Custom Four-Foot By Eight-Foot Pergola Kit
With Additional Roof Rafters and Roof Timbers,
and Heftier Support Posts

If you'd like to increase the amount of shade your pergola creates there are several options you can choose. (All of these options are available during the checkout process.) The least expensive option is to choose lattice panels for the rooftop.

If you prefer the traditional open pergola roof but want more shade, consider adding additional roof slats and/or roof rafters.  The standard spacing for the 2" x 2" roof slats is 18" on center.  The rafters below them (1 7/8"W x 5 3/4"H on the large pergolas and 1 7/8”W x 3 3/4”H on the smaller pergolas) are also at 18” on center as the standard spacing.  The 18” on center spacing allows for good visibility and significant shading.  When you consider that the sun is rarely directly overhead, the standard 18" on center spacing is a good balance between visibility (night sky viewing..) and shading during the day. For a small additional cost, you can significantly increase shading by ordering your pergola with the roof slats at 12" on center.  If you require additional shading, you can move the roof slats less than 12" on center.  Just email or call us if you’d like to do this. 

An additional shade increasing option is to move the rafters to 12” on center also.  Because the rafters are significant sized timbers, this is a costlier addition than the roof slats. But, the pergolas with both 12” slat spacing and 12” rafter spacing offer an attractive and very shady structure.  We can custom make the pergola roofs with the slat and rafter spacing that works best for you.

Small Pergolas (Under 100 sq. ft with maximum 12' spans)- Dimensions below refer to roof size. Corner posts are 3 3/4" X 3 3/4". Roof support timbers and rafters are 1 7/8" X 3 3/4". Posts are recessed 9 1/2" in from roof dimensions.

Young
10 Years

Mature
20 Years

Old-Growth Redwood
30 Years

3 X 6:

200 lbs

3 X 8:

230 lbs

4 X 8:

260 lbs

4 X 9:

270 lbs

4 X 10:

290 lbs

4 X 12:

320 lbs

6 X 6:

270 lbs

6 X 8:

320 lbs

6 X 9:

350 lbs

6 X 10:

370 lbs

6 X 12:

420 lbs

8 X 8:

390 lbs

8 X 10:

450 lbs

8 X 12:

510 lbs

9 X 9:

450 lbs

9 X 10:

490 lbs

9 X 11:

530 lbs

Large Pergolas - Dimensions below refer to roof size. Corner posts are 5 1/2" X 5 1/2". Roof support timbers and rafters are 1 7/8" X 5 3/4". Posts are recessed 12" in from roof dimensions.

4 X 8 With Heavy Timbers:

300 lbs

4 X 14:

410 lbs

4 X 16:

390 lbs

6 X 14:

550 lbs

6 X 16:

610 lbs

10 X 10:

705 lbs

10 X 12:

795 lbs

10 X 14:

885 lbs

10 X 15:

930 lbs

10 X 16:

975 lbs

10 X 18:

1065 lbs

10 X 20:

1155 lbs

10 X 22:

1245 lbs

12 X 12:

903 lbs

12 X 14:

1011 lbs

12 X 15:

1065 lbs

12 X 16:

1119 lbs

12 X 18:

1227 lbs

12 X 20:

1335 lbs

14 X 14:

1137 lbs

14 X 16:

1263 lbs

14 X 18:

1389 lbs

14 X 20:

1515 lbs

15 X 15:

1268 lbs

15 X 18:

1470 lbs

15 X 20:

1605 lbs

16 X 16:

1407 lbs

16 X 18:

1551 lbs

16 X 20:

1695 lbs

18 X 18:

1713 lbs

18 X 20:

1875 lbs

20 X 20:

2055 lbs

20 X 25: (Set with 6 posts)

2505 lbs

$125 Includes 4 Metal Anchors, 8 Anchor Bolts, 8 Lag Bolts and 16 matching Redwood Trim Pieces

Framed custom sized panels: any width up to 48" and up to 8 Ft. long - same price:

Framed custom sized panels: any width up to 48" and lengths between 8 Ft. and 12 Ft. - same price: