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 the winter months, the opposite may occur with wood swelling.
CARE & ATTENTION
To help you get the most out of our products it’s useful to know a little more about the properties of timber, what’s
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.
4
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, contracting over a still expanded core of the wood. The result of this 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.
MAKE SURE YOU POSITION YOUR SUMMERHOUSE IN THE BEST LOCATION IN YOUR GARDEN
Avoid areas where water pools and is constantly wet. Position away from trees and cut back any overhanging foliage which can cause
moisture to be trapped against summerhouse walls and debris to collect on the roof.
1
RAISE YOUR SHED 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
summerhouse base can also be used. Raise 50mm above ground level.
2
SEAL THE BASE
We recommend a treatment containing wax or oil, paint the bearers that come into contact with the ground to prevent moisture coming
up.
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 2 sections of the summerhouse joint
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 shed’s foundation.
6
KEEP VENTILATED
Good airflow around the perimeter of the shed and regular ventilation inside the shed will help prevent mould and mildew.
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CONSIDER A WEATHERPROOFING STAIN OR CLEAR TREATMENT
We recommend you paint 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 shed.
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TREATED TIMBER CONTAINING A BIOCIDAL PRODUCT
CONTROL OF WOOD DESTROYING ORGANISMS
Active Ingredients
- Propiconazole, Tebuconazole, IPBC, Permethrine, Benzyl-C12-16-Alkyldimethyl Chlorides. (Dip Treated)
Basic Copper Carbonate, DDA Carbonate, DDA Chloride. (Pressure Treated)
Wear gloves when handling. Avoid inhalation of sawdust. Do not use in contact with drinking water or food. Do not use for animal
bedding or in fish ponds. Dispose of treated wood responsibly.
THINGS THAT YOU MIGHT SEE IN YOUR PRODUCT
8 TOP TIPS TO ENSURE YOUR SHED IS FULLY WATERPROOF
THE ROOF OF THIS BUILDING IS NOT A LOAD BEARING STRUCTURE
ADVICE ON FELT HANDLING & USAGE
Roofing 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 above 10°C (indoors) for 24 hours prior to use. Felt must be lifted, not dragged and should be stored on its end on a dry
surface.
