Tongue and Groove Pent Summerhouses | Project Timber
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Summerhouse · HOBBYIST · PRESSURE TREATED · PENT ROOF


A place to slow down.

A contemporary pent roof design with gable-end doors, long front windows and pressure-treated tongue and groove construction throughout.

From £1,199

Build your Summerhouse.

Hobbyist Pent H100 Summerhouse – Pressure Treated Tongue and Groove

Made in Britain
Selected size: None
Description

The Hobbyist H100 Pent Summerhouse is built from pressure-treated 11mm shiplap tongue and groove cladding with doubled-up framing throughout. Tall double doors sit in the gable end, with your choice of left or right hand position, and long glazed windows across the front fill the space with natural light. 4mm toughened glass is included free in every door and window, and the contemporary pent roof comes with black sand felt as standard. Pre-assembled modular panels make for a straightforward build, backed by a 25-year anti-rot guarantee* for lasting peace of mind.

Key features
  • Pressure-treated 11mm shiplap tongue and groove cladding
  • Doubled-up framing throughout
  • Tall wide double doors in the gable end
  • Choice of left or right hand door position
  • Long glazed windows across the front
  • FREE 4mm toughened glass throughout
  • 11mm tongue and groove roof (included as standard)
  • 11mm tongue and groove floor (upgrade to 19mm available)
  • Black sand felt roof covering as standard
  • 1.7m internal eaves height
  • Pre-assembled modular panels
  • 25-year anti-rot guarantee*
  • All fixtures, fittings and fixings included
  • Free UK delivery on selected postcodes*
View full specifications

Free delivery to most mainland UK postcodes*
Delivery available from Sep, 2nd Wed · choose your delivery date at checkout
£4,461.00
inc. VAT

Prices as per the live configurator. Paint/trim swatch colours are indicative approximations.

Get the highlights.

Watch the showcase
Pressure-treated tongue and groove 11mm shiplap cladding.

Pressure-treated tongue and groove 11mm shiplap cladding.

For a stronger and longer lasting building with engineered interlocking cladding.

Doors in the gable end.

Doors in the gable end.

Tall double doors in the gable, with your choice of left or right hand position.

FREE 4mm toughened glass throughout.

FREE 4mm toughened glass throughout.

4mm toughened glass in every door and window as standard.

25-year anti-rot guarantee*

25-year anti-rot guarantee*

Pressure-treated against fungal decay and rot, painting required annually.

11mm tongue and groove pent roof.

11mm tongue and groove pent roof.

Contemporary pent roof with black sand felt as standard.

Pre-assembled modular panels for easy assembly.

Pre-assembled modular panels for easy assembly.

Flatpacked and fits through a standard UK door with all fixings included.

In the box

Everything you need, in one delivery.

No hidden extras and no surprise add-ons. Your Summerhouse arrives complete — every panel, fixing and fitting ready to go.

Hobbyist Pent H100 Summerhouse – Pressure Treated Tongue and Groove
  • Pressure-treated 11mm shiplap tongue and groove cladding
  • Pre-assembled modular panels (interchangeable)
  • Tall wide double doors in the gable end
  • Long glazed windows across the front
  • 11mm tongue and groove roof (included as standard)
  • 11mm tongue and groove floor (upgrade to 19mm available)
  • Doubled-up framing throughout
  • Black sand felt roof covering as standard
  • All fixtures, fittings and fixings included
  • Easy-to-follow, illustrated assembly instructions
  • Free UK delivery, *on selected postcodes
Configure your Summerhouse
Why the Pent Summerhouse

Eight reasons it's built differently.

Free Pressure Treatment

Factory-applied before it leaves us, at no extra cost.

11mm Shiplap

Tongue and groove cladding that interlocks for a stronger, more durable wall.

T&G Floor and Roof

Tongue-and-groove floor and roof for a solid, tight build.

FREE 4mm Toughened Glass

Single glazed windows and doors included as standard.

Modular Panels

Pre-assembled sections that fit through a standard door.

25 Year Anti-rot Guarantee*

Pressure-treated against fungal decay and rot. Painting required annually.

Easy Self Assembly

Stage-by-stage illustrated instructions with all fixings included.

Free UK Day Delivery*

We offer free UK delivery on selected postcodes.

Hobbyist Pent H100 Summerhouse – Pressure Treated Tongue and Groove
YOUR GARDEN, YOUR SPACE

A modern take on the classic summerhouse.

The pent roof gives the H100 a cleaner, more contemporary look than a traditional apex design. It sits lower in the garden, blends more easily against fences and boundaries, and still delivers a comfortable, light-filled interior. Tall double doors and long front windows mean there’s plenty of natural light inside, and the whole building is made for relaxing, working from the garden or setting up a hobby space.

11mm
Shiplap cladding
34mm
Double-up framing
1.7m
Eaves height
SHIPLAP TONGUE & GROOVE CLADDING

Tough timber, built to weather.

Built from pressure-treated 11mm shiplap tongue and groove cladding with doubled-up framing at every joint. The 11mm T&G roof is included as standard, and a choice of roof coverings lets you upgrade the weather protection to suit, giving you years of enjoyment.

Hobbyist Pent H100 Summerhouse – Pressure Treated Tongue and Groove
Built to last · Made in Britain

Engineered stronger where it counts.

Built from pressure-treated 11mm shiplap tongue and groove cladding with doubled-up framing at every joint. The 11mm T&G roof is included as standard, and a choice of three roof coverings lets you upgrade the weather protection to suit. Built properly and treated annually, this is a summerhouse that will give you years of enjoyment.

50+
Years' experience
UK
Designed & made
Hobbyist Pent H100 Summerhouse – Pressure Treated Tongue and Groove
Assembly

Most of the build is already done.

Your Summerhouse arrives as pre-assembled, pre-insulated panels — designed to fit through a standard UK doorway and slot together with far fewer parts than a traditional log cabin. A quicker, simpler build, whether you do it yourself or bring in help.

Every building includes clear, step-by-step illustrated instructions. We recommend two people with basic DIY know-how — or add our assembly service at checkout and we'll handle it for you.

Add assembly at checkout
Make it yours

Configure it around how you'll use it.

Floor thickness

Floor thickness

Choose 11mm or 19mm tongue and groove floor to suit how you plan to use the building.

Wide range of sizes

Wide range of sizes

Multiple sizes from compact to large. All pressure-treated as standard.

Roof covering

Roof covering

Mineral felt as standard. Upgrade to green felt or EPDM rubber roof for longer protection.

Guttering

Guttering

Add guttering to manage rainwater runoff and protect the base of your building.

Shelving

Shelving

Add a 4-shelf stack or full-length side shelving to make the most of the interior space.

Timber base

Timber base

Optional timber base for use on firm, level ground without a concrete base. Assembly required.

Build & price yours
Hobbyist Pent H100 Summerhouse – Pressure Treated Tongue and Groove
SPACE, DONE PROPERLY

Unwind in style

For those long afternoons you don't want to end.

Specifications

SelectSize
SelectMeasurements

Overall Dimensions

Overall Width253 cm
Overall Depth229.2 cm
Total Wall Thickness (incl. insulation)80 mm
Width (internal)229 cm
Depth (internal)174.3 cm

Eaves & Ridge

Eaves Height (inc. floor)230.7 cm
Eaves Height (excl. floor)218.2 cm
Ridge Height (inc. floor)240.2 cm
Ridge Height (excl. floor)227.7 cm
Eaves Height (internal)204.4 cm
Ridge Height (internal)212.4 cm

Doors

Door Height180 cm
Door Width73 cm
Door Opening (H × W)H180 × W73 cm

Windows

Glazing Thickness4–20–4 mm
Frame Thickness (H × W)2.7 × 4.4 cm

Floor & Base

Overall Floor Size (W × D)249 × 194.3 cm
Base Size244 × 189.3 cm

Materials

Cladding9mm LP Strongcore composite
Floor materialTongue & groove
Roof materialGalvanised steel & foam insulation
Roof coveringGalvanised steel
GlazingDouble glazing

Features

Building typeGarden room
Windows4
Roof stylePent
Cladding styleComposite board
Locking systemUPVC multi-point
U-value, metal roof0.49 W/(m²·K)
U-value, walls & floor0.31 W/(m²·K)
Pre-assembled panelsYes
Interchangeable windowsNo
Fixtures & fittingsYes

Dimensions shown for the 8 × 6; imperial values are converted from metric. 15-year anti-rot guarantee on composite — annual treatment required; terms apply.

Questions, answered.

Do I need planning permission?
Usually not. Our buildings are designed to stay under 2.5m in height and fall under "permitted development," so planning permission typically isn't required. Always check with your local authority if you're in a conservation area, national park or listed building, and note the building shouldn't be used as self-contained accommodation. We don't offer legal advice — please confirm with your local planning authority before ordering.
Do I need a base?
Yes — all garden buildings must be assembled on a solid, level foundation. Our purpose-made Eze Base provides a solid, level foundation with minimal groundwork; ask us to add it to your order. Assembling on an unsuitable foundation may invalidate your warranty.
Is it difficult to assemble?
No. The panels arrive pre-assembled and pre-insulated and fit through a standard doorway. We recommend two people with basic DIY tools, and every building comes with clear, illustrated instructions. Prefer not to build it? Add our assembly service at checkout.
How is it delivered?
Kerbside, by lorry or van. You choose a preferred delivery date at checkout and we do our best to meet it — at busier times we may need to agree an alternative date with you, and we'll keep you informed throughout. Please ensure there's clear access in front of your property on the delivery date.
★ 15-year anti-rot guarantee

Bought with confidence.

Free delivery to selected postcodes, and Made in Britain.

Customer photo
★★★★★

"Genuinely warm in winter — I work in here every day now. Build quality is excellent."

— Verified buyer
Customer photo
★★★★★

"Panels went together far faster than I expected. The composite finish looks premium."

— Verified buyer
Customer photo
★★★★★

"From order to install was seamless. The team kept me informed the whole way."

— Verified buyer

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