Introduction: Build a Garden Room
We had an unused corner of the garden where the old play area, which my children had grown out of, was.
I researched Garden Rooms and decided to build one myself.
See my Pinterest board here for more ideas;
I had some lengths of timber left over from a previous roofing project
It took a few weekends to build, here is how I did it...
4" Foam insulation under the floor
Assorted 3x2 and 6x2 pine timber for the frame - already owned
Plywood for the roof and floor
Western Red Cedar Cladding for front facing walls
Box Profile Polyester Coated Steel Sheet 0.5mm Thick for the rear facing walls
4 Oak framed double glazed doors - secondhand off Ebay
Rubber Sheet Kit for roof
Rough sawn old pine boards for internal cladding - already owned
Fibreglass Loft insulation for insulation in the walls and ceiling
Black Plastic Decking for the step
Assorted electrical sockets, switches, down lights and wire
Step 1: Step 1 : Prepare the Plot
The plot was cleared and levelled with sand.
I used old decking to frame the sand.
The shape of the room was determined by the fence, lawn and a large tree.
The sand was tamped down by foot to compress it.
I then laid 4" Building Foam Insulation on the sand.
This was then covered in 5mm plywood to protect it.
This method of construction has low enviromental impact as no digging or concrete is used.
Step 2: Step 2: Build the Frame
I built the wall frames on the ground using 3"x2" timber and wood screws.
They were then lifted up to the vertical and fastened together
I added a thicker beam over the doorway to take the roof beams
The 6"x2" roof beams were added, I ensured that there was a slight slope backwards to drain surface water
You can see a difference in height between photo 3 and 4, I decided that the room looked too high with the roof beams on top of the doorway beam, so I moved them to hang behind the beam on joist hangers
The grey sheet in the last photo is just a temporary tarpaulin
Step 3: Step 3: Fit the Doors
I bought the doors off Ebay, they were new and still boxed but not ideal as they were replacement doors for a bifold system that I did not have the track or frame for.
I bought a bottom running door track, most bifold tracks are top hung.
I had to make the frame and fit the track system to the doors. This was the trickiest part of the build and could be simplified if you bought a door set with frame and track included.
The design was made more complex as I decided to add interest by having one of the doors as a fixed pane around the side and a solid panel to the left of the doors.
I also wrapped the frame in a breathable membrane cloth that I had.
Step 4: Step 4: Clad the Frame
Western Red Cedar Cladding was fixed to the front facing walls with stainless steel wood screws hidden in the tongues. The cladding needs to reach the roof at the top and go down past the foam at the bottom but not touch the soil
Box Profile Polyester Coated Steel Sheet 0.5mm Thick was screwed on the rear facing walls with 38mm Wood Tec screws. These screws drill their own hole in the steel and then screw into the wooden frame. I used the driver shown in a battery drill to put them in. This is low maintainence and cheaper than the cedar but not as attractive.
Step 5: Step 5: Cover the Roof With Rubber Sheeting and Coat the Wood
I purchased a rubber flat roof kit which included a single rubber sheet, adhesive and trim and nails.
The rubber sheet is glued down to the plywood roof, it is then trimmed to size and the edge capping is nailed on.
I coated the cedar siding with Osma UV Protection Oil (Clear Satin) and the Oak Door Frames with Sadolin One Coat High Performance Wood Stain (Natural) to prevent water and UV damage.
The room was now waterproof
Step 6: Step 6: Adding the Decking Step
The decking step serves two purposes, it aids entry and exit but also covers the area below the windows.
I made up a frame using 4"x2" and secured black plastic decking to it, to match the black trim on the roof.
I also added an outside light.
We started using the room at this point,even though the inside was not fitted out.
Step 7: Step 7: Interior Fit Out
First I added laminate flooring
I then added fibrglass loft insulation into the walls and ceiling voids
I then clad the walls and ceiling with the rough sawn timber.
This wood was actually the flooring in the loft of our house, which I removed when I added thicker insulation and plywood loft flooring on stilts. The wood needed jet washing to remove the dirt and grime.
I fastened it on the walls in a diagonal fashion, partly for aesthetics but also to brace the rectangular frames.
I added a fuse box and lighting and power circuits
For lighting I inserted downlights into the ceiling as the ceiling is low
Step 8: Conclusion
We are very happy with the Garden Room
It was originally intended to be a Man Cave but has become the Family Gym!
We keep the exercise equipment in there and I have put a CD player and flat screen DVD player on the wall for aerobic sessions.
For relatively little cost we have turned an unused corner of the garden into a useful space that is regularly used by all members of the family.