Concrete Bases For Garages

Concrete Shed Basework.

A solid concrete base is required to erect the shed on.

We will not carry out erection on paving slabs or tarmac.

A base minimum 3” (75mm) longer and 3” (75mm) wider than the external size of the shed is recommended.

The concrete must be a minimum of 4” thick.

Concrete Garage Basework

All of our sectional buildings require a concrete base as a foundation.

Your local groundworks contractor can normally offer a base laying service, or alternatively you can consult a local builder.

The basework will have to conform to the following guidelines.

The concrete base will ideally be slightly higher than the surrounding area so water does not drain from the ground to the base.

The concrete itself should be a minimum of 4" (100mm) thick, and 6" (150mm) longer and 6" (150mm) wider than the external size of the garage.

Example:
Garage: 16'1" x 8'3"

Concrete Bases:

In order to check that your base is square, measure out a 3-4-5 triangle before securing your shuttering prior to laying concrete, as per the following diagram:

To double check your measurements, measure along the diagonals and ensure both measurements are equal, as per the diagram below.

If you are close to an existing building or boundary wall, ensure that you allow for the roof overhang (Knight roof 4" (100mm) either side, Apex roof 6" (150mm) either side).

This does not include gutter width. After the garage has been erected, we strongly recommend that a sand and cement fillet is pointed around the inside (not outside) of the building to prevent ingress of water between the panels and the base.

A 3 parts building sand : 1 part cement mix is recommended, with a PVA added to the mix.

IMPORTANT:

Seal the garage on the inside only, not the outside of the panels.