MOVEMENT, TWISTING & WARPING
Wood contains a natural level of moisture so decreasing humidity levels in the surrounding air may cause panels to change their
shape as the porous fibres shrink. This can be exaggerated during prolonged periods of dry weather. Movement and gaps in
timber products are normal. In most cases, the wood will revert to its original form once the high temperatures subside and there
is more moisture content in the air. Similarly, in winter months, the opposite may occur with wood swelling.
CARE & ATTENTION
To help you get the most out of our products, it is useful to know a little more about the properties of timber, what
is normal and how your summerhouse may behave as the seasons change. Wood is an extremely durable material
for construction but, as a natural product, when used outdoors it is susceptible to changes in the environment.
3
EXPANSION, CONTRACTION, SPLITS & CRACKS
All timber will expand and contract according to its environment. As a result of this expansion and contraction, it is very common
to see splits and cracks developing in the wood. Splits are common during the spring and summer months as the wood begins to
dry out. The outer surface dries first and contracts over the still expanded core of the wood. The result is that splits and cracks
appear along the grain of wood. These splits are not a fault and do not affect the structural integrity of a product.
MOULD & BLUE STAIN
Mould is a surface-dwelling fungus that feeds on the nutrients and debris contained in the surface cells of timber. The most
common problems associated with mould are discoloured timber and an increase in permeability of the timber. Blue stain is part
of the same family but penetrates deeper into the surface layers of the timber. It stains the timber a dark blue, whereas mould is
usually black. These do not cause the timber to rot. Keep the building well ventilated to avoid mould.
POSITION YOUR SUMMERHOUSE IN THE BEST LOCATION IN YOUR GARDEN
Avoid areas where water pools and which are constantly wet. Position away from trees and cut back any overhanging foliage which can
cause moisture to be trapped against the summerhouse walls and debris to collect on the roof.
1
RAISE YOUR SUMMERHOUSE OFF THE GROUND
Ideally, any concrete base should be the same footprint as the summerhouse to allow surface water to run off without pooling. A timber
base can also be used. Raise your summerhouse 50mm above ground level.
2
SEAL THE BEARERS
If using a wooden base, we recommend treating it with a treatment containing wax or oil. Also coat the bearers that come into contact
with the ground to prevent moisture rising.
3
USE AN END-GRAIN PROTECTOR
To protect the corners and panel joins, an end grain treatment can be applied.
4
SEAL THE PANELS & WINDOWS
Use a flexible silicone sealant around windows to prevent water ingress. This can also be used where two sections of the summerhouse join
together. Apply internally.
5
Treat your building annually. We advise the application of a high-quality preservative that contains a
mildewcide. For more information on the conditions of our guarantee see
forestgarden.co.uk.
CONSIDER ADDING GUTTERS
Adding guttering around the fascia of the summerhouse will redirect rain water away from the summerhouse’s foundation.
6
KEEP VENTILATED
Good airflow around the perimeter of the summerhouse and regular ventilation inside the summerhouse will help prevent mould and
mildew.
7
CONSIDER A WEATHERPROOFING STAIN OR CLEAR TREATMENT
We recommend you painting your summerhouse with a weatherproofing treatment at least once a year. This will help maintain the wood,
stabilise timber movement and help prolong the life of your summerhouse.
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THINGS THAT YOU MIGHT SEE IN YOUR PRODUCT
8 TOP TIPS TO ENSURE YOUR SUMMERHOUSE IS FULLY WATERPROOF
THE ROOF OF THIS BUILDING IS NOT A LOAD BEARING STRUCTURE
ADVICE ON FELT HANDLING & USAGE
Roof felt is flexible at temperatures above 5°C. In cold temperatures, extra care must be taken when handling and installing to prevent cracking
and damage to the felt. The felt should not be rolled, folded or used in temperatures lower than 5° C. In cold temperatures, the felt should be
stored indoors above 10°C for 24 hours prior to use. Felt must be lifted, not dragged, and should be stored on its end on a dry surface.
HEALTH & SAFETY
We strongly recommend that PPE
(Personal Protective Equipment) is
used throughout your build to ensure
you are protected from any potential
health and safety risks.
Do not
exempt yourself from wearing PPE.
