How much does dry verge cost to fit?

At the gable end of a house the roof stops at the verge, a sloping border that runs from the eaves up to the ridge. Traditionally the outermost tiles rest on mortar spread over the head of the wall. A dry verge replaces that bed with a mechanical system: a verge unit or cloak tile held by fixings through the tiles and the batten, so no mortar is needed to hold the edge.

BS 8612:2018 sets the performance tests that dry-fixed verge systems are held to. Our guide to replacing mortar verges on gable ends shows the method step by step.

The reason people choose it is the edge itself. A verge takes the wind first, and a mortar bed along it cracks and falls out over time. We explain the failure in why mortar is falling out of a roof verge.

Length is the biggest factor, and a verge is measured up the slope on each gable end. A gable on a bungalow is short. A tall house with a steep roof has much longer verges. Both sides of a gable count, so a house with two gables has four runs to do.

The tile profile comes next. Verge units are made to suit plain tiles and common interlocking profiles, and an older or unusual tile may need a different detail or a careful match. What lies below matters as well: a bargeboard or fascia that has rotted, bedding that has lifted off the masonry, or tiles cracked at the edge all add work.

Lastly, access. A verge sits at the roof edge, so work from the ground is often impossible and scaffold or a tower is needed. Checkatrade's scaffolding guide quotes around £875 to hire scaffold for a month at a semi, though a short job uses it for far less time. Find out if VAT and scaffold are counted in a number before you compare it.

A mortar verge costs less in materials and has been the standard for generations. It does need maintenance, because the bed cracks as the roof moves and the weather works into the joint. BS 5534 changed in 2014 so that mortar no longer works alone on ridge and hip tiles, and the same thinking is why we fix verge tiles mechanically as well.

A dry verge stops mortar being the thing that holds the edge. The system clips or screws the verge tiles down, and the edge stays neat and even along the run. Cracked mortar no longer drops into the garden or leaves an untidy line when seen from the street. We finish it level and square, which is the point of the job.

Some roofs are better served by lime or traditional mortar, particularly period or listed buildings where appearance and materials matter. We tell you which route suits your house, and we do not recommend a system the roof does not need.

A dry verge is not free of faults. If the wrong unit is fitted for the tile, or the fixings are not matched to the batten, the edge can rattle in wind or crack at the unit. Poor spacing or a bent cleat can do the same.

Fitting it over a poor base repeats the same trouble. If the edge tiles are lifting because the battens are rotten, new verge units will not hold. The right order is to put the structure right, then fit the system. That is why we look first, and why the price follows what we find, not a guess made from the street.

The cost of your own gable end depends on what appears when the old edge is stripped back. Rotten boards, a loose wall head or cracked tiles each add time. Our written price allows for what the visit shows, and it arrives as one sum.

Ask what each roofer plans to fit and to which standard. A system tested to BS 8612:2018 is a good sign. Check that the price includes every metre of verge on each gable, the removal of the old mortar, new fixings and making good the wall edge. Ask about access and VAT, and what happens if rotten boards are found.

We go over the gable ends with photographs of each problem and tell you the verdict before any price: anything from a handful of refixed tiles to a complete refit. If a few loose tiles can simply be refixed, that is the job we recommend. The price we give is, we think, good and fair.

The site is cleared and waste goes with us. For the work at the top of the roof, dry ridge cost covers the cost side, and the ridge tile repairs hub explains the full range of fixing methods. Send us pictures of each gable from the ground and we will describe what we expect to see.