---
title: Do I need trim board for my attached greenhouse?
description: "Yes, a trim board is additional construction material,\nsupplied by the customer, that is used as a flat\nsurface to fasten a greenhouse frame to."
---
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# Do I need trim board for my attached greenhouse?
## Yes, a trim board is additional construction material, supplied by the customer, that is used as a flat surface to fasten a greenhouse frame to.
When purchasing a building attached greenhouse such as
a gable-attached or lean-to style (or lean-to which is also
gable-attached), we will supply you with a trim attachment
elevation drawing, showing the dimensions, angles and
generic materials that will be needed. This trim board
will be fastened to your building in preparation for the
greenhouse installation to occur afterwards.
The sizing of the trim board can vary. It is important that the
proper dimensions are confirmed so that your greenhouse
foundation is correct. For example, if the trim board is 2”
thick, your total foundation will need to be 2” longer to
account for the addition of the trim board.
Tips:
• The thickness of the trim board will always need to be
added to the exterior dimensions of the greenhouse
we supply when preparing your foundation.
• Ensure that you have the proper foundation dimensions
for your greenhouse; specific options or customizations
can change the standard dimensions required.
• Trim board material is not included with your
greenhouse purchase and will need to be sourced at
your local hardware store.
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