Oak Porch Design

Oak Porch Design

You have a number of areas to consider.  Below are the options and terminology that are available.

A Helpful Drawing?


Oak Truss Design

All oak porches have a design that incorporates a truss.  This is the triangular structure directly above the legs. Depending on the style of roof, it means that the truss will be a full triangle on the face of the porch or a half triangle on the side of the porch.

Click the image to the right to expand.

The internal design of the truss can incorporate straight uprights, diagonal struts or curved members.

Your main existing roof lines may want to match the pitch of the truss.  When full working drawings are created this can be confirmed.

oak porch truss


As with all structures, there need to be 3 main dimensions; the width, depth and height.

The width and depth of your oak porch are also known as the footprint.  On new builds, this area can be predetermined and set up out accordingly.  On existing properties, there may be restrictions, for example, side windows, outside lights or groundwork makeup.

The height of the oak porch is determined by its width, height of legs and pitch of the roof.  These calculations, therefore, decide where the ridge of the oak porch will be.  Care should be taken so that if the first floor has a window directly above the exterior door, it can be avoided.

At this stage, you don’t need to calculate any angles as full support is given to help you create a work of art!

Under Boarding

Your oak porch roof can be left showing the roofing felt or be decorated with oak boards.

Imagine yourself stood underneath the porch.  When looking upwards, what would you like to see?

Tongue and grooved, oak boarding measuring 165mm x 15mm give a planked appearance.

oak porch

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Oak porch on Dwarf Wall in Yorkshire

Dwarf Wall Required?

Not always a requirement although this will add another characteristic to the design.

It would allow for internal storage and therefore seating if needed. Thought should be given to possible foundation requirements because of the weight involved.

A more enclosed feel can be obtained due to the wall being ‘L’ shaped.  Either way, your oak posts will sit on the wall and have a stainless steel pin to slightly elevate it keeping water ingress to a minimum.

Upright Posts

2 or 4 posts is the main question.

A traditional oak porch can have 4 main upright posts, 2 at the front and 2 at the back.  Should only 2 front posts be required, the oak beams returning back the wall would need to be extended.   These would sit into the brickwork or stonework of the house whilst supporting the roof.