Do you need footings for a timber frame extension? Generally though, you will need concrete pads to support the timber frame and a strip footing to support the masonry infill panels or the below ground masonry and timber walls that sit on top of them (depending upon your design). Click to see full answer.
Full Answer
Can a timber frame extension be made on site?
A timber frame extension can be constructed on site using softwood and sheet panel systems. Panels can also be made off site in a factory or workshop, making assembly on site very rapid, allowing the shell of an extension to be made weathertight in days.
What footings do I need to build a timber frame house?
Generally though, you will need concrete pads to support the timber frame and a strip footing to support the masonry infill panels or the below ground masonry and timber walls that sit on top of them (depending upon your design).
What size footings do I need for a single storey extension?
Secondly, what size footings do I need for a single storey extension? For a single storey building strip foundations will typically be 450mm wide and at least 200mm deep, and for two storeys 600mm wide and 200mm deep.
How thick is the base of a timber extension?
The extension is built entirley of a light wood timber, it has been placed on to a concrete base which is 18 inches thick.. The builder who is helping us and is a friend of ours, has gone and had a row with the building inspector.
What are the factors that determine the type of foundation?
The type of foundation used is dependent on three main factors – ground type, size of the structure and materials used . Different types of subsoil have differing weight bearing tolerances and this must be taken into account to ensure a safe, stable structure. The size of the structure itself will dictate the stresses it places on ...
Why are concrete slabs reinforced?
The concrete slabs are reinforced with steel for added strength and to prevent cracking under stress. They can also be cast with thickened areas where additional support is needed. Foundations of this type should be designed by a structural engineer to suit the specifics of the job.
Why are saddle stones tapered?
Saddle stones are usually tapered as the broader base distributes weight more effectively. They are sometimes straight edged if they are to be placed next to an existing structure, for example as the support for a garage door.
What is a shallow foundation?
Shallow foundations are typically used where the loads imposed by the structure are relatively low compared to the bearing capacity of the soil beneath.
What is timber frame extension?
A timber frame extension is an impactful way to increase your home's space and add value to your property. This type of extension is often quicker and easier to build than blockwork projects and is a great option if you're building on a budget. ( MORE : Need a quote for your extension?)
What type of timber is used in Nimtim?
Nimtim Architects used structural timber and ply to limit the need for concrete and steel in this extension to a 1970s property in Lewisham, which is nominated for a DMI Award for 2021. (Image credit: Megan Taylor)
Is it better to build a timber frame extension or a timber frame extension?
There are many benefits to building a timber frame extension, and not just the extra space and added value that it gives to your home. With a timber frame extension, you can achieve the weathertight stage in days rather than weeks, which not only means less time spent on site, but also less dependence on good weather conditions ...
Why do you need a timber frame extension?
During construction, a timber frame extension allows you to achieve the weathertight stage in a matter of days rather than weeks, which means the builders will not only spend less time ...
Why is it important to have a movement joint when attaching an extension?
No matter which construction method is used, when an extension is attached to an existing building it's vital that a movement joint is formed to help accommodate any shrinkage, thermal and moisture movement.
What is a stick build?
Most extensions that are built using timber frame are 'stick build', which means timber frame panels are made up on site by the professional joiners as opposed to being manufactured in a factory environment. A structural engineer would carefully design the timber frame and prepare a specification of the size and grade of timbers to be used for ...
1. Do you need planning permission for timber framed extensions?
The use of timber as a construction material in itself does not affect the need for planning permission. All timber used for oak framed buildings will have the load bearing capacity and fire resistance required by law for construction.
2. What size extension can I build without planning permission?
The proposed ground area covered by your extension will affect whether you will need to apply for planning permission. No more than half of the total area of the property (excluding the original house) should be occupied by extensions or other buildings.
3. How big can I make my extension?
In addition to ground area, the height of your extension should also be considered if you wish to avoid a planning permission application. Without planning permission, side extensions can only be one storey high and no more than four metres in height. Within two metres of the property boundary, the eaves must be no higher than three metres.
4. How close to my boundary can I build an extension?
Known as the ‘boundary of the curtilage’, this is the edge of the enclosed space around the original house. For example, a wall hedge or fence surrounding the house and dividing it from other properties is the boundary. It is worth noting that this is not a legal definition and the Local Planning Authority may define the legal boundary differently.
5. Can you double the size of your house with an extension?
While this is physically possible, it will be impossible without planning permission. The rules cited above outline what is known as ‘permitted development’ for extensions without planning permission. Doubling the size of your house would far exceed these rights and a planning application would need to be made.
6. What happens if you build without planning permission in the UK?
Even if your extension plans fall within permitted development, it is possible that details will have to be changed during construction. This can cause what is known as a planning breach and whether deliberate or not can have serious repercussions.
