Aftercare guide
Summerhouses

Our Mark I summerhouse specification was retired in October 2023.

While it is no longer possible to buy a Mark I summerhouse, to ensure that yours lasts a lifetime, it needs some care and attention.

This guide provides everything you need to get the very best from your investment.

Introduction

Your summerhouse is made of timber that shrinks, swells and moves in response to moisture and temperature changes. This movement is perfectly normal in a single-skinned building. You should expect movement to occur in response to extremely wet weather conditions and after significant temperature changes.

These changes are usually small, but if your summerhouse is unused for several months at a time you will notice more significant changes to the building. While timber movement cannot be eliminated in a single-skinned building, there are various measures you can take to minimise its impact.

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To maximise the life, health and usage of your summerhouse follow these steps...

Painting Your Summerhouse

Your summerhouse arrived with a base coat of Sadolin. To fully protect your building, you must give it a second coat. We recommend doing this around 3 weeks after installation to allow for any settling or movement. You can also hire a professional to do this for you.
A tin of Sadolin SuperDec paint on a wooden deck.
What is Sadolin?
Our only choice for our summerhouses is Sadolin Super Dec or Sadolin Quick Dry. These microporous water-based paints allow your building to breathe while protecting it from moisture, insects and fungi.
Where can I buy Sadolin?

Sadolin is only available from registered stockists. Our closest supplier is Bannerman’s Colour Studio in either Perth or Dundee.

You can also buy Sadolin online at Decorating Warehouse. A full list of retail stockists is available here.

The name of the colour you chose is on your order form and final invoice.

How often should I repaint my summerhouse?

Fully repaint your summerhouse every 3-5 years. This will vary according to your location and how much bad weather your summerhouse deals with. A coastal summerhouse regularly battered by 100mph winds will need a new coat of paint sooner than a summerhouse sheltered in a garden.

If you see any fading or signs of wear and tear to the finish, it’s time for a coat of paint.

How often should I repaint my summerhouse?

Fully repaint your summerhouse every 3-5 years. This will vary according to your location and how much bad weather your summerhouse deals with. A coastal summerhouse regularly battered by 100mph winds will need a new coat of paint sooner than a summerhouse sheltered in a garden.

If you see any fading or signs of wear and tear to the finish, it’s time for a coat of paint.

Why do I have to paint my summerhouse?
Because timber is porous it needs an additional layer of protection from moisture. Each coat of Sadolin adds more years of protection to your summerhouse by minimising the risk of water ingress. Without a coat of paint, the timber would easily absorb any moisture in the air, which would then transfer to the inside of the building.
Featured Friends - Who do we recommend for painting your G&M building - blog feature image
Do I have to paint the inside of my summerhouse?

This is your individual preference - you can leave the inside of your summerhouse unpainted.

If you want to paint the inside of your summerhouse, we recommend Sadolin diluted with water at a ratio of 2:1.

DO NOT use varnish, as this traps moisture and causes the timber to blacken.

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Painting summerhouse doors

Moisture and temperature changes cause movement in timber buildings. To prevent your door from sticking or shifting, make sure that the entire door is painted - front, back, and all around the edges.

Opening windows should also be completely coated with paint to prevent timber movement

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How do I fix summerhouse doors that won’t open or close?

If your doors have moved so much that you can’t close or open them, there is a straightforward carpentry method to rectify them.

We offer a service to do this at our hourly rate. Alternatively, any reputable joiner will be able to carry out the work. We do not advise adjusting the doors if there's movement or sticking as it does more damage than good.

The Kindrogan
Polyhedron phenomenon
Image

The Kindrogan is a pyramid roof on a Rannoch body, a hybrid design to give you the best of both worlds.

Much like The Rannoch, The Kindrogan Garden Room gives you the versatility of the square/rectangular room for the best use of space whilst having the extra finesse of the shaped roof - which comes with the Isola shingles as standard.

Shape & Style
ImageImage
Sizes & Pricing
Size (ft)
Price
8'
x
8'
2.4m
x
2.4m
£11,247
10'
x
8'
2.7m
x
2.7m
£12,747
10'
x
10'
3m
x
3m
£13,797
Prices include VAT, delivery and assembly within 40 miles of Errol
enquire about this designSpeak to our team
The Deuchny
Five sides of wonder
Image

A shaped goddess comprising of a five-sided roof with an angled corner back, perfect for gardens with limited space. The Deuchny’s pitch comes together in the centre creating an outstanding focal point.

Her roof is Isola shingles which is beautiful, sustainable and replicates the traditional slate roof for that extra bit of flair.

Shape & Style
ImageImage
Sizes & Pricing
Size (ft)
Price
8'
x
8'
2.4m
x
2.4m
£11,247
9'
x
9'
2.7m
x
2.7m
£12,747
10'
x
10'
3m
x
3m
£13,797
Prices include VAT, delivery and assembly within 40 miles of Errol
enquire about this designSpeak to our team

Moisture Prevention

Your summerhouse is single-skinned, with only one layer of timber cladding between the outside and inside of the building.

Because of this, small amounts of moisture can penetrate the walls during excessively wet weather. In a well-painted building, this happens very slowly. But in sustained wet weather moisture can build up inside your summerhouse. This leads to mould and can damage the building and its contents.

The easiest way to prevent this is to ventilate your summerhouse regularly.

What kind of base do I need for a Summerhouse
How do I ventilate my summerhouse?

There’s no special equipment required to ventilate your summerhouse - just open the windows and doors and get some air into the building.

On a dry day, open up the windows and doors and leave these open for a couple of hours.

Ventilation is essential during the colder, wetter months when it seems difficult to find any dry days. Keep an eye out for opportunities to ventilate your summerhouse as this is when it needs it most.

How do I prevent moisture in my summerhouse?

You can also add moisture traps to your summerhouse when the weather is extremely wet. These are small containers with chemicals inside that collect moisture in the air.

If your summerhouse has electricity you can also use a powered dehumidifier.

Why is it so important to prevent moisture in my summerhouse?
Where there’s moisture, mould can grow. Once mould appears inside your building, it’s incredibly difficult to remove. By painting and ventilating your summerhouse you’re defending the building against mould.
What can I do if my summerhouse has mould inside?
Bleach can reduce the visible signs of mould, but it won’t remove the fungi that cause the problem. The best ways to prevent mould overgrowth are regular ventilation and reducing the moisture inside the building.
The Kindrogan
Polyhedron phenomenon
Image

The Kindrogan is a pyramid roof on a Rannoch body, a hybrid design to give you the best of both worlds.

Much like The Rannoch, The Kindrogan Garden Room gives you the versatility of the square/rectangular room for the best use of space whilst having the extra finesse of the shaped roof - which comes with the Isola shingles as standard.

Shape & Style
ImageImage
Sizes & Pricing
Size (ft)
Price
8'
x
8'
2.4m
x
2.4m
£11,247
10'
x
8'
2.7m
x
2.7m
£12,747
10'
x
10'
3m
x
3m
£13,797
Prices include VAT, delivery and assembly within 40 miles of Errol
enquire about this designSpeak to our team
The Deuchny
Five sides of wonder
Image

A shaped goddess comprising of a five-sided roof with an angled corner back, perfect for gardens with limited space. The Deuchny’s pitch comes together in the centre creating an outstanding focal point.

Her roof is Isola shingles which is beautiful, sustainable and replicates the traditional slate roof for that extra bit of flair.

Shape & Style
ImageImage
Sizes & Pricing
Size (ft)
Price
8'
x
8'
2.4m
x
2.4m
£11,247
9'
x
9'
2.7m
x
2.7m
£12,747
10'
x
10'
3m
x
3m
£13,797
Prices include VAT, delivery and assembly within 40 miles of Errol
enquire about this designSpeak to our team

Roofs & Guttering

Your summerhouse comes with maintenance-free steel box profile roofing or shingles. The steel roofing is guaranteed for 20 years, and won’t need replacing for at least 30 years. Roofing shingles are guaranteed for 15 years. Wait for signs of wear and tear before opting to replace, as these roofs will often last far beyond their guaranteed lifespan, depending on weather exposure.
Image
Cleaning and maintenance

Your summerhouse will receive plenty of rainwater washes, but if you prefer you can wash your summerhouse roof with soap and water.

If you opt for guttering on your summerhouse, make sure to check it at least twice a year and clean it if necessary. More regular checks may be necessary if there are overhanging trees above the building. Avoid blockages such as leaves or moss to ensure that water is moved away from your summerhouse effectively.

The Kindrogan
Polyhedron phenomenon
Image

The Kindrogan is a pyramid roof on a Rannoch body, a hybrid design to give you the best of both worlds.

Much like The Rannoch, The Kindrogan Garden Room gives you the versatility of the square/rectangular room for the best use of space whilst having the extra finesse of the shaped roof - which comes with the Isola shingles as standard.

Shape & Style
ImageImage
Sizes & Pricing
Size (ft)
Price
8'
x
8'
2.4m
x
2.4m
£11,247
10'
x
8'
2.7m
x
2.7m
£12,747
10'
x
10'
3m
x
3m
£13,797
Prices include VAT, delivery and assembly within 40 miles of Errol
enquire about this designSpeak to our team
The Deuchny
Five sides of wonder
Image

A shaped goddess comprising of a five-sided roof with an angled corner back, perfect for gardens with limited space. The Deuchny’s pitch comes together in the centre creating an outstanding focal point.

Her roof is Isola shingles which is beautiful, sustainable and replicates the traditional slate roof for that extra bit of flair.

Shape & Style
ImageImage
Sizes & Pricing
Size (ft)
Price
8'
x
8'
2.4m
x
2.4m
£11,247
9'
x
9'
2.7m
x
2.7m
£12,747
10'
x
10'
3m
x
3m
£13,797
Prices include VAT, delivery and assembly within 40 miles of Errol
enquire about this designSpeak to our team

Summary

Along with the guidance above – if you follow this rough timeline you'll keep your Summerhouse in tip top condition:
3 weeks after delivery:
Apply a second coat of paint to protect your summerhouse from the weather.
Fortnightly:
On a dry day, open your summerhouse’s doors and windows and ventilate the building for 2-4 hours.
After 2 or more consecutive rainy days:
Open your summerhouse’s windows and doors and ventilate the building for 2-6 hours.
In September:
Inspect your summerhouse to check for any water ingress, wear and tear and signs of mould.
September-April:
Add moisture traps to collect any excess moisture. Remember to empty these regularly.

FAQs

Can I add window boxes to my summerhouse?
It’s not a good idea to add things to the outside of your summerhouse, especially things like window boxes or trellises. These encourage plant growth which causes localised moisture spots. Over time, constant moisture exposure in one area of your building could cause rot.
Will garden maintenance affect my summerhouse?
Keep the area around the base of your building free from weeds and tall grass. These can conduct moisture to the wall panels. Please prune overhanging trees and shrubs regularly to avoid abrasion to the building.
Will my summerhouse’s contents affect its performance?

Dust and mould can accumulate if the building is crammed full with no spaces for air to circulate. Using shelves and storage containers ensures that there is airflow throughout the inside of the building.

What about wet items?

Any wet items in your summerhouse bring moisture into the building. If this moisture can’t escape it can condense on the walls, roof or other items. Protect your summerhouse contents by wiping off excess moisture from wet items before storing them inside.

Is there anything I shouldn’t store in my summerhouse?

Perishable items like paper and fabric don’t do well in a single-skinned summerhouse. They’ll soak up any moisture in the air and are hugely susceptible to mould.

If you have any of these items in your summerhouse, store them in plastic boxes with lids, and check them regularly for any signs of mould or moisture.

What other preventative measures can I take?

Deterring splashback onto your summerhouse walls makes a dramatic difference to the lifespan of your building. A 6” gravel soakaway all around the base of the building ensures that water runs away from the building instead of collecting against the wall panels.

Adding gutters to your building will also prevent splashback. Pay close attention to any other factors that may encourage water to accumulate around specific areas of the building, as these areas will be susceptible to rot and damage.

The Kindrogan
Polyhedron phenomenon
Image

The Kindrogan is a pyramid roof on a Rannoch body, a hybrid design to give you the best of both worlds.

Much like The Rannoch, The Kindrogan Garden Room gives you the versatility of the square/rectangular room for the best use of space whilst having the extra finesse of the shaped roof - which comes with the Isola shingles as standard.

Shape & Style
ImageImage
Sizes & Pricing
Size (ft)
Price
8'
x
8'
2.4m
x
2.4m
£11,247
10'
x
8'
2.7m
x
2.7m
£12,747
10'
x
10'
3m
x
3m
£13,797
Prices include VAT, delivery and assembly within 40 miles of Errol
enquire about this designSpeak to our team
The Deuchny
Five sides of wonder
Image

A shaped goddess comprising of a five-sided roof with an angled corner back, perfect for gardens with limited space. The Deuchny’s pitch comes together in the centre creating an outstanding focal point.

Her roof is Isola shingles which is beautiful, sustainable and replicates the traditional slate roof for that extra bit of flair.

Shape & Style
ImageImage
Sizes & Pricing
Size (ft)
Price
8'
x
8'
2.4m
x
2.4m
£11,247
9'
x
9'
2.7m
x
2.7m
£12,747
10'
x
10'
3m
x
3m
£13,797
Prices include VAT, delivery and assembly within 40 miles of Errol
enquire about this designSpeak to our team