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PVC Fascia & Soffit - The Basics

Fascia, Soffit, Barge Board, Gables, Box Ends - If you haven't used PVC Fascias before the terms can be baffling. Our video below uses a simple model to demontrate which piece goes where.

 

There are two distinct types of fascia, one is the standard fascia board which is also known as the mammoth or jumbo fascia board.

The important factor is the board thickness, and this ranges between 16mm and 25mm meaning it can be nailed straight on to the rafter ends and is strong enough to support your guttering.

The second type of fascia board is known as a cover board which is only 9mm thick and isn’t strong enough to go straight onto the rafter and support the gutter so it needs a timber backing board. This type is often used in refurbishments when a board needs painting or is showing signs of rot. The rot can be removed and then the cover board is put over the top.

The board underneath that returns from the front of the fascia, back to the wood is called a soffit board.  The soffit board has a non-structural purpose as it is purely there to close the gap from the roof. The soffit board can be plain or vented, depending on how you wish to ventilate your roof.

The board that comes down from the gable end is called the barge board, and it is usually the same as the fascia board (although the actual size can be different).

The name given to the intersection between the fascia and the barge board is a box end. This is the most technical detail on the eaves.

It is important to remember that you should never join two boards directly together as you should allow for a 10mm gap for expansion. PVC does expand slightly in warmer weather conditions, resulting in a small 5mm movement of the fascia board.

 


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