Permadeck®
the permanent roof
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it's easy and quick

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Permadeck v Pitched
Throughout the ‘80s and into the ‘90s many flat roofs were converted at great cost into pitched roofs.  This was understandable since many of these roofs had been re-felted on numerous occasions and the time between leaks could be as little as 4 to 5 years.

So what is involved in converting a flat roof into a pitched one?



Most  flat roofs can’t be converted for a number of reasons. Permadeck is the cost-effective answer.

Converting a flat roof is a major project.  The building was originally designed to have a flat roof which is lighter and lower than a pitched roof so the structure, including the foundations, may not be up to the heavier duty requirement of a pitched roof. And even if it is you will have to prove it.


So, firstly you will need an architect involved to draw the existing and proposed changes and make sure you have the height to get an adequate pitch.  For example, there may be over-looking windows.

Then you will need planning permission because you are changing the building’s appearance and, if required, notify neighbours because they may be entitled to object to the changes (appearance, sunlight etc).


Next you will need a structural engineer to check that the foundations, walls, size of openings (windows and doors), lintels, adjoining structures, drainage etc are suitable for the significant weight increase of a slate or concrete tile roof.  


Either the architect or engineer will re-design your ventilation and insulation, which is totally different between flat and pitched roofs. Then you can apply for a building warrant.


Permadeck®

Pitched conversion

Architect

£0

£?

Structural Engineer

£0

£?

Planning Permission

£0

£?

Building Warrant

£0

£?

Roof trusses, sarking & membranes

£0

£?

Tiles or slates

£0

£?

Changes to insulation

£0

£?

Changes to ventilation

£0

£?

Foundations reinforced

£0

£?

Lintels replaced

£0

£?

Work duration

30-40 sqm / day

Weeks?

Guarantee?

20 years

1 year

Permadeck or Pitched?   Permadeck makes sense.