Extension of Wood Frame Cost, Planning & Finish.

In view of the extension of a wooden frame? This guide describes everything from planning approval and financing to cost effects and the construction process.

The construction of a wooden framework extension has many advantages, not just the additional space and added value it brings to your location.

With the extension of the wooden frame you can achieve the weatherproof stage in days rather than weeks, not only reducing your spend on the site, but also reducing your dependency on good weather and lower disturbance.

When installed, an extended wood frame can also give good thermal efficiency and aerated power, making it ideal for sustainable projects at its heart.

You will have to consider how the frame is made, how to better select exterior finish, if you need planning permission and what is feasible within your budget, if you decide to opt for a wood-frame extension.

If you want to create a house with a wood frame, look at our wood frame guide for beginners.

Is the extension to a wood frame cheaper than other systems?

Overall, yeah. The cost of the extension of a wood structure is mainly acknowledged as lower than a conventional extension due to the reduction in working hours.

The time needed for its construction is also more predictable because it is less dependent on good weather, particularly when the work is done in winter.

If you propose to remove or raise a current mortgage to help pay for the renewal you should always make sure that a lender has the appropriate external finish, some are very cautious in how they approve the external finish which could restrict your choice of lenders.

Also, remember to add more value to your house than it cost in carrying out the work, for any renovation or extension projects .

Do I need a Timber Frame Extension Planning Authorisation?

Not for that matter. If your proposed extension meets certain size and place requirements, you can extend it in compliance with approved development rights (PD). You would need planning permission if you want to create anything outside of the boundaries of the PD.

Although your property is listed or in a protected zone or in an area of outstanding natural beauty, always double-check with your local authority before starting working.

Is an extension of the wood frame built on site?

Most extensions constructed using a wooden frame are “clogged” – here the wooden frame panels are built on site by the timber maker and not assembled in a facility.

A structural engineer must design the wood frame and prepare a specification of the size/grade of the pile-ups to be used for a nailing plan.

The carpenter can deliver the necessary woods and, as they’re loose, they can be handled easily by the handling of the panels through restricted access areas.

In order to then make up the wood frame panels on the premises according to the requirements of the structural technician, the joiner would open/expose the existing structure at this stage, which would allow him to take exact measurements and to produce the panels accordingly.

If the design of your choice involves wide glazing areas, a frame/goal post arrangements for the steel or glulam portal might be appropriate. This can be assembled off-site in pieces and bolted on site.

Be aware that the construction will not suit this aspect of the build if any portion of the expansion was below finished ground level.

You will find that producers are unwilling to quote extension projects because compared to a new build they need a lot more technical input. To ensure that floor levels, eaves and roofs are in keeping with the current housing, very specific site measurements must be given for an expansion.

Precise measurements can also be virtually impossible before elements of the current structure can be opened/exposed to ascertain just how it was designed. That can lead to substantial delays, as most manufacturers have a lead time of at least 6-8 weeks before their delivery date, from having all the details they need.

Providing a quote, if site access is very restrictive, may also be delayed by producers. And since 3.6 x 4.8m needs just part fee, the standard one-story expansion makes transporting costs uneconomical compared to ‘house sticks.’

What external finish fits better on an extension of the wood frame?

The extension of the wood frame can be finished in different materials externally, including:

• Concrete façade

• Brickwork rendering / blocking

• natural stone natural stone

• Stone restored

• Slips of brick

• Wood. Wood.

• Cement fiber covering.

• Plaque of metal •

• System of rendering board

But when the exterior finish is installed on a border, it must be non-combustible and provide fire resistance for at least an hour to comply with building regulations.

Top Tips for the Extension of the Wood Frame

• Select an accomplished manufacturer with concept extensions for the wood frame

• Obtain three comprehensive quotes and go through them to make sure that you     compare them on a similar basis

• There is still an immediate budget of around 10% for unexpected situations

• Do not ignore the cost of external projects such as paving, decking and landscaping

Movement distance factoring

Where every addition is added to the current building (regardless of the construction method), it is extremely necessary to make sure a movement distance suits the shrinkage, thermal and humidity movement.

The expansion would most certainly be a different building from the current building and will thus expand/contract at a different pace than the existing building.

Moving joints are usually created with a stainless steel channel tie-system that offers lateral restraint, but which permits both horizontal and vertical movement, and a flexible sealant (different colors available) fills the gap between the two structures to make them weather resistant.