Garden Structure/Greenhouse Base – How to do it yourself DIY

2016-04-16 14.53.26
Greenhouse Base

Greenhouse Base

Every good structure is preceded by a good solid base or foundation. When it came to choosing a material to use as the greenhouse base, it was obvious that paving slabs would be the best choice. Due to the location and nature of the build, paving slabs will be the quickest and most convenient method for us to use, while still providing us with a semi permanent solid foundation. If I had been building the greenhouse on my own land I would bed the slabs on concrete, but as I will be growing vegetables within the vicinity, and because I may want to move the greenhouse in the future (were only on our second full season), I decided to lay the slabs on a bed of quarry dust. When laid correctly, leveled and maintained, a well pointed paving slab area will provide a strong and weather proof base for many garden structures including shed bases, greenhouses bases or just a seating area.

Before I tell you how I laid the slabs there is a few important safety shout outs I must give.

First and foremost paving slabs are very heavy. Anything above a 2′ x 2′ paving slab is a 2 man lift. Gloves and steel toe cap boots are essential and if you need to cut the slabs, then you will need eye protection, ear defenders and a dust mask. When it comes to cutting slabs, the only viable method is to use an angle grinder/ Stihl saw with a concrete cutting or diamond tipped blade. If you are not confident or 100% competent, using either of these tools then you are better leaving it to someone who is. These are very dangerous tools if used incorrectly or in the wrong hands.

Tools you will need for the job.

  • Spade – for digging down to level the ground, also helpful to open the bags and spread the quarry dust.
  • Rubber Mallet – This is good for compressing the slabs into the bed of dust and to level off corners without damaging the face of the slab.
  • Spirit Level – This is essential to level off the dust to get a consistent level plane, to lay the slabs on. It is also a good tool to drag the dust back, and to use as a tamper to even out the dust.

When it comes to leveling the dust off, I use the edge of a large spirit level and level each side first to a desired height. This means that as long as either side is level, I just need to keep the dust up and flush with the bottom of the spirit level. 2016-04-16 11.38.42

Its important to remember when laying a slab beside another slab, not to get your finger trapped between both edges. When the slabs are laid firmly on the dust you should be able to walk on them, without the slabs rocking back and forth. If you need to open or adjust the spacing’s simply stand on the slab you don’t want to move and use a spade to lever the opposite slab into position.

greenhouse base
Level Greenhouse Base
Greenhouse Base
Laying dust level to set the greenhouse base slabs onto

I am still trying to decide what I am going to do about the spacing’s. The obvious option is to use concrete and point them, but im trying my best to refrain from using any concrete products on my plot. If you have any suggestions of what I should use, please send me an email or contact us on Facebook.

Mid April Update

Mid April 2016 Updateseedlings collage

Whilst being a firm believer in “A little rain never hurt anyone” there are some jobs that are impossible or just plain, too dangerous to do in wet conditions. It has not stopped raining in Belfast for nearly 2 full weeks now, and our plot is very muddy and slippery underfoot, in some areas. Both of our water butts are full to the brim. We are planning to put some wood-chip bark down to help with this, and also to help suppress the weeds and grass between our raised beds.

I am also in the process of erecting a new greenhouse and want to build a good solid and level base for the structure. The greenhouse will be sitting on a slope, so I will dig out and drop the back end before laying a weed-proof membrane. I will then level the ground and lay flag stones on a level bed of quarry dust, and point the joints by brushing in a concrete and sand mix. I will walk you through this when I finally get a dry day to do the work, its planned for this weekend.

2016-04-05 17.13.21
Potato Drills

I finally decided that the ground has warmed enough, due to the first signs of the upcoming war every gardener starts to face this time of year, and your clean worked ground starts to fill up with countless variety’s of weeds. Having managed to get a couple of dry hours one evening after work, we dug drills for the spuds lined with some well rotted manure, and laid the potatoes out to their correct spacing’s. See our potato blog. Potato

We are also busy looking after our many variety’s of seedlings, growing in their various containers. Due to the dull, overcast days, some of the seedlings had started to get a bit leggy so I was making sure to bury them as deep as I could when I was transplanting them to larger pots. I’ve been growing my seedlings in a few different ways this year, mainly because the greenhouse is not yet ready. My main light source in my flat, is an easterly facing bay window, while not ideal, it is still able to produce strong seedlings when blessed with good weather. To give the seedlings every advantage that I could, I purchased a small mini 4 tier greenhouse that I planned to keep my seedling in. I raised the mini greenhouse to the height of the window to maximize light exposure, and place all my pots and sets in watered trays to keep the seeds well watered. On warm days you can see the condensation on the inside and the seedlings seem to be doing very well. Temperature differences to come when new thermometer arrives. I also purchased a small heated propagator, for the particularly heat loving seeds, mainly peppers and chilies. Both seedlings planted on the same date, in both the heated propagator and the mini greenhouse seem to be growing very evenly so we will see when it comes to looking at their roots.

2016-04-07 20.29.29

Fingers crossed that the weather turns soon, and we can get a couple of good full days working hard, to get the now overdue greenhouse up, and get it working for us.