Fence House Roof Truss Company

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Extensions – Common queries

As with any major building project, there are many considerations to take into account, including roof trusses for extensions. An extension is not  just “added on”; it requires careful planning across:

  • Design and planning
  • Consultation with neighbours
  • Budgeting
  • Choice of Architect
  • Planning permission
  • Building Regulations
  • Choice of builder
  • And project management.

Every stage of the extension building process has the potential to throw up issues and cause disruption, including the roof trusses you choose. Considering the roof structure for your extension is a small part of this – but a vital one.

Roofs form a large proportion of the cost of an extension, particularly pitched roofs. As well as being more pleasing to the eye, pitched roofs create more space and add more value to the building.

We can work with you, your architect, and your building team to ensure the correct specification and planning of the roof trusses for your extension, including joists and full timber frames. Designing a new development for your home shouldn’t be an arduous process, so let us help you complete it on budget, on time and on point.

Here are some of our more frequently asked questions related to extension developments. You can also see a full list of technical FAQs.


What's the approximate additional cost for a room-in-the-roof system?

While the cheapest way of building a roof is with a standard roof truss, they don’t allow for future expansion. An attic, or room-in-the-roof truss, is specially designed to maximise space and allow for further room development. Attic trusses do cost more to buy; you can typically expect to pay between one-and-a-half times and twice as much as for a standard roof truss. However, an attic truss will add value due to the additional square footage, regardless of whether the space is finished.


What happens if I want to make a change to my roof trusses/floor joists/timber frame but they've already been installed?

We often hear this question, and it’s usually because an electrician or plumber wants to drill holes to fit wires or piping retrospectively. We’d never recommend carrying out this type of alteration without consulting us first; often we find we’re asked too late and serious damage has already been done. Roof trusses and joists support your building structure and any alteration to them by cutting or drilling compromises their structural integrity. The only way to avoid expensive repairs or replacements is to eliminate the need for retrospective work through careful planning that considers all of your build stages, including electric and plumbing.


What are your delivery timescales?

We offer a five day delivery service within the UK mainland following the approval of your design.