The Guardian of the Design Details
OAK FRAME DESIGNER
Part of my job as an oak frame garage designer is to look after the standard details. We have a lot of them; we try and cover every scenario we may find on one of our buildings. As a client you will be issued a set of details relating to the type of building you are having.
There are two types of building we do here in OCB, one being non-habitable and the other habitable.
Non-habitable buildings tend to be your single storey garages, carports and the like.
An example of a non-habitable detail is where we position the studwork and weatherboarding in relation to the main oak structure. The detail below shows the position of these between the posts so the oak is visible both internally and externally. To make the building weather tight we run slashes up the posts and tie beams to sandwich DPC between the studs and weatherboard.
Non – Habitable Vertical Detail
Habitable we are looking at garden barns and room over garages. Quite often we are asked to prepare the upper gables of a double story garage ready for the client to put in insulation.
Habitable Room Over Building
GARAGES WITH ACCOMODATION AND HOME OFFICES
As a designer I am seeing more of the habitable type buildings coming into my care. As we see the climate we live and work in change over the years, especially since the financial downturn, people are working more at home, building home offices or annexes over garages for the family to live in until things pick up. We have catered for these social changes in terms of what we offer in design to suit the way that people live. You may get a 3 bay garage where one bay is turned into a living area with internal stairs that lead up to the main living quarters complete with bathroom, bedroom and kitchen.
For a building to be habitable you have to seal the skin of it and wrap it up to protect it from the elements (and we have plenty of that in this country). For our buildings we create a barrier on the external, pushing the studwork to the external face of the oak, with a layer of OSB, breather membrane then studs and weatherboard.
THE OAK OUTBUILDING STRUCTURE
By doing this we hide the oak, so it will only be seen on the internal. But this is no different if you were to have a post and beam house. Where you would normally see the oak posts, a capping piece of dried oak is used on the external for the weatherboard to run up to and give the illusion the main oak structure is visible externally. Internally the client can then insulate and plasterboard leaving enough of the oak to be seen. This gives you a weather tight envelope around the building.
Habitable Vertical Detail
External Capping Pieces
Due to the section size we use (175 square) if we were to pull all the studwork and weatherboard between the posts, the oak will be covered internally by plasterboard. Of course this is down to the individual client as to what they would prefer.
As with any type of construction, details change as and when we design different buildings. It is something we work hard to keep up to date, with regular site visits to discuss different options with our site crews. So my work as guardian of the design details will never be over as the next job that will come in may offer a new challenge to overcome.