BillyOh Tessa Tongue and Groove Reverse Apex Summerhouse

This fantastic tall Tessa Reverse Apex Summerhouse has a stunning, modern design that is guaranteed to add style to your garden and enhance your outdoor experience. The breath-taking long windows, multi-access doors and strong Tongue and Groove construction make this summerhouse stand out from the crowd and an excellent addition for any garden.

1. Select Size

Size measured in feet

2. Select Treatment

Spray Treated

Treated with a beautiful golden brown spray treatment which colours and protects during transit. Designed to last through shipping and assembly, we do recommend treating the wood after installation to protect it.

Pressure Treated

For increased longevity you can opt for pressure treatment. In a pressurised tank chemical preservatives are forced deep into the wood’s fibres to resist rot or decay. Upgrading to Pressure Treated means you also get an extended 15 year guarantee.

2. Personalise your summerhouse

11mm Tongue and Groove

Our Standard flooring option which provides a durable, solid foundation and underfoot to the building. The 11mm option is ideal for less demanding and frequent usage, suitable for lighter intensity purposes like summer houses and other living spaces containing light furniture. The 11mm tongue and groove timber makes this a solid yet suitable, economical option.

19mm Tongue and Groove

1.7 times thicker than our standard 11mm flooring, our premium floor is the perfect choice for higher intensity usage. The construction uses thick 19mm Tongue and Groove timber, which gives you not only the strength, but better insulation against the cold weather. This specific floor is the perfect option if you’re planning on using the building as an everyday use office, gym or games room with heavy objects.

Mineral felt

Quick and easy to apply, Mineral felt is durable and protects the building against the elements. The mineral felt is also more durable than traditional sand felt, meaning that it does not need to be regularly replaced, making it a long term, cost effective option.

EPDM Roof Covering

EPDM is a rubber based polymer that is fast and easy to install. It is a great alternative to felt and other roofing solutions, It is resistant to ozone and UV radiation while still being weatherproof and less affected by temperature changes. This option provides a more durable covering for your building while giving a stylish black look to the roof.

3. Add Extras

Complete your building with optional shelving, guttering, base options, assembly kits and more.

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Finance Calculation for your £1,439.00 order

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Dimensions

  • Dual Entrance Summerhouse
  • Strong Tongue and Groove build
  • Tall reverse apex construction
  • Long, styrene glazed windows
  • 11mm Tongue and Groove Floor and Roof
  • Changeable configuration to suit your garden
  • Complete with felt, fixtures and fittings
  • Pressure treated option available
  • Base Coat Treated for Transit
Overall Dimensions (Includes Roof Overhang)
image
  • (A) Width: 3.58m (11ft9)
  • (B) Depth: 3.18m (10ft5)
  • (C) Ridge: 2.47m (8ft1)
  • (D) Eaves: 1.73m (5ft8)

Why buy the Tessa Dual Entrance Summerhouse?

BillyOh<br/>Guarantee
BillyOh
Guarantee

Protects the wood on your building against rot and decay.

UK<br/>Manufactured
UK
Manufactured

Over 20 years of experience in design and production.

Extra<br/>Head-Height
Extra
Head-Height

Crouch free design, giving you the ultimate space.

Complete<br/>Building
Complete
Building

11mm Tongue and Groove roof, floor and green mineral felt roof covering.

Key Features

Dual Entrance

Two sets of double doors not only means access into the building is accessible no matter the configuration of your garden but also invites a lovely breeze in on those hot summer days.

Durable Tongue & Groove

The Tongue and Groove boards interlock with one another to form a tight seal offering high quality weather protection.

Green Mineral Felt

Quick and easy to apply, our premium mineral felt is durable and protects your building against harsh weather.

Key features
Galvanised Ironmongery

Heavy duty hinges, latches and handles included, galvanised for maximum weather protection.

Shatterproof Glazing

The long Durable Single SAN glazing windows wrap around two sides of the summerhouse allowing plenty of natural light in and providing wonderful views of your garden.

Adaptable Configuration

No matter the shape of your garden, the movable panels allow you to place the doors and windows where you prefer them, leaving you in control.

Tessa Customer Testimonials

Lisa Read all Tessa Customer Testimonials
Lisa

Frequently Asked Questions

EXPAND ALL COLLAPSE ALL

The BillyOh guarantee covers this building against:

  • rot
  • decay
  • insect infestation

Please note: The guarantee does not cover timber splits or warping which may occur naturally over time.

Duration of Guarantee:

  • Tongue and Groove Buildings - up to 10 years
  • Log Cabins - up to 10 years
  • Pressure Treatment Buildings - up to 15 years

For more information about BillyOh Guarantee, please visit our terms and conditions

  • 11mm Tongue & Groove Wall panels
  • 11mm Tongue & Groove Roof
  • 11mm Tongue & Groove Floor
  • Single glazed fixed windows (amount depends on size)
  • Single glazed double doors
  • Green mineral roof felt
  • All fixtures and fittings
  • Comprehensive assembly instructions

Spray Treated: Our sheds and summerhouses get a beautiful golden brown spray treatment before leaving the factory in order to preserve the quality of the wood up until the delivery. As this only lasts through the transit stage, we do advise treating the wood after installation to protect and preserve it, as well as annual maintenance.

Pressure Treated: For an extra level of protection, you can opt for a pressure treated building which is an effective way of keeping the wood long lasting. This is an extra step in the manufacturing process where the wood is treated in a pressurised tank. Chemical preservatives are forced deep into the wood’s fibres to resist rot, decay and termites. When you upgrade to Pressure Treatment, the guarantee is extended from 10 to 15 years.

With the Tessa an 11mm tongue and groove floor and roof is included.

Roof:

11mm: Our standard roof option, this interlocking roof provides a reliable covering for any building. The Tongue and Groove not only gives your building a stronger roof but also a premium look and feel.

Floor:

11mm: Our Standard flooring option which provides a durable, solid foundation and underfoot to the building. The 11mm option is ideal for less demanding and frequent usage, suitable for lighter intensity purposes like summer houses and other living spaces containing light furniture. The 11mm tongue and groove timber makes this a solid yet suitable, economical option.

All garden buildings should be assembled on a firm and level base. A base will ensure your building has a solid, long-lasting and well-drained foundation.

If you want to build your own base, from a sturdy material such as concrete or flagstones, you can find minimum dimensions for each size of this building in the tech specs. In order to protect your building from moisture, you should leave a 2ft gap around the exterior of your building, so remember to take this into consideration when laying any sort of base.

Our robust and simple to use EcoBase provides you with a firm, long-lasting foundation with suitable drainage for your garden building. It is quick and easy to install through the use of snap connectors that link the grids to each other.

We do not offer an installation service on any of our buildings, as they are designed to be easy and simple to assemble. Using the digital assembly instructions included in your order confirmation and with a team of at least 2 people, the handy pre assembled panels mean you will have your BillyOh building up in no time!

We do not offer an installation service on any of our buildings, our buildings are designed & made to be easy and simple to assemble. Using the assembly instruction included and with a team of just 2 people and a bit of DIY knowledge you can expect to have your BillyOh building up within a day, or as little as 3-4 hours with some of our smaller buildings.

Our sheds and summerhouse are delivered in easy to assemble panels. For your convenience the panels are no wider than 4ft so they can be easily maneuverable and fit through a standard doorway. Glazing and any additional wood is delivered in separate, clearly labeled packages.

Your order can be tracked through the account section on our website or by contacting us directly. You will be contacted after your order via your online account, email or text to provide updates on delivery dates.

We offer a pay by finance option on any purchase over the value of £560.

Our simple finance options allow you to spread the cost of your purchase over 24, 36 or 48 months.Read more about our Pay by Finance option here.

Tessa Reverse Apex Summerhouse


Wooden Summer House


This stylish summer house is the perfect option for those who want to enjoy their outdoor space to the fullest. Wide double doors open up a world of possibilities from storage space to a garden office. With a range of sizes on offer, let your summer house ideas run wild or check out our blog for inspiration.


Premium Tongue & Groove Cladding


Durable tongue & groove panels are the standard flooring option with the ability to upgrade and pressure treat both your floor and standard roof option. This cladding style gives the Tessa a tight seal against water ingress in even harsh weather conditions. The Tessa also comes with a range of colour options available to purchase.


Apex Roof Style


A tongue and groove apex summerhouse offers more than suitable drainage with its sloping roof panels. Long, styrene glazed windows also help you maximise on natural light whilst providing a safe and well-insulated solution.


Pressure Treatment


Opting for pressure timber treatment will protect your building from moisture and offer an extra level of protection. Your Tessa summerhouse will be delivered with golden brown spray treatment otherwise and we advise on further treatment of the wood after installation.


Whereas, with optional pressure treatment you can get not only a high-quality decorative finish but a guarantee against rot with maximum weather protection. Then, simply erect your Tessa summerhouse on a concrete base or other raised, level base to protect your summerhouse against groundwater and rising damp.


Garden Office


The Tessa summer house naturally lends itself to a variety of uses. From everyday use office to summerhouse bars or simply somewhere to store extra garden furniture, we've seen our customers convert this summerhouse into it all!


Green Mineral Roof Felt


The Tessa comes with various roofing options upon purchase, but premium green mineral roof felt is supplied as standard to offer a reliable covering. Plus, with a ridge height of 2.47m (8ft1), your Tessa summerhouse falls within the height allowed as 'permitted development' (without planning permission).


Double doors


Double doors and  single glazing windows help this garden building to maximise natural light and good airflow in the safest way possible.


Assembly Service


We don't offer an installation service on our BillyOh buildings as they all come with comprehensive assembly instructions. You and a friend can have your Tessa up on a sturdy and level base in just a matter of hours.


Guarantee


Like the ridge, the eaves height of this summer house fall under the purview of 'permitted development'. The Tessa also comes with a 10-year guarantee protecting this building against rot, insect infestation, and decay.


With dependable quality from durable tongue & groove construction and high-quality European-sourced timber, you can further protect wood against rot by getting it pressure treated. Then we can increase our guarantee to 15 years.


Garden Buildings Direct - Deliveries


Garden Buildings Direct, we stock a wide range of high-quality products. Manufactured in the UK, we can get your BillyOh building out to your delivery address in as little as 1 - 4 weeks. With fast and free delivery to most of mainland UK, simply enter your delivery postcode to get started on buying your outdoor building.


Otherwise, check out our FAQ for more information or get in touch with our friendly customer service team.

See how others have used the Tessa Reverse Apex :

Dimensions 12 x 10 16 x 10 12 x 10 Pressure Treated 20 x 10 16 x 10 Pressure Treated 20 x 10 Pressure Treated
Width 358.2cm 475.4cm 358.2cm 592.6cm 475.4cm 592.6cm
Depth 318.3cm 318.3cm 318.3cm 318.3cm 318.3cm 318.3cm
Width (Internal) 346cm 463.2cm 346cm 580.4cm 463.2cm 580.4cm
Depth (Internal) 293cm 293cm 293cm 293cm 293cm 293cm
Ridge Height (Inc Floor) 247cm 247cm 247cm 247cm 247cm 247cm
Eaves Height (Inc Floor) 173.2cm 173.2cm 173.2cm 173.2cm 173.2cm 173.2cm
Ridge Height (Internal) 242.4cm 242.4cm 242.4cm 242.4cm 242.4cm 242.4cm
Eaves Height (Internal) 175.4cm 175.4cm 175.4cm 175.4cm 175.4cm 175.4cm
Door Opening Size (w x h) 114.8cm x 163.9cm 114.8cm x 163.9cm 114.8cm x 163.9cm 114.8cm x 163.9cm 114.8cm x 163.9cm 114.8cm x 163.9cm
Door Width 58.3cm 58.3cm 58.3cm 58.3cm 58.3cm 58.3cm
Door Height 164.5cm 164.5cm 164.5cm 164.5cm 164.5cm 164.5cm
Minimum Base Width 358cm 475cm 358cm 593cm 475cm 593cm
Minimum Base Length 318cm 318cm 318cm 318cm 318cm 318cm
Window Dimensions 50.6cm x 125.3cm 50.6cm x 125.3cm 50.6cm x 125.3cm 50.6cm x 125.3cm 50.6cm x 125.3cm 50.6cm x 125.3cm
Glazing Thickness 0.12cm 0.12cm 0.12cm 0.12cm 0.12cm 0.12cm
Frame Thickness (w x d) 2.8cm x 2.8cm 2.8cm x 2.8cm 2.8cm x 2.8cm 2.8cm x 2.8cm 2.8cm x 2.8cm 2.8cm x 2.8cm
Materials 12 x 10 16 x 10 12 x 10 Pressure Treated 20 x 10 16 x 10 Pressure Treated 20 x 10 Pressure Treated
Glazing Material Styrene Styrene Styrene Styrene Styrene Styrene
Floor Material 11mm Tongue and Groove 11mm Tongue and Groove 11mm Pressure Treated Tongue and Groove 11mm Tongue and Groove 11mm Pressure Treated Tongue and Groove 11mm Pressure Treated Tongue and Groove
Roof Material 11mm Tongue and Groove 11mm Tongue and Groove 11mm Pressure Treated Tongue and Groove 11mm Tongue and Groove 11mm Pressure Treated Tongue and Groove 11mm Pressure Treated Tongue and Groove
Features 12 x 10 16 x 10 12 x 10 Pressure Treated 20 x 10 16 x 10 Pressure Treated 20 x 10 Pressure Treated
Windows 6 Windows All Fixed 8 Windows All Fixed 6 Windows All Fixed 10 Windows All Fixed 8 Windows All Fixed 10 Windows All Fixed
Factory Basecoat Treatment Red Cedar Water Based Treatment for Transit Red Cedar Water Based Treatment for Transit Pressure Treated Red Cedar Water Based Treatment for Transit Pressure Treated Pressure Treated
Shed Type Summer House Summer House Summer House Summer House Summer House Summer House
Roof Style Reverse Apex Reverse Apex Reverse Apex Reverse Apex Reverse Apex Reverse Apex
Cladding Style Tongue and Groove Tongue and Groove Tongue and Groove Tongue and Groove Tongue and Groove Tongue and Groove
Please Note: This product has been designed as an affordable solution to most popular light domestic uses. All products supplied self assembly flat packed unless otherwise stated.

Videos & Guides

Our resource library offers step by step instructions, explanation videos and customer content to help you to plan, buy and build your garden building.

Assembly

We do not offer an installation service on any of our buildings, as they are designed to be easy and simple to assemble. Using the digital assembly instructions included in your order confirmation and a team of at least 2 people, the handy pre-assembled panels mean you will have your BillyOh building up in no time!

See just how easy our buildings are to assemble in this video:

Tessa Customer Testimonials

We love to catch up with our customers to see how they’re getting on with their garden buildings. Check out how some of our customers have decorated their garden building and read what they had to say about it.

Lisa

"It had more windows than everything else, and the dual aspect doors made for a flexible space. We chose Garden Buildings Direct because of the good value and a good selection of summerhouses."

Read more

Lisa
We’re using it as an additional living room/home office and it’s allowed us to get some quiet time away from the house and kids! It gives us more space, especially when we’re home working permanently now. We’ve painted, insulated and plastered the areas we could for all year round use.
Our favourite thing is the windows to let us view all around the garden and see the seasons whatever the weather We needed a good head height due to a 6ft 4" Fiance! We had to alter some of the struts but it’s now tall enough for him to stand up in.
It was a good experience. Just remember to plan out how you want to use the area and don't overfill your space. Choose neutral colours and try to bring the outside in with lots of greenery and cosy blankets for snuggling.

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