is installed around the window frame. One leg of the “L” goes over the window while the other leg lies behind the siding that will go above.
What is a drip cap in construction?
Drip Cap – molding or metal flashing which projects over the exterior topside of a door or window frame causing rain water to drip beyond the outside face of the frame. It may also be located between the top edge of any trim or frieze board and the siding that is installed over it.
Does drip cap go over trim?
When you install siding over trim that's protected by a drip cap, leave a 3/8-to-¼-inch gap between the drip cap and the bottom of the siding. Unfortunately, I've been on a lot of jobs where the bottom edge of the siding rests directly on the drip cap, often because homeowners don't like the look of the resulting gap.
Is drip cap the same as drip edge?
Drip cap is similar, sitting on top of doors and windows. A drip cap directs water away from house the same way drip edge does. Often made from wood, drip caps can rot which is why you might need to buy a replacement like the aluminum drip cap below.
How do you install drip cap molding?
0:511:33How to Install the Integrated Drip Edge - YouTubeYouTubeStart of suggested clipEnd of suggested clipFirst lay the trim board in place and fasten it to the structure according to the standard Azek trimMoreFirst lay the trim board in place and fasten it to the structure according to the standard Azek trim installation guidelines then fasten the integrated drip edge interface.
What is the purpose of drip edge?
The purpose of a drip edge is to help redirect water from the fascia and into the gutters. The gutters then carry this water away. Drip edges can be installed on the rake, eaves, and gable of your roof. They extend beyond the fascia and are a minimum of one-third of the gutter width.
Should drip cap be caulked?
Drip caps must be installed properly to be effective. Don't caulk the seam where the siding meets the drip cap. If water gets behind the siding, this seam opening allows drainage. It's important that a drip cap slopes down and out away from the house.
How wide should a drip cap be?
Drip edge varies in dimensions but typically the flange that nails to the roof surface is about 2.5" wide and the vertical edge that directs roof runoff down and away is about 1.5" in depth. Lengths of drip vary but typically it's sold in ten foot lengths (120").
Where can I use drip edge?
Drip edge is installed around the whole perimeter of the roof. It is used to hold the underlayments down and create a watertight seal around the edge of the roof. Only the face of the metal is seen and is usually just white one to one and half inch stripe located right under the shingles and above the fascia.
Do you install gutters under drip edge?
It is recommended that gutters are placed under or 'behind' the drip edge of your roof. A drip edge refers to a component that hangs over the roof and has an outward projecting lower edge.
Do you need drip edge on metal roof?
A drip edge is not needed for metal roofing. If you make sure to overhang your metal roofing at least an inch, the drip edge is not necessary at the eaves and rakes. If the metal roof is hanging over an inch, the water will be directed away from the fascia anyway if at a slant.
What is drip cap?
proper installation of a type of flashing known as Drip Cap. Drip cap can come in various sizes, depending upon the thickness of the piece of trim that it is being put in place to protect. One can make drip cap themselves if they are handy with a metal-bending brake. Above doors and windows, the drip cap is placed above the top ...
Why is a drip cap important?
Drip cap is EXTREMELY important! If it is not accurately in place above door, window, or water table areas, rotted wood is something that is bound to happen and is never a question of “if” but “when” the moisture being allowed to penetrate the backside of the trim, will rear its ugly head, in the by-product of these rotting wood situations ...
Where is the drip cap on a door?
Above doors and windows, the drip cap is placed above the top of the top-most piece of trim of the door or window (the piece that horizontally travels across the door or window).
What is a window drip cap?
What are window drip caps? A window drip cap is an L-shaped flashing that covers your windows after they have been installed but before your siding is installed around the window frame. One leg of the “L” goes over the window while the other leg lies behind the siding that will go above.
Can you use a window drip cap instead of caulking?
While caulking may be an option instead of the window drip cap, it is not recommended . Years later the caulk will break down and crack, still allowing water seepage to happen. Window drip caps are a longer lasting option to prevent water seepage and provide better coverage than caulk.
What is drip cap?
Drip caps are an essential component of a waterproofing system that includes properly installed exterior cladding, trim, a weather-resistive barrier (WRB), and flashing tape. They should be used wherever water can get behind the horizontal edge of an exterior finish material or assembly to help mitigate water intrusion.
How far should drip cap be over trim?
To ensure intended performance, the lower edge of the drip cap should lap ¼-inch over the trim it’s protecting and, for best results, should include an outward kick.
How much gap should I leave between drip cap and trim?
When you install siding over trim that’s protected by a drip cap, leave a 3/8-to-¼-inch gap between the drip cap and the bottom of the siding. Unfortunately, I’ve been on a lot of jobs where the bottom edge of the siding rests directly on the drip cap, often because homeowners don’t like the look of the resulting gap.
Do you need slope to install drip cap?
You don’t need much slope, but you do need enough to help water drain off. When you install siding over trim that’s protected by a drip cap, ...
Do you need a drip cap for waterproofing?
Absolutely. When it comes to waterproofing homes, don't overlook the drip cap. (Photo: courtesy IBACOS) This article first appeared in the March 2019 issue of Pro Builder. Drip caps are an essential component of a waterproofing system that includes properly installed exterior cladding, trim, a weather-resistive barrier (WRB), and flashing tape.
What is window trim drip cap?
Exterior Sealant. Any window trim that has the potential to be exposed to moisture—either from inside or outside—has the potential to succumb to wood rot. A window trim drip cap can help avoid this costly problem by directing moisture away from the window from the top down. Preformed window trim drip caps are easy to find and install as a quick ...
How to prevent rain from blowing in sideways?
In order to prevent rain from blowing in sideways and harming the window, you will need to create flaps out of the drip cap. To do this, cut lengthwise along the edges of the drip cap and fold the resulting piece in towards the window to create wind-resistant sides.
