Plastic Alternative to Roof Cement

Thank you for visiting Daniel’s Roof and our guide to plastic alternatives to roof cement.

Cement is traditionally used to hold down and secure the roof tiles on gable end sections, this cement also acts as a barrier to prevent rodent entry to the loft space. This has been the preferred method for centuries and is still a popular method that is used today, there is however an alternative.

Plastic “end caps” can be used to seal the gap and secure the gable end tiles. This is known as a “dry verge” system as it does not involve the use of wet cement.

There are two options, the first is a continuous dry verge, this is not so popular as it removes the “stepped” effect that is achieved with roof tiles that overlap each other. The second option is an inter connecting universal dry verge. Both are made from UV stable plastic and are available in a range of colours.

Klober Dry Verge System

In the image below you can see the Klober terracotta dry verge system and how it looks when installed to a typical roof-line. Each section is nailed to a timber baton and the plastic unit is then clipped into place. This allows for an unlimited length and they can also be used with either plastic ridge tiles or traditional concrete ridge tiles.

Because the dry verge system is universal it is suitable for almost any profiled concrete tile. If you have a slated roof then you may wish to look into the continuous dry verge system as slates are flat and do not require a stepped unit. The same may apply to simulated slates such as asbestos and other flat profiled roof tiles.

Plastic alternative to roof cement at the apex/gable

The installation of a dry verge plastic system will require the removal of the existing cement and temporary removal of the gable tiles.

The timber batons will most likely require extending to 20mm beyond the wall or bargeboard. A fixing clip should then be nailed to each baton end. Once each plastic unit is installed it should then be nailed through the face directly into the end of the baton. Eaves and ridge end sections are used to start and finish off the length.

The image below explains in more detail how the sections are installed to the gable.

Hot tip: The batons on a typical property are usually cut far too short and need to be extended, if this is the case then you should never nail the new baton onto or next to the existing, instead the next three or four courses of tiles should be removed, the existing baton should be cut at one of the rafters (preferably two/three rafters back) and removed, a new baton should then be installed. Never use “add ons” to extend the existing baton by a few inches as they will not be secure enough to cope with the high levels of wind that is experienced on a gable end section.

How to install the dry verge system

Advantage and Disadvantages

This product was designed to replace roof cement which often cracked if it was laid incorrectly. The following is just my opinion, based on what I have experienced:

Advantages:

  • Much quicker to install when compared to traditional cement
  • Choice of colours and styles
  • Can be installed in any weather conditions

Disadvantages:

  • The colour appears to fade quite quickly
  • Some people (including me) may feel it looks too “plasticy”
  • If one section is damaged, the entire section must be removed and reinstalled
  • Only as secure as the timber it is nailed to, I have seen several of these blow off with mild wind

 

Where to Buy This Product

I have seen a similar product for sale on Amazon:

Click here for right-hand verge caps

Click here for left-hand verge caps

Otherwise you would most likely need to purchase from a roofers merchant or roofline stockist. Most will keep this item in stock.