(Sizes shown are approximate & full sizes are shown in the product Specification)
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Save yourself time, energy, and money by opting for our Severn Insulated Log Cabin. Featuring our unique Warmalog; a 62mm sandwich of timber and Polyisocyanurate, the same insulator used by NASA, the Warmalog Cabin is far easier and quicker to build than a standard insulated cabin which would need to be 140mm thick to reach the same thermal efficiency. Our wide-opening French Double Doors have a tall walkthrough height so your guests won’t have to duck to enter! The doors, along with the large double glazed windows, make this the perfect additional seating space for family BBQ’s and al fresco dinners. When you are finished, simply secure your cabin with our 4 point locking doors and know that it is secure until next time.
We can significantly undercut competitors offering uPVC options as we are a large DIY window and door manufacturer. We do not buy windows and doors from another company therefore we do not need to markup our prices and transfer the cost to our customers. Providing you with great value!
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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
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
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
10 Year Guarantee
Avoid sagging roofs
Steel Braces
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
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
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
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!
What is a Warmalog Insulated Log Cabin?
What size Cabin can I have?
How big is this Insulated Log Cabin?
How high is this Insulated Log Cabin?
How much is this Insulated Log Cabin?
What base do I need for this Insulated Log Cabin?
Can I paint the Log Cabin?
Do I need planning permission for this Insulated Log Cabin?
How thick are the walls?
What are u-values?
Do you deliver to Scotland?
Does Dunster House Responsibly Source Its Timber?
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:
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