Domestic & commercial roofing contractor services in London
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Pitched Roofing

Pitched Roofing

The longevity of a roof covering is generally governed by the quality of the source materials used, the age of the slate/tile and the degree of exposure.

Old tiles and slates can absorb water which then freezes and expands. White powdery salts under the tiles can indicate erosion and the projecting nibs at the top of each tile can break.

The need for complete re-covering is rare; a well laid roof should survive for 40 – 50 years before substantial works are required. Surveyors can sometimes be guilty of erring on the side of caution, so get a second opinion before commissioning a complete re-roof. Most issues can usually be overcome with the aid of localised repairs rather than a complete re-roof however there will always come a time, unfortunately, when a series of patch repairs is no longer the correct way forward.

It’s worth noting that some roofers may be tempted to utilise inferior, cheaper materials when recladding older roofs.

Things you should be aware of:

  • It is important to note that under current building regulations, where more than 25% of a roof covering is being replaced, it is a requirement to upgrade the insulation to meet current standards. We will always price for replacement based on the use of Tyvek Hybrid. Cheaper products are available however their performance is not as reliable therefore it essential to ensure that other estimates contain provision for this product of similar quality.
  • If the existing roof covering is to be replaced with a different material to its original, for example slate to tiles, then approval under the Building Regulations is likely to be needed to ensure the roof will be adequate in terms of structural stability (applicable where the replacement tile will be significantly heavier or lighter than the existing), and also meets requirements in respect of fire safety and energy efficiency (see above).
  • If there is any work required on the Party Wall/s then a Party Wall surveyor should be engaged by the client prior to works commencing.