Creating a Roof for Your Oak SolidLox Garage, Carport and Other Buildings

Oak Frame Roof Design The SolidLox solid timber system is suitable for all types of roof plans and designs – even the most architecturally challenging  - AND is offered with pre-selected easy fix roof coverings, full details of which are available on our Roofing Options page.

Roof Types

Flat Roof Plans

Designs with ‘flat’ roofs are generally not exactly flat. Instead they have a slight fall, or slope, built in to shed water from rain and snow off. Usually this is into a gutter and downpipe system on one side or end, but you can design with a wide roof overhang that will shed the water away from the walls of your building without the need for this. Common covering for such roofs have been covered with corrugated Perspex sheets, EPDM (synthetic rubber sheeting), and hot felt roofing.

Oak Frame Roof Low Pitch Design

Low Pitch Roofs

Designs with low pitch roofs are often selected to keep the ridge height of the building down to take advantage of planning exemptions. Generally these are between 17.5° and 25° pitch, but tiles and other coverings are available to go lower than this if required.

Medium Pitch Roof Designs

Medium pitch roof designs – those with roof plans between 26° and 35°– are generally used for aesthetic reasons, e.g. to tie in with surrounding properties. Again a range of easy fix roof coverings has been selected to suit these requirements, including recyclable slate, metro-tile, cedar shingle, asphalt shingles, etc.

Oak Frame Roof High Pitch Design

Designs with High Pitch Roofs

Planning a high pitch roof – say between 36° and 45° – may again be used for aesthetic reasons. However, such a plan can also accommodate occasional storage and even environmental requirements, like bat roosts.

As a general rule such designs do not have ceilings or floors included, the roof planes (sides) being tied together by ‘collars’ – cross timbers between alternate pairs of rafters at high level.

However, they are suitable for adding extra bearers and even small platforms for storage of small occasional items, timber, ladders, etc.

Plans with High Pitch Roofs

45° degree and higher pitch roofs are primarily for solid oak and other high end timber garages and car ports with rooms-in-the-roof. Very steep pitches, e.g. greater than around 55°, can appear disproportionate and become difficult and dangerous to work on.

Oak Frame Roof Mansard Design

Mansard Roofs

Gambrel and Mansard Roofs can give a very pleasing ‘barn like’ appearance, as well as creating more room in the roof floor space with higher ceiling levels. Side pitches of 65° and over may be suitable with top roofs of 15° to 25° being complimentary.

Roof Shape Design

With the exception of flat roofs, all of the above roofs can be hipped, gable ended, barn ended, or a mixture of all of these.

Hip, Gable, Shed, Salt Box, Gambrel Roof Shapes Gull Wing, Barn End, Mansard, Dormers, Skylights Roof Shapes

Room-in-the-Roof Plans for Your Green Oak Structure

Garage Room in the RoofThe SolidLox system has been pre-engineered to take domestic loads of buildings with rooms in the roof up to 6m from front to back.

This includes normal roof loads and rooms inside the space, as well as snow loads and wind loads for most areas in England, Wales and lowland Scotland, although your design will be checked against you location in case any adjustments are required.

Space inside the roof is restricted by the pitch (angle of slope) of the roof.

A useful ‘rule of thumb’ guide for this is that with a 45 degree pitch roof for every 1m you want to achieve in side wall height, you will need to move the wall in from the eaves edge by 1m.

For domestic use a ‘knee wall’ (side wall) height of around 900mm is generally acceptable, but walls down to 500mm provide a useful extra amount of floor space.

So, if you have a 5m deep (front to back) garage with gable walls along the sides (the same direction), if you want a 900mm knee wall, you will have to move the floor space in from the eaves by 1.8m (900mm front and back)., leaving you with a front to back floor of 3.2m (just over 10’ 6”). This would give a usable floor area of circa 17.5m2 (188 sq. ft.).

For the same ground footprint but with the gables facing the front and rear, if the overall width is 6.3m (two 3m openings with a 150mm post in between) then you would get 4,5m (around 15 ft.) and a usable floor area of 22.5m (242 sq. ft.) – almost 40% more floor space..

How you design your room in the roof this will depend on how you intend to use it as well as surroundings, like trees and overhead cables, as well as proximity to other buildings.

Whatever you choose to design, you can be sure that your SolidLox solution will complement and enhance your existing property.

Roof Lights, Dormers and Windows

If the plans, elevations and other design elements of your green oak or other solid timber garage or car port needs roof lights, dormers or windows, you’ll be pleased to know that SolidLox has already thought about how to make it easy for you to incorporate them.

Plans with Roof Lights

Garage Roof lights Garage Roof lights Garage Roof lightsSolidLox has thought about these too. Rafters are set at 600 centres, leaving you 550mm space between them to simply drop single roof lights in between them. You can make these as long or short as you like.

SolidLox kits offer standard size roof lights.

If you want wider or more complex roof lights, e.g. cabriole ‘balcony’ style, then these are likely to require rafters removing and the roof structure re-engineering.

In such cases its best to talk to us about your plans and other ideas first, before going too far.

Designing Roofs with Dormers

Garage Roof lights

Again, SolidLox has thought about the easiest way for you to include roof dormers with windows in your design.

By simply cutting across one rafter you can create an 1150mm gap between side rafters. Dormer cheeks then fit on top of the side rafters and allow you to create either gable end bonnet dormers, or hip ended dormers.

Choosing Your Windows & Doors

Garage Roof lightsGarage Roof lights

Like many other building components, a vast array of windows and doors is available for you in the market. The difficulty is knowing what to choose to complement your overall green oak or other timber building design.

Your SolidLox modular system uses 900mm wide openings as standard for doors and windows. This enables disability wheelchair access though door openings and facilitates fire escape windows to be fitted.

Doors openings are set at 2m high and window opening 1m high.

While window style is a personal choice, a budget selection of uPVC window options is offered together with vertical boarded ledged and braced personnel doors and garage doors with timber frames. SolidLox will be pleased to assist customers who are ordering kits with alternative selections in timber and modified timber.

Designing Stairs for Rooms in the Roof

Garage Roof lightsGarage Roof lightsGarage Roof lights

Creating the designs, plans, elevations and sections for any building can be quite architecturally challenging. This is not only because the stairs need to meet building regulation requirements, but also because the stairs have to be adapted to suit the height between floors. The design and plans for the building also have to be arranged so as to allow sufficient ‘head clearance’ height for people to walk up and down them.

It is not uncommon for even well experienced builders and architects to encounter difficulties when trying to get the stirs – often installed during the later stages of construction – to ‘fit’.

Once again the SolidLox Post & Beam Building System makes designing in the stairs much simpler and easier. This is because by working with predetermined size modules for posts and beams (even though these can be different for each project), the exact heights and plan dimensions are fixed. Consequently the stairs, which are almost always made in a joiners workshop off-site, can be made to precise measurements knowing that they will, indeed, ‘fit.

However, whether you are an architect, builder, or self-builder, if you are designing plans for a relatively small area, as with a garage or car port, you will need to be careful about how the floor areas on both ground and first floor levels are to be used.

SolidLox offers a number of different types of staircase to help you to do this. ‘Space-Saver’ stairs are very steep, rather like those used on boats and ships. They are ideal for very tight spaces and where not much has to be taken up and down them, or they are not being accessed all that frequently. ‘Quarter Landing’ stairs can be fitted into corners to give best use of available floor space and head height. “Balcony Stairs” are designed to be sited on the outside of the building with an independently supported ‘balcony landing’ platform.

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