Slate Roof Contractor

Slate Roof Replacement in Dover

Slate Roof Replacement Folkstone Road Dover

Ballman Roofing services include providing access, materials and labour to complete the job, then safe disposal of all waste material. New projects, from scratch, extensions and re roofs.

Types of Slate
* Natural Slate (many grades and regions available)
* Fibre Cement Slate
* Cambrian Slate

* Natural Slate (some slate regions include)
-Spanish, Chinese and Welsh

Ballman Roofing Contractors in Kent will supply natural and manmade slate and our highly skilled and experienced workers will fix the covering to your roof structure.

Reasons to use slate products as a roof covering include:

Conservation Areas – Property in Conservation Areas with slated coverings will be required by the Local Authority to retain a slated finish.  Providing the roof covering is like for like and thermal qualities are not reduced, there is no need for planning permission.

Appearance – Many of our customers opt for a slate roof because it is aesthetically pleasing and stands the test of time much better than any other roof covering. We have completed projects that entailed us removing a tiled roof covering and replacing with slate, purely for cosmetic purposes.

Moss Build Up – Moss build up is one of the first things that spoils the appearance of a roof and over time can break down cement work, block gutters and damage the roof structure. Natural slate provides the highest moss build up prevention.

Fibre Cement Slate
Fibre cement slates are a cheaper option to natural slate and from a distance can give the same appearance. They are easier to work with and the economies of scale are more rewarding. However they are not as good at repelling moss growth and their appearance does not maintain attractiveness and they do not last as long as natural slate.

Cambrian Slate
Cambrian slate is a single lap system that gives a slate appearance, opposed to all other slate products that have a double lap. This product has a very long life expectancy, but it not a good option if making later alterations, extensions, dormers etc –  the reason being the slate is nailed and clipped and once in place it is very difficult to remove.

Slates are a more costly roof covering compared to a tiled roof.  This is due to the fact that slate is more time consuming to fix than tiles as every individual slate has to be aligned and fixed into place with two nails.  Further, the cost of the slate is generally more expensive per square metre than a tiled roof. Slate costs vary, depending on the slate, ranging from £0.85 to £2.50 each slate.

What slating Involves

Positioning the battens:
The spacing up the roof between the battens is known as the gauge, this usually varies according to the size of the slates, the pitch of the roof and the degree of exposure. The battens have to be set out so the slate sits half way on the batten and in position for the slate holes to be fixed.

Laying the slates:

New Slate Roof and Slate Roof Repairs

Slate Roof Contractor

Slates are laid on the battens in a ‘brick bond’ pattern, i.e. with the joints between them aligned with the centre of the slates above and below, and with about 3mm between the side. This layout gives a double lap covering.

The top row of slates at the ridge is also made up of half slates to give the next row down a double lap. The top edge of the second row down must be at a level where it will be covered by the ridge tile.

Cutting the slates:

Slate is by nature a layered material, which can tend to flake.

Using a pair of slate cutters is the preferred option (these support both sides of the cut underneath, while the cut is made by a blade coming down between the supports).

Alternatively, a guillotine, grinder or brick laying trowel can be use to chop the slate.

Fixing the slates:

Aluminum nails or copper should be used in preference to galvanised nails, as aluminum will not corrode, whereas the galvanised coating is prone to. Alternatively, other options include copper or stainless steel nails.

Slates can be either nailed at the center line or near the top. When slates are nailed at the top, the nails are covered by two slates and so are less exposed.

Most artificial slates come with the holes already drilled, where necessary nail holes should be drilled at least 30mm in from the edge and 25mm in from the top.


The slates fitted to the verge are 50% wider than the rest, this ensures that the pattern is maintained without having to cut down and use half width slates at the verges.

Sometimes half width slates are used down the verge, underneath the other slates, to form a triple lap – this has the effect of tilting up the end slates so that water tends to run onto the roof rather than over the edge.

The edge of the slates project about 50mm over the edge of the verges and any space between the lower side and the verge is filled using mortar, or a timber trim can be fitted to the underside of the side of the slate overhang to finish.


The ridge and hips are finished with ridge tiles, normally blue or red terracotta angular style, or lead flashings .
The ridge tiles are bedded on and jointed with cement mortar (3:1 sand:cement); it often looks better if a coloured pigment is added to the cement so that it is similar to the ridge tile.

Call now for a quote for your slate roof in HerneBay.  Ballman serve all of Kent and are your number one roofer in Canterbury