How the substrate affects external timber doors

2015-07-22T10:09:50Z

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How the substrate affects external timber doors

2015-07-22T09:54:09Z

Tomjohn: Created page with " When you have decided to use external timber doors around your home, it is important to note that they contain a number of substrate features that could affect their performanc..."

When you have decided to use external timber doors around your home, it is important to note that they contain a number of substrate features that could affect their performance, either now or in the future. In this article, we have taken a closer look at some of these features and the affects they can have in the hopes you will be prepared. Sometimes, simply painting or staining your door can help you prevent any issues from occurring. 
*'''Density '''– The heavier and more dense the species you have selected, the less prone it will be to absorbing moisture. The lighter the species, the more prone it will be to taking on moisture. 
*'''Edges''' – The presence of sharp areas can actually create stress in paint films, eventually causing them to fail. Arrised or rounded edges, on the other hand, permit film movement with minimal stress. ''' '''
*'''Unseasoned (Green) '''– The use of timber that is “green” increases the likelihood of blistering and peeling in the paint. You will find that a stain will be much more effective (and look better). ''' '''
*'''Weathered vs Unweathered''' – [http://www.doorsandleadlight.com.au/timber-doors External timber doors] that have been exposed to weathering prior to being finished often experience poor paint adhesion, but stains don’t tend to be affected. 
*'''Heartwood vs Sapwood''' – You will find that heartwood has better staining potential than sapwood, but both are quite suitable for being painted. It doesn’t really matter which you choose. 
*'''Smooth vs Coarse''' – Surfaces with a smooth texture are able to hold paint better than those that are coarse. Surfaces with a coarse texture, however, will provide a better performance. 
*'''Gum Pockets''' – The presence of gum pockets in the door can lead to resin exudation, unless you have pre-treated and sealed them. This is incredibly important if you want to maintain the appearance. 
*'''Knots '''– The presence of knots in the timber can lead to premature cracking, staining and resin exudation. These occurrences can be avoided using knotting varnish or on manufacturer’s advice. 
*'''Bark '''– If any pieces of bark, no matter how small, are allowed to remain on the door it could lead to the premature failure of any coating (including both paint and stains). 
*'''Insect Damage –''' Whilst we are sure that you want to avoid timber with any sort of insect damage, sometimes this cannot be avoided. The damage must be treated or filled before finishing to avoid failure. ''' '''
*'''Moisture Range''' – The normal range is between 10 and 15%. Levels that are higher can be very detrimental, particularly if you intend to use a solvent borne finish (where moisture vapour permeability is low). 

We hope that the information provided above has given you a better understanding of how different substrate features could affect the performance and, eventually, the appearance of your external timber doors. It is important that you are aware of what issues you may face and how they can be rectified, as this will ensure that your door offers you a number of years of service. If you have any questions, ensure that you speak with your supplier.

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How the substrate affects external timber doors

How the substrate affects external timber doors