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Dunster House Ltd.
Established 1994
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Maintaining Pressure Treated Gazebos and Arbours
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Maintaining Pressure Treated Gazebos and Arbours




If required you can download a copy of the instruction manual using the following link:



Maintenance is very important in order to keep your gazebo or arbour in good condition and prolong its life. We recommend that it is carried out seasonally. In this guide we will cover:


Removing mould / mildew


If there is mould on the timber it will need to be cleaned with a mild bleach solution or mould cleaner to kill the spores. Mildew can be dealt with using a mild detergent and warm water.


Treating the timber


Although your gazebo has been pressure treated, we still recommend treating it periodically with a suitable water repellent treatment to minimise, but not completely remove the possibility of twisting, warping, cracking or other physical deformation caused by changing moisture content. We use Sovereign Clear Water Repellent Wood Treatment on our display models as this creates a barrier which repels water but still allows the wood to breathe. You should make sure that the timber is free from debris and surface moisture and that the treatment is applied as per the manufacturer's guidelines.


Base inspection


If your building is installed on an artificial base, check it is in good condition and that it has not subsided at all. If your product is installed on grass or soft ground, check the levels to make sure that there are no problems. An un-level base will cause issues with the product and may make it unsafe. No timbers should be submerged in the ground as this will void the guarantee. You should keep the area weed free and any grass short so that timbers can dry out after any periods of wet weather.


Timber inspection


Check that all fixings are tightened and in good condition, replace any that have broken or sheared. Inspect the condition of the timbers and ensure that there are no broken parts, paying particular attention to structural components. Cracks and splits are normal and will be more evident in warm and dry weather, further cracks can be prevented by treating the timber as described above.


Roof inspection


If you have a roof covering such as felt or shingles, check the fixings are sound and that the covering has no holes. The roof should be kept free from debris. Shingles may become torn or flap up during adverse weather conditions, you should replace any torn tiles and fix down any that are not secure using lap adhesive and more clout nails if required. Felt does not have as long of a life expectancy as shingles and will need to be replaced when it deteriorates.




Please see the link below for details of our ten year guarantee against fungal decay and insect infestation in pressure treated timbers, as well as corrosion in hot-dipped galvanised steel:


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