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Rowlinson 9′ x 18′ Double Door Tongue and Groove Apex Workshop

First Added - February 27 2022
Last Updated - August 4 2022 - 15 Data Points Updated - 3 Data Points Added
Reviewed & curated by a panel of garden building experts. Using methodology 1.1

Product ID: SKU: BUNDLE-SWS9X182T

Size: 9' x 18'

Merchants Checked: 12

Available From: 3

Mano Mano
£2,188.13
See Deal
B&Q
£1,970.00
See Deal
Sheds.co.uk
£1,989.00
See Deal

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

75
Good Ranked in the Top 42% of Sheds.
Position 2245 of 5459 Sheds - Down 1,010 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 Rowlinson 9′ x 18′ Double Door Tongue and Groove Apex Workshop

The Rowlinson 9′ x 18′ Double Door Tongue and Groove Apex Workshop comes with an apex style roof, holds a 10 Years guarantee, fit with double doors, is treated using a dip treated process [1], and makes use of certified sustainable materials. The 14 windows used on this particular 9′ x 18′ use a styrene [2] glazing material (Thickness was not specified).

Our experts say this has 4 stand out features. 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 shiplap tongue & groove cladding used on this shed is one the best available for sheds rated by our experts.

2. A 12mm thick cladding like the one used on walls of this shed is one of the best rated by our experts.

3. The mineral felt roof covering found on this shed is rated to be one of the best by our experts.

4. Our experts say this the tongue & groove floor material used here is one of the best available on all sheds.

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

Cladding

Fantastic, our experts say most of the cladding options used are among the best.

The shiplap tongue & groove cladding(walls) used here is one of the best forms of construction for shed walls out of the 2 types [3] we’ve identified on same-size sheds, that you’ll also see getting used on 31% (1,373 of 4,360) of all sheds analysed [4], as well as being used on 42% (185 of 436) of the top 10% of sheds [5]. Even though the Expert Score of this particular shed is 11 points below that of the average shiplap tongue & groove clad 9′ x 18’s (they have an average Expert Score of 86), with it being on 42% of the top 10%, its use here is a reassuring sign of a high quality cladding. You’ll also find the shiplap tongue & groove cladding showing up on 48% of 9′ x 18′ sheds (78 in total) [6].

The walls are 12mm thick and we rate this the best thickness out of the 4 found on same-size sheds [7]. It is used on 54% of all sheds [8] and is also used across 58% of the top 10% of sheds [9] we analysed. Even though the Expert Score of this particular shed is 13 points below the average 12mm clad 9′ x 18’s score of 88, the fact that 58% of the top 10% use a cladding this thick is reassuring as a sign of quality. 57% of 9′ x 18′ sheds (93 in total) use 12mm thick walls [10].

Read full analysis for cladding.

Roofing

Osb is the of construction method used for the roofing, our experts rate this one of the best forms of roof material out of the 2 types we’ve found on same-size sheds [11]. This roofing material is used on 18% of all sheds analysed, and 8% of the top 10% of sheds. While you’ll find that the Expert Score of this shed is 4 points lower than the average for 9′ x 18’s that use osb roof material (75 vs the average of 79), you can be sure it’s not due to the roofing as this one of the highest scoring materials found on 9′ x 18′ sheds. 3% of 9′ x 18′ sheds (5 in total) use osb construction for the roof.

Mineral felt is used as the roof covering. Our experts say it’s one of the best roof covering materials, and is also the only kind identified on same-size sheds [12]. It comes fitted on 22% of sheds and used on 49% of the top 10% of 9′ x 18′ sheds. Even though the Expert Score of this particular shed is below the average 9′ x 18’s cover their roofs with mineral felt (75 vs the average of 84), with it being on 49% of the top 10%, this should give you confidence in its quality. 15% of 9′ x 18′ sheds (24 in total) make use of a mineral felt material as a roof covering.

Read full analysis for roofing.

Flooring

The manufactures of this shed chose tongue & groove for the floor construction, we rate this the best form of floor construction out of 2 types found on same-size sheds [13]. This type of floor construction is used on 36% of all sheds we analysed, and 59% of the top 10% of those sheds. Even though the Expert Score of this particular shed is 12 points below the average of 87 for 9′ x 18’s using a tongue & groove flooring, with it being on 59% of the top 10%, you can be assured that this is a quality flooring material. 61% of 9′ x 18′ sheds (100 in total) use tongue & groove construction for the floor.

A 12mm thick floor boarding is used here, this is one of the best floor board thicknesses according to our experts out of 5 found on same-size sheds [14]. It’s found on 31% of all sheds and used on 54% of the top 10% of sheds. Even though the Expert Score of this particular shed is below the average 9′ x 18’s that use 12mm flooring (75 vs the average of 88), with it being on 54% of the top 10%, this should give you confidence in its quality. 50% of 9′ x 18′ sheds (82 in total) use 12mm thick floor boarding.

Read full analysis for flooring.

Window

Styrene windows come installed on this shed. As a glazing option, we rate it the worst out of the 2 glazing types found on 9′ x 18′ sheds [15]. This particular type of glazing is used on 6% of all windowed sheds and 1% of the top 10% of sheds with windows we analysed. 4% of 9′ x 18′ sheds with windows (4 in total) use styrene windows.

Read full analysis for window.

Height

The height of this shed is 2350mm (8′) which is 28% more than the average 9′ x 18′ shed, giving you 521.0mm (2′) extra headroom.

Read full analysis for height.

Doors

The door height is 1,723.00mm (6′) tall which is 4% or 75.67mm (0.2′) shorter than the average 9′ x 18′.
The door width is 1,628.00mm (5′) wide which is 10% or 142.26mm (0.5′) wider than the average 9′ x 18′.

Read full analysis for doors.

You Might Also Consider

We found 164 9′ x 18′ sheds with comparable specifications. The Rowlinson 9′ x 18′ Double Door Tongue and Groove Apex Workshop has an Expert Score that is 15% lower than average and is £147 less expensive than average. If you are looking for the best value or highest expert scoring sheds out of the 164 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 £1,841 with this Optional extra – Add top coat Workspace Shiplap 10′ x 15′ Dip Treated Shed Double Door with Three Opening Windows Top Coat. It is priced at £368, this is 500% less than this and has an Expert Score of 92, 17 points higher than the Rowlinson 9′ x 18′ Double Door Tongue and Groove Apex Workshop.

Highest Expert Score – With an Expert Score of 95 vs 75 for this product, the 17′ x 10’5 Palmako Jari Premium Multi-room Shed is the best 9′ x 18′ shed with comparable specifications, and is priced at £3,729, that’s £1,520 more than the Rowlinson 9′ x 18′ Double Door Tongue and Groove Apex Workshop.

High Wind Area – If you live in a particularly exposed or high wind area then having a shed with a thicker cladding and higher than average frame thickness can be preferable. We found at least 3 sheds that have a combination of features that can make them more suited to higher wind areas.
17′ x 10’5 Palmako Jari Premium Multi-room Shed
16′ x 10′ Shed Republic Ultimate heavy-duty Rev Apex Workshop Double Door
16′ x 10′ Shed Republic Ultimate heavy-duty Workshop Double Door

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 sheds that have a combination of features that can make them more suited to higher wind areas.
10′ x 15′ Lotus Anthracite Grey Double Door Metal Workshop
10′ x 15′ Lotus Anthracite Grey Double Door Metal Garage
20’x8′ Tiger Garden Studio Plus

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 sheds that have options that you might find a better fit if this is a concern you have.
10′ x 15′ Lotus Anthracite Grey Double Door Metal Workshop
17′ x 10’5 Palmako Jari Premium Multi-room Shed
10′ x 15′ Lotus Anthracite Grey Double Door Metal Garage

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.
Palmako Ly 3.3m x 4.5m Garden Room Garden House
16′ x 10′ Shed Republic Ultimate heavy-duty Workshop Double Door
16′ x 10′ Shed Republic Ultimate heavy-duty Rev Apex Workshop Double Door

Product Details

Building Type
Apex Sheds, Double Door Sheds, Garden Sheds, Large Shed Workshops, Large Sheds, Shed with Windows, Workshop Sheds
Metric Size (Meters)
9' x 18'
Roof Style
Apex
Number of Windows
14
Door Type
Double Door
Cladding Type
Shiplap Tongue & Groove
Cladding Thickness
12mm
Treatment Type
Dip Treated
Guarantee
10 Years
Height (Imperial)
2350mm
Height (Metric)
2350mm
Depth
5.59 m
Height
2.21 m
Width
2.9 cm
Roof Style
Apex
Window Size (Metric)
nan x nan
Floor Material
Tongue & Groove
Glazing Material
Styrene
Roof Covering
Mineral Felt
Floor Thickness (Imperial)
12mm
Floor Thickness (Metric)
12mm
Persons To Assemble
2 Persons Recommended
Door Height (Imperial)
1723mm
Door Height (Metric)
1723mm
Door Width (Imperial)
1628mm
Door Width (Metric)
1628mm
Roof Material
OSB
Internal Depth (Imperial)
17' 11"
Internal Depth (Metric)
547cm
Internal Width (Imperial)
8' 10"
Internal Width (Metric)
270cm
Accreditations
Certified Sustainable
Door Size (Imperial)
6' x 5'
Door Size (Metric)
1723mm x 1628mm

Comparisons of Similar Sheds

bms2500_01si-001-001-0013_01_1shelter-logic-peak-style-portable-storage-shed-1
Expert Score 7575757573
Price £269.99£303.00£254.99£189.00£294.00
Size 4' x 3'6' x 3'4' x 3'5' x 5'9' x 9'
Brand SuncastBillyOhMerciaShelter LogicShelter Logic
Material PlasticWoodenWoodenMetalMetal
Cladding Thickness 7mm
Guarantee 5 Years10 Years10 Years1 Years1 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.

B&Q – 78905 products checked, found 1 match.
ManoMano UK – 922302 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.
Wilko.com – 21232 products checked, found no matches.
Homebase – 35509 products checked, found no matches.
Buy Sheds Direct – 1635 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. Cladding types identified: shiplap tongue & groove, tongue & groove 

4. Global cladding data sourced from: All shiplap tongue & groove sheds 

5. Top cladding data sourced from: Top 436 shiplap tongue & groove sheds 

6. 9′ x 18′ cladding data sourced from: 164 9′ x 18′ shiplap tongue & groove sheds 

7. Cladding thickness types identified: 12mm, 72mm, 100mm 

8. Global cladding thickness data sourced from: All 12mm sheds 

9. Top cladding thickness data sourced from: Top 436 12mm sheds 

10. 9′ x 18′ cladding thickness data sourced from: 93 9′ x 18′ 12mm sheds 

11. Roof material types identified: osb, tongue & groove 

12. Roof covering types identified: mineral felt 

13. Floor material types identified: osb, tongue & groove 

14. Floor thickness types identified: 12mm, 16mm, 19mm 

15. Glazing material types identified: double glazed, styrene 

Product ID: SKU: BUNDLE-SWS9X182T

Size: 9' x 18'

Merchants Checked: 12

Available From: 3

Mano Mano
£2,188.13
See Deal
B&Q
£1,970.00
See Deal
Sheds.co.uk
£1,989.00
See Deal

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