Flexible Drip Cap Flashing for 3/4″ and 1″ Thick Casing

We supply flexible drip cap flashing with our custom made exterior curved mouldings.

Even if we have not made your solid wood or PVC exterior casings we can still provide this medium weight flexible drip cap flashing to protect your curved opening installaton.

Click Here to go to our main DRIP CAP page for other options.

Flexible Drip Cap for 3/4″ and 1″ Casing

Price: $6.00 per foot.
Call us with questions or to place an order.
(860) 923-2771

As an alternative to our 1 1/4″ drip cap that comes in molded 6′ lengths we offer this 3/4″ and 1″ flexible drip cap flashing that is produced in 50′ long rolls. As such we can cut and ship precisely the length you need in order to wrap the top of your arched installation without the need to join multiple pieces.

This flexible flashing is constructed using two separate materials. It has a soft flexible membrane that mounts to the sheathing and a hard plastic cover over the moulding top edge. It is only made in white and while it is not designed to be painted you may have success with some of the new plastic paints.

It is available in two sizes: 3/4″ and 1″


  • Available in up to 50′ continuous length.
  • Soft rubberized flange conforms easily to uneven building surface.
  • Flexible PVC cap that wraps over the top of the moulding.
  • Available in 3/4″ and 1″ versions.
  • Only available in white.
  • Not designed to be painted.

This product is also made from weather and UV resistant materials.  It is available in two widths for covering either 3/4″ thick or 1″ thick exterior mouldings.  It has a hard but flexible plastic nosing and a rubberized flange that rolls up the wall.

Installation Procedure

Step 1:  Cut to length   

 Step 2:  Remove tape covering

Step 3:  Wrap flashing around moulding

Step 4:  Nail into position.  “A” = 3/4″  OR    1″


This flashing is available only in white and is sold by the foot.
The cost is the same for both the 3/4″ and 1″ versions.

Cost: $6.00 per foot cut to length
(No minimum length requirement)

This flexible drip cap solves the serious problem of how to keep water out from behind exterior curved mouldings.  Without proper flashing water gets behind the moulding and channels down to the hidden window jamb and wall framing below.  Over time this rots out the trim, window or door frame and the wooden side walls of the building.  We make many replacement mouldings for situations where proper flashing was not used and subsequently the original trim, and often much more, has succombed to deterioration.

IMPORTANT:  caulking trim to prevent water penetration is at best a temporary solution.  Even though high quality caulks are guaranteed to last for many years, they do not prevent moisture from seeping through in a horizontal sealing application. 
Within a few years of installation wind, weather and wood movement will cause the caulk seal to fail and water WILL penetrate behind the window trim. A quality window or door installation will always incorporate some form of water penetration protection, either in the form of a wide ceiling overhang or proper flashing, such as copper, lead, vinyl, polypropylene or this flexible product.

At Custom Curved Mouldings we are concerned about the long term protection of our high quality custom made mouldings. That is why we have invested a great deal of time in searching for a flexible drip cap flashing that is reasonably priced, easy to install and which will provide many years of water shed protection. We feel we have found such a product in both of these flexible drip cap flashings As such we recommend one or the other to all our customers purchasing our exterior curved mouldings.

There are many existing curved opening installations that were not properly protected by drip cap flashing. Plus many more arch top windows and doors are installed every day. As such even though we stock these three flexible drip cap sizes to supply with our own custom radius millwork they are available to anyone who needs to protect an exterior arched opening from the weather.