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8’2 x 4’4 Mercia 84 Wooden Lean-To Greenhouse

First Added - February 27 2022
Last Updated - August 4 2022 - 21 Data Points Updated - 3 Data Points Added
Reviewed & curated by a panel of garden building experts. Using methodology 1.1

Product ID: SKU: SI-004-001-0005

Size: 8' x 4'

Merchants Checked: 12

Available From: 3

HomeBase
£770.00
See Deal
Sheds.co.uk
£629.00
See Deal
BuyShedsDirect
£652.99
See Deal

Support WhatShed: by making a purchase after clicking a link above, a portion of the sale supports this site.

85
Good Ranked in the Top 6% of Greenhouses.
Position 42 of 836 Greenhouses - Down 36 places from previous update.
Quality of materials
Construction quality
Ease of construction
Value for money

See how our panel of industry experts helped create the impartial judging criteria used to calculate the Expert Score.

Our verdict on the 8’2 x 4’4 Mercia 84 Wooden Lean-To Greenhouse

The 8’2 x 4’4 Mercia 84 Wooden Lean-To Greenhouse comes with an apex style roof; holds a 10 Years guarantee; is fit with lockable single doors that use a lock and key locking system; is treated using a dip treated process [1]; and makes use of made in the uk, certified sustainable materials. The windows window used on this particular 8′ x 4′ use a styrene [2] glazing material (Thickness was not specified).

Base material: wood

Certifications this product meets:

FSC certified timber[3]

Our experts say this has 1 stand out feature. A stand out feature is something found on over 70% of the top 10% of products in a particular category or is an exceptionally good feature as rated by our panel of experts.

1. The tongue & groove cladding used on this greenhouse is one the best available for greenhouses rated by our experts.

Below is a brief overview of how some of the key points of this greenhouse fairs across the market.

Cladding

The tongue & groove cladding(walls) used here is the best form of construction for greenhouse walls out of the 2 types [4] we’ve identified on same-size greenhouses, that you’ll also see getting used on 5% (40 of 787) of all greenhouses analysed [5], as well as being used on 12% (9 of 78) of the top 10% of greenhouses [6]. You’ll also find the tongue & groove cladding showing up on 14% of 8′ x 4′ greenhouses (4 in total) [7], and if we compare this item against those 4 we find it’s Expert Score is 10% higher than the average score for a 8′ x 4′ tongue & groove greenhouse.

Read full analysis for cladding.

Roofing

Styrene is the material used for the roofing, our experts rate this one of the worst forms of roof material out of the 2 types we’ve found on same-size greenhouses [8]. This roofing material is used on 1% of all greenhouses analysed, and 4% of the top 10% of greenhouses. 7% of 8′ x 4′ greenhouses (2 in total) use styrene construction for the roof, with this product having an Expert Score 11% higher than the average in this regard.

Styrene is used as the roof covering. Our experts say it’s an about average roof covering material, and is also the only kind identified on same-size greenhouses [9]. It comes fitted on 2% of greenhouses and used on 1% of the top 10% of 8′ x 4′ greenhouses. 17% of 8′ x 4′ greenhouses (5 in total) make use of a styrene material as a roof covering, with this product having an Expert Score of 16% higher than the average.

Read full analysis for roofing.

Window

Styrene windows come installed on this greenhouse. As a glazing option, we rate it the worst glazing types and is also the only type found on 8′ x 4′ greenhouses [10]. This particular type of glazing is used on 9% of all windowed greenhouses and 12% of the top 10% of greenhouses with windows we analysed. 28% of 8′ x 4′ greenhouses with windows (5 in total) use styrene windows, with this product having an Expert Score of 16% higher than the average.

Read full analysis for window.

Height

The height of this greenhouse is 2080mm (7′) which is 2% more than the average 8′ x 4′ greenhouse, giving you 40.0mm (0.1′) extra headroom.

Read full analysis for height.

Doors

The door height is 1,680.00mm (6′) tall which is 1% or 6.33mm (0.0′) taller than the average 8′ x 4′.
The door width is 600.00mm (2′) wide which is 6% or 36.00mm (0.1′) wider than the average 8′ x 4′.

Read full analysis for doors.

You Might Also Consider

We found 6 8′ x 4′ greenhouses with comparable specifications. The 8’2 x 4’4 Mercia 84 Wooden Lean-To Greenhouse has an Expert Score that is 13% higher than average and is £145 less expensive than average. If you are looking for the best value or highest expert scoring greenhouses out of the 6 with comparable specifications the following might be of interest.

Best value – If you are looking for something comparable that costs less, then you could save £123 with this 8′ x 4′ Mercia Traditional Wooden Lean To Greenhouse. It is priced at £530, this is 23% less than this and has an Expert Score of 67, 17 points less than the 8’2 x 4’4 Mercia 84 Wooden Lean-To Greenhouse.

The 8’2 x 4’4 Mercia 84 Wooden Lean-To Greenhouse is the best scoring greenhouse available out of all 6 8′ x 4′ greenhouses we analysed.

High Wind Area – If you live in a particularly exposed or high wind area then having a greenhouse with a thicker cladding and higher than average frame thickness can be preferable. We found at least 2 greenhouses that have a combination of features that can make them more suited to higher wind areas.
8′ x 4′ Mercia Traditional Wooden Lean To Greenhouse
Marlborough Greenhouses 4′ x 8′ Wooden Greenhouse with 4 windows

Coastal Consideration – If you live in a particularly wet or harsher environment such as by the coast then you might want to consider something with a more robust pressure treatment or something made from metal or plastic, both materials that are particularly suited to such harsh environments. We’ve found at least 3 greenhouses that have a combination of features that can make them more suited to higher wind areas.
8’x4′ Palram Canopia Hybrid Silver Lean To Wall Walk In Greenhouse
Shelter Logic 6′ x 8′ Peak Style Portable Greenhouse
Vitavia Ida 8 x 4ft Toughened Glass Greenhouse with Steel Base

Public-Facing – Extra security measures might be more of a concern if you’re placing your building in an area that is more public-facing than a garden. Features such as security windows or even having no windows at all, and the ability to lock all opening doors are usually much more important when you have something that is more public-facing. We found at least 3 greenhouses that have options that you might find a better fit if this is a concern you have.
8’x4′ Palram Canopia Hybrid Silver Lean To Wall Walk In Greenhouse
8’2 x 4’4 Mercia 84 Wooden Lean-To Greenhouse
8′ x 4′ Halls Cotswold Broadway 84 Silver Lean-To Greenhouse

More Child Friendly – If you have children and you are looking for something that has that little extra in terms of durability then tougher glazing options might be a better option. Here we have at least 3 other options that will fill those needs.
8’x4′ Palram Canopia Hybrid Silver Lean To Wall Walk In Greenhouse
8’2 x 4’4 Mercia 84 Wooden Lean-To Greenhouse
8′ x 4′ Halls Cotswold Broadway 84 Silver Lean-To Greenhouse

Product Details

Building Type
Greenhouses, Lean-To Greenhouses, Narrow Greenhouses, Wooden Greenhouses
Metric Size (Meters)
8' x 4'
Material
Wooden
Roof Style
Apex
Number of Windows
Has Windows
Door Type
Single Door
Cladding Type
Tongue & Groove
Treatment Type
Dip Treated
Guarantee
10 Years
Range
Mercia Greenhouse
Product Contains
Fixings, Instructions
Industry Standards Certification
FSC certified wood
Additional Information
Building is supplied in a factory applied dip treatment that requires further spirit based treatment once assembled and annually. The building is delivered flat packed in pre-assembled panels for home assembly
Additional Assembly Information
2 person assembly
Product Dimensions
8x4ft
Assembly Options
Self Assembly Required
Locking System
Lock and Key
Number Of Doors
1
Glazing Material
Styrene
Roof Covering
Styrene
Window Size (Metric)
nan x nan
Eaves Height (Imperial)
1830.0mm
Eaves Height (Metric)
1830.0mm
Persons To Assemble
2 people
Door Height (Imperial)
1680mm
Door Height (Metric)
1680mm
Door Width (Imperial)
600mm
Door Width (Metric)
600mm
Roof Material
Styrene
Internal Depth (Imperial)
7' 10"
Internal Depth (Metric)
239cm
Internal Width (Imperial)
4' 3"
Internal Width (Metric)
130cm
Height (Imperial)
2080mm
Height (Metric)
2080mm
Framing Size (Imperial)
1 3/4" x 1 1/8"
Framing Size (Metric)
44mmx28mm
Accreditations
Made in the UK, Certified Sustainable
Door Size (Imperial)
6' x 2'
Door Size (Metric)
1680mm x 600mm
Assembly Time (estimated)
2-4 hours
Construction Type
Tongue and Groove
External Depth (Imperial)
8'
External Depth (Metric)
2490.0mm
External Width (Imperial)
4'
External Width (Metric)
1320.0mm
Finish
Smooth
Recommended Construction Surface
Concrete or Paved Area (level)
Ridge Height (Imperial)
2070.0mm
Ridge Height (Metric)
2070.0mm

Comparisons of Similar Sheds

10-x-8-pressure-treated-tongue-and-groove-greenhouse-super-strength-framing-rim-lock-4mm-toughened-glass-bench-free-install-L-8776375-39581696_14-x-6-pressure-treated-tongue-and-groove-greenhouse-super-strength-framing-rim-lock-4mm-toughened-glass-bench-free-install-L-8776375-39581672_1si-004-003-0001-4si-001-005-0001_014-x-8-pressure-treated-tongue-and-groove-greenhouse-super-strength-framing-rim-lock-4mm-toughened-glass-bench-free-install-L-8776375-39581646_1
Expert Score 8085838585
Price £5,423.11£4,552.90£659.00£1,329.00£4,719.92
Size 10' x 8'4' x 6'6' x 3'8' x 8'4' x 8'
Brand Marlborough GreenhousesMarlborough GreenhousesAdleyMerciaMarlborough Greenhouses
Material WoodenWoodenWoodenWoodenWooden
Cladding Thickness 12mm12mm12mm12mm
Guarantee 10 Years10 Years10 Years10 Years10 Years
GoGoGoGoGo
Joel Bird

Joel Bird

Profile

Our resident shed building expert Joel was the 2014 winner of Channel 4’s Amazing Spaces Shed of the Year having beat over 10,000 applicants to win. He returned to the show the following year as a judge. He is also the author of The Book of Shed and has designed & built over 50 small bespoke garden builds. Joel has appeared on various TV or Radio shows include George Clarkes Amazing Spaces, Alan Titchmarsh Love your Garden, Chris Evans Breakfast Show and BBC Radio 4’s Saturday Live.

Meet the experts

Sources

Merchants Checked

12 different sources were used to research information on this product, and 3 contained information that we were able to use to compile the data used on this page.

The following merchants were checked on the 06 August, 2022 to see if they stocked this product.

Homebase – 35509 products checked, found 1 match.
Buy Sheds Direct – 1635 products checked, found 1 match.
sheds.co.uk – 1999 products checked, found 1 match.
Waltons – 231 products checked, found no matches.
Wickes – 19576 products checked, found no matches.
B&Q – 78905 products checked, found no matches.
ManoMano UK – 922302 products checked, found no matches.
Wilko.com – 21232 products checked, found no matches.
BillyOh – 1244 products checked, found no matches.
Garden Buildings Direct – 1284 products checked, found no matches.
Shedstore – 1373 products checked, found no matches.
Tiger Sheds – 635 products checked, found no matches.


1. Dip Treated: Dip treating is a temporary protective base coat treatment that is mainly designed to help protect the building during transit and for around one month after it is assembled. This water-based treatment is the least time-consuming and cheapest type of wood treatment. It involves dipping the wood in a protective water-based preservative and then leaving it to dry. The action of dipping is where ‘dip treatment’ comes from.

A dip-treated garden building is not considered fully treated with wood preservatives; it’s vital to re-treat your dip-treated building, preferably with a solvent-based (or oil-based) wood treatment. Then re-treat it on an annual basis using a solvent-based (or oil-based) wood treatment.

If you don’t want to treat something on an annual basis then a pressure treated wooden building might be a better option, this is where the wood undergoes a process called tanalisation (pressure treatment) during production. This is where the timber is submerged in specialist wood preservatives (such as Tanalith E, this is actually the origin of the word ‘tanalisation’), the wood then goes into a high pressure vacuum tank to draw out excess moisture and air and force in the preservatives. This deep penetration of the exterior wood protects it from the elements and all forms of insect attack. Wood treated this way can last many years without being re-treated. The Wood Protection Association has a good article/video on this. 

2. Styrene (Polystyrene (High Impact) HIPS): Styrene as it is commonly known or High Impact Polystyrene (HIPS) is a very versatile form of plastic. It has a very wide range of uses but for garden buildings styrene is typically used as a budget option for windows.

Styrene is a shatter-resistant material, which is why it is ideal for situations where safety needs to be considered, such as playhouses. This benefit can be offset by a few other drawbacks, unfortunately styrene has a tendency to yellow over time (the technical term is Photoyellowing and it is caused by prolonged exposure to UV Light), the degradation of its polymers over time also causes it to become more brittle.

Another drawback of styrene is its thermal coefficient of expansion (it is 80 x 10-6), this is higher than most other glazing options. This means that as the material heats up and cools it can contract and expand more than other glazing options. This cycle can lead to a loose fit of windows over time.

According to data from the British Plastics Fedaration the physical properties of Styrene (Polystyrene (High Impact) are that it is not very good when exposed to high heat with a maximum continuous use temperature of between 60 to 80 °C. This is coupled with the fairly low range the Notched Impact Strength data shows of 10.0 – 20.0 Kj/m². 

3. FSC Certified Timber: The Forest Stewardship Council (FSC) is an international organisation that is “dedicated to promoting responsible management of the world’s forests.” When you see the FSC certification it means the forest where this wood was sourced from is being managed in a way that preserves biological diversity, while ensuring it sustains economic viability. FSC-certified forests are managed to strict environmental, social and economic standards. FSC certified timber is comparable to Certified Timber

4. Cladding types identified: shiplap tongue & groove, tongue & groove 

5. Global cladding data sourced from: All tongue & groove greenhouses 

6. Top cladding data sourced from: Top 78 tongue & groove greenhouses 

7. 8′ x 4′ cladding data sourced from: 29 8′ x 4′ tongue & groove greenhouses 

8. Roof material types identified: styrene, tongue & groove 

9. Roof covering types identified: styrene 

10. Glazing material types identified: styrene 

Product ID: SKU: SI-004-001-0005

Size: 8' x 4'

Merchants Checked: 12

Available From: 3

HomeBase
£770.00
See Deal
Sheds.co.uk
£629.00
See Deal
BuyShedsDirect
£652.99
See Deal

Support WhatShed: by making a purchase after clicking a link above, a portion of the sale supports this site.