Basic SIPs Construction Techniques

Basic guide to using Structural Insulated Panels (SIPs)

Timelapse Video

Before starting

Check condition of all parts. slight damage to corner of panel during installation should not affect the structural integrity of the panel

Store Panels in dry conditions

Storing panels in wet conditions will adversely affect the performance of the panels and may cause fitting problems. Panels fitted in wet weather can swell at the seams. Use of a plastic sheet during build can prevent water damage and keep floor clean

Foundations differ for each build, efforts should be made to fix or anchor the building to the base or piles. A level base is essential.

Any timbers cut to size should have ends retreated with suitable preservative.

  • Sips Trade
  • Internal Sips

Step 1 Slip


Join between panels screwed every 6 to 8 inches.

Polyurethane glue used on all joints

Sole plates

Polyurethane glue used on all joints

Use 40mm & 80mm screws

Check for accuracy and torx scew the corner together

Step 2 Sole Plates

Step 3 Top Ring

Top Ring Beams

Top ring beams placed in and screwed every 6 to 8 inches inside and outside faces

Roof Panels

Roof panels have timber edges

40mm screws used for positioning Torx screws used to secure roof panels

Step 4 Roof Panels

Step 5 Overhangs


Overhangs and battens for rubber roof are applied with screws

Internal Walls

Internal walls are fixed using a timber insert screwed to the wall with 80mm screws the the wall panel slotted on and screwed with 40mm screws on both sides keeping 6 to 8 inches between screws

Door heights should be marked on the sip, allowing for fitting tolerance, before setting the door timber

wider door apertures will require greater top tolerance to allow for deflection of beam.

Step 6 Internal Walls

Construction Notes

Remember to check squareness when securing each panel , use a couple of screws first , check the if square continue with fixing.

Start at one corner for stability then connect each subsequent panel meeting at a door or window depending on design.
The panels will be affected by moisture if stored outside for long period prior to building, this may make joints tight.

Foam adhesive may be used for a full airtight joint. It is recommended that you fit the panel first to check alignment then remove to apply foam( as it is fast

Useful tools
Power screwdriver / Impact Driver (very good for Timberlock or Torx bolts)