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Weather protection

Temporary roofs and tin hats

A temporary roof (a "tin hat") is a covered scaffold structure built over a building so the work underneath can carry on whatever the weather is doing, and so the inside of the building stays dry while its own roof is off. It is what you want when the roof is coming off rather than being patched: a re-roof, a structural repair, fire or water damage, or anything that leaves a building open for more than a day or two.

DDJ Scaffolding build them, and have done for years. The firm's own description of its range is "from simple single tower builds to complex tin hats". We are fully accredited and carry £10 million in public liability insurance.

It is a bigger structure than an ordinary access scaffold and it is worth understanding why before anybody quotes you for one. A temporary roof has to carry its own weight, the weight of anything stored on it, and the wind, which is the part people underestimate. A sheeted roof is a sail, so the scaffold beneath it is tied and braced for loads an access scaffold never sees.

Not sure whether you need a full temporary roof or just sheeting and protection? Say what is being done and we will tell you straight. See also chimney scaffolding, access stairs and everything else we put up.

What one is made of

What a temporary roof involves

A tin hat is not one product. What gets built depends on the span, what is underneath it and how long it has to stand, but the parts are the same:

We build them over houses as part of domestic scaffolding and over occupied buildings as commercial scaffolding. On a live site the point of the roof is usually that the business underneath it keeps trading.

Parts of a temporary roof

  1. A scaffold around the building, tied and braced to carry the roof above it
  2. Beams spanning the full width, so there is nothing standing in the middle of the work
  3. A pitched, sheeted covering that sheds water clear of the building
  4. Boarded, guardrailed lifts underneath for the trades to work off
  5. Debris netting or solid protection where the public passes below
  6. Removal and clearance once the permanent roof is finished

Recent work

Roof-level work and weather protection

  • Scaffold beams spanning a flat commercial roof, boarded out and guardrailed, with plant and ductwork alongside
    Beamed span across a roof
  • A pitched temporary roof sheeted over a building, supported on the scaffold around it
    Sheeted temporary roof
  • Scaffold sheeting stretched across a lift of scaffolding to keep weather off the elevation behind it
    Weather sheeting to an elevation

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Planning a re-roof?

Tell us what is coming off, what is going back on and roughly when. We will talk you through whether the job needs a full temporary roof or something simpler, and what it will cost. Quotes are free and we do not charge for advice.

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Aerial view of a house with a newly tiled roof, by Dchampion Roofing