1. Select Size

Size measured in feet

2. Personalise your summerhouse

3. Add optional extras

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What you need to know about the

BillyOh Holly Tongue and Groove Apex Summerhouse

A Modern Design Apex Building

11mm Tongue & Groove Sections
Tongue & Groove M&T Door - Double
All Fixings
Comprehensive Assembly Instructions
Optional Customer Pre-assembled Roof
Optional Pre-assembled Floor
Optional Heavy Duty Roof with Additional Trusses

BillyOh Holly Tongue and Groove Apex Summerhouse Key Features

T&G Panel Construction

Customisable Options

Modern M&T Constructed Doors

Modern Window Option

Popular Apex Roofing

Stronger T&G Roof Cladding Option

Modern-Style Apex Summerhouse

Heavy-Duty Tongue & Groove Build

Tallest Apex Increased Headroom

Multiple Size Options Available

Pressure Treatment Available For Low Maintenance

Modern-Designed Windows and M&T Double Doors

Weatherproof Roof Cover Options

*Shingle tiles are available on the 11mm T&G Standard and 11mm T&G Heavy Duty roof options only.

Solid Double-braced Truss Support

Premium Roof Options

Optional Solid Sheet or T&G Floor Materials

And there’s more...


What's Included


  • Optional pre-assembled Floor: (9mm OSB, 10mm solid sheet, 11mm TG, 11mm Pressure Treated TG, 19mm Pressure Treated TG, 19mm TG)
  • Optional pre-assembled Roof: (9mm OSB, 8mm solid sheet,11mm TG)
  • Optional heavy Duty roof includes additional trusses
  • Optional Felt Options: Sand or Mineral
  • Optional Shingles: Shingles + Sand felt Capping
  • Optional Pressure Treated
  • 11mm T&G Sections
  • T&G Door - Double
  • Fixtures and fittings
  • Comprehensive Assembly instructions

Tall Apex Increased headroom

Tall Apex Increased headroom


Strong T&G Build and construction

Strong T&G Build and construction


Versatile Modern Window Positioning

Versatile Modern Window Positioning


Modern Apex Design made in Great Britain

Modern Apex Design made in Great Britain

Welcome to the BillyOh Holly Summerhouse Range. We have added this tongue and groove (T&G) modern apex summerhouse design to the range. Long windows and our tongue and groove construction provide an extra tall summerhouse at great value.

The Holly is available in a multitude of different sizes to suit all garden types and styles.The smaller buildings are great as a light and airy family room (8x8 to 12x10), in addition the larger sizes offer a larger space to entertain (16x8 to 20x10).

We have a size to suit your garden size and shape.

Pressure Treated Option

Each wood board is soaked in treatment until it is absorbed then dried. This protects the wood inside-out which is better than regular treatment spraying or using rollers which only coats the surface of the wood.

The pressure treatment penetrates the wood leaving you with a building that is low maintenance and doesn’t need treatment at home. You will save money in the long run and free yourself of maintenance worries.

Pressure Treated Option
Relax in Your Garden

Relax in Your Garden

The long modern windows and door design offer a peaceful and tranquil place to relax and enjoy your garden in all weathers. Simply shut yourself inside with a good book and listen to the breeze and natural sounds of the garden.

The extra high panel design ensures that the roof feels elevated well above your head giving a spacious and airy feel. The panoramic window frontage allows plenty of natural light throughout the day.

We recommend the T&G floor options to really compliment the T&G panels, the 11mm T&G is the recommended and more popular selection, but if you want that really solid feel upgrade to the 19mm T&G for our heavy duty floor.

Solid Tongue and Groove Construction

The Holly Summerhouse utilising our pre-engineered tongue and groove panels using our tallest framing. The traditional construction method offers great strength and protection against the british weather.

Our Uk based workforce hand make these panels using traditional methods. The boards are pre-machine and cut to length, these interlock together where the tongues and grooves meet, giving the panel its strength.

All our panels are easy to manage and assemble into your shed, with the smaller sections you get additional framing, than larger panel constructions.

In addition to the T&G engineering, you can take the protection and maintenance of your building up a notch by going for the Pressure Treatment option which infuses each wood with treatment. This increases the longevity of the building and frees your maintenance worries.

Solid Tongue and Groove Construction
Modern Door and Windows

Modern Door and Windows

Enjoy all angles of your garden, with the panoramic modern long window and door configuration. Enjoy your garden in all weathers, sheltering from the rain or from the sun .

The construction method used on the doors is a well known carpentry style of mortise and tenon joints. This is coupled with simple beading used on both the door and windows, which are glazed using 1.8mm styrene.

Place the Side Windows to suit your garden

Our Gardens are our places to relax and safe havens from the busy world. With our modular design you can select where you place the side windows, to suit your garden design and style.

The most popular style if you are placing your summerhouse as a centre piece is having the panoramic window style as pictured.

If you are placing your summerhouse in the corner, then why not place the windows down one side for a better view of your garden. The 10x8 and 10x10 options are not suitable for this option.

These are our most popular design styles made possible by modular design.

Place the Side Windows to suit your garden
Select a Floor Option to Suit your Needs

Select a Floor Option to Suit your Needs

Choose from a range of floor options. OSB offers a value floor for the shed, while the Durelis Solid Sheet provides a water resistant, standard level of protection. These floors are suited to lighter items being placed in the storage unit.

The 11mm T&G provides a stronger, interlocking floor for the shed. For larger and heavier items, we recommend, our premium flooring options which are the 19mm T&G floor and the pressure treated 19mm T&G floor.

If you’re looking for a floor which is durable and well protected, pressure treatment is a great choice. This floor option provides unmatched strength and durability. It also means no treatment is required at home.

Fits Through a Standard Door

The BillyOh modular design method uses smaller easier to manage panels, making assembly and maneuvering easier and safer. All of our panels fit through a standard size house front or back door.

If access to your garden is tricky or a long walk, we have the solution as the panels smaller in size making them easier to handle and transport.

Fits Through a Standard Door
Roof Options

Roof Options

Reasons to Choose T&G

T&G Roof Panels are stronger compared with OSBs and Solid Sheets. Choosing T&G will also give you the option to use shingles as a cover for your roof increasing the overall sturdiness of the building and lifespan.

Reasons to Choose Pressure Treated

Experts say that the roof would have to be one of the toughest yet most bombarded sections of the building. We recommend all our customers to enhance the defensive capability of their roofs further by having it ordered pressure treated. The treatments dramatically increases the durability of your roof and frees you of your maintenance worries.

Roof Covering Options

Holly Summerhouses come with Sand Felt for basic roof covering protection. You can upgrade your roof cover to Mineral Felt to add extra protection against elements.

But for heavy duty protection and increased longevity, nothing beats shingles. Either Roll-On or eaves-capped shingles, the roof of your summerhouse is transformed into a vanguard capable of taking on the harshest weather conditions.

Roof Covering Options
Dimensions 8 x 8 10 x 8 12 x 8 8 x 10 10 x 10 16 x 8 12 x 10 8 x 8 Pressure Treated 16 x 10 10 x 8 Pressure Treated 8 x 10 Pressure Treated 12 x 8 Pressure Treated 20 x 10 10 x 10 Pressure Treated 12 x 10 Pressure Treated 16 x 8 Pressure Treated 16 x 10 Pressure Treated 20 x 10 Pressure Treated
Width 259.8cm 259.8cm 259.8cm 318.3cm 318.3cm 259.8cm 318.3cm 259.8cm 318.3cm 259.8cm 318.3cm 259.8cm 318.3cm 318.3cm 318.3cm 259.8cm 318.3cm 318.3cm
Depth 241cm 299.6cm 358.2cm 241cm 299.6cm 475.4cm 358.2cm 241cm 475.4cm 299.6cm 241cm 358.2cm 592.6cm 299.6cm 358.2cm 475.4cm 475.4cm 592.6cm
Width (Internal) 234.4cm 234.4cm 234.4cm 303cm 303cm 234.4cm 303cm 234.4cm 303cm 234.4cm 303cm 234.4cm 303cm 303cm 303cm 234.4cm 303cm 303cm
Depth (Internal) 228.8cm 287.4cm 346cm 228.8cm 287.4cm 463.2cm 346cm 228.8cm 463.2cm 287.4cm 228.8cm 346cm 580.4cm 287.4cm 346cm 463.2cm 463.2cm 580.4cm
Ridge Height (Inc Floor) 234cm 234cm 234cm 247cm 247cm 234cm 247cm 234cm 247cm 234cm 247cm 234cm 247cm 247cm 247cm 234cm 247cm 247cm
Eaves Height (Inc Floor) 173.2cm 173.2cm 173.2cm 173.2cm 173.2cm 173.2cm 173.2cm 173.2cm 173.2cm 173.2cm 173.2cm 173.2cm 173.2cm 173.2cm 173.2cm 173.2cm 173.2cm 173.2cm
Ridge Height (Internal) 229.3cm 229.3cm 229.3cm 242.4cm 242.4cm 229.3cm 242.4cm 229.3cm 242.4cm 229.3cm 242.4cm 229.3cm 242.4cm 242.4cm 242.4cm 229.3cm 242.4cm 242.4cm
Eaves Height (Internal) 175.4cm 175.4cm 175.4cm 175.4cm 175.4cm 175.4cm 175.4cm 175.4cm 175.4cm 175.4cm 175.4cm 175.4cm 175.4cm 175.4cm 175.4cm 175.4cm 175.4cm 175.4cm
Door Opening Size (w x h) 117.2cm x 172.6cm 117.2cm x 172.6cm 117.2cm x 172.6cm 117.2cm x 172.6cm 117.2cm x 172.6cm 117.2cm x 172.6cm 117.2cm x 172.6cm 117.2cm x 172.6cm 117.2cm x 172.6cm 117.2cm x 172.6cm 117.2cm x 172.6cm 117.2cm x 172.6cm 117.2cm x 172.6cm 117.2cm x 172.6cm 117.2cm x 172.6cm 117.2cm x 172.6cm 117.2cm x 172.6cm 117.2cm x 172.6cm
Door Width 58.3cm 58.3cm 58.3cm 58.3cm 58.3cm 58.3cm 58.3cm 58.3cm 58.3cm 58.3cm 58.3cm 58.3cm 58.3cm 58.3cm 58.3cm 58.3cm 58.3cm 58.3cm
Door Height 172cm 172cm 172cm 172cm 172cm 172cm 172cm 172cm 172cm 172cm 172cm 172cm 172cm 172cm 172cm 172cm 172cm 172cm
Materials 8 x 8 10 x 8 12 x 8 8 x 10 10 x 10 16 x 8 12 x 10 8 x 8 Pressure Treated 16 x 10 10 x 8 Pressure Treated 8 x 10 Pressure Treated 12 x 8 Pressure Treated 20 x 10 10 x 10 Pressure Treated 12 x 10 Pressure Treated 16 x 8 Pressure Treated 16 x 10 Pressure Treated 20 x 10 Pressure Treated
Glazing Material Styrene Styrene Styrene Styrene Styrene Styrene Styrene Styrene Styrene Styrene Styrene Styrene Styrene Styrene Styrene Styrene Styrene Styrene
Floor Material Optional Optional Optional Optional Optional Optional Optional Optional Optional Optional Optional Optional Optional Optional Optional Optional Optional Optional
Roof Material Optional Optional Optional Optional Optional Optional Optional Optional Optional Optional Optional Optional Optional Optional Optional Optional Optional Optional
Roof Covering Material Optional Optional Optional Optional Optional Optional Optional Optional Optional Optional Optional Optional Optional Optional Optional Optional Optional Optional
Features 8 x 8 10 x 8 12 x 8 8 x 10 10 x 10 16 x 8 12 x 10 8 x 8 Pressure Treated 16 x 10 10 x 8 Pressure Treated 8 x 10 Pressure Treated 12 x 8 Pressure Treated 20 x 10 10 x 10 Pressure Treated 12 x 10 Pressure Treated 16 x 8 Pressure Treated 16 x 10 Pressure Treated 20 x 10 Pressure Treated
Windows 6 Windows All Fixed 6 Windows All Fixed 6 Windows All Fixed 6 Windows All Fixed 6 Windows All Fixed 6 Windows All Fixed 6 Windows All Fixed 6 Windows All Fixed 6 Windows All Fixed 6 Windows All Fixed 6 Windows All Fixed 6 Windows All Fixed 6 Windows All Fixed 6 Windows All Fixed 6 Windows All Fixed 6 Windows All Fixed 6 Windows All Fixed 6 Windows All Fixed
Factory Basecoat Treatment Red Cedar Water Based Treatment for Transit Red Cedar Water Based Treatment for Transit Red Cedar Water Based Treatment for Transit Red Cedar Water Based Treatment for Transit Red Cedar Water Based Treatment for Transit 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 Pressure Treated Red Cedar Water Based Treatment for Transit Pressure Treated Pressure Treated Pressure Treated Pressure Treated Pressure Treated
Shed Type Summer House Summer House Summer House Summer House Summer House Summer House Summer House Summer House Summer House Summer House Summer House Summer House Summer House Summer House Summer House Summer House Summer House Summer House
Roof Style Apex Apex Apex Apex Apex Apex Apex Apex Apex Apex Apex Apex Apex Apex Apex Apex Apex Apex
Cladding Style Tongue and Groove Tongue and Groove Tongue and Groove Tongue and Groove Tongue and Groove Tongue and Groove Tongue and Groove Tongue and Groove Tongue and Groove Tongue and Groove Tongue and Groove Tongue and Groove Tongue and Groove Tongue and Groove Tongue and Groove Tongue and Groove Tongue and Groove Tongue and Groove
Pre-Assembled Side Panels Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes
Supplied with Fixtures and Fittings Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes
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.

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