Robinsons Extensions 6ft, Assembly Instructions Manual

3 

EXTERNAL DIMENSIONS (mm) 

Model sizes listed are nominal.  

i.e.: an 8 x 10 is the model 8'6" x 10' 8" 

MODEL 

A 

(mm) WIDTH  

B 

(mm) LENGTH 

C 

(mm) DIAGONAL 

5 x 4 

REGATTA 

1662 

1392 

2168 

5 x 6 

2012 

2610 

5 x 8 

2632 

3113 

5 x 10 

3252 

3652 

5 x 12 

3872 

4214 

5 x 6 Lean to 

5’ LEAN-TO 

1619 

2012 

2583 

5 x 8 Lean to 

2632 

3090 

5 x 10 Lean to 

3252 

3633 

5 x 12 Lean to 

3872 

4197 

6 x 6 

REGENT 

1964   

2012 

2812 

6 x 8 

2632 

3284 

6 x 10 

3252 

3799 

6 x 12 

3872 

4342 

6 x 6 Lean to 

6’ LEAN-TO 

1929 

2012 

2787 

6 x 8 Lean to 

2632 

3263 

6 x 10 Lean to 

3252 

3781 

6 x 12 Lean to 

3872 

4326 

8 x 6 

ROYALE 

2584 

2012 

3275 

8 x 8 

2632 

3688 

8 x 10 

3252 

4154 

8 x 12 

3872 

4655 

8 x 6 Lean to 

2012 

3265 

8 x 8 Lean to 

2632 

3680 

8 x 10 Lean to 

3252 

4146 

8 x 12 Lean to 

3872 

4648 

10 x 8 

ROSETTE 

3208 

2632 

4150 

10 x 10 

3252 

4568 

10 x 12 

3872 

5028 

12 x 8 

REGAL 

3824 

2632 

4642 

12 x 10 

3252 

5020 

12 x 12 

3872 

5442 

14 x 8 

RENOWN

4454 

2632 

5902 

14 x 10 

3252 

5174 

14 x 12 

3872 

5515 

6ft ext. 

- 

1860 

- 

8ft ext. 

- 

2480 

- 

8’ LEAN-TO 

2572 

PLEASE CONTACT US  FOR A BASE PLAN FOR ANY MODIFICATIONS  

i.e. Drop door/s, dwarf wall, partition, etc…)  NOT LISTED ON THIS PAGE.  

MPORTANT:  IF YOU HAVE ANYTHING OVERHANGING THE RIDGE ON  

A LEAN-TO, PLEASE ALLOW HEIGHT CLEARANCE FOR THE ROOF VENT. 

THE FOLLOWING DIMENSIONS ARE THE EXACT EXTERNAL BASE DIMENSIONS FOR THE ROBINSONS RANGE.   

We cannot emphasis how important it  is to have a proper base for your Robinsons Greenhouse to be erected upon. 

It is essential that the 

BASE IS FLAT, LEVEL AND SQUARE AS WELL AS BEING SUBSTANTIAL 

enough to take the 

weight of the greenhouse including its 4mm glass.

IMPORTANT

:  Do not anchor your greenhouse down until it is fully assembled including glazing unless you are 100% sure your base is 

square and level.  If not your glass will not fit properly. 

THE BASE MUST BE FLAT, LEVEL AND SQUARE. 

ROBINSONS  

BASE PLANS 

Note, 

when calculating the length of a unit that has an 

extension you must add the main module dimension to 
give you the overall length.  See diagram below. 

Note,

 for lean-to models less a gable end deduct 67mm 

from the length. 

length 

width 

EXAMPLE (mm) 

External dimension of an 8' x 20' greenhouse. 
8 ' x 12' main module  2584  x 3872   
+ 8' extension   

2480 

 
Overall size 

2584  x 6352 

A brick perimeter base is equally suitable providing there 
is a concrete foundation beneath it.  We suggest using a 
solid brick with no frogs or holes (quality stock bricks or 
semi-engineering bricks).  A brick plinth is an advantage 
because it minimises the chances of any water running 
back underneath the base cill. 

Give yourself enough room around your base to allow for 
fitting the glass and any on-going maintenance /  clean-
ing.  A slab base which is larger than the greenhouse is 
the ideal solution.