How Much Does a New Tiled Roof Cost in Warrington?

The cost variables for a tiled re-roof are much the same everywhere: area and shape, the tile, the condition of the timbers, access, and the work that goes with it. Those are covered at the end.

The more useful thing for a homeowner in a town with as much tiled housing as Warrington is how to tell whether a quotation describes a properly specified roof or a cheap one. There are published requirements behind all of this, and several of them you can verify yourself.

The Standard That Governs the Work

Slating and tiling in the UK is done to BS 5534:2014+A2:2018 — the code of practice for slating and tiling for pitched roofs and vertical cladding. It covers fixings, wind-uplift resistance, underlay, battens and mortar.

Two things worth knowing about its status. It is not law — and you will occasionally see it claimed that it sits inside Approved Document A, which it does not. What it is, is the recognised standard of workmanship: Building Control treat compliance as the accepted way of showing a roof meets the relevant functional requirements, and manufacturer guarantees are routinely conditional on installation in accordance with it. A roof that does not follow it is very hard to defend as workmanlike.

The A2 amendment, effective from 2018, also brought normal re-roofing work — including repairs — explicitly into the standard's scope. So it applies to your job, not just to new build.

What the 2014 Revision Actually Changed

This is the part most commonly misreported, so it is worth being precise.

Mortar was not banned

Mortar bedding remains permitted. What changed is that mortar no longer counts as a fixing. Ridge and hip tiles must be mechanically fixed whether or not mortar is also used. So "dry ridge is now a legal requirement" is wrong; mechanical fixing is required, and a dry-fix system — to BS 8612:2018 — is simply the usual way of achieving it.

"Every tile must be nailed" needs qualifying

So the blanket claim is true for the interlocking tiles on most modern roofs and false for plain tiles. If a contractor tells you every tile must be nailed on a plain-tiled roof, they are overstating — though there is nothing wrong with doing it.

Verges and perimeters

Verge tiles are perimeter tiles and must be fixed at least twice. Where a dry verge system is used it should conform to BS 8612:2018.

The Fixing Specification — the Best Question You Can Ask

This is the single most useful thing in this article.

How a roof is fixed is not a matter of habit. It is a calculation, specific to your address, based on distance from the sea, altitude, terrain and topography, the height and dimensions of the building, the roof pitch, and the tested resistance of the particular tile. BS 5534 works alongside the Eurocode wind loading standard, BS EN 1991-1-4 with its UK National Annex, to arrive at it.

Tile manufacturers produce these specifications, and they produce them free. A competent roofer can obtain one for your roof in minutes.

The Tile Itself

Clay tiles are made to BS EN 1304:2013; concrete tiles to BS EN 490:2011+A1:2017. Unlike natural slate — which carries the W, T and S grading under BS EN 12326 — tiles do not have a simple letter grading. Instead the manufacturer declares performance values on a declaration of performance, and those are what you can ask to see.

What to look for on a clay tile's declaration

• Frost resistance to BS EN 539-2. There are three levels, and Level 1 — a minimum of 150 freeze/thaw cycles — is what UK use requires. Ask for Level 1.
• Impermeability — Category 1 for UK use.
• Flexural strength to EN 538.
• Dimensional tolerances to EN 1024.
• Reaction to fire and external fire performance.

Concrete tiles declare an equivalent set of characteristics under BS EN 490 — dimensional tolerances, mass, transverse strength, permeability and durability — tested to BS EN 491. (BS EN 490 is the product specification and BS EN 491 the test methods; the two get swapped constantly.)

Choosing between them

Pitch and Headlap, Which Are Linked

Every tile has a minimum pitch, and it is set by both the standard and the manufacturer. BS 5534 gives general minimums — plain tiles around 35 degrees, interlocking tiles lower — but the actual figure for a specific product comes from the manufacturer's testing, and for a purpose-designed low-pitch tile it can be a great deal lower.

The relationship with headlap is inverse: the lower the pitch, the greater the headlap has to be. The same tile might be approved at 22.5 degrees with a 75 mm headlap and at 17.5 degrees with 100 mm. Exposure increases the required headlap independently of pitch.

This matters commercially as well as technically. Increasing headlap means more tiles per square metre. Reducing it means fewer — which is a quiet way of making a quotation cheaper. Ask what pitch your roof is, what headlap the tile is being laid at, and for the manufacturer's data showing that tile approved at that combination.

Two Things You Can Check With Your Own Eyes

1. The battens

Roofing battens under BS 5534 must carry indelible marks showing the supplier, a species or origin code, the size, and the words "Graded BS 5534".

That is printed on the timber. When your roof is stripped and the new battens are going on, you can walk out and look at them. Ungraded timber is a common and completely visible corner-cut, and this is the easiest quality check available to any homeowner.

2. The underlay

Roofing underlays are made to BS EN 13859-1:2014, and BS 5534 adds the installation and performance requirements — including a wind-uplift classification, so manufacturers declare which UK exposure zones a product suits. There are also practical requirements: laps secured, limited drape between rafters, limited exposure to sunlight before tiling, and a proper eaves detail so water discharges into the gutter rather than behind it.

Ask which underlay product is specified and what classification it carries for your exposure — particularly if the property is elevated, near open ground, or unusually tall. Then, while it is going on, look at whether it is dressed into the gutter at the eaves rather than stopping short.

What Sets the Cost

• The tile — the largest lever, and the fixing baseline that comes with it.
• Headlap — which sets how many tiles per square metre.
• Roof shape — hips, valleys, dormers and chimneys all add cutting and lead.
• The fixing specification — a more exposed site needs more fixings and clips.
• The timbers — unknown until the strip.
• Access and scaffolding, plus a footway licence from Warrington Borough Council where one is needed.
• Everything else — lead, ventilation, insulation, and usually fascias, soffits and guttering while the access is there.

Regulations

A like-for-like tiled re-roof needs no planning permission — it does not materially affect external appearance, so under section 55 of the Town and Country Planning Act 1990 it is not development. Warrington has no Article 4 direction, though it does have conservation areas including Bewsey Street and Bridge Street, so check the position with Warrington Borough Council before changing the covering.

Building regulations apply regardless: renewing the covering renews a thermal element under regulation 23 of the Building Regulations 2010, and Approved Document L Volume 1 gives 0.16 W/(m²K) for a roof in an existing dwelling.

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