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Dunster House Ltd.
Established 1994
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FREE DELIVERY
ON MOST ORDERS
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UK COMPANY
responsibly sourced timber
RESPONSIBLY SOURCED TIMBER
millions of products
MILLIONS OF PRODUCTS SOLD
1:
Your Warmalog
APPROX 5 - 6 WEEKS
£6,544.99 †
£6,354.99 
Includes:
Insulated Walls + Insulated Floor + Insulated Roof + uPVC Windows & Doors
2:
Window And Door Options
Info Choose your uPVC colour
 
£260.00 
 
£0.00 
3:
Optional Extras
4:
Foundation Options
5:
Delivery choices*
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Free Delivery Info
TOTAL: 
£6,354.99  
inc. VAT
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Specification For 62mm Wall Thicknesses
(Change wall thickness on customization tab to update information)

Fully Insulated

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Insulated Log Cabin Fully Insulated Log
Insulated Log Cabin Fully Insulated Roof And Floor
Fully insulated
 

We never compromise on quality which is why the insulation that we use in our Warmalog cabins is of the highest specification. It’s called polyisocyanurate and it is one of the best insulators available, it’s so effective that even NASA has used it to insulate the external fuel tanks of their space shuttles!

 

Polyisocyanurate is a great material because not only is it lightweight and versatile, its high thermal conductivity makes it sought after. Competitors insulation might be cheaper, but they may use Rockwool or polystyrene, which are inferior materials. Polyisocyanurate is said to be 50% more efficient than Polystyrene and up to 100% more efficient that Rockwool.

 

It’s not just the walls that are insulated in a Warmalog cabin! We also provide the same kind of insulation for the roof (60mm thick) and for the floor (50mm thick). As well as this coverage, the Warmalog cabin comes with 24mm thick double glazing as standard.

 

All of this heat-retaining technology ensures that any Warmalog cabin can achieve a U-value of 0.69. The U-value assesses the rate of heat loss / gain through all the thicknesses of the combined elements that make up a building component such as a wall, floor or roof. Simply put the higher the U-Value the worse the product performs. Our Warmalogs U-Value of 0.69 is considered to be very low, meaning you’ll save a fortune on heating bills compared to Polystyrene or Rockwool insulated cabins!

 

62mm Interlocking Logs

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62mm Interlocking Logs Warmalogs
 
62mm Interlocking Logs
 

We only use full lengths of engineered precision cut and routed tongue and groove timber in our log cabins. These logs go through a process of being planed, leaving you with a smooth finish. We believe that using full lengths of planed timber gives you a more aesthetically pleasing and stronger product.

 

Other companies are happy to provide you with rough offcuts, glued and finger jointed together, creating a weakened cabin and off-putting appearance.

 

Slow-Grown Spruce

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Insulated Log Cabin Slow-Grown Spruce Wall
Insulated Log Cabin Slow-Grown Spruce Timber
 
Slow Grown Spruce, Not Cheap Pine
 

Unlike our competitors, we only use high-quality spruce timber in our garden log cabins rather than cheap pine or mixed timber. Why do we use slow grown spruce rather than the much cheaper knotty pine alternatives?

 

Spruce is considered more stable as it expands and contracts less than pine. This stability means that the spruce walls of our garden buildings minimise gaps appearing as the timber changes along with the weather.  We responsibly source all our timber, where it grows slowly in the cold northern regions. We all know the old adage of counting the rings to see how old a tree is, well our timber grows slower, and takes longer to get to size meaning it has more rings in it. This means it has a tighter grain, and each ring helps prevent cracks and shakes appearing in the densely packed timber.

 

Our garden buildings really are built to last therefore we use only the highest quality, slow-grown spruce.  Spruce is much more resilient to warps and splits compared to its cheaper alternative pine. Being a whitewood, it doesn’t discolour anywhere near as much as pine so it is also much more aesthetically pleasing for a log cabin. Considered more stable, less knotty and resinous than pine, spruce will also produce a lot less sap. It is also less dense meaning it is not as susceptible to mould and rot.

 

Many manufacturers use a mix of timber saving them money. They will buy the lowest cost timber and then mix these up during production, often using finger joints. Ending up with a cabin, where the walls are a mix of pine (redwood) and spruce (whitewood). Not only does the log cabin then look comical, with stripy walls of different timbers, but this just shows a lack of pride about the finished product. 

 

Pressure Treated Bearers

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Carsare Insulated Log Cabin Pressure Treated Bearers
 
Pressure Treated Floor Bearers
 
All of our garden buildings have pressure treated bearers as standard. As they are exposed to the damp, cold ground. This treatment will prevent them from rot, decay and insect infestation for up to 10 years. Due to this costly but effective process, we can offer our customers a genuine 10-year guarantee against rot and insect infestation on the bearers. We only suggest that you apply a good quality water repellent to prolong the longevity of the timber.   
 

10 Year Guarantee

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Insulated Log Cabin 10 Year Guarantee
Insulated Log Cabin 10 Year Guarantee II
 
10 year guarantee
 
All of our Pressure Treated Timber comes with a genuine 10-year Guarantee against rot and insect infestation. The process of pressure treatment forces the wood preservative into the timber rather than simply dip treating (essentially just covering the exterior) like many companies still do. If the timber is only dip treated then you would have to buy and apply treatment to your cabin every single year in order to maintain their worthless 'guarantee'. 
 

Avoid sagging roofs

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Carsare Insulated Log Cabin Avoid Sagging Roof
 
Avoid Sagging Roof
 
Warmalogs feature heavy duty 140mm or 210mm by 45mm wide supporting roof beams preventing dangerous and unsightly sagging. Just like every other part of your cabin, we only ever use one continuous length of timber. We don’t join lengths with glue or screws. We only use single pieces of timber for our purlins to provide you with a strong and stable roof.

Steel Braces

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Insulated Log Cabin Storm Braces
 
Steel Braces
 
To control natural expansion and contraction in the timber, the Warmalog features steel straps on the inside and outside of the cabin known as storm braces, secured by screws and bolts, these braces are adjusted to spread the timber's natural movement equally across a much larger area, thus avoiding the worst effects of localised expansion and contraction within the wood. 
 

uPVC Windows and Doors

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White uPVC Window
Anthracite Grey uPVC Window
 
uPVC Windows and Doors

This Warmalog cabin is supplied with domestic standard uPVC window and door frames, just like you would find in a residential property. They come in a colour choice of either White or Anthracite Grey Wood Effect, so you can tie them in with your home, or customise your garden building. We’ve been manufacturing uPVC windows and doors for over 25 years – so we really know our stuff!

 

The fully glazed wide French doors provide easy access to your log cabin, make the most of natural light, and can be thrown open to let in plenty of fresh air. They also feature trickle vents to aid ventilation and avoid moisture building up when doors and windows are closed.

Avoid Planning Permission

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Avoid Planning Permission - Carsare Warmalog Cabin with uPVC is under 2.5m High
 
Avoid Planning Permission
Our Carsare Warmalog is less than 2.5m high, so therefore typically exempt from UK planning permission as it is permitted development, even if it is close to the boundary of the property. This frees you from legal restrictions and allows you more freedom to choose your ideal site. You can now consider more personal factors such as the amount of direct sunlight it’ll receive, how easy it is to access, and its aesthetic appeal. If you want to find out more about permitted development rights see our planning guide.

Multi-Point Locking Systems

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Multi-Point Locking on Warmalog Cabin uPVC Windows
WarmaLog Cabins Multi-Point Door Locking System
 
Secure Multi-Point Locking Systems

Security is important for your log cabin, to ensure all your belongings and any valuable equipment is safe. Our uPVC Warmalog cabin doors feature an industry leading 12-point locking system. Meanwhile, the windows feature multipoint locks with secure key locking handles.

 

Our 12-point locking consists of four shoot bolts, three mushroom headed espagnolettes, three hook bolts, a locking latch and a 6-pin euro cylinder. The windows feature a multi-point locking system consisting of mushroom-headed espagnolettes which move in opposite directions into metal keeps. Why would you risk your possessions by using less?

 

So, if you are comparing cabins, don’t forget that our uPVC windows and doors offer additional security benefits!

Flyscreens Now Available

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Flyscreens now available
 
Flyscreens Available
Add a flyscreen to the windows of your garden building, so you can benefit from letting the fresh air in while keeping those pesky insects out, without restricting visibility. An insect screen will allow you to still view out of the window to survey your surroundings, watch nature and look out at the beauty of your garden.

As the effects of global warming take place, the Earth is changing, with reports suggesting an expected increase in the number of insects around the world. An increase in temperatures over the coming years will speed up the growth rate of some insects. This includes the domestic housefly, which could see a rapid rise in its population. Order your flyscreens now to protect you for the future.

 

Keeps out insects


It’s always nice to be able to throw open the windows of your garden room to enjoy a warm summer breeze or cooling air. With the addition of a flyscreen mesh, you can enjoy the warm weather without worrying about unwanted insects getting in. Keep those flying insects from buzzing around as you try to work in your garden office or relax in your summer house.

 

Ventilation and comfort

 

Ventilation and circulation of fresh air is also important for the wellbeing of you and your garden building and helps to maintain a relaxed and comfortable environment inside. Flyscreens for windows give effective protection so you don’t have the annoyance of flies and other creepy crawlies.

 

Durable materials

 

The fly mesh is made of strong and water-resistant materials to last. 
Easy to fit

 

It is provided as a simple ready to install screen to fit the size of your garden room or log cabin window and fixes to the window frame. Easy to follow instructions will be provided alongside your order.

 

Easy to use

 

The roller flyscreen is easy to operate, with a handle to pull it down when the window is open, and a small clip will keep the screen in place. When not in use, the retractable flyscreen design allows it to be discreetly hidden away. 

Practical Design

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Precision Engineered Interlocking Chamfered LogsOURS
Competitor Poorly Designed Log CabinTHEIRS
 
 
Practical and Expertly Engineered by Design

Our cabin logs are designed to interlock with a chamfered finish to ensure a snug fit. The chamfered notch system is designed to prevent damp or wind penetration. Our interlocking logs make for speedy installation and minimal need for tools. Our garden buildings have been designed on the basis that any competent DIY customer will have no problem installing a product themselves in a short amount of time.

 

Unlike some competitors, we provide interlocking precision-engineered chamfered logs. Keeping your log cabin watertight and free from unsightly draft-producing gaps.

Designed for the DIY Market

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Designed for the DIY Market 

All our garden buildings have been designed on the basis that any competent DIY customer should have no problem installing a product themselves in a short amount of time. You do not have to be an expert at DIY to build a Dunster House garden building, as we do provide you with comprehensive pictorial instructions. We totally understand that DIY is not for everyone therefore, you may want to consider getting in touch with a local carpenter or handyman to install it for you. But before you do, check out our construction video and decide for yourself! 

 

Have a question?


What is a Warmalog Insulated Log Cabin?

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A Warmalog® Insulated Log Cabin is a garden building unique to the Log Cabin industry and exclusive to Dunster House. This unique Log Cabin features a 62mm sandwich of slow-grown Spruce timber and Polyisocyanurate insulation, which come together to create a revolutionary type of wall log. and roof and floor insulation, this creates a thermally efficient garden building perfect for using all year round. Warmalog® Cabins are insulated in all directions. The floor has a 50mm thick insulated structure, the roof is 60mm (also insulated), coupled with 24mm double glazed sealed units made from 4mm toughened glass. Thanks to these and other heat-conscious design details, these Warmalog® cabins have an equivalent U value to 140mm logs and achieve a U value of 0.59. This means that you can feel confident your cabin will remain cool in the warm months and warm in the cool months.

What size Cabin can I have?

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We offer a range of Warmalog® cabins. The smallest is 2.8 metres wide by 3.0m deep, and the largest is 4.8m wide by 5.8m deep.

How big is this Insulated Log Cabin?

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This Insulated Log Cabin's measurements are: 3.80m (12' 5") x 2.80m (9' 2")

How high is this Insulated Log Cabin?

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It is 2.46m (8' 0") high

How much is this Insulated Log Cabin?

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This product starts from £ 6354.99

What base do I need for this Insulated Log Cabin?

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We recommend a flat, level base at least 100mm bigger on each side. e.g. A 4m by 3m building would have a base of 4.2m by 3.2m See more details here. The base can be concrete or made from our RapidGrid Foundation system.

Can I paint the Log Cabin?

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Yes, we recommend a superior quality light coloured 'Barn' paint for the exterior, as well as a clear silicone sealer for the joints. These are available from your local DIY shop.

Do I need planning permission for this Insulated Log Cabin?

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Take our quick survey to find out!

How thick are the walls?

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The walls of this Warmalog™ Insulated Log Cabin are 62mm Thick.

What are u-values?

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U-values tell us about the heat loss properties of the material you are measuring. The lower the number, the better insulated the Log Cabin will be. Find out more here.

Do you deliver to Scotland?

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Yes, we do! Some postcode restrictions do apply however we are pleased to be able to deliver to many parts of Scotland.

For more information - Where Do We Deliver?

Does Dunster House Responsibly Source Its Timber?

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Dunster House commit to continuously improve the sustainability level of our sourcing, by favouring stricter more credible certification and verification standards, and sourcing requirements. We are committed to avoiding sourcing from unknown or unsustainable sources.

Where possible, Dunster House are committed to procuring wood products that have been certified against credible, internationally recognised standards for good forest management, to ensure that material originates from well managed forests. In line with this, we preference products certified to the standards of FSC (Forest Stewardship Council) and PEFC (Programme for the Endorsement of Forest Certification).

What about illegal timber?

Dunster House are committed to sourcing only material that is produced, processed and traded according to applicable legislation.

What is your Environmental Responsibility policy?

Dunster House are committed to promoting responsible stewardship of the environment and its natural resources. We are committed to lessening the impact on the environment caused by our own activities, and those of our suppliers.

Do you have a Supply Chain Management policy?

Dunster House will ensure that information about suppliers and material is gathered as part of the RPP. We will ensure regular engagement with our suppliers to ensure compliance with UKTR requirements, working with them to ensure continuous improvements. We will also specify that, wherever possible, that material sourced is covered by FSC and PEFC, to ensure responsible forest management.

Have a question?


We deliver our products to mainland United Kingdom (England, Wales and most of Scotland). Some exceptions apply; these are illustrated on the map below.



Postcodes affected include:


  • TR 
  • TQ6, 7, 8, 9 
  • EX19, 20, 21, 22, 23, 38, 39
  • LD2, 3, 4, 5
  • PL10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35 
  • SA3, 4, 5, 6, 7, 8, 9, 14, 15, 16, 17, 18, 19, 20, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 70, 71, 72, 73, 61, 62, 63, 64, 65, 66, 67, 68 and 69
  • KW 
  • HS 
  • ZE 
  • KA27, 28 
  • IV1, 4, 6, 7, 8, 9, 10, 11, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 51, 52, 53, 54, 55, 56, 63 
  • PA20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 41, 42, 43, 44, 45, 46, 47, 48, 49, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 80 
  • PH32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44 

Delivery Price

Green - Free Assisted Delivery

Red - We are unable to deliver to these areas.

Purple - For orders to Ireland & Northern Ireland, please visit our Distributor in Ireland here.



Delivery Service

All of our products are delivered using our own fleet of vehicles, not sub-contractors. We have a large number of vehicles dedicated to delivering our quality products so we can guarantee maximum care is taken during the delivery process.


Our deliveries take place Monday to Friday between the hours of 8:00am and 6:00pm.


When the delivery vehicle is unloaded, it is important that you check to make sure all of the items and instructions have arrived and are correct. You will also receive a component list to check your items against. If anything is missing or damaged, it is essential that you note this on your paper work when you hand it back to the delivery driver.


Prices for our delivery services can be found on individual products.


Please note that goods will be delivered to the first point of contact at the front of your property e.g. on your driveway. This must be within 20m from the delivery vehicle (Safely Parked at Kerbside). Our team will be responsible for assessing the risk of carrying out delivery upon arrival at the property.


Should you require further information on our assisted delivery services, please click here to read our Terms and Conditions, alternatively you can contact a member of our Sales Team.





Q: Where can I find more information?

A: If you have any questions regarding your delivery, you can telephone our Dispatch Team. Contact details for the Dispatch Team of your nearest branch can be found on your order confirmation. If you need to track your delivery or access your manuals in advance of your delivery, you can visit the Customer Log In Area of our website https://dunsterhouse.co.uk/customer-login-area/log-in



Thank you for taking the time to read about our terms and advice during this period. We hope you can enjoy your Dunster House garden product for many years to come.

Warmalog temperature test - 19/04/2017
Temperature outside the Warmalog Cabin:  11°c
Temperature inside the Warmalog Cabin: 12°c

Temperature after using a 2KW heater:
After 30 minutes: 22° c
After 60 minutes: 30° c

Wall, roof and floor temperature:
The top of the rear wall: 35°c
The bottom of the rear wall: 30°c
The top of the window wall: 32°c
The bottom of the window wall: 30°c
The top of the door wall: 34°c
The bottom of the door wall: 29°c
The top of the full wall: 35°c
The bottom of the full wall: 32°c
The temperature of the roof averaged between 34°c and 35°c
The temperature of the floor averaged between 28°c and 29°c

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† Reference to Price on 22nd December 2023
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