What is Undercloak on a roof?

A core component of any roofing project, undercloak is a strong tile or fibre cement strip that is fixed at the roof verge, beneath the battens. This will provide an effective underlayer to support a bed of mortar and allow for mortar adhesion, whilst also offering a clean finish to the verge detail.

Is Dry Verge any good?

Dry verge roofing makes use of interlocking caps that fit over the edge of your roof tiles, and offers an effective and, more importantly, durable alternative to wet verges. It goes without saying that dry verge roofing offers all the roofline protection required just as, if not more, effectively than wet verges.

Does Undercloak go on top of felt?

the undercloak always always sits ontop on the felt which sits ontop of the joists and not on a bed of cement. unless you’re bedding the cloaking on a wall eg.

Is Dry Ridge better than cement?

Mortar-free, dry ridge systems are also tested to withstand extreme weather conditions, and require little to no maintenance over time. A dry ridge system is almost certainly the best option for a property, but for a quick, easy and cheap temporary fix, they may wish to stick with wet ridge repairs.

How long does dry verge last?

10 years
On the other hand, dry verge systems are made of plastic and will last at least 10 years. They generally need very little maintenance (if any at all) and will continue to look slick and new long after they’ve been installed.

Are hip irons necessary?

Traditionally, roof hip irons were used to hold the eaves hip tile in place while the fixing mortar was drying. Hip irons are also useful as a safety feature to prevent hip tiles from slipping when the fixing mortar cracks or fails.

Should there be gaps between roof tiles?

There should be no gaps wider than 4mm between the tiles or the surrounding perimeter construction or penetrations such as roof windows. Tiles with cut back interlocks look neater, but can result in debris collecting and blocking the water path from the side interlock.

What is an Undercloak on a roof?

How do you bed an Undercloak?

Undercloak fixed to a line suspended between verge clips. Before bedding an undercloak it is important to make sure that the brickwork or stonework at the gable end is correct. It should be cut neatly to a line about 10mm below the rafter line for a slate or fibre-cement strip undercloak, or about 25mm for plain tile undercloak.

What is a corner Undercloak?

The undercloak (board or 4″ wide bits of tiles) buts up to the batts and are held in place by nails knocked into the ends of the batts. The undercloak is layed on a flat bed of cement and projects over the verge edge by 2″. The corner undercloak is a full tile and is notched at the top LHS corner to fit around the lower batt. NAF, Oct 17, 2005

How far below the rafter should an Undercloak be cut?

Before bedding an undercloak it is important to make sure that the brickwork or stonework at the gable end is correct. It should be cut neatly to a line about 10mm below the rafter line for a slate or fibre-cement strip undercloak, or about 25mm for plain tile undercloak.